{"id":20781,"date":"2022-04-03T15:09:57","date_gmt":"2022-04-03T09:39:57","guid":{"rendered":"https:\/\/ccssmathanswers.com\/?p=20781"},"modified":"2022-04-07T11:42:53","modified_gmt":"2022-04-07T06:12:53","slug":"big-ideas-math-answers-grade-2-chapter-9","status":"publish","type":"post","link":"https:\/\/bigideasmathanswers.com\/big-ideas-math-answers-grade-2-chapter-9\/","title":{"rendered":"Big Ideas Math Answers Grade 2 Chapter 9 Add Numbers within 1,000"},"content":{"rendered":"<p>Avail free Big Ideas Math Grade 2 Chapter 9 Add Numbers within 1,000 Answer Key PDF on this page. This handy <a href=\"https:\/\/bigideasmathanswers.com\/big-ideas-math-answers-grade-2\/\">Big Ideas Math Answers Grade 2<\/a> 9th Chapter Add Numbers within 1,000 contains solutions for each and every question in the textbook. Students can download BIM Book Grade 2 Chapter 9 Add Numbers within 1,000 Answers PDF and prepare well for the test.<\/p>\n<h1>Big Ideas Math Book 2nd Grade Answer Key Chapter 9 Add Numbers within 1,000<\/h1>\n<p>Practicing Big Ideas Math Grade 2 Book Chapter 9 Add Numbers within 1,000 will help the students who want to score good marks in the examination. We advise you to refer the different topics such as Add 10 and 100, Use a Number Line to Add Hundreds and Tens, Use a Number Line to Add Three-Digit Numbers, Use Compensation to Add Three-Digit Numbers, Use Partial Sums to Add Three-Digit Numbers, Use Models to Add Three-Digit Numbers, Add Three-Digit Numbers, and so on.<\/p>\n<p>By learning all those lessons, students can know various methods of adding numbers below 1000. Students have to work hard right from the beginning days of their school to be strong in the basics of math. Solve all the questions and verify whether your method of solving and the solution is correct or not by checking Big Ideas Math Book Answers Grade 2 Chapter 9 Add Numbers within 1,000. Tap on the link given below to learn that particular concept.<\/p>\n<p><strong>Vocabulary<\/strong><\/p>\n<ul>\n<li><a href=\"#Add_Numbers_within_1,000_Vocabulary\">Add Numbers within 1,000 Vocabulary<\/a><\/li>\n<\/ul>\n<p><strong>Lesson 1 Add 10 and 100<\/strong><\/p>\n<ul>\n<li><a href=\"#Lesson_9.1_Add_10_and_100\">Lesson 9.1 Add 10 and 100<\/a><\/li>\n<li><a href=\"#Add_10_and_100_Homework_&amp;_Practice_9.1\">Add 10 and 100 Homework &amp; Practice 9.1<\/a><\/li>\n<\/ul>\n<p><strong>Lesson 2 Use a Number Line to Add Hundreds and Tens<\/strong><\/p>\n<ul>\n<li><a href=\"#Lesson_9.2_Use_a_Number_Line_to_Add_Hundreds_and_Tens\">Lesson 9.2 Use a Number Line to Add Hundreds and Tens<\/a><\/li>\n<li><a href=\"#Use_a_Number_Line_to_Add_Hundreds_and_Tens_Homework_&amp;_Practice_9.2\">Use a Number Line to Add Hundreds and Tens Homework &amp; Practice 9.2<\/a><\/li>\n<\/ul>\n<p><strong>Lesson 3 Use a Number Line to Add Three-Digit Numbers<\/strong><\/p>\n<ul>\n<li><a href=\"#Lesson_9.3_Use_a_Number_Line_to_Add_Three-Digit_Numbers\">Lesson 9.3 Use a Number Line to Add Three-Digit Numbers<\/a><\/li>\n<li><a href=\"#Use_a_Number_Line_to_Add_Three-Digit_Numbers_Homework_&amp;_Practice_9.3\">Use a Number Line to Add Three-Digit Numbers Homework &amp; Practice 9.3<\/a><\/li>\n<\/ul>\n<p><strong>Lesson 4 Use Compensation to Add Three-Digit Numbers<\/strong><\/p>\n<ul>\n<li><a href=\"#Lesson_9.4_Use_Compensation_to_Add_Three-Digit_Numbers\">Lesson 9.4 Use Compensation to Add Three-Digit Numbers<\/a><\/li>\n<li><a href=\"#Use_Compensation_to_Add_Three-Digit_Numbers_Homework_&amp;_Practice_9.4\">Use Compensation to Add Three-Digit Numbers Homework &amp; Practice 9.4<\/a><\/li>\n<\/ul>\n<p><strong>Lesson 5 Use Partial Sums to Add Three-Digit Numbers<\/strong><\/p>\n<ul>\n<li><a href=\"#Lesson_9.5_Use_Partial_Sums_to_Add_Three-Digit_Numbers\">Lesson 9.5 Use Partial Sums to Add Three-Digit Numbers<\/a><\/li>\n<li><a href=\"#Use_Partial_Sums_to_Add_Three-Digit_Numbers_Homework_&amp;_Practice_9.5\">Use Partial Sums to Add Three-Digit Numbers Homework &amp; Practice 9.5<\/a><\/li>\n<\/ul>\n<p><strong>Lesson 6 Use Models to Add Three-Digit Numbers<\/strong><\/p>\n<ul>\n<li><a href=\"#Lesson_9.6_Use_Models_to_Add_Three-Digit_Numbers\">Lesson 9.6 Use Models to Add Three-Digit Numbers<\/a><\/li>\n<li><a href=\"#Use_Models_to_Add_Three-Digit_Numbers_Homework_&amp;_Practice_9.6\">Use Models to Add Three-Digit Numbers Homework &amp; Practice 9.6<\/a><\/li>\n<\/ul>\n<p><strong>Lesson 7 Add Three-Digit Numbers<\/strong><\/p>\n<ul>\n<li><a href=\"#Lesson_9.7_Add_Three-Digit_Numbers\">Lesson 9.7 Add Three-Digit Numbers<\/a><\/li>\n<li><a href=\"#Add_Three-Digit_Numbers_Homework_&amp;_Practice_9.7\">Add Three-Digit Numbers Homework &amp; Practice 9.7<\/a><\/li>\n<\/ul>\n<p><strong>Lesson 8 Add Up to 4 Two-Digit Numbers<\/strong><\/p>\n<ul>\n<li><a href=\"#Lesson_9.8_Add_Up_to_4_Two-Digit_Numbers\">Lesson 9.8 Add Up to 4 Two-Digit Numbers<\/a><\/li>\n<li><a href=\"#Add_Up_to_4_Two-Digit_Numbers_Homework_&amp;_Practice_9.8\">Add Up to 4 Two-Digit Numbers Homework &amp; Practice 9.8<\/a><\/li>\n<\/ul>\n<p><strong>Lesson 9 Explain Addition Strategies<\/strong><\/p>\n<ul>\n<li><a href=\"#Lesson_9.9_Explain_Addition_Strategies\">Lesson 9.9 Explain Addition Strategies<\/a><\/li>\n<li><a href=\"#Explain_Addition_Strategies_Homework_&amp;_Practice_9.9\">Explain Addition Strategies Homework &amp; Practice 9.9<\/a><\/li>\n<\/ul>\n<p><strong>Performance task\u00a0<\/strong><\/p>\n<ul>\n<li><a href=\"#Add_Numbers_within_1,000_Performance_Task\">Add Numbers within 1,000 Performance Task<\/a><\/li>\n<li><a href=\"#Add_Numbers_within_1,000_Activity\">Add Numbers within 1,000 Activity<\/a><\/li>\n<\/ul>\n<h3><a id=\"Add_Numbers_within_1,000_Vocabulary\"><\/a>Add Numbers within 1,000 Vocabulary<\/h3>\n<p><img loading=\"lazy\" class=\"alignnone size-full wp-image-20792\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Answer-Key-Grade-2-Chapter-9-Add-Numbers-within-1000-v-1.png\" alt=\"Big Ideas Math Answer Key Grade 2 Chapter 9 Add Numbers within 1,000 v 1\" width=\"232\" height=\"122\" \/><br \/>\n<strong>Organize It<\/strong><br \/>\nUse the review words to complete the graphic organizer.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-20793\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Answer-Key-Grade-2-Chapter-9-Add-Numbers-within-1000-v-2.png\" alt=\"Big Ideas Math Answer Key Grade 2 Chapter 9 Add Numbers within 1,000 v 2\" width=\"575\" height=\"219\" srcset=\"https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Answer-Key-Grade-2-Chapter-9-Add-Numbers-within-1000-v-2.png 575w, https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Answer-Key-Grade-2-Chapter-9-Add-Numbers-within-1000-v-2-300x114.png 300w\" sizes=\"(max-width: 575px) 100vw, 575px\" \/><br \/>\nAnswer:<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-21763\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Book-2nd-Grade-Answer-Key-Chapter-9-add-Numbers-within-1000-organize-it.png\" alt=\"\" width=\"575\" height=\"234\" srcset=\"https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Book-2nd-Grade-Answer-Key-Chapter-9-add-Numbers-within-1000-organize-it.png 575w, https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Book-2nd-Grade-Answer-Key-Chapter-9-add-Numbers-within-1000-organize-it-300x122.png 300w\" sizes=\"(max-width: 575px) 100vw, 575px\" \/><\/p>\n<p><strong>Define It<\/strong><br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-20794\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Answer-Key-Grade-2-Chapter-9-Add-Numbers-within-1000-v-3.png\" alt=\"Big Ideas Math Answer Key Grade 2 Chapter 9 Add Numbers within 1,000 v 3\" width=\"592\" height=\"323\" srcset=\"https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Answer-Key-Grade-2-Chapter-9-Add-Numbers-within-1000-v-3.png 592w, https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Answer-Key-Grade-2-Chapter-9-Add-Numbers-within-1000-v-3-300x164.png 300w\" sizes=\"(max-width: 592px) 100vw, 592px\" \/><\/p>\n<p><img loading=\"lazy\" class=\"alignnone size-full wp-image-20795\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Answer-Key-Grade-2-Chapter-9-Add-Numbers-within-1000-v-4.png\" alt=\"Big Ideas Math Answer Key Grade 2 Chapter 9 Add Numbers within 1,000 v 4\" width=\"762\" height=\"448\" srcset=\"https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Answer-Key-Grade-2-Chapter-9-Add-Numbers-within-1000-v-4.png 762w, https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Answer-Key-Grade-2-Chapter-9-Add-Numbers-within-1000-v-4-300x176.png 300w\" sizes=\"(max-width: 762px) 100vw, 762px\" \/><br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-20796\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Answer-Key-Grade-2-Chapter-9-Add-Numbers-within-1000-v-5.png\" alt=\"Big Ideas Math Answer Key Grade 2 Chapter 9 Add Numbers within 1,000 v 5\" width=\"754\" height=\"388\" srcset=\"https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Answer-Key-Grade-2-Chapter-9-Add-Numbers-within-1000-v-5.png 754w, https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Answer-Key-Grade-2-Chapter-9-Add-Numbers-within-1000-v-5-300x154.png 300w\" sizes=\"(max-width: 754px) 100vw, 754px\" \/><\/p>\n<p><img loading=\"lazy\" class=\"alignnone size-full wp-image-20797\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Answer-Key-Grade-2-Chapter-9-Add-Numbers-within-1000-v-6.png\" alt=\"Big Ideas Math Answer Key Grade 2 Chapter 9 Add Numbers within 1,000 v 6\" width=\"755\" height=\"446\" srcset=\"https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Answer-Key-Grade-2-Chapter-9-Add-Numbers-within-1000-v-6.png 755w, https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Answer-Key-Grade-2-Chapter-9-Add-Numbers-within-1000-v-6-300x177.png 300w\" sizes=\"(max-width: 755px) 100vw, 755px\" \/><br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-20798\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Answer-Key-Grade-2-Chapter-9-Add-Numbers-within-1000-v-7.png\" alt=\"Big Ideas Math Answer Key Grade 2 Chapter 9 Add Numbers within 1,000 v 7\" width=\"753\" height=\"384\" srcset=\"https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Answer-Key-Grade-2-Chapter-9-Add-Numbers-within-1000-v-7.png 753w, https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Answer-Key-Grade-2-Chapter-9-Add-Numbers-within-1000-v-7-300x153.png 300w\" sizes=\"(max-width: 753px) 100vw, 753px\" \/><\/p>\n<p>Answer:<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-21764\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Book-2nd-Grade-Answer-Key-Chapter-9-add-Numbers-within-1000-organize-it-1.png\" alt=\"\" width=\"592\" height=\"323\" srcset=\"https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Book-2nd-Grade-Answer-Key-Chapter-9-add-Numbers-within-1000-organize-it-1.png 592w, https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Book-2nd-Grade-Answer-Key-Chapter-9-add-Numbers-within-1000-organize-it-1-300x164.png 300w\" sizes=\"(max-width: 592px) 100vw, 592px\" \/><\/p>\n<h3><a id=\"Lesson_9.1_Add_10_and_100\"><\/a>Lesson 9.1 Add 10 and 100<\/h3>\n<p><strong>Explore and Grow<\/strong><\/p>\n<p>Model 231. Make a quick sketch of your model.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-20782\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Answer-Key-Grade-2-Chapter-9-Add-Numbers-within-1000-9.1-1.png\" alt=\"Big Ideas Math Answer Key Grade 2 Chapter 9 Add Numbers within 1,000 9.1 1\" width=\"243\" height=\"119\" \/><br \/>\n231<\/p>\n<p>Model 10 more than 231. Make a quick sketch of your model.<br \/>\n231 + 10 = _____<\/p>\n<p>Model 100 more than 231. Make a quick sketch of your model.<br \/>\n231 + 100 = _____<br \/>\nAnswer:<br \/>\nModel 10 more than 231. Sketch of it:<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-22532\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Book-2nd-Grade-Answer-Key-Chapter-9-add-Numbers-within-1000-Explore-Grow-15.png\" alt=\"\" width=\"666\" height=\"150\" srcset=\"https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Book-2nd-Grade-Answer-Key-Chapter-9-add-Numbers-within-1000-Explore-Grow-15.png 666w, https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Book-2nd-Grade-Answer-Key-Chapter-9-add-Numbers-within-1000-Explore-Grow-15-300x68.png 300w\" sizes=\"(max-width: 666px) 100vw, 666px\" \/><br \/>\n231 + 10 = 241.<\/p>\n<p>231 + 100 = 331. Sketch of it:<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-22531\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Book-2nd-Grade-Answer-Key-Chapter-9-add-Numbers-within-1000-Explore-Grow-14.png\" alt=\"\" width=\"666\" height=\"150\" srcset=\"https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Book-2nd-Grade-Answer-Key-Chapter-9-add-Numbers-within-1000-Explore-Grow-14.png 666w, https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Book-2nd-Grade-Answer-Key-Chapter-9-add-Numbers-within-1000-Explore-Grow-14-300x68.png 300w\" sizes=\"(max-width: 666px) 100vw, 666px\" \/><br \/>\n231 + 100 = 331.<\/p>\n<p>Model 100 more than 231.<\/p>\n<p><strong>Show and Grow<\/strong><\/p>\n<p>Question 1.<br \/>\n317 + 10 = _____<br \/>\n317 + 100 = _____<br \/>\nAnswer:<br \/>\n317 + 10 = 327.<br \/>\n317 +100 = 417.<\/p>\n<p>Explanation:<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-22533\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Book-2nd-Grade-Answer-Key-Chapter-9-add-Numbers-within-1000-Explore-Grow-16.png\" alt=\"\" width=\"666\" height=\"150\" srcset=\"https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Book-2nd-Grade-Answer-Key-Chapter-9-add-Numbers-within-1000-Explore-Grow-16.png 666w, https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Book-2nd-Grade-Answer-Key-Chapter-9-add-Numbers-within-1000-Explore-Grow-16-300x68.png 300w\" sizes=\"(max-width: 666px) 100vw, 666px\" \/><\/p>\n<p><img loading=\"lazy\" class=\"alignnone size-full wp-image-22543\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Book-2nd-Grade-Answer-Key-Chapter-9-add-Numbers-within-1000-Apply-Grow-Practice-4.png\" alt=\"\" width=\"631\" height=\"147\" srcset=\"https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Book-2nd-Grade-Answer-Key-Chapter-9-add-Numbers-within-1000-Apply-Grow-Practice-4.png 631w, https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Book-2nd-Grade-Answer-Key-Chapter-9-add-Numbers-within-1000-Apply-Grow-Practice-4-300x70.png 300w\" sizes=\"(max-width: 631px) 100vw, 631px\" \/><\/p>\n<p>Question 2.<br \/>\n168 + 10 = _____<br \/>\n168 + 100 = _____<br \/>\nAnswer:<br \/>\n168 + 10 = 178.<br \/>\n168 + 100 = 268.<\/p>\n<p>Explanation:<\/p>\n<p><img loading=\"lazy\" class=\"alignnone size-full wp-image-22534\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Book-2nd-Grade-Answer-Key-Chapter-9-add-Numbers-within-1000-Explore-Grow-17.png\" alt=\"\" width=\"666\" height=\"150\" srcset=\"https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Book-2nd-Grade-Answer-Key-Chapter-9-add-Numbers-within-1000-Explore-Grow-17.png 666w, https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Book-2nd-Grade-Answer-Key-Chapter-9-add-Numbers-within-1000-Explore-Grow-17-300x68.png 300w\" sizes=\"(max-width: 666px) 100vw, 666px\" \/><\/p>\n<p>.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-22547\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Book-2nd-Grade-Answer-Key-Chapter-9-add-Numbers-within-1000-show-Grow..png\" alt=\"\" width=\"627\" height=\"154\" srcset=\"https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Book-2nd-Grade-Answer-Key-Chapter-9-add-Numbers-within-1000-show-Grow..png 627w, https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Book-2nd-Grade-Answer-Key-Chapter-9-add-Numbers-within-1000-show-Grow.-300x74.png 300w\" sizes=\"(max-width: 627px) 100vw, 627px\" \/><\/p>\n<p>Question 3.<br \/>\n223 + 10 = _____<br \/>\n223 + 100 = _____<br \/>\nAnswer:<br \/>\n223 + 10 = 233.<br \/>\n223 + 100 = 323.<\/p>\n<p>Explanation:<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-22535\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Book-2nd-Grade-Answer-Key-Chapter-9-add-Numbers-within-1000-Explore-Grow-18.png\" alt=\"\" width=\"666\" height=\"150\" srcset=\"https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Book-2nd-Grade-Answer-Key-Chapter-9-add-Numbers-within-1000-Explore-Grow-18.png 666w, https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Book-2nd-Grade-Answer-Key-Chapter-9-add-Numbers-within-1000-Explore-Grow-18-300x68.png 300w\" sizes=\"(max-width: 666px) 100vw, 666px\" \/><\/p>\n<p><img loading=\"lazy\" class=\"alignnone size-full wp-image-22548\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Book-2nd-Grade-Answer-Key-Chapter-9-add-Numbers-within-1000-show-Grow.-1.png\" alt=\"\" width=\"617\" height=\"129\" srcset=\"https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Book-2nd-Grade-Answer-Key-Chapter-9-add-Numbers-within-1000-show-Grow.-1.png 617w, https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Book-2nd-Grade-Answer-Key-Chapter-9-add-Numbers-within-1000-show-Grow.-1-300x63.png 300w\" sizes=\"(max-width: 617px) 100vw, 617px\" \/><\/p>\n<p>Question 4.<br \/>\n490 + 10 = ____<br \/>\n490 + 100 = _____<\/p>\n<p>Answer:<br \/>\n490 + 10 = 500.<br \/>\n490 + 100 = 590.<\/p>\n<p>Explanation:<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-22536\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Book-2nd-Grade-Answer-Key-Chapter-9-add-Numbers-within-1000-Explore-Grow-19.png\" alt=\"\" width=\"666\" height=\"150\" srcset=\"https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Book-2nd-Grade-Answer-Key-Chapter-9-add-Numbers-within-1000-Explore-Grow-19.png 666w, https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Book-2nd-Grade-Answer-Key-Chapter-9-add-Numbers-within-1000-Explore-Grow-19-300x68.png 300w\" sizes=\"(max-width: 666px) 100vw, 666px\" \/><br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-22549\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Book-2nd-Grade-Answer-Key-Chapter-9-add-Numbers-within-1000-show-Grow.-2.png\" alt=\"\" width=\"617\" height=\"129\" srcset=\"https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Book-2nd-Grade-Answer-Key-Chapter-9-add-Numbers-within-1000-show-Grow.-2.png 617w, https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Book-2nd-Grade-Answer-Key-Chapter-9-add-Numbers-within-1000-show-Grow.-2-300x63.png 300w\" sizes=\"(max-width: 617px) 100vw, 617px\" \/><\/p>\n<p><strong>Apply and Grow: Practice<\/strong><\/p>\n<p>Question 5.<br \/>\n731 + 10 = _____<br \/>\nAnswer:<br \/>\n731 + 10 = 741<\/p>\n<p>Explanation:<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-22537\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Book-2nd-Grade-Answer-Key-Chapter-9-add-Numbers-within-1000-Explore-Grow-20.png\" alt=\"\" width=\"666\" height=\"150\" srcset=\"https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Book-2nd-Grade-Answer-Key-Chapter-9-add-Numbers-within-1000-Explore-Grow-20.png 666w, https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Book-2nd-Grade-Answer-Key-Chapter-9-add-Numbers-within-1000-Explore-Grow-20-300x68.png 300w\" sizes=\"(max-width: 666px) 100vw, 666px\" \/><\/p>\n<p>Question 6.<br \/>\n674 + 100 = _____<br \/>\nAnswer:<br \/>\n674 + 100 = 774.<\/p>\n<p>Explanation:<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-22551\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Book-2nd-Grade-Answer-Key-Chapter-9-add-Numbers-within-1000-Apply-Grow-Practice-8.png\" alt=\"\" width=\"594\" height=\"124\" srcset=\"https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Book-2nd-Grade-Answer-Key-Chapter-9-add-Numbers-within-1000-Apply-Grow-Practice-8.png 594w, https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Book-2nd-Grade-Answer-Key-Chapter-9-add-Numbers-within-1000-Apply-Grow-Practice-8-300x63.png 300w\" sizes=\"(max-width: 594px) 100vw, 594px\" \/><\/p>\n<p>Question 7.<br \/>\n620 + 10 = ____<br \/>\nAnswer:<br \/>\n620 + 10 = 630.<\/p>\n<p>Explanation:<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-22538\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Book-2nd-Grade-Answer-Key-Chapter-9-add-Numbers-within-1000-Apply-Grow-Practice.png\" alt=\"\" width=\"631\" height=\"147\" srcset=\"https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Book-2nd-Grade-Answer-Key-Chapter-9-add-Numbers-within-1000-Apply-Grow-Practice.png 631w, https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Book-2nd-Grade-Answer-Key-Chapter-9-add-Numbers-within-1000-Apply-Grow-Practice-300x70.png 300w\" sizes=\"(max-width: 631px) 100vw, 631px\" \/><\/p>\n<p>Question 8.<br \/>\n713 + 10 = ____<br \/>\nAnswer:<br \/>\n713 + 10 = 723.<\/p>\n<p>Explanation:<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-22540\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Book-2nd-Grade-Answer-Key-Chapter-9-add-Numbers-within-1000-Apply-Grow-Practice-1.png\" alt=\"\" width=\"631\" height=\"147\" srcset=\"https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Book-2nd-Grade-Answer-Key-Chapter-9-add-Numbers-within-1000-Apply-Grow-Practice-1.png 631w, https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Book-2nd-Grade-Answer-Key-Chapter-9-add-Numbers-within-1000-Apply-Grow-Practice-1-300x70.png 300w\" sizes=\"(max-width: 631px) 100vw, 631px\" \/><\/p>\n<p>Question 9.<br \/>\n564 + 100 = _____<br \/>\nAnswer:<br \/>\n564 + 100 = 664.<\/p>\n<p>Explanation:<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-22553\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Book-2nd-Grade-Answer-Key-Chapter-9-add-Numbers-within-1000-Apply-Grow-Practice-9.png\" alt=\"\" width=\"594\" height=\"124\" srcset=\"https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Book-2nd-Grade-Answer-Key-Chapter-9-add-Numbers-within-1000-Apply-Grow-Practice-9.png 594w, https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Book-2nd-Grade-Answer-Key-Chapter-9-add-Numbers-within-1000-Apply-Grow-Practice-9-300x63.png 300w\" sizes=\"(max-width: 594px) 100vw, 594px\" \/><\/p>\n<p>Question 10.<br \/>\n349 + 10 = _____<br \/>\nAnswer:<br \/>\n349 + 10 = 359.<\/p>\n<p>Explanation:<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-22541\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Book-2nd-Grade-Answer-Key-Chapter-9-add-Numbers-within-1000-Apply-Grow-Practice-2.png\" alt=\"\" width=\"631\" height=\"147\" srcset=\"https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Book-2nd-Grade-Answer-Key-Chapter-9-add-Numbers-within-1000-Apply-Grow-Practice-2.png 631w, https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Book-2nd-Grade-Answer-Key-Chapter-9-add-Numbers-within-1000-Apply-Grow-Practice-2-300x70.png 300w\" sizes=\"(max-width: 631px) 100vw, 631px\" \/><\/p>\n<p>Question 11.<br \/>\n456 + 100 = ____<br \/>\nAnswer:<br \/>\n456 + 100 = 556.<\/p>\n<p>Explanation:<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-22554\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Book-2nd-Grade-Answer-Key-Chapter-9-add-Numbers-within-1000-Apply-Grow-Practice-10.png\" alt=\"\" width=\"594\" height=\"124\" srcset=\"https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Book-2nd-Grade-Answer-Key-Chapter-9-add-Numbers-within-1000-Apply-Grow-Practice-10.png 594w, https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Book-2nd-Grade-Answer-Key-Chapter-9-add-Numbers-within-1000-Apply-Grow-Practice-10-300x63.png 300w\" sizes=\"(max-width: 594px) 100vw, 594px\" \/><\/p>\n<p>Question 12.<br \/>\n802 + 100 = _____<br \/>\nAnswer:<br \/>\n802 + 100 = 902.<\/p>\n<p>Explanation:<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-22555\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Book-2nd-Grade-Answer-Key-Chapter-9-add-Numbers-within-1000-Apply-Grow-Practice-11.png\" alt=\"\" width=\"594\" height=\"124\" srcset=\"https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Book-2nd-Grade-Answer-Key-Chapter-9-add-Numbers-within-1000-Apply-Grow-Practice-11.png 594w, https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Book-2nd-Grade-Answer-Key-Chapter-9-add-Numbers-within-1000-Apply-Grow-Practice-11-300x63.png 300w\" sizes=\"(max-width: 594px) 100vw, 594px\" \/><\/p>\n<p>Question 13.<br \/>\n192 + 10 = ____<br \/>\nAnswer:<br \/>\n192 + 10 = 202.<\/p>\n<p>Explanation:<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-22542\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Book-2nd-Grade-Answer-Key-Chapter-9-add-Numbers-within-1000-Apply-Grow-Practice-3.png\" alt=\"\" width=\"631\" height=\"147\" srcset=\"https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Book-2nd-Grade-Answer-Key-Chapter-9-add-Numbers-within-1000-Apply-Grow-Practice-3.png 631w, https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Book-2nd-Grade-Answer-Key-Chapter-9-add-Numbers-within-1000-Apply-Grow-Practice-3-300x70.png 300w\" sizes=\"(max-width: 631px) 100vw, 631px\" \/><\/p>\n<p>Question 14.<br \/>\n900 + 100 = ____<br \/>\nAnswer:<br \/>\n900 + 100 = 1000.<\/p>\n<p>Explanation:<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-22556\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Book-2nd-Grade-Answer-Key-Chapter-9-add-Numbers-within-1000-Apply-Grow-Practice-12.png\" alt=\"\" width=\"594\" height=\"124\" srcset=\"https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Book-2nd-Grade-Answer-Key-Chapter-9-add-Numbers-within-1000-Apply-Grow-Practice-12.png 594w, https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Book-2nd-Grade-Answer-Key-Chapter-9-add-Numbers-within-1000-Apply-Grow-Practice-12-300x63.png 300w\" sizes=\"(max-width: 594px) 100vw, 594px\" \/><\/p>\n<p>Question 15.<br \/>\n349 + ____ = 449<br \/>\nAnswer:<br \/>\n349 + 100 = 449.<\/p>\n<p>Explanation:<br \/>\n349 + ??? = 449.<br \/>\n449 &#8211; 349 =???<br \/>\n100 = ???<br \/>\nHence, 349 + 100 = 449.<\/p>\n<p>Question 16.<br \/>\n____ + 10 = 791<br \/>\nAnswer:<br \/>\n781 + 10 = 791.<\/p>\n<p>Explanation:<br \/>\n??? + 10 = 791<br \/>\n791-10 = ???<br \/>\n781 = ???<br \/>\nHence, 781 + 10 = 791.<\/p>\n<p>Question 17.<br \/>\n<strong>Number Sense<\/strong><br \/>\nUse each number once to complete the equations.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-20783\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Answer-Key-Grade-2-Chapter-9-Add-Numbers-within-1000-9.1-2.png\" alt=\"Big Ideas Math Answer Key Grade 2 Chapter 9 Add Numbers within 1,000 9.1 2\" width=\"426\" height=\"72\" srcset=\"https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Answer-Key-Grade-2-Chapter-9-Add-Numbers-within-1000-9.1-2.png 426w, https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Answer-Key-Grade-2-Chapter-9-Add-Numbers-within-1000-9.1-2-300x51.png 300w\" sizes=\"(max-width: 426px) 100vw, 426px\" \/><br \/>\n____ + 10 = ____<br \/>\n_____ + _____ = 512<br \/>\nAnswer:<br \/>\n312 + 10 = 322<br \/>\n412 + 10 = 422<br \/>\n100 + 10 = 110<br \/>\n322 + 10 = 332<br \/>\n412 + 100 = 512<\/p>\n<p><strong>Think and Grow: Modeling Real Life<\/strong><\/p>\n<p>You and a friend play skee ball. Your score is 290. Your friend\u2019s score is 220. On the last roll, you score 10 more and your friend scores 100 more. Who wins?<br \/>\nAddition equations:<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-20784\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Answer-Key-Grade-2-Chapter-9-Add-Numbers-within-1000-9.1-3.png\" alt=\"Big Ideas Math Answer Key Grade 2 Chapter 9 Add Numbers within 1,000 9.1 3\" width=\"523\" height=\"154\" srcset=\"https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Answer-Key-Grade-2-Chapter-9-Add-Numbers-within-1000-9.1-3.png 523w, https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Answer-Key-Grade-2-Chapter-9-Add-Numbers-within-1000-9.1-3-300x88.png 300w\" sizes=\"(max-width: 523px) 100vw, 523px\" \/><br \/>\nYou Friend<br \/>\nAnswer:<br \/>\nGIVEN:<br \/>\nMy score = 290<br \/>\nFriends score = 220<br \/>\nIn the last roll,10 runs more my score<br \/>\n=&gt; 290+ 10 = 300.<br \/>\nIn the last roll,100 runs more my friend score<br \/>\n=&gt; 220 + 100 = 320.<br \/>\nDIFFERENCE:<br \/>\nMy friends score &#8211; My score=<br \/>\n320 &#8211; 300 = 20 runs.<br \/>\nCOMPARE:<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-21775\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Book-2nd-Grade-Answer-Key-Chapter-9-add-Numbers-within-1000-modeling-real-life.png\" alt=\"\" width=\"193\" height=\"85\" \/><br \/>\nHence, my friend wins the match by 20 runs.<\/p>\n<p><strong>Show and Grow<\/strong><\/p>\n<p>Question 18.<br \/>\nYou and a friend play a card game. Your score is 420. Your friend&#8217;s score is 530. In the last round, you score 100 more and your friend scores 10 more. Who wins?<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-20786\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Answer-Key-Grade-2-Chapter-9-Add-Numbers-within-1000-9.1-4.png\" alt=\"Big Ideas Math Answer Key Grade 2 Chapter 9 Add Numbers within 1,000 9.1 4\" width=\"140\" height=\"123\" \/><br \/>\nYou Friend<br \/>\nAnswer:<br \/>\nGIVEN:<br \/>\nMy score = 420<br \/>\nFriends score = 530<br \/>\nIn the last round ,100 runs more my score<br \/>\n=&gt; 420+ 100 = 520.<br \/>\nIn the last roll,10 runs more my friend score<br \/>\n=&gt; 530 + 10 = 540.<br \/>\nDIFFERENCE:<br \/>\nMy friends score &#8211; My score=<br \/>\n540 &#8211; 520 = 20 .<br \/>\nCOMPARE:<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-21776\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Book-2nd-Grade-Answer-Key-Chapter-9-add-Numbers-within-1000-modeling-real-life-1.png\" alt=\"\" width=\"192\" height=\"81\" \/><br \/>\nHence, my friend wins the match by 20.<\/p>\n<p>Question 19.<br \/>\nYou spin the wheel and score 100 points. Your friend scores 335. On the last spin, you score275 more and your friend scores 10 more. Who wins?<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-20787\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Answer-Key-Grade-2-Chapter-9-Add-Numbers-within-1000-9.1-5.png\" alt=\"Big Ideas Math Answer Key Grade 2 Chapter 9 Add Numbers within 1,000 9.1 5\" width=\"94\" height=\"124\" \/><br \/>\nYou Friend<br \/>\nAnswer:<br \/>\nGIVEN:<br \/>\nMy score = 100 points<br \/>\nFriends score = 335 points<br \/>\nIn the last spin ,275 runs more my score<br \/>\n=&gt; 100+ 275 = 375 points.<br \/>\nIn the last spin,10 runs more my friend score<br \/>\n=&gt; 335 + 10 = 345 points.<br \/>\nDIFFERENCE:<br \/>\nMy\u00a0 score &#8211; My\u00a0 friends score=<br \/>\n375 &#8211; 345 = 30 points.<br \/>\nCOMPARE:<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-21778\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Book-2nd-Grade-Answer-Key-Chapter-9-add-Numbers-within-1000-modeling-real-life-2.png\" alt=\"\" width=\"195\" height=\"76\" \/><br \/>\nHence, I win the match by 30points.<\/p>\n<h3><a id=\"Add_10_and_100_Homework_&amp;_Practice_9.1\"><\/a>Add 10 and 100 Homework &amp; Practice 9.1<\/h3>\n<p>Question 1.<br \/>\n850 + 100 = _____<br \/>\nAnswer:<br \/>\n850 +100 =950.<\/p>\n<p>Question 2.<br \/>\n625 + 10 = ____<br \/>\nAnswer:<br \/>\n625 + 10 = 635.<\/p>\n<p>Question 3.<br \/>\n704 + 10 = ____<br \/>\nAnswer:<br \/>\n704 + 10 = 714.<\/p>\n<p>Question 4.<br \/>\n294 + 100 = ____<br \/>\nAnswer:<br \/>\n294 + 100 = 394.<\/p>\n<p>Question 5.<br \/>\n556 + 100 = ____<br \/>\nAnswer:<br \/>\n556 + 100 = 656.<\/p>\n<p>Question 6.<br \/>\n471 + 100 = _____<br \/>\nAnswer:<br \/>\n471 + 100 =571.<\/p>\n<p>Question 7.<br \/>\n308 + 100 = ____<br \/>\nAnswer:<br \/>\n308 + 100 =408.<\/p>\n<p>Question 8.<br \/>\n149 + 10 = _____<br \/>\nAnswer:<br \/>\n149 + 10 =159.<\/p>\n<p>Question 9.<br \/>\n690 + 10 = ____<br \/>\nAnswer:<br \/>\n690 + 10 =700.<\/p>\n<p>Question 10.<br \/>\n990 + 10 = _____<br \/>\nAnswer:<br \/>\n990 + 10 =1000.<\/p>\n<p>Question 11.<br \/>\n621 + ____ = 631<br \/>\nAnswer:<br \/>\n621 + 10 = 631.<\/p>\n<p>Question 12.<br \/>\n____ + 100 = 613<br \/>\nAnswer:<br \/>\n513 + 100 = 613.<\/p>\n<p>Question 13.<br \/>\n<strong>YOU BE THE TEACHER<\/strong><br \/>\nYour friend says that 847 + 10 = 947. Is your friend correct? Explain.<br \/>\n_____________________________<br \/>\n_____________________________<br \/>\nAnswer:<br \/>\nYour friend says that 847 + 10 = 947.<br \/>\n847 + 10 = 857.<br \/>\nHence, my Friend is not correct because the total is 857 not 947.<\/p>\n<p>Question 14.<br \/>\n<strong>Modeling Real Life<\/strong><br \/>\nYou pick 220 blueberries. Your friend picks 200. You pick 10 more and your friend picks 100 more. Who picks more blueberries?<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-20788\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Answer-Key-Grade-2-Chapter-9-Add-Numbers-within-1000-9.1-6.png\" alt=\"Big Ideas Math Answer Key Grade 2 Chapter 9 Add Numbers within 1,000 9.1 6\" width=\"120\" height=\"69\" \/><br \/>\nYou Friend<br \/>\nAnswer:<br \/>\nGIVEN:<br \/>\nNumber of blueberries I picked up\u00a0 = 220<br \/>\nNumber of blueberries my friend picked up = 200<br \/>\n10 more Blueberries I picked up later<br \/>\nTotal number of blueberries I has =&gt; 220 + 10 = 230.<br \/>\n100 more Blueberries my Friend picked up later<br \/>\nTotal number of blueberries my friends has=&gt;200 + 100 =300.<br \/>\nDIFFERENCE:<br \/>\nTotal number of blueberries my friends has\u00a0 &#8211; Total number of blueberries I have<br \/>\n=&gt;300 &#8211; 230<br \/>\n=&gt; 70.<br \/>\nCOMPARE:<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-21783\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Book-2nd-Grade-Answer-Key-Chapter-9-add-Numbers-within-1000-modeling-real-life-3.png\" alt=\"\" width=\"212\" height=\"91\" \/><br \/>\nHence, my friend wins because he has 70 blueberries more than me.<\/p>\n<p>Question 15.<br \/>\n<strong>Modeling Real Life<\/strong><br \/>\nYou download 100 songs. Your friend downloads 125. Then you download 145 more and your friend downloads 10 more. Who downloads more songs?<br \/>\nYou Friend<br \/>\nAnswer:<br \/>\nGIVEN:<br \/>\nNumber of songs I downloaded = 100<br \/>\nNumber of songs my friend downloaded = 125<br \/>\nNumber of songs I downloaded more = 145<br \/>\nTotal number of songs I downloaded = 100 + 145 = 245.<br \/>\nNumber of songs my friend downloaded more = 10<br \/>\nTotal number of songs my friend downloaded = 125 + 10 = 135.<br \/>\nDIFFERENCE:<br \/>\nTotal number of songs I downloaded &#8211; Total number of songs my friend downloaded<br \/>\n= 245 &#8211; 135<br \/>\n= 110.<br \/>\nHence, I downloaded 110 songs more than my friend.<\/p>\n<p><strong>Review &amp; Refresh<\/strong><\/p>\n<p>Question 16.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-20789\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Answer-Key-Grade-2-Chapter-9-Add-Numbers-within-1000-9.1-7.png\" alt=\"Big Ideas Math Answer Key Grade 2 Chapter 9 Add Numbers within 1,000 9.1 7\" width=\"99\" height=\"91\" \/><br \/>\nAnswer:<br \/>\nDIFFERENCE:<br \/>\n56 &#8211; 8 = 48.<\/p>\n<p>Question 17.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-20790\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Answer-Key-Grade-2-Chapter-9-Add-Numbers-within-1000-9.1-8.png\" alt=\"Big Ideas Math Answer Key Grade 2 Chapter 9 Add Numbers within 1,000 9.1 8\" width=\"108\" height=\"90\" \/><br \/>\nAnswer:<br \/>\nDIFFERENCE:<br \/>\n73 &#8211; 5 = 68.<\/p>\n<p>Question 18.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-20791\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Answer-Key-Grade-2-Chapter-9-Add-Numbers-within-1000-9.1-9.png\" alt=\"Big Ideas Math Answer Key Grade 2 Chapter 9 Add Numbers within 1,000 9.1 9\" width=\"96\" height=\"87\" \/><br \/>\nAnswer:<br \/>\nDIFFERENCE:<br \/>\n41 &#8211; 26 = 15.<\/p>\n<h3><a id=\"Lesson_9.2_Use_a_Number_Line_to_Add_Hundreds_and_Tens\"><\/a>Lesson 9.2 Use a Number Line to Add Hundreds and Tens<\/h3>\n<p><strong>Explore and Grow<\/strong><\/p>\n<p>Show how to skip count by tens five times on the number line.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-20799\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Answers-2nd-Grade-Chapter-9-Add-Numbers-within-1000-9.2-1.png\" alt=\"Big Ideas Math Answers 2nd Grade Chapter 9 Add Numbers within 1,000 9.2 1\" width=\"533\" height=\"59\" srcset=\"https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Answers-2nd-Grade-Chapter-9-Add-Numbers-within-1000-9.2-1.png 533w, https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Answers-2nd-Grade-Chapter-9-Add-Numbers-within-1000-9.2-1-300x33.png 300w\" sizes=\"(max-width: 533px) 100vw, 533px\" \/><br \/>\n154 + _____ = ____<br \/>\nAnswer:<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-22526\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Book-2nd-Grade-Answer-Key-Chapter-9-add-Numbers-within-1000-Explore-Grow-10.png\" alt=\"\" width=\"759\" height=\"175\" srcset=\"https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Book-2nd-Grade-Answer-Key-Chapter-9-add-Numbers-within-1000-Explore-Grow-10.png 759w, https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Book-2nd-Grade-Answer-Key-Chapter-9-add-Numbers-within-1000-Explore-Grow-10-300x69.png 300w\" sizes=\"(max-width: 759px) 100vw, 759px\" \/><br \/>\nADDITION:<br \/>\n154 + 5(10)<br \/>\n=154 + 50<br \/>\n= 204.<br \/>\nHence, 154 + 50 = 204.<\/p>\n<p>Show how to skip count by hundreds five times on the number line.<br \/>\n1Q<br \/>\n154 + _____ = _____<br \/>\nAnswer:<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-22525\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Book-2nd-Grade-Answer-Key-Chapter-9-add-Numbers-within-1000-Explore-Grow-9.png\" alt=\"\" width=\"778\" height=\"220\" srcset=\"https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Book-2nd-Grade-Answer-Key-Chapter-9-add-Numbers-within-1000-Explore-Grow-9.png 778w, https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Book-2nd-Grade-Answer-Key-Chapter-9-add-Numbers-within-1000-Explore-Grow-9-300x85.png 300w, https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Book-2nd-Grade-Answer-Key-Chapter-9-add-Numbers-within-1000-Explore-Grow-9-768x217.png 768w\" sizes=\"(max-width: 778px) 100vw, 778px\" \/><br \/>\nADDITION:<br \/>\n154 + 5(100)<br \/>\n=154 + 500<br \/>\n= 654.<br \/>\nHence, 154 + 500 = 654.<\/p>\n<p><strong>Show and Grow<\/strong><\/p>\n<p>Question 1.<br \/>\n380 + 340 = ____<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-20801\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Answers-2nd-Grade-Chapter-9-Add-Numbers-within-1000-9.2-3.png\" alt=\"Big Ideas Math Answers 2nd Grade Chapter 9 Add Numbers within 1,000 9.2 3\" width=\"532\" height=\"56\" srcset=\"https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Answers-2nd-Grade-Chapter-9-Add-Numbers-within-1000-9.2-3.png 532w, https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Answers-2nd-Grade-Chapter-9-Add-Numbers-within-1000-9.2-3-300x32.png 300w\" sizes=\"(max-width: 532px) 100vw, 532px\" \/><br \/>\nAnswer:<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-22527\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Book-2nd-Grade-Answer-Key-Chapter-9-add-Numbers-within-1000-Explore-Grow-11.png\" alt=\"\" width=\"755\" height=\"197\" srcset=\"https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Book-2nd-Grade-Answer-Key-Chapter-9-add-Numbers-within-1000-Explore-Grow-11.png 755w, https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Book-2nd-Grade-Answer-Key-Chapter-9-add-Numbers-within-1000-Explore-Grow-11-300x78.png 300w\" sizes=\"(max-width: 755px) 100vw, 755px\" \/><br \/>\nADDITION:<br \/>\n380+ 3(100) +40<br \/>\n= 380 + 300 +40<br \/>\n=680 + 40<br \/>\n= 720.<br \/>\nHence, 380 + 340 = 720.<\/p>\n<p>Question 2.<br \/>\n462 + 270 = _____<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-20802\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Answers-2nd-Grade-Chapter-9-Add-Numbers-within-1000-9.2-4.png\" alt=\"Big Ideas Math Answers 2nd Grade Chapter 9 Add Numbers within 1,000 9.2 4\" width=\"518\" height=\"37\" srcset=\"https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Answers-2nd-Grade-Chapter-9-Add-Numbers-within-1000-9.2-4.png 518w, https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Answers-2nd-Grade-Chapter-9-Add-Numbers-within-1000-9.2-4-300x21.png 300w\" sizes=\"(max-width: 518px) 100vw, 518px\" \/><br \/>\nAnswer:<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-22518\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Book-2nd-Grade-Answer-Key-Chapter-9-add-Numbers-within-1000-Explore-Grow-4.png\" alt=\"\" width=\"683\" height=\"127\" srcset=\"https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Book-2nd-Grade-Answer-Key-Chapter-9-add-Numbers-within-1000-Explore-Grow-4.png 683w, https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Book-2nd-Grade-Answer-Key-Chapter-9-add-Numbers-within-1000-Explore-Grow-4-300x56.png 300w\" sizes=\"(max-width: 683px) 100vw, 683px\" \/><br \/>\nADDITION:<br \/>\n462 +2(100) + 70<br \/>\n=462 + 200 + 70<br \/>\n= 662 + 70<br \/>\n=732.<br \/>\nHence, 462 + 270 = 732.<\/p>\n<p><strong>Apply and Grow: Practice<\/strong><\/p>\n<p>Question 3.<br \/>\n550 + 210 = _____<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-20803\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Answers-2nd-Grade-Chapter-9-Add-Numbers-within-1000-9.2-5.png\" alt=\"Big Ideas Math Answers 2nd Grade Chapter 9 Add Numbers within 1,000 9.2 5\" width=\"529\" height=\"49\" srcset=\"https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Answers-2nd-Grade-Chapter-9-Add-Numbers-within-1000-9.2-5.png 529w, https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Answers-2nd-Grade-Chapter-9-Add-Numbers-within-1000-9.2-5-300x28.png 300w\" sizes=\"(max-width: 529px) 100vw, 529px\" \/><br \/>\nAnswer:<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-22519\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Book-2nd-Grade-Answer-Key-Chapter-9-add-Numbers-within-1000-Explore-Grow-5.png\" alt=\"\" width=\"679\" height=\"130\" srcset=\"https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Book-2nd-Grade-Answer-Key-Chapter-9-add-Numbers-within-1000-Explore-Grow-5.png 679w, https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Book-2nd-Grade-Answer-Key-Chapter-9-add-Numbers-within-1000-Explore-Grow-5-300x57.png 300w\" sizes=\"(max-width: 679px) 100vw, 679px\" \/><br \/>\nADDITION:<br \/>\n550 + 2(100) + 10<br \/>\n= 550 + 200 + 10<br \/>\n= 750 + 10<br \/>\n= 760.<br \/>\nHence, 550 + 210 = 760.<\/p>\n<p>Question 4.<br \/>\n725 + 160 = ____<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-20804\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Answers-2nd-Grade-Chapter-9-Add-Numbers-within-1000-9.2-6.png\" alt=\"Big Ideas Math Answers 2nd Grade Chapter 9 Add Numbers within 1,000 9.2 6\" width=\"536\" height=\"51\" srcset=\"https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Answers-2nd-Grade-Chapter-9-Add-Numbers-within-1000-9.2-6.png 536w, https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Answers-2nd-Grade-Chapter-9-Add-Numbers-within-1000-9.2-6-300x29.png 300w\" sizes=\"(max-width: 536px) 100vw, 536px\" \/><br \/>\nAnswer:<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-22520\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Book-2nd-Grade-Answer-Key-Chapter-9-add-Numbers-within-1000-Explore-Grow-6.png\" alt=\"\" width=\"528\" height=\"148\" srcset=\"https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Book-2nd-Grade-Answer-Key-Chapter-9-add-Numbers-within-1000-Explore-Grow-6.png 528w, https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Book-2nd-Grade-Answer-Key-Chapter-9-add-Numbers-within-1000-Explore-Grow-6-300x84.png 300w\" sizes=\"(max-width: 528px) 100vw, 528px\" \/><br \/>\nADDITION:<br \/>\n725 + 100 + 60<br \/>\n=825 + 60<br \/>\n=885.<br \/>\nHence, 725 + 160 = 885.<\/p>\n<p>Question 5.<br \/>\n469 + 350 = ____<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-20805\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Answers-2nd-Grade-Chapter-9-Add-Numbers-within-1000-9.2-7.png\" alt=\"Big Ideas Math Answers 2nd Grade Chapter 9 Add Numbers within 1,000 9.2 7\" width=\"525\" height=\"57\" srcset=\"https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Answers-2nd-Grade-Chapter-9-Add-Numbers-within-1000-9.2-7.png 525w, https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Answers-2nd-Grade-Chapter-9-Add-Numbers-within-1000-9.2-7-300x33.png 300w\" sizes=\"(max-width: 525px) 100vw, 525px\" \/><br \/>\nAnswer:<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-22517\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Book-2nd-Grade-Answer-Key-Chapter-9-add-Numbers-within-1000-Explore-Grow-3.png\" alt=\"\" width=\"683\" height=\"127\" srcset=\"https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Book-2nd-Grade-Answer-Key-Chapter-9-add-Numbers-within-1000-Explore-Grow-3.png 683w, https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Book-2nd-Grade-Answer-Key-Chapter-9-add-Numbers-within-1000-Explore-Grow-3-300x56.png 300w\" sizes=\"(max-width: 683px) 100vw, 683px\" \/><br \/>\nADDITION:<br \/>\n469 + 3( 100) + 50<br \/>\n= 469 + 300 +50<br \/>\n=769 + 50<br \/>\n=819.<br \/>\nHence, 469 + 350 = 819.<\/p>\n<p>Question 6.<br \/>\n<strong>Reasoning<\/strong><br \/>\nComplete the number line and the equation.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-20806\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Answers-2nd-Grade-Chapter-9-Add-Numbers-within-1000-9.2-8.png\" alt=\"Big Ideas Math Answers 2nd Grade Chapter 9 Add Numbers within 1,000 9.2 8\" width=\"360\" height=\"172\" srcset=\"https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Answers-2nd-Grade-Chapter-9-Add-Numbers-within-1000-9.2-8.png 360w, https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Answers-2nd-Grade-Chapter-9-Add-Numbers-within-1000-9.2-8-300x143.png 300w\" sizes=\"(max-width: 360px) 100vw, 360px\" \/><br \/>\n____ + ____ = _____<br \/>\nAnswer:<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-22528\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Book-2nd-Grade-Answer-Key-Chapter-9-add-Numbers-within-1000-Explore-Grow-12.png\" alt=\"\" width=\"510\" height=\"322\" srcset=\"https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Book-2nd-Grade-Answer-Key-Chapter-9-add-Numbers-within-1000-Explore-Grow-12.png 510w, https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Book-2nd-Grade-Answer-Key-Chapter-9-add-Numbers-within-1000-Explore-Grow-12-300x189.png 300w\" sizes=\"(max-width: 510px) 100vw, 510px\" \/><br \/>\nADDITION:<br \/>\n720 + 100 + 100<br \/>\n=820 + 100<br \/>\n=920.<br \/>\nSUBTRACTION:<br \/>\n960 -920 = 40<br \/>\nHence, 720 + 100 +100 +40 =960.<\/p>\n<p><strong>Think and Grow: Modeling Real Life<\/strong><\/p>\n<p>A post office has 330 large envelopes and some small envelopes. There are560 envelopes in all. How many small envelopes are there?<br \/>\nAddition equation:<br \/>\nModel:<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-20807\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Answers-2nd-Grade-Chapter-9-Add-Numbers-within-1000-9.2-9.png\" alt=\"Big Ideas Math Answers 2nd Grade Chapter 9 Add Numbers within 1,000 9.2 9\" width=\"525\" height=\"163\" srcset=\"https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Answers-2nd-Grade-Chapter-9-Add-Numbers-within-1000-9.2-9.png 525w, https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Answers-2nd-Grade-Chapter-9-Add-Numbers-within-1000-9.2-9-300x93.png 300w\" sizes=\"(max-width: 525px) 100vw, 525px\" \/><br \/>\n______ small envelopes<br \/>\nAnswer:<br \/>\nGIVEN:<br \/>\nNumber of large envelopes post office has = 330<br \/>\nTotal number of envelopes post office has = 560<br \/>\nNumber of small envelopes post office has = ???<br \/>\n=&gt; Total number of envelopes post office has\u00a0 &#8211; Number of large envelopes post office has<br \/>\n=&gt; 560 &#8211; 330 = 230.<\/p>\n<p><img loading=\"lazy\" class=\"alignnone size-full wp-image-22560\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Book-2nd-Grade-Answer-Key-Chapter-9-add-Numbers-within-1000-think-grow...png\" alt=\"\" width=\"729\" height=\"363\" srcset=\"https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Book-2nd-Grade-Answer-Key-Chapter-9-add-Numbers-within-1000-think-grow...png 729w, https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Book-2nd-Grade-Answer-Key-Chapter-9-add-Numbers-within-1000-think-grow..-300x149.png 300w\" sizes=\"(max-width: 729px) 100vw, 729px\" \/><\/p>\n<p>Hence, Number of small envelopes post office has = 230.<\/p>\n<p><strong>Show and Grow<\/strong><\/p>\n<p>Question 7.<br \/>\nA postal carrier delivers 280 letters and some post cards. She delivers 390 pieces of mail in all. How many postcards does she deliver?<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-20808\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Answers-2nd-Grade-Chapter-9-Add-Numbers-within-1000-9.2-10.png\" alt=\"Big Ideas Math Answers 2nd Grade Chapter 9 Add Numbers within 1,000 9.2 10\" width=\"89\" height=\"94\" \/><br \/>\n_____ postcards<br \/>\nAnswer:<br \/>\nGIVEN:<br \/>\nNumber of letters delivered by postal carrier = 280<br \/>\nTotal Number of pieces mails delivered by the postal carrier = 390<br \/>\nNumber of postcards delivered by the postal carrier = ???<br \/>\n=&gt;Total Number of pieces mails delivered by the postal carrier\u00a0 &#8211;\u00a0 Number of letters delivered by postal carrier<br \/>\n=&gt;\u00a0 390 &#8211; 280 = 110.<br \/>\nHence, the number of postcards delivered by the postal carrier = 110.<\/p>\n<p>Question 8.<br \/>\nThere are some children and 180 adults on a subway. There are 300 passengers in all. How many children are there?<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-20809\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Answers-2nd-Grade-Chapter-9-Add-Numbers-within-1000-9.2-11.png\" alt=\"Big Ideas Math Answers 2nd Grade Chapter 9 Add Numbers within 1,000 9.2 11\" width=\"140\" height=\"137\" \/><br \/>\n_____ children<br \/>\nAnswer:<br \/>\nGIVEN:<br \/>\nNumber of adults on the subway = 180<br \/>\nTotal number of passengers on the subway = 300<br \/>\nNumber of children on the subway = ???<br \/>\n=&gt; Total number of passengers on the subway &#8211; Number of adults on the subway<br \/>\n=&gt; 300 &#8211; 180<br \/>\n=&gt; 120.<br \/>\nHence, the Number of children on the subway = 120.<\/p>\n<h3><a id=\"Use_a_Number_Line_to_Add_Hundreds_and_Tens_Homework_&amp;_Practice_9.2\"><\/a>Use a Number Line to Add Hundreds and Tens Homework &amp; Practice 9.2<\/h3>\n<p>Question 1.<br \/>\n150 + 610 = _____<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-20810\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Answers-2nd-Grade-Chapter-9-Add-Numbers-within-1000-9.2-12.png\" alt=\"Big Ideas Math Answers 2nd Grade Chapter 9 Add Numbers within 1,000 9.2 12\" width=\"526\" height=\"64\" srcset=\"https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Answers-2nd-Grade-Chapter-9-Add-Numbers-within-1000-9.2-12.png 526w, https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Answers-2nd-Grade-Chapter-9-Add-Numbers-within-1000-9.2-12-300x37.png 300w\" sizes=\"(max-width: 526px) 100vw, 526px\" \/><br \/>\nAnswer:<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-23537\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Book-2nd-Grade-Answer-Key-Chapter-9-add-Numbers-within-1000-Practice-9.2-1.png\" alt=\"\" width=\"847\" height=\"187\" srcset=\"https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Book-2nd-Grade-Answer-Key-Chapter-9-add-Numbers-within-1000-Practice-9.2-1.png 847w, https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Book-2nd-Grade-Answer-Key-Chapter-9-add-Numbers-within-1000-Practice-9.2-1-300x66.png 300w, https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Book-2nd-Grade-Answer-Key-Chapter-9-add-Numbers-within-1000-Practice-9.2-1-768x170.png 768w\" sizes=\"(max-width: 847px) 100vw, 847px\" \/><\/p>\n<p>ADDITION:<br \/>\n150 + 6(100) + 10<br \/>\n=&gt; 150 +600 + 10<br \/>\n=&gt; 750 +10<br \/>\n=&gt;760.<br \/>\nHence, 150 + 610 = 760.<\/p>\n<p>Question 2.<br \/>\n291 + 450 = ____<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-20811\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Answers-2nd-Grade-Chapter-9-Add-Numbers-within-1000-9.2-13.png\" alt=\"Big Ideas Math Answers 2nd Grade Chapter 9 Add Numbers within 1,000 9.2 13\" width=\"539\" height=\"59\" srcset=\"https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Answers-2nd-Grade-Chapter-9-Add-Numbers-within-1000-9.2-13.png 539w, https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Answers-2nd-Grade-Chapter-9-Add-Numbers-within-1000-9.2-13-300x33.png 300w\" sizes=\"(max-width: 539px) 100vw, 539px\" \/><br \/>\nAnswer:<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-23551\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Book-2nd-Grade-Answer-Key-Chapter-9-add-Numbers-within-1000-Practice-9.2-2.png\" alt=\"\" width=\"815\" height=\"208\" srcset=\"https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Book-2nd-Grade-Answer-Key-Chapter-9-add-Numbers-within-1000-Practice-9.2-2.png 815w, https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Book-2nd-Grade-Answer-Key-Chapter-9-add-Numbers-within-1000-Practice-9.2-2-300x77.png 300w, https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Book-2nd-Grade-Answer-Key-Chapter-9-add-Numbers-within-1000-Practice-9.2-2-768x196.png 768w\" sizes=\"(max-width: 815px) 100vw, 815px\" \/><br \/>\nADDITION:<br \/>\n291 + 4(100) + 5(10)<br \/>\n=&gt; 291 + 400 +50<br \/>\n=&gt; 691 + 50<br \/>\n=&gt; 741.<br \/>\nHence, 291 + 450 = 741.<\/p>\n<p>Question 3.<br \/>\n553 + 250 = _____<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-20812\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Answers-2nd-Grade-Chapter-9-Add-Numbers-within-1000-9.2-14.png\" alt=\"Big Ideas Math Answers 2nd Grade Chapter 9 Add Numbers within 1,000 9.2 14\" width=\"539\" height=\"47\" srcset=\"https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Answers-2nd-Grade-Chapter-9-Add-Numbers-within-1000-9.2-14.png 539w, https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Answers-2nd-Grade-Chapter-9-Add-Numbers-within-1000-9.2-14-300x26.png 300w\" sizes=\"(max-width: 539px) 100vw, 539px\" \/><br \/>\nAnswer:<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-23552\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Book-2nd-Grade-Answer-Key-Chapter-9-add-Numbers-within-1000-Practice-9.2-3.png\" alt=\"\" width=\"914\" height=\"282\" srcset=\"https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Book-2nd-Grade-Answer-Key-Chapter-9-add-Numbers-within-1000-Practice-9.2-3.png 914w, https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Book-2nd-Grade-Answer-Key-Chapter-9-add-Numbers-within-1000-Practice-9.2-3-300x93.png 300w, https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Book-2nd-Grade-Answer-Key-Chapter-9-add-Numbers-within-1000-Practice-9.2-3-768x237.png 768w\" sizes=\"(max-width: 914px) 100vw, 914px\" \/><br \/>\nADDITION:<br \/>\n553 +2(100) +5(10)<br \/>\n=&gt;553 + 200 + 50<br \/>\n=&gt;753 + 50<br \/>\n=&gt;803.<br \/>\nHence, 553 + 250 = 803.<\/p>\n<p>Question 4.<br \/>\n<strong>Number Sense<\/strong><br \/>\nWrite the equation shown by the number line.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-20813\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Answers-2nd-Grade-Chapter-9-Add-Numbers-within-1000-9.2-15.png\" alt=\"Big Ideas Math Answers 2nd Grade Chapter 9 Add Numbers within 1,000 9.2 15\" width=\"488\" height=\"120\" srcset=\"https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Answers-2nd-Grade-Chapter-9-Add-Numbers-within-1000-9.2-15.png 488w, https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Answers-2nd-Grade-Chapter-9-Add-Numbers-within-1000-9.2-15-300x74.png 300w\" sizes=\"(max-width: 488px) 100vw, 488px\" \/><br \/>\n____ + ____ = ______<br \/>\nAnswer:<br \/>\nADDITION:<br \/>\n430 + 100\u00a0 +100\u00a0 +100 + 10 + 10<br \/>\n=&gt;530 +100+ 100 + 10 + 10<br \/>\n=&gt; 630 + 100 + 10 + 10<br \/>\n=&gt; 730 +\u00a0 10 + 10<br \/>\n=&gt; 740 + 10<br \/>\n=&gt; 750.<br \/>\nHence, 430 + 100\u00a0 +100\u00a0 +100 + 10 + 10 = 750.<\/p>\n<p>Question 5.<br \/>\n<strong>Modeling Real Life<\/strong><br \/>\nA carpenter has 320 nails and some screws. There are 470 nails and screws in all. How many screws are there?<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-20814\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Answers-2nd-Grade-Chapter-9-Add-Numbers-within-1000-9.2-16.png\" alt=\"Big Ideas Math Answers 2nd Grade Chapter 9 Add Numbers within 1,000 9.2 16\" width=\"59\" height=\"94\" \/><br \/>\n______ screws<br \/>\nAnswer:<br \/>\nGIVEN:<br \/>\nNumber of nails a carpenter has = 320<br \/>\nTotal number of nails and screws a carpenter has = 470<br \/>\nNumber of screws a carpenter has = ??<br \/>\nSUBTRACTION:<br \/>\nNumber of screws a carpenter has = Total number of nails and screws a carpenter has &#8211; Number of nails a carpenter has<br \/>\n= 470 &#8211;\u00a0320<br \/>\n=150.<br \/>\nHence, Number of screws a carpenter has = 150.<\/p>\n<p>Question 6.<br \/>\n<strong>Modeling Real Life<\/strong><br \/>\nA concession stand sells some drinks and 260 hot dogs. There were 400 drinks and hot dogs sold in all. How many drinks were sold?<br \/>\n______ drinks<br \/>\nAnswer:<br \/>\nGIVEN:<br \/>\nNumber of hot dogs a concession stand sells = 260<br \/>\nTotal number of drink a concession stand sold = 400<br \/>\nNumber of drinks sold = ??<br \/>\nSUBTRACTION:<br \/>\nNumber of drinks sold = Total number of drink a concession stand sold &#8211; Number of hot dogs a concession stand sells<br \/>\n= 400 &#8211;\u00a0260<br \/>\n= 140.<br \/>\nHence, Number of drinks sold = 140.<\/p>\n<p><strong>Review &amp; Refresh<\/strong><\/p>\n<p>Question 7.<br \/>\nShow 416 two ways.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-20815\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Answers-2nd-Grade-Chapter-9-Add-Numbers-within-1000-9.2-17.png\" alt=\"Big Ideas Math Answers 2nd Grade Chapter 9 Add Numbers within 1,000 9.2 17\" width=\"600\" height=\"107\" srcset=\"https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Answers-2nd-Grade-Chapter-9-Add-Numbers-within-1000-9.2-17.png 600w, https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Answers-2nd-Grade-Chapter-9-Add-Numbers-within-1000-9.2-17-300x54.png 300w\" sizes=\"(max-width: 600px) 100vw, 600px\" \/><br \/>\nAnswer:<br \/>\nONE WAY: TABLE WAY<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-23553\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Book-2nd-Grade-Answer-Key-Chapter-9-add-Numbers-within-1000-Practice-9.2-Review-Refresh.png\" alt=\"\" width=\"337\" height=\"200\" srcset=\"https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Book-2nd-Grade-Answer-Key-Chapter-9-add-Numbers-within-1000-Practice-9.2-Review-Refresh.png 337w, https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Book-2nd-Grade-Answer-Key-Chapter-9-add-Numbers-within-1000-Practice-9.2-Review-Refresh-300x178.png 300w\" sizes=\"(max-width: 337px) 100vw, 337px\" \/><br \/>\nADDITION:<br \/>\n=&gt; 4(100) + 1(10)\u00a0 + 6(1)<br \/>\n=&gt; 400 + 10 + 6<br \/>\n=&gt; 410 + 6<br \/>\n=&gt;416.<br \/>\nOTHER WAY: NUMBER LINE WAY<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-23554\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Book-2nd-Grade-Answer-Key-Chapter-9-add-Numbers-within-1000-Practice-9.2-Review-Refresh..png\" alt=\"\" width=\"945\" height=\"176\" srcset=\"https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Book-2nd-Grade-Answer-Key-Chapter-9-add-Numbers-within-1000-Practice-9.2-Review-Refresh..png 945w, https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Book-2nd-Grade-Answer-Key-Chapter-9-add-Numbers-within-1000-Practice-9.2-Review-Refresh.-300x56.png 300w, https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Book-2nd-Grade-Answer-Key-Chapter-9-add-Numbers-within-1000-Practice-9.2-Review-Refresh.-768x143.png 768w\" sizes=\"(max-width: 945px) 100vw, 945px\" \/><br \/>\nADDITION:<br \/>\n0+4(100) +1(10) + 6(1)<br \/>\n= 0 + 400 + 10 + 6<br \/>\n= 400 + 10 + 6<br \/>\n= 410 + 6<br \/>\n= 416.<\/p>\n<h3><a id=\"Lesson_9.3_Use_a_Number_Line_to_Add_Three-Digit_Numbers\"><\/a>Lesson 9.3 Use a Number Line to Add Three-Digit Numbers<\/h3>\n<p><strong>Explore and Grow<\/strong><\/p>\n<p>Use each sum as the missing addend in the next equation.<br \/>\n425 + 200 = ____<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-20816\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Answers-Grade-2-Chapter-9-Add-Numbers-within-1000-9.3-1.png\" alt=\"Big Ideas Math Answers Grade 2 Chapter 9 Add Numbers within 1,000 9.3 1\" width=\"540\" height=\"357\" srcset=\"https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Answers-Grade-2-Chapter-9-Add-Numbers-within-1000-9.3-1.png 540w, https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Answers-Grade-2-Chapter-9-Add-Numbers-within-1000-9.3-1-300x198.png 300w\" sizes=\"(max-width: 540px) 100vw, 540px\" \/><\/p>\n<p>How does this help you find 425 + 222?<br \/>\n___________________<br \/>\n____________________<br \/>\nAnswer:<br \/>\nGIVEN:<br \/>\nTo Find 425 + 222 = ???<br \/>\nADDITION:<br \/>\n425 + 200 = 625.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-23708\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Book-2nd-Grade-Answer-Key-Chapter-9-add-Numbers-within-1000-Practice-9.2-Add-Three-Digit-Numbers-Grow.png\" alt=\"\" width=\"1001\" height=\"204\" srcset=\"https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Book-2nd-Grade-Answer-Key-Chapter-9-add-Numbers-within-1000-Practice-9.2-Add-Three-Digit-Numbers-Grow.png 1001w, https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Book-2nd-Grade-Answer-Key-Chapter-9-add-Numbers-within-1000-Practice-9.2-Add-Three-Digit-Numbers-Grow-300x61.png 300w, https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Book-2nd-Grade-Answer-Key-Chapter-9-add-Numbers-within-1000-Practice-9.2-Add-Three-Digit-Numbers-Grow-768x157.png 768w\" sizes=\"(max-width: 1001px) 100vw, 1001px\" \/><br \/>\n625 + 20 = 645.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-23710\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Book-2nd-Grade-Answer-Key-Chapter-9-add-Numbers-within-1000-Practice-9.2-Add-Three-Digit-Numbers-Grow-1.png\" alt=\"\" width=\"1050\" height=\"183\" srcset=\"https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Book-2nd-Grade-Answer-Key-Chapter-9-add-Numbers-within-1000-Practice-9.2-Add-Three-Digit-Numbers-Grow-1.png 1050w, https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Book-2nd-Grade-Answer-Key-Chapter-9-add-Numbers-within-1000-Practice-9.2-Add-Three-Digit-Numbers-Grow-1-300x52.png 300w, https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Book-2nd-Grade-Answer-Key-Chapter-9-add-Numbers-within-1000-Practice-9.2-Add-Three-Digit-Numbers-Grow-1-1024x178.png 1024w, https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Book-2nd-Grade-Answer-Key-Chapter-9-add-Numbers-within-1000-Practice-9.2-Add-Three-Digit-Numbers-Grow-1-768x134.png 768w\" sizes=\"(max-width: 1050px) 100vw, 1050px\" \/><br \/>\n645 + 2 = 647.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-23711\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Book-2nd-Grade-Answer-Key-Chapter-9-add-Numbers-within-1000-Practice-9.2-Add-Three-Digit-Numbers-Grow-2.png\" alt=\"\" width=\"1000\" height=\"190\" srcset=\"https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Book-2nd-Grade-Answer-Key-Chapter-9-add-Numbers-within-1000-Practice-9.2-Add-Three-Digit-Numbers-Grow-2.png 1000w, https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Book-2nd-Grade-Answer-Key-Chapter-9-add-Numbers-within-1000-Practice-9.2-Add-Three-Digit-Numbers-Grow-2-300x57.png 300w, https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Book-2nd-Grade-Answer-Key-Chapter-9-add-Numbers-within-1000-Practice-9.2-Add-Three-Digit-Numbers-Grow-2-768x146.png 768w\" sizes=\"(max-width: 1000px) 100vw, 1000px\" \/><br \/>\nHence, 425 + 222 = 647.<\/p>\n<p><strong>Show and Grow<\/strong><\/p>\n<p>Question 1.<br \/>\n371 + 145 = ______<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-20817\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Answers-Grade-2-Chapter-9-Add-Numbers-within-1000-9.3-2.png\" alt=\"Big Ideas Math Answers Grade 2 Chapter 9 Add Numbers within 1,000 9.3 2\" width=\"534\" height=\"59\" srcset=\"https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Answers-Grade-2-Chapter-9-Add-Numbers-within-1000-9.3-2.png 534w, https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Answers-Grade-2-Chapter-9-Add-Numbers-within-1000-9.3-2-300x33.png 300w\" sizes=\"(max-width: 534px) 100vw, 534px\" \/><br \/>\nAnswer:<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-23714\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Book-2nd-Grade-Answer-Key-Chapter-9-add-Numbers-within-1000-Practice-9.2-Show-Grow.png\" alt=\"\" width=\"581\" height=\"221\" srcset=\"https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Book-2nd-Grade-Answer-Key-Chapter-9-add-Numbers-within-1000-Practice-9.2-Show-Grow.png 581w, https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Book-2nd-Grade-Answer-Key-Chapter-9-add-Numbers-within-1000-Practice-9.2-Show-Grow-300x114.png 300w\" sizes=\"(max-width: 581px) 100vw, 581px\" \/><br \/>\nADDITION:<br \/>\n371 + 100 +45<br \/>\n= 471 + 45<br \/>\n= 516.<br \/>\nHence, 371 + 145 = 516.<\/p>\n<p>Question 2.<br \/>\n419 + 237 = ______<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-20818\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Answers-Grade-2-Chapter-9-Add-Numbers-within-1000-9.3-3.png\" alt=\"Big Ideas Math Answers Grade 2 Chapter 9 Add Numbers within 1,000 9.3 3\" width=\"524\" height=\"47\" srcset=\"https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Answers-Grade-2-Chapter-9-Add-Numbers-within-1000-9.3-3.png 524w, https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Answers-Grade-2-Chapter-9-Add-Numbers-within-1000-9.3-3-300x27.png 300w\" sizes=\"(max-width: 524px) 100vw, 524px\" \/><br \/>\nAnswer:<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-23717\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Book-2nd-Grade-Answer-Key-Chapter-9-add-Numbers-within-1000-Practice-9.2-Show-Grow-1.png\" alt=\"\" width=\"849\" height=\"183\" srcset=\"https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Book-2nd-Grade-Answer-Key-Chapter-9-add-Numbers-within-1000-Practice-9.2-Show-Grow-1.png 849w, https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Book-2nd-Grade-Answer-Key-Chapter-9-add-Numbers-within-1000-Practice-9.2-Show-Grow-1-300x65.png 300w, https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Book-2nd-Grade-Answer-Key-Chapter-9-add-Numbers-within-1000-Practice-9.2-Show-Grow-1-768x166.png 768w\" sizes=\"(max-width: 849px) 100vw, 849px\" \/><\/p>\n<p>ADDITION:<br \/>\n419 + 100 + 100 + 37<br \/>\n=519 + 100 + 37<br \/>\n=619 +37<br \/>\n= 656.<br \/>\nHence, 419 + 237 = 656.<\/p>\n<p><strong>Apply and Grow: Practice<\/strong><\/p>\n<p>Question 3.<br \/>\n524 + 312 = _____<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-20819\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Answers-Grade-2-Chapter-9-Add-Numbers-within-1000-9.3-4.png\" alt=\"Big Ideas Math Answers Grade 2 Chapter 9 Add Numbers within 1,000 9.3 4\" width=\"516\" height=\"54\" srcset=\"https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Answers-Grade-2-Chapter-9-Add-Numbers-within-1000-9.3-4.png 516w, https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Answers-Grade-2-Chapter-9-Add-Numbers-within-1000-9.3-4-300x31.png 300w\" sizes=\"(max-width: 516px) 100vw, 516px\" \/><br \/>\nAnswer:<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-23724\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Book-2nd-Grade-Answer-Key-Chapter-9-add-Numbers-within-1000-Practice-9.2-Show-Grow-practice-3.png\" alt=\"\" width=\"809\" height=\"193\" srcset=\"https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Book-2nd-Grade-Answer-Key-Chapter-9-add-Numbers-within-1000-Practice-9.2-Show-Grow-practice-3.png 809w, https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Book-2nd-Grade-Answer-Key-Chapter-9-add-Numbers-within-1000-Practice-9.2-Show-Grow-practice-3-300x72.png 300w, https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Book-2nd-Grade-Answer-Key-Chapter-9-add-Numbers-within-1000-Practice-9.2-Show-Grow-practice-3-768x183.png 768w\" sizes=\"(max-width: 809px) 100vw, 809px\" \/><br \/>\nADDITION:<br \/>\n524 + 100 + 100 + 100 +12<br \/>\n= 624 + 100 + 100 +12<br \/>\n= 724 + 100 +12<br \/>\n= 824 + 12<br \/>\n= 836.<br \/>\nHence, 524 + 312 = 836.<\/p>\n<p>Question 4.<br \/>\n645 + 108 = ____<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-20820\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Answers-Grade-2-Chapter-9-Add-Numbers-within-1000-9.3-5.png\" alt=\"Big Ideas Math Answers Grade 2 Chapter 9 Add Numbers within 1,000 9.3 5\" width=\"534\" height=\"49\" srcset=\"https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Answers-Grade-2-Chapter-9-Add-Numbers-within-1000-9.3-5.png 534w, https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Answers-Grade-2-Chapter-9-Add-Numbers-within-1000-9.3-5-300x28.png 300w\" sizes=\"(max-width: 534px) 100vw, 534px\" \/><br \/>\nAnswer:<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-23729\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Book-2nd-Grade-Answer-Key-Chapter-9-add-Numbers-within-1000-Practice-9.2-Show-Grow-practice-4.png\" alt=\"\" width=\"547\" height=\"219\" srcset=\"https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Book-2nd-Grade-Answer-Key-Chapter-9-add-Numbers-within-1000-Practice-9.2-Show-Grow-practice-4.png 547w, https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Book-2nd-Grade-Answer-Key-Chapter-9-add-Numbers-within-1000-Practice-9.2-Show-Grow-practice-4-300x120.png 300w\" sizes=\"(max-width: 547px) 100vw, 547px\" \/><br \/>\nADDITION:<br \/>\n645 + 100 + 8<br \/>\n= 745 + 8<br \/>\n= 753.<br \/>\nHence, 645 + 108 = 753.<\/p>\n<p>Question 5.<br \/>\n836 + 74 = ____<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-20821\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Answers-Grade-2-Chapter-9-Add-Numbers-within-1000-9.3-6.png\" alt=\"Big Ideas Math Answers Grade 2 Chapter 9 Add Numbers within 1,000 9.3 6\" width=\"537\" height=\"56\" srcset=\"https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Answers-Grade-2-Chapter-9-Add-Numbers-within-1000-9.3-6.png 537w, https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Answers-Grade-2-Chapter-9-Add-Numbers-within-1000-9.3-6-300x31.png 300w\" sizes=\"(max-width: 537px) 100vw, 537px\" \/><br \/>\nAnswer:<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-23742\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Book-2nd-Grade-Answer-Key-Chapter-9-add-Numbers-within-1000-Practice-9.2-Show-Grow-practice-5.png\" alt=\"\" width=\"505\" height=\"180\" srcset=\"https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Book-2nd-Grade-Answer-Key-Chapter-9-add-Numbers-within-1000-Practice-9.2-Show-Grow-practice-5.png 505w, https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Book-2nd-Grade-Answer-Key-Chapter-9-add-Numbers-within-1000-Practice-9.2-Show-Grow-practice-5-300x107.png 300w\" sizes=\"(max-width: 505px) 100vw, 505px\" \/><\/p>\n<p>ADDITION:<br \/>\n836 + 74<br \/>\n= 910.<br \/>\nHence, 836 + 74 = 910.<\/p>\n<p>Question 6.<br \/>\n<strong>Number Sense<\/strong><br \/>\nWrite the equation shown by the number line.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-20822\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Answers-Grade-2-Chapter-9-Add-Numbers-within-1000-9.3-7.png\" alt=\"Big Ideas Math Answers Grade 2 Chapter 9 Add Numbers within 1,000 9.3 7\" width=\"415\" height=\"120\" srcset=\"https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Answers-Grade-2-Chapter-9-Add-Numbers-within-1000-9.3-7.png 415w, https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Answers-Grade-2-Chapter-9-Add-Numbers-within-1000-9.3-7-300x87.png 300w\" sizes=\"(max-width: 415px) 100vw, 415px\" \/><br \/>\n_____ + ______ = ______<br \/>\nAnswer:<br \/>\nEQUATION:<br \/>\n326+ 200 + 50 + 2<br \/>\n= 526 +\u00a0 50 + 2<br \/>\n= 576 + 2<br \/>\n=578.<br \/>\nHence, 326+ 200 + 50 + 2 = 578.<\/p>\n<p><strong>Think and Grow: Modeling Real Life<\/strong><\/p>\n<p>There are 289 boys and 323 girls running in a race. How many runners are there in all?<br \/>\nAddition equation:<br \/>\nModel:<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-20823\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Answers-Grade-2-Chapter-9-Add-Numbers-within-1000-9.3-8.png\" alt=\"Big Ideas Math Answers Grade 2 Chapter 9 Add Numbers within 1,000 9.3 8\" width=\"522\" height=\"170\" srcset=\"https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Answers-Grade-2-Chapter-9-Add-Numbers-within-1000-9.3-8.png 522w, https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Answers-Grade-2-Chapter-9-Add-Numbers-within-1000-9.3-8-300x98.png 300w\" sizes=\"(max-width: 522px) 100vw, 522px\" \/><br \/>\n_____ runners<br \/>\nAnswer:<br \/>\nNumber of boys running in the race = 289<br \/>\nNumber of girls running in the race = 323<br \/>\nTotal Number of runners in all = ???<br \/>\nADDITION:<br \/>\nTotal Number of runners in all = Number of boys running in the race &#8211; Number of girls running in the race<br \/>\n= 289 + 323<br \/>\n= 612.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-23864\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Book-2nd-Grade-Answer-Key-Chapter-9-add-Numbers-within-1000-Practice-9.2-Think-Grow-Modeling-Real-Life.png\" alt=\"\" width=\"787\" height=\"204\" srcset=\"https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Book-2nd-Grade-Answer-Key-Chapter-9-add-Numbers-within-1000-Practice-9.2-Think-Grow-Modeling-Real-Life.png 787w, https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Book-2nd-Grade-Answer-Key-Chapter-9-add-Numbers-within-1000-Practice-9.2-Think-Grow-Modeling-Real-Life-300x78.png 300w, https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Book-2nd-Grade-Answer-Key-Chapter-9-add-Numbers-within-1000-Practice-9.2-Think-Grow-Modeling-Real-Life-768x199.png 768w\" sizes=\"(max-width: 787px) 100vw, 787px\" \/><br \/>\nHence, Total Number of runners in all = 612.<\/p>\n<p><strong>Show and Grow<\/strong><\/p>\n<p>Question 7.<br \/>\nA textbook has 478 pages in Volume 1 and443 pages in Volume 2. How many pages are there in all?<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-20824\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Answers-Grade-2-Chapter-9-Add-Numbers-within-1000-9.3-9.png\" alt=\"Big Ideas Math Answers Grade 2 Chapter 9 Add Numbers within 1,000 9.3 9\" width=\"102\" height=\"102\" \/><br \/>\n_____ pages<br \/>\nAnswer:<br \/>\nTotal number of pages in the text book = 921.<br \/>\nNumber of pages in Volume 1 in the text book = 478<br \/>\nNumber of pages in Volume 2 in the text book = 443<br \/>\nTotal number of pages in the text book = ???<br \/>\nADDITION:<br \/>\nTotal number of pages in the text book = Number of pages in Volume 1 in the text book + Number of pages in Volume 2 in the text book<br \/>\n= 478 + 443<br \/>\n= 921.<br \/>\nHence, the total number of pages in the text book = 921.<\/p>\n<p>Question 8.<br \/>\n<strong>DIG DEEPER!<\/strong><br \/>\nThe pictures show your fitness tracker before and after you take a walk. How many steps did you take on your walk?<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-20825\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Answers-Grade-2-Chapter-9-Add-Numbers-within-1000-9.3-10.png\" alt=\"Big Ideas Math Answers Grade 2 Chapter 9 Add Numbers within 1,000 9.3 10\" width=\"154\" height=\"159\" \/><br \/>\n_____ steps<\/p>\n<p>Answer:<br \/>\nTotal number of steps taken in the walk = 1027.<\/p>\n<p>Explanation:<br \/>\nGIVEN:<br \/>\nNumber of steps took after = 132<br \/>\nNumber of steps took after = 895<br \/>\nTotal number of steps taken in the walk = ???<br \/>\nADDITION:<br \/>\nTotal number of steps taken in the walk = Number of steps took after + Number of steps took after<br \/>\n= 132 + 895<br \/>\n= 1027.<br \/>\nHence, Total number of steps taken in the walk = 1027.<\/p>\n<h3><a id=\"Use_a_Number_Line_to_Add_Three-Digit_Numbers_Homework_&amp;_Practice_9.3\"><\/a>Use a Number Line to Add Three-Digit Numbers Homework &amp; Practice 9.3<\/h3>\n<p>Question 1.<br \/>\n291 + 407 = _____<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-20826\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Answers-Grade-2-Chapter-9-Add-Numbers-within-1000-9.3-11.png\" alt=\"Big Ideas Math Answers Grade 2 Chapter 9 Add Numbers within 1,000 9.3 11\" width=\"529\" height=\"69\" srcset=\"https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Answers-Grade-2-Chapter-9-Add-Numbers-within-1000-9.3-11.png 529w, https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Answers-Grade-2-Chapter-9-Add-Numbers-within-1000-9.3-11-300x39.png 300w\" sizes=\"(max-width: 529px) 100vw, 529px\" \/><br \/>\nAnswer:<br \/>\n291 + 407 = 698.<\/p>\n<p>Explanation:<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-24267\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Book-2nd-Grade-Answer-Key-Chapter-9-add-Numbers-within-1000-Practice-9.3-Think-Grow-practice.png\" alt=\"\" width=\"1015\" height=\"213\" srcset=\"https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Book-2nd-Grade-Answer-Key-Chapter-9-add-Numbers-within-1000-Practice-9.3-Think-Grow-practice.png 1015w, https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Book-2nd-Grade-Answer-Key-Chapter-9-add-Numbers-within-1000-Practice-9.3-Think-Grow-practice-300x63.png 300w, https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Book-2nd-Grade-Answer-Key-Chapter-9-add-Numbers-within-1000-Practice-9.3-Think-Grow-practice-768x161.png 768w\" sizes=\"(max-width: 1015px) 100vw, 1015px\" \/><br \/>\nADDITION:<br \/>\n291 + 100 +100 + 100 + 100 + 7<br \/>\n= 391 + 100 + 100 + 100 + 7<br \/>\n= 491 + 100 + 100 + 7<br \/>\n= 591 + 100 + 7<br \/>\n= 691 + 7<br \/>\n= 698.<br \/>\nHence, 291 + 407 =698.<\/p>\n<p>Question 2.<br \/>\n752 + 138 = ____<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-20827\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Answers-Grade-2-Chapter-9-Add-Numbers-within-1000-9.3-12.png\" alt=\"Big Ideas Math Answers Grade 2 Chapter 9 Add Numbers within 1,000 9.3 12\" width=\"534\" height=\"51\" srcset=\"https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Answers-Grade-2-Chapter-9-Add-Numbers-within-1000-9.3-12.png 534w, https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Answers-Grade-2-Chapter-9-Add-Numbers-within-1000-9.3-12-300x29.png 300w\" sizes=\"(max-width: 534px) 100vw, 534px\" \/><br \/>\nAnswer:<br \/>\n752 + 138 = 890.<\/p>\n<p>Explanation:<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-24271\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Book-2nd-Grade-Answer-Key-Chapter-9-add-Numbers-within-1000-Practice-9.3-Think-Grow-practice.2.png\" alt=\"\" width=\"540\" height=\"173\" srcset=\"https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Book-2nd-Grade-Answer-Key-Chapter-9-add-Numbers-within-1000-Practice-9.3-Think-Grow-practice.2.png 540w, https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Book-2nd-Grade-Answer-Key-Chapter-9-add-Numbers-within-1000-Practice-9.3-Think-Grow-practice.2-300x96.png 300w\" sizes=\"(max-width: 540px) 100vw, 540px\" \/><br \/>\nADDITION:<br \/>\n752 + 100 + 38<br \/>\n= 852 + 38<br \/>\n= 890.<br \/>\nHence, 752 + 138 = 890.<\/p>\n<p>Question 3.<br \/>\n372 + 319 =_____<br \/>\n<span style=\"font-size: 16px; font-style: normal; font-weight: 400;\">\u00a0<\/span><img loading=\"lazy\" class=\"alignnone size-full wp-image-20828\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Answers-Grade-2-Chapter-9-Add-Numbers-within-1000-9.3-13.png\" alt=\"Big Ideas Math Answers Grade 2 Chapter 9 Add Numbers within 1,000 9.3 13\" width=\"512\" height=\"47\" srcset=\"https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Answers-Grade-2-Chapter-9-Add-Numbers-within-1000-9.3-13.png 512w, https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Answers-Grade-2-Chapter-9-Add-Numbers-within-1000-9.3-13-300x28.png 300w\" sizes=\"(max-width: 512px) 100vw, 512px\" \/><br \/>\nAnswer:<br \/>\n372 + 319 = 691.<\/p>\n<p>Explanation:<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-24275\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Book-2nd-Grade-Answer-Key-Chapter-9-add-Numbers-within-1000-Practice-9.3-Think-Grow-practice.3.png\" alt=\"\" width=\"1032\" height=\"198\" srcset=\"https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Book-2nd-Grade-Answer-Key-Chapter-9-add-Numbers-within-1000-Practice-9.3-Think-Grow-practice.3.png 1032w, https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Book-2nd-Grade-Answer-Key-Chapter-9-add-Numbers-within-1000-Practice-9.3-Think-Grow-practice.3-300x58.png 300w, https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Book-2nd-Grade-Answer-Key-Chapter-9-add-Numbers-within-1000-Practice-9.3-Think-Grow-practice.3-1024x196.png 1024w, https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Book-2nd-Grade-Answer-Key-Chapter-9-add-Numbers-within-1000-Practice-9.3-Think-Grow-practice.3-768x147.png 768w\" sizes=\"(max-width: 1032px) 100vw, 1032px\" \/><br \/>\nADDITION:<br \/>\n372 + 100 + 100 + 100 + 19<br \/>\n= 472 + 100 + 100 + 19<br \/>\n= 572\u00a0+ 100 + 19<br \/>\n= 672 + 19<br \/>\n= 691.<br \/>\nHence, 372 + 319 = 691.<\/p>\n<p>Question 4.<br \/>\n<strong>Structure<\/strong><br \/>\nUse the number lines to show 257 + 321 two ways.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-20829\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Answers-Grade-2-Chapter-9-Add-Numbers-within-1000-9.3-14.png\" alt=\"Big Ideas Math Answers Grade 2 Chapter 9 Add Numbers within 1,000 9.3 14\" width=\"530\" height=\"107\" srcset=\"https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Answers-Grade-2-Chapter-9-Add-Numbers-within-1000-9.3-14.png 530w, https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Answers-Grade-2-Chapter-9-Add-Numbers-within-1000-9.3-14-300x61.png 300w\" sizes=\"(max-width: 530px) 100vw, 530px\" \/><br \/>\n257 + 321 = _____<br \/>\nAnswer:<br \/>\n257 + 321 = 578.<\/p>\n<p>Explanation:<br \/>\nONE WAY: NUMBERLINE REPRESENTATION<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-24426\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Book-2nd-Grade-Answer-Key-Chapter-9-add-Numbers-within-1000-Practice-9.3-Think-Grow-practice.4.Structure.png\" alt=\"\" width=\"1008\" height=\"207\" srcset=\"https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Book-2nd-Grade-Answer-Key-Chapter-9-add-Numbers-within-1000-Practice-9.3-Think-Grow-practice.4.Structure.png 1008w, https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Book-2nd-Grade-Answer-Key-Chapter-9-add-Numbers-within-1000-Practice-9.3-Think-Grow-practice.4.Structure-300x62.png 300w, https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Book-2nd-Grade-Answer-Key-Chapter-9-add-Numbers-within-1000-Practice-9.3-Think-Grow-practice.4.Structure-768x158.png 768w\" sizes=\"(max-width: 1008px) 100vw, 1008px\" \/><br \/>\nOTHER WAY: EQUATION WAY REPRESENTATION:<br \/>\n257 + 100 + 100 + 100 + 21<br \/>\n= 357 + 100 + 100 + 21<br \/>\n= 457+ 100 + 21<br \/>\n= 557 + 21<br \/>\n= 578.<br \/>\nHence, 257 + 321 = 578.<\/p>\n<p>Question 5.<br \/>\n<strong>Modeling Real Life<\/strong><br \/>\nA florist has 416 daisies and152 roses. How many flowers are there in all?<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-20830\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Answers-Grade-2-Chapter-9-Add-Numbers-within-1000-9.3-15.png\" alt=\"Big Ideas Math Answers Grade 2 Chapter 9 Add Numbers within 1,000 9.3 15\" width=\"76\" height=\"132\" \/><br \/>\n______ \ufb02owers<br \/>\nAnswer:<br \/>\nTotal number of flowers a florist has = 568.<\/p>\n<p>GIVEN:<br \/>\nNumber of daisies a florist has = 416<br \/>\nNumber of roses a florist has = 152<br \/>\nTotal number of flowers a florist has = ???<\/p>\n<p>Explanation:<br \/>\nADDITION:<br \/>\nTotal number of flowers a florist has = Number of daisies a florist has<br \/>\nNumber of roses a florist has<br \/>\n= 416 + 152<br \/>\n= 568.<br \/>\nHence, Total number of flowers a florist has = 568.<\/p>\n<p>Question 6.<br \/>\n<strong>DIG DEEPER!<\/strong><br \/>\nA school has 872 students.139 students are in the second grade. How many students are not in second grade?<br \/>\n______ students<br \/>\nAnswer:<br \/>\nNumber of students not in second grade = 733.<\/p>\n<p>GIVEN:<br \/>\nTotal number of students present in school =872<br \/>\nNumber of students in second grade = 139<br \/>\nNumber of students not in second grade = ???<\/p>\n<p>Explanation:<br \/>\nSUBTRACTION:<br \/>\nNumber of students not in second grade = Total number of students present in school &#8211; Number of students in second grade<br \/>\n= 872 &#8211; 139<br \/>\n= 733.<br \/>\nHence, Number of students not in second grade = 733.<\/p>\n<p><strong>Review &amp; Refresh<\/strong><\/p>\n<p><strong>Draw more lines to show fourths.<\/strong><br \/>\nQuestion 7.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-20831\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Answers-Grade-2-Chapter-9-Add-Numbers-within-1000-9.3-16.png\" alt=\"Big Ideas Math Answers Grade 2 Chapter 9 Add Numbers within 1,000 9.3 16\" width=\"110\" height=\"114\" \/><br \/>\nAnswer:<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-24442\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Book-2nd-Grade-Answer-Key-Chapter-9-add-Numbers-within-1000-Practice-9.3-review-refresh-1.png\" alt=\"\" width=\"186\" height=\"194\" \/><\/p>\n<p>Explanation:<br \/>\n1\/4 of the figure is shaded.<\/p>\n<p>Question 8.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-20832\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Answers-Grade-2-Chapter-9-Add-Numbers-within-1000-9.3-17.png\" alt=\"Big Ideas Math Answers Grade 2 Chapter 9 Add Numbers within 1,000 9.3 17\" width=\"117\" height=\"118\" \/><br \/>\nAnswer:<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-24441\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Book-2nd-Grade-Answer-Key-Chapter-9-add-Numbers-within-1000-Practice-9.3-review-refresh.png\" alt=\"\" width=\"172\" height=\"164\" \/><\/p>\n<p>Explanation:<br \/>\n3\/4 of the figure is shaded.<\/p>\n<h3><a id=\"Lesson_9.4_Use_Compensation_to_Add_Three-Digit_Numbers\"><\/a>Lesson 9.4 Use Compensation to Add Three-Digit Numbers<\/h3>\n<p><strong>Explore and Grow<\/strong><\/p>\n<p>Add to the model to make 300. Make a quick sketch of your work.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-20833\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Solutions-Grade-2-Chapter-9-Add-Numbers-within-1000-9.4-1.png\" alt=\"Big Ideas Math Solutions Grade 2 Chapter 9 Add Numbers within 1,000 9.4 1\" width=\"271\" height=\"223\" \/><br \/>\nAnswer:<br \/>\nWhat number did you add to make 300? _____<br \/>\nHow can this help you find 296 + 124?<br \/>\n____________________<br \/>\n____________________<\/p>\n<p>GIVEN:<br \/>\nIn the figure given, the number count is 296.<br \/>\ngiven number = 300<br \/>\nwhat should be added to 296 to make 300?<br \/>\nSUBTRACTION:<br \/>\n300 &#8211; 296 = 4.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-25338\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Book-2nd-Grade-Answer-Key-Chapter-9-add-Numbers-within-1000-9.1-Show-and-Grow-1.png\" alt=\"\" width=\"374\" height=\"286\" srcset=\"https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Book-2nd-Grade-Answer-Key-Chapter-9-add-Numbers-within-1000-9.1-Show-and-Grow-1.png 374w, https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Book-2nd-Grade-Answer-Key-Chapter-9-add-Numbers-within-1000-9.1-Show-and-Grow-1-300x229.png 300w\" sizes=\"(max-width: 374px) 100vw, 374px\" \/><br \/>\nHence, 4 should b added to 296 to make it 300.<\/p>\n<p>This help in the calculating the sum easily .<br \/>\n296 + 124 = 420.<\/p>\n<p>&nbsp;<\/p>\n<p><strong>Show and Grow<\/strong><\/p>\n<p>Question 1.<br \/>\nUse compensation to add.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-20834\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Solutions-Grade-2-Chapter-9-Add-Numbers-within-1000-9.4-2.png\" alt=\"Big Ideas Math Solutions Grade 2 Chapter 9 Add Numbers within 1,000 9.4 2\" width=\"592\" height=\"148\" srcset=\"https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Solutions-Grade-2-Chapter-9-Add-Numbers-within-1000-9.4-2.png 592w, https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Solutions-Grade-2-Chapter-9-Add-Numbers-within-1000-9.4-2-300x75.png 300w\" sizes=\"(max-width: 592px) 100vw, 592px\" \/><br \/>\nAnswer:<br \/>\nGIVEN:<br \/>\n294 + 148 =??<br \/>\nAdd 6 to 294.<br \/>\nsubtract 6 from 148.<br \/>\n294 + 148<br \/>\n+6\u00a0 \u00a0 \u00a0 \u00a0 -6<br \/>\n300 + 142 = 442.<br \/>\nHence, 294 + 148 = 442.<\/p>\n<p><strong>Apply and Grow: Practice<\/strong><\/p>\n<p><strong>Use compensation to add.<\/strong><br \/>\nQuestion 2.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-20835\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Solutions-Grade-2-Chapter-9-Add-Numbers-within-1000-9.4-3.png\" alt=\"Big Ideas Math Solutions Grade 2 Chapter 9 Add Numbers within 1,000 9.4 3\" width=\"270\" height=\"262\" \/><br \/>\nAnswer:<br \/>\nGIVEN:<br \/>\n628 + 206 = ???<br \/>\nAdd 2 to 628<br \/>\nSubtract 2 from 206.<br \/>\n628\u00a0 +\u00a0 206<br \/>\n+\u00a0 2\u00a0 \u00a0 \u00a0 \u00a0 &#8211; 2<br \/>\n630\u00a0 +\u00a0 \u00a0204 = 834.<br \/>\nHence, 628 + 206 = 834.<\/p>\n<p>Question 3.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-20836\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Solutions-Grade-2-Chapter-9-Add-Numbers-within-1000-9.4-4.png\" alt=\"Big Ideas Math Solutions Grade 2 Chapter 9 Add Numbers within 1,000 9.4 4\" width=\"280\" height=\"258\" \/><br \/>\nAnswer:<br \/>\n703 + 145 =???<br \/>\nAdd 5 to 145.<br \/>\nSubtract 5 from 703.<br \/>\n703 + 145<br \/>\n&#8211;\u00a0 5\u00a0 \u00a0 \u00a0+ 5<br \/>\n698 +\u00a0 150 = 848.<br \/>\nHence, 703 + 145 = 848.<\/p>\n<p>Question 4.<br \/>\n490 + 367 = ?<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-20837\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Solutions-Grade-2-Chapter-9-Add-Numbers-within-1000-9.4-5.png\" alt=\"Big Ideas Math Solutions Grade 2 Chapter 9 Add Numbers within 1,000 9.4 5\" width=\"202\" height=\"55\" \/><br \/>\n____ + ____ = _____<br \/>\nAnswer:<br \/>\n490 + 367 =??<br \/>\nAdd 3 to 367.<br \/>\nSubtract 3 from 490.<br \/>\n490\u00a0 +\u00a0 367<br \/>\n&#8211;\u00a0 3\u00a0 \u00a0 \u00a0 \u00a0+ 3<br \/>\n487\u00a0 +\u00a0 370 = 857.<br \/>\nHence, 490 + 367 = 857.<\/p>\n<p>Question 5.<br \/>\n172 + 520 = ?<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-20838\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Solutions-Grade-2-Chapter-9-Add-Numbers-within-1000-9.4-6.png\" alt=\"Big Ideas Math Solutions Grade 2 Chapter 9 Add Numbers within 1,000 9.4 6\" width=\"206\" height=\"50\" \/><br \/>\n_____ + _____ = ______<br \/>\nAnswer:<br \/>\n172 + 520 =???<br \/>\nAdd 8 to 172.<br \/>\nSubtract 8 from 520.<br \/>\n172\u00a0 \u00a0+\u00a0 \u00a0 520<br \/>\n+ 8\u00a0 \u00a0 \u00a0 \u00a0 \u00a0&#8211;\u00a0 \u00a08<br \/>\n180\u00a0 \u00a0+\u00a0 \u00a0 512 =\u00a0 692.<br \/>\nHence, 172 + 520 = 692.<\/p>\n<p>Question 6.<br \/>\n614 + 275 = ______<br \/>\nAnswer:<br \/>\n614\u00a0 + 275 =???<br \/>\nAdd 6 to 614.<br \/>\nSubtract 6 from 275.<br \/>\n614\u00a0 \u00a0 +\u00a0 \u00a0275<br \/>\n+6\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0&#8211;\u00a0 6<br \/>\n620\u00a0 \u00a0 +\u00a0 \u00a0269 = 889.<br \/>\nHence,\u00a0 614 + 275 =889.<\/p>\n<p>Question 7.<br \/>\n308 + 549 = _____<br \/>\nAnswer:<br \/>\n308 + 549 = ???<br \/>\nAdd 2 to 308.<br \/>\nSubtract 2 from 549.<br \/>\n308\u00a0 \u00a0+\u00a0 \u00a0 549<br \/>\n+2\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 &#8211; 2<br \/>\n310\u00a0 \u00a0+\u00a0 \u00a0 547 = 857.<br \/>\nHence, 308 + 549 = 857.<\/p>\n<p>Question 8.<br \/>\n<strong>Reasoning<\/strong><br \/>\nShow two different ways to use compensation to find 406 + 113.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-20839\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Solutions-Grade-2-Chapter-9-Add-Numbers-within-1000-9.4-7.png\" alt=\"Big Ideas Math Solutions Grade 2 Chapter 9 Add Numbers within 1,000 9.4 7\" width=\"597\" height=\"143\" srcset=\"https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Solutions-Grade-2-Chapter-9-Add-Numbers-within-1000-9.4-7.png 597w, https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Solutions-Grade-2-Chapter-9-Add-Numbers-within-1000-9.4-7-300x72.png 300w\" sizes=\"(max-width: 597px) 100vw, 597px\" \/><br \/>\nAnswer:<br \/>\nONE WAY:<br \/>\n406 + 113 = ??<br \/>\nAdd 4 to 406.<br \/>\nSubtract 4 from 113.<br \/>\n406\u00a0 \u00a0 \u00a0+\u00a0 \u00a0 113<br \/>\n+ 4\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 &#8211;\u00a0 4<br \/>\n410\u00a0 \u00a0 \u00a0+\u00a0 \u00a0 109 = 519.<\/p>\n<p>OTHER WAY:<br \/>\n406 + 113 = ???<br \/>\nAdd 7 to 113.<br \/>\nSubtract 7 from 406.<br \/>\n406\u00a0 \u00a0 \u00a0+\u00a0 \u00a0 113<br \/>\n&#8211;\u00a0 7\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 + 7<br \/>\n399\u00a0 \u00a0+\u00a0 \u00a0 \u00a0 120 = 519.<br \/>\nHence, 399 + 120 = 519.<\/p>\n<p><strong>Think and Grow: Modeling Real Life<\/strong><\/p>\n<p>You want to raise $500 in 2 days. Do you reach your goal?<br \/>\nAddition equation:<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-20840\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Solutions-Grade-2-Chapter-9-Add-Numbers-within-1000-9.4-8.png\" alt=\"Big Ideas Math Solutions Grade 2 Chapter 9 Add Numbers within 1,000 9.4 8\" width=\"317\" height=\"173\" srcset=\"https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Solutions-Grade-2-Chapter-9-Add-Numbers-within-1000-9.4-8.png 317w, https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Solutions-Grade-2-Chapter-9-Add-Numbers-within-1000-9.4-8-300x164.png 300w\" sizes=\"(max-width: 317px) 100vw, 317px\" \/><br \/>\nYes\u00a0 \u00a0 \u00a0No<br \/>\nAnswer:<br \/>\nGIVEN:<br \/>\nYou want to raise $500 in 2 days.<br \/>\nAmount raised in day 1 = $283<br \/>\nAmount raised in day 2 = $205<br \/>\nADDITION:<br \/>\nTotal amount raised in day 1 and day 2 = $283 + $205 = $ 488.<br \/>\nSUBTRACTION:<br \/>\nAmount to be raised in two days = $500<br \/>\nDifference in amount = Amount to be raised in two days &#8211; Total amount raised in day 1 and day 2<br \/>\n= $500 &#8211; $488<br \/>\n= $2.<br \/>\nHence, more $2 required to reach the goal.<\/p>\n<p><strong>Show and Grow<\/strong><\/p>\n<p>Question 9.<br \/>\nA museum wants a weekend total of 700 guests. Does the museum reach the goal?<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-20841\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Solutions-Grade-2-Chapter-9-Add-Numbers-within-1000-9.4-9.png\" alt=\"Big Ideas Math Solutions Grade 2 Chapter 9 Add Numbers within 1,000 9.4 9\" width=\"312\" height=\"107\" srcset=\"https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Solutions-Grade-2-Chapter-9-Add-Numbers-within-1000-9.4-9.png 312w, https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Solutions-Grade-2-Chapter-9-Add-Numbers-within-1000-9.4-9-300x103.png 300w\" sizes=\"(max-width: 312px) 100vw, 312px\" \/><br \/>\nYes No<br \/>\nAnswer:<br \/>\nGIVEN:<br \/>\nTotal guests in the museum = 700<br \/>\nNumber of guests on Saturday = 338<br \/>\nNumber of guests on Sunday = 389<br \/>\nADDITION<br \/>\nTotal number of guests on Saturday and Sunday = 338 + 389 = 727<br \/>\nSUBTRACTION:<br \/>\nDifference in the guests total = Total number of guests on Saturday and Sunday &#8211; Total guests in the museum<br \/>\n= 727 &#8211; 700 = 27.<br \/>\nHence, the museum reaches the goal by 27 guests more.<\/p>\n<p>Question 10.<br \/>\n<strong>DIG DEEPER!<\/strong><br \/>\nYou want to score 400 in 3 bowling games. What score do you need in the third game to reach your goal?<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-20842\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Solutions-Grade-2-Chapter-9-Add-Numbers-within-1000-9.4-10.png\" alt=\"Big Ideas Math Solutions Grade 2 Chapter 9 Add Numbers within 1,000 9.4 10\" width=\"469\" height=\"147\" srcset=\"https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Solutions-Grade-2-Chapter-9-Add-Numbers-within-1000-9.4-10.png 469w, https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Solutions-Grade-2-Chapter-9-Add-Numbers-within-1000-9.4-10-300x94.png 300w\" sizes=\"(max-width: 469px) 100vw, 469px\" \/><br \/>\nAnswer:<br \/>\nScore to be needed\u00a0 in 3 bowling games = 400<br \/>\nScore in game 1 = 107<br \/>\nScore in game 2 = 144<br \/>\nADDITION:<br \/>\nTotal score in game 1 and game 2 = 107 + 144 = 251.<br \/>\nSUBTRACTION:<br \/>\nScore needed in the third game to reach your goal = score to be needed\u00a0 in 3 bowling games &#8211; Total score in game 1 and game 2<br \/>\n= 400 &#8211; 251<br \/>\n= 149.<br \/>\nHence, Score needed in the third game to reach your goal = 149.<\/p>\n<h3><a id=\"Use_Compensation_to_Add_Three-Digit_Numbers_Homework_&amp;_Practice_9.4\"><\/a>Use Compensation to Add Three-Digit Numbers Homework &amp; Practice 9.4<\/h3>\n<p><strong>Use compensation to add.<\/strong><br \/>\nQuestion 1.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-20843\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Solutions-Grade-2-Chapter-9-Add-Numbers-within-1000-9.4-11.png\" alt=\"Big Ideas Math Solutions Grade 2 Chapter 9 Add Numbers within 1,000 9.4 11\" width=\"294\" height=\"231\" \/><br \/>\nAnswer:<br \/>\n393 + 122 = ???<br \/>\nAdd 7 to 393.<br \/>\nSubtract 7 from 122.<br \/>\n393\u00a0 \u00a0+\u00a0 \u00a0122<br \/>\n+7\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 &#8211;\u00a0 7<br \/>\n400\u00a0 \u00a0 +\u00a0 115 = 515.<br \/>\nHence, 393 + 122 = 515.<\/p>\n<p>Question 2.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-20844\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Solutions-Grade-2-Chapter-9-Add-Numbers-within-1000-9.4-12.png\" alt=\"Big Ideas Math Solutions Grade 2 Chapter 9 Add Numbers within 1,000 9.4 12\" width=\"297\" height=\"267\" \/><br \/>\nAnswer:<br \/>\nGIVEN:<br \/>\n106 + 614 =???<br \/>\nAdd 4 to 106.<br \/>\nSubtract 4 from 614.<br \/>\n106\u00a0 \u00a0 \u00a0+\u00a0 \u00a0 614<br \/>\n+4\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 &#8211; 4<br \/>\n110\u00a0 \u00a0 \u00a0+\u00a0 \u00a0 610 = 720.<br \/>\nHence, 106 + 614 = 720.<\/p>\n<p>Question 3.<br \/>\n237 + 315 = ?<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-20845\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Solutions-Grade-2-Chapter-9-Add-Numbers-within-1000-9.4-13.png\" alt=\"Big Ideas Math Solutions Grade 2 Chapter 9 Add Numbers within 1,000 9.4 13\" width=\"198\" height=\"57\" \/><br \/>\n_____ + _____ = ______<br \/>\nAnswer:<br \/>\nGIVEN:<br \/>\n237 + 315 = ???<br \/>\nAdd 3 to 237<br \/>\nSubtract 3 from 315<br \/>\n237\u00a0 \u00a0+\u00a0 \u00a0315<br \/>\n+ 3\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 &#8211;\u00a0 3<br \/>\n240\u00a0 \u00a0+\u00a0 \u00a0312 = 552.<br \/>\nHence, 237 + 315 = 552.<\/p>\n<p>Question 4.<br \/>\n285 + 320 = ?<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-20846\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Solutions-Grade-2-Chapter-9-Add-Numbers-within-1000-9.4-14.png\" alt=\"Big Ideas Math Solutions Grade 2 Chapter 9 Add Numbers within 1,000 9.4 14\" width=\"204\" height=\"51\" \/><br \/>\n_____ + _____ = _____<br \/>\nAnswer:<br \/>\nGIVEN:<br \/>\n285\u00a0 +\u00a0 320 ==?<br \/>\nAdd 5 to 285<br \/>\nSubtract 5 from 320<br \/>\n285\u00a0 \u00a0+\u00a0 320<br \/>\n+ 5\u00a0 \u00a0 \u00a0 \u00a0 \u00a0&#8211; 5<br \/>\n290\u00a0 \u00a0+\u00a0 315 = 605.<br \/>\nHence, 285 + 320 = 605.<\/p>\n<p>Question 5.<br \/>\n<strong>YOU BE THE TEACHER<\/strong><br \/>\nYour friend uses compensation to find 550 + 298. Is your friend correct? Explain.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-20847\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Solutions-Grade-2-Chapter-9-Add-Numbers-within-1000-9.4-15.png\" alt=\"Big Ideas Math Solutions Grade 2 Chapter 9 Add Numbers within 1,000 9.4 15\" width=\"488\" height=\"146\" srcset=\"https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Solutions-Grade-2-Chapter-9-Add-Numbers-within-1000-9.4-15.png 488w, https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Solutions-Grade-2-Chapter-9-Add-Numbers-within-1000-9.4-15-300x90.png 300w\" sizes=\"(max-width: 488px) 100vw, 488px\" \/><br \/>\nAnswer:<br \/>\nGIVEN:<br \/>\n550 + 298 = 852<br \/>\n550\u00a0 \u00a0+\u00a0 298<br \/>\nAdd 2 to 298<br \/>\nSubtract 2 from 550<br \/>\n550\u00a0 \u00a0+\u00a0 \u00a0298<br \/>\n&#8211; 2\u00a0 \u00a0 \u00a0 \u00a0 \u00a0+\u00a0 2<br \/>\n552\u00a0 \u00a0+\u00a0 \u00a0300 = 852.<br \/>\nHence, my friend compensation is correct because 550 + 298 = 852.<\/p>\n<p>Question 6.<br \/>\n<strong>Modeling Real Life<\/strong><br \/>\nNewton wants to read 571 pages in two weeks. He reads 321 pages in the first week and196 pages in the second week. Does he reach his goal?<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-20848\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Solutions-Grade-2-Chapter-9-Add-Numbers-within-1000-9.4-16.png\" alt=\"Big Ideas Math Solutions Grade 2 Chapter 9 Add Numbers within 1,000 9.4 16\" width=\"101\" height=\"102\" \/><br \/>\nYes No<br \/>\nAnswer:<br \/>\nGIVEN:<br \/>\nTotal number pages newton wants to read in two weeks = 571<br \/>\nNumber of pages he read in first week = 321<br \/>\nNumber of pages he read in second week = 196<br \/>\nDid he reach his goal ??<br \/>\nADDITION:<br \/>\nTotal number of pages he read in first week and second week = 321 + 196 = 517<br \/>\nSUBTRACTION:<br \/>\nNumber of pages left for reading by newton =\u00a0 Total number pages newton wants to read in two weeks &#8211; Total number of pages he read in first week and second week<br \/>\n= 571 &#8211; 517<br \/>\n= 54.<br \/>\nHence ,No Newton did not reach his goal because he read only 517 pages out of 571 pages.<\/p>\n<p>Question 7.<br \/>\n<strong>DIG DEEPER!<\/strong><br \/>\nYou need 850 points to get to level 4 in a video game. How many points do you need in level 3to reach your goal?<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-20849\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Solutions-Grade-2-Chapter-9-Add-Numbers-within-1000-9.4-17.png\" alt=\"Big Ideas Math Solutions Grade 2 Chapter 9 Add Numbers within 1,000 9.4 17\" width=\"171\" height=\"111\" \/><br \/>\n______ points<br \/>\nAnswer:<br \/>\nGIVEN:<br \/>\nTotal points to go into level 4 in a video game = 850<br \/>\nScored points in level 1 = 348<br \/>\nScored points in level 2 = 297<br \/>\nNeeded points in level 3 =???<br \/>\nADDITION:<br \/>\nTotal points scored in both level 1 and level 2 in a video game = 348 +297 = 645.<br \/>\nSUBTRACTION:<br \/>\nNeeded points in level 3 = Total points to go into level 4 in a video game &#8211; Total points scored in both level 1 and level 2 in a video game<br \/>\n= 850 &#8211; 645<br \/>\n= 205.<br \/>\nHence, Needed points in level 3 = 205.<\/p>\n<p><strong>Review &amp; Refresh<\/strong><\/p>\n<p>Question 8.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-20850\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Solutions-Grade-2-Chapter-9-Add-Numbers-within-1000-9.4-18.png\" alt=\"Big Ideas Math Solutions Grade 2 Chapter 9 Add Numbers within 1,000 9.4 18\" width=\"103\" height=\"82\" \/><br \/>\nAnswer:<br \/>\nSUBTRACTION:<br \/>\n95 &#8211; 38 = 57.<br \/>\nHence, difference of 95 &#8211; 38 = 57.<\/p>\n<p>Question 9.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-20851\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Solutions-Grade-2-Chapter-9-Add-Numbers-within-1000-9.4-19.png\" alt=\"Big Ideas Math Solutions Grade 2 Chapter 9 Add Numbers within 1,000 9.4 19\" width=\"101\" height=\"81\" \/><br \/>\nAnswer:<br \/>\nSUBTRACTION:<br \/>\n82 &#8211; 40 = 42.<br \/>\nHence, difference of 82 &#8211; 40 = 42.<\/p>\n<p>Question 10.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-20852\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Solutions-Grade-2-Chapter-9-Add-Numbers-within-1000-9.4-20.png\" alt=\"Big Ideas Math Solutions Grade 2 Chapter 9 Add Numbers within 1,000 9.4 20\" width=\"97\" height=\"86\" \/><br \/>\nAnswer:<br \/>\nSUBTRACTION:<br \/>\n59 -21 =38.<br \/>\nHence, difference of 59 -21 = 38.<\/p>\n<h3><a id=\"Lesson_9.5_Use_Partial_Sums_to_Add_Three-Digit_Numbers\"><\/a>Lesson 9.5 Use Partial Sums to Add Three-Digit Numbers<\/h3>\n<p><strong>Explore and Grow<\/strong><\/p>\n<p>Model each number. Make quick sketches of your models. Then solve.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-20856\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Answer-Key-Grade-2-Chapter-9-Add-Numbers-within-1000-9.5-1.png\" alt=\"Big Ideas Math Answer Key Grade 2 Chapter 9 Add Numbers within 1,000 9.5 1\" width=\"578\" height=\"557\" srcset=\"https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Answer-Key-Grade-2-Chapter-9-Add-Numbers-within-1000-9.5-1.png 578w, https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Answer-Key-Grade-2-Chapter-9-Add-Numbers-within-1000-9.5-1-300x289.png 300w\" sizes=\"(max-width: 578px) 100vw, 578px\" \/><br \/>\n_____ + ____ = _____<br \/>\n324 + 215 = _____<br \/>\nAnswer:<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-25150\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Book-2nd-Grade-Answer-Key-Chapter-9-add-Numbers-within-1000-Lesson-9.5-Explore-and-Grow.png\" alt=\"\" width=\"901\" height=\"744\" srcset=\"https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Book-2nd-Grade-Answer-Key-Chapter-9-add-Numbers-within-1000-Lesson-9.5-Explore-and-Grow.png 901w, https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Book-2nd-Grade-Answer-Key-Chapter-9-add-Numbers-within-1000-Lesson-9.5-Explore-and-Grow-300x248.png 300w, https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Book-2nd-Grade-Answer-Key-Chapter-9-add-Numbers-within-1000-Lesson-9.5-Explore-and-Grow-768x634.png 768w\" sizes=\"(max-width: 901px) 100vw, 901px\" \/><br \/>\nHence, 324 + 215 = 539.<\/p>\n<p><strong>Show and Grow<\/strong><\/p>\n<p>Question 1.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-20857\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Answer-Key-Grade-2-Chapter-9-Add-Numbers-within-1000-9.5-2.png\" alt=\"Big Ideas Math Answer Key Grade 2 Chapter 9 Add Numbers within 1,000 9.5 2\" width=\"315\" height=\"251\" srcset=\"https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Answer-Key-Grade-2-Chapter-9-Add-Numbers-within-1000-9.5-2.png 315w, https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Answer-Key-Grade-2-Chapter-9-Add-Numbers-within-1000-9.5-2-300x239.png 300w\" sizes=\"(max-width: 315px) 100vw, 315px\" \/><br \/>\nAnswer:<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-25151\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Book-2nd-Grade-Answer-Key-Chapter-9-add-Numbers-within-1000-Lesson-9.5-Show-and-Grow.png\" alt=\"\" width=\"397\" height=\"309\" srcset=\"https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Book-2nd-Grade-Answer-Key-Chapter-9-add-Numbers-within-1000-Lesson-9.5-Show-and-Grow.png 397w, https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Book-2nd-Grade-Answer-Key-Chapter-9-add-Numbers-within-1000-Lesson-9.5-Show-and-Grow-300x234.png 300w\" sizes=\"(max-width: 397px) 100vw, 397px\" \/><br \/>\n236 + 359 = ???<br \/>\n236 + 359 = 695.<br \/>\nHence,\u00a0 Sum of 236 + 359 = 695.<\/p>\n<p>Question 2.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-20858\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Answer-Key-Grade-2-Chapter-9-Add-Numbers-within-1000-9.5-3.png\" alt=\"Big Ideas Math Answer Key Grade 2 Chapter 9 Add Numbers within 1,000 9.5 3\" width=\"322\" height=\"259\" srcset=\"https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Answer-Key-Grade-2-Chapter-9-Add-Numbers-within-1000-9.5-3.png 322w, https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Answer-Key-Grade-2-Chapter-9-Add-Numbers-within-1000-9.5-3-300x241.png 300w\" sizes=\"(max-width: 322px) 100vw, 322px\" \/><br \/>\nAnswer:<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-25152\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Book-2nd-Grade-Answer-Key-Chapter-9-add-Numbers-within-1000-Lesson-9.5-Show-and-Grow-1.png\" alt=\"\" width=\"380\" height=\"308\" srcset=\"https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Book-2nd-Grade-Answer-Key-Chapter-9-add-Numbers-within-1000-Lesson-9.5-Show-and-Grow-1.png 380w, https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Book-2nd-Grade-Answer-Key-Chapter-9-add-Numbers-within-1000-Lesson-9.5-Show-and-Grow-1-300x243.png 300w\" sizes=\"(max-width: 380px) 100vw, 380px\" \/><\/p>\n<p>582 + 173 =???<br \/>\n582 + 173 = 755.<br \/>\nHence, Sum of 582 + 173 = 755.<\/p>\n<p>Question 3.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-20859\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Answer-Key-Grade-2-Chapter-9-Add-Numbers-within-1000-9.5-4.png\" alt=\"Big Ideas Math Answer Key Grade 2 Chapter 9 Add Numbers within 1,000 9.5 4\" width=\"113\" height=\"97\" \/><br \/>\nAnswer:<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-25153\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Book-2nd-Grade-Answer-Key-Chapter-9-add-Numbers-within-1000-Lesson-9.5-Show-and-Grow-3.png\" alt=\"\" width=\"549\" height=\"402\" srcset=\"https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Book-2nd-Grade-Answer-Key-Chapter-9-add-Numbers-within-1000-Lesson-9.5-Show-and-Grow-3.png 549w, https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Book-2nd-Grade-Answer-Key-Chapter-9-add-Numbers-within-1000-Lesson-9.5-Show-and-Grow-3-300x220.png 300w\" sizes=\"(max-width: 549px) 100vw, 549px\" \/><br \/>\n364 + 432 = ???<br \/>\n364 + 432 = 796.<br \/>\nHence, Sum of 364 + 432 = 796.<\/p>\n<p>Question 4.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-20860\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Answer-Key-Grade-2-Chapter-9-Add-Numbers-within-1000-9.5-5.png\" alt=\"Big Ideas Math Answer Key Grade 2 Chapter 9 Add Numbers within 1,000 9.5 5\" width=\"102\" height=\"80\" \/><br \/>\nAnswer:<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-25154\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Book-2nd-Grade-Answer-Key-Chapter-9-add-Numbers-within-1000-Lesson-9.5-Show-and-Grow-4.png\" alt=\"\" width=\"378\" height=\"315\" srcset=\"https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Book-2nd-Grade-Answer-Key-Chapter-9-add-Numbers-within-1000-Lesson-9.5-Show-and-Grow-4.png 378w, https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Book-2nd-Grade-Answer-Key-Chapter-9-add-Numbers-within-1000-Lesson-9.5-Show-and-Grow-4-300x250.png 300w\" sizes=\"(max-width: 378px) 100vw, 378px\" \/><br \/>\n454\u00a0 + 488 = ???<br \/>\n454\u00a0 + 488 = 942.<br \/>\nHence, Sum of 454\u00a0 + 488 = 942.<\/p>\n<p>Question 5.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-20861\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Answer-Key-Grade-2-Chapter-9-Add-Numbers-within-1000-9.5-6.png\" alt=\"Big Ideas Math Answer Key Grade 2 Chapter 9 Add Numbers within 1,000 9.5 6\" width=\"106\" height=\"94\" \/><br \/>\nAnswer:<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-25158\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Book-2nd-Grade-Answer-Key-Chapter-9-add-Numbers-within-1000-Lesson-9.5-Show-and-Grow-5.png\" alt=\"\" width=\"432\" height=\"329\" srcset=\"https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Book-2nd-Grade-Answer-Key-Chapter-9-add-Numbers-within-1000-Lesson-9.5-Show-and-Grow-5.png 432w, https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Book-2nd-Grade-Answer-Key-Chapter-9-add-Numbers-within-1000-Lesson-9.5-Show-and-Grow-5-300x228.png 300w\" sizes=\"(max-width: 432px) 100vw, 432px\" \/><br \/>\n145 + 341 = ???<br \/>\n145 + 341 = 486.<br \/>\nHence, Sum of 145 + 341 = 486.<\/p>\n<p>Question 6.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-20862\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Answer-Key-Grade-2-Chapter-9-Add-Numbers-within-1000-9.5-7.png\" alt=\"Big Ideas Math Answer Key Grade 2 Chapter 9 Add Numbers within 1,000 9.5 7\" width=\"118\" height=\"87\" \/><br \/>\nAnswer:<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-25159\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Book-2nd-Grade-Answer-Key-Chapter-9-add-Numbers-within-1000-Lesson-9.5-Show-and-Grow-6.png\" alt=\"\" width=\"451\" height=\"351\" srcset=\"https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Book-2nd-Grade-Answer-Key-Chapter-9-add-Numbers-within-1000-Lesson-9.5-Show-and-Grow-6.png 451w, https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Book-2nd-Grade-Answer-Key-Chapter-9-add-Numbers-within-1000-Lesson-9.5-Show-and-Grow-6-300x233.png 300w\" sizes=\"(max-width: 451px) 100vw, 451px\" \/><br \/>\n576 + 248 = ???<br \/>\n576 + 248 = 824.<br \/>\nHence, Sum of 576 + 248 = 824.<\/p>\n<p><strong>Apply and Grow: Practice<\/strong><\/p>\n<p>Question 7.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-20863\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Answer-Key-Grade-2-Chapter-9-Add-Numbers-within-1000-9.5-8.png\" alt=\"Big Ideas Math Answer Key Grade 2 Chapter 9 Add Numbers within 1,000 9.5 8\" width=\"116\" height=\"89\" \/><br \/>\nAnswer:<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-25163\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Book-2nd-Grade-Answer-Key-Chapter-9-add-Numbers-within-1000-Lesson-9.5-Show-and-Grow-7.png\" alt=\"\" width=\"449\" height=\"347\" srcset=\"https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Book-2nd-Grade-Answer-Key-Chapter-9-add-Numbers-within-1000-Lesson-9.5-Show-and-Grow-7.png 449w, https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Book-2nd-Grade-Answer-Key-Chapter-9-add-Numbers-within-1000-Lesson-9.5-Show-and-Grow-7-300x232.png 300w\" sizes=\"(max-width: 449px) 100vw, 449px\" \/><br \/>\n217 + 435 =???<br \/>\n217 + 435 = 652.<br \/>\nHence, Sum of \u00a0217 + 435 = 652.<\/p>\n<p>Question 8.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-20864\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Answer-Key-Grade-2-Chapter-9-Add-Numbers-within-1000-9.5-9.png\" alt=\"Big Ideas Math Answer Key Grade 2 Chapter 9 Add Numbers within 1,000 9.5 9\" width=\"109\" height=\"97\" \/><br \/>\nAnswer:<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-25165\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Book-2nd-Grade-Answer-Key-Chapter-9-add-Numbers-within-1000-Lesson-9.5-Show-and-Grow-8.png\" alt=\"\" width=\"465\" height=\"352\" srcset=\"https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Book-2nd-Grade-Answer-Key-Chapter-9-add-Numbers-within-1000-Lesson-9.5-Show-and-Grow-8.png 465w, https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Book-2nd-Grade-Answer-Key-Chapter-9-add-Numbers-within-1000-Lesson-9.5-Show-and-Grow-8-300x227.png 300w\" sizes=\"(max-width: 465px) 100vw, 465px\" \/><br \/>\n532 + 129 = ???<br \/>\n532 + 129 = 661.<br \/>\nHence, sum of 532 + 129 = 661.<\/p>\n<p>Question 9.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-20865\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Answer-Key-Grade-2-Chapter-9-Add-Numbers-within-1000-9.5-10.png\" alt=\"Big Ideas Math Answer Key Grade 2 Chapter 9 Add Numbers within 1,000 9.5 10\" width=\"109\" height=\"102\" \/><br \/>\nAnswer:<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-25167\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Book-2nd-Grade-Answer-Key-Chapter-9-add-Numbers-within-1000-Lesson-9.5-Show-and-Grow-9.png\" alt=\"\" width=\"456\" height=\"332\" srcset=\"https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Book-2nd-Grade-Answer-Key-Chapter-9-add-Numbers-within-1000-Lesson-9.5-Show-and-Grow-9.png 456w, https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Book-2nd-Grade-Answer-Key-Chapter-9-add-Numbers-within-1000-Lesson-9.5-Show-and-Grow-9-300x218.png 300w\" sizes=\"(max-width: 456px) 100vw, 456px\" \/><br \/>\n651 + 237 = ???<br \/>\n651 + 237 = 888.<br \/>\nHence, Sum of 651 + 237 = 888.<\/p>\n<p>Question 10.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-20866\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Answer-Key-Grade-2-Chapter-9-Add-Numbers-within-1000-9.5-11.png\" alt=\"Big Ideas Math Answer Key Grade 2 Chapter 9 Add Numbers within 1,000 9.5 11\" width=\"114\" height=\"93\" \/><br \/>\nAnswer:<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-25169\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Book-2nd-Grade-Answer-Key-Chapter-9-add-Numbers-within-1000-Lesson-9.5-Show-and-Grow-9-1.png\" alt=\"\" width=\"428\" height=\"335\" srcset=\"https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Book-2nd-Grade-Answer-Key-Chapter-9-add-Numbers-within-1000-Lesson-9.5-Show-and-Grow-9-1.png 428w, https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Book-2nd-Grade-Answer-Key-Chapter-9-add-Numbers-within-1000-Lesson-9.5-Show-and-Grow-9-1-300x235.png 300w\" sizes=\"(max-width: 428px) 100vw, 428px\" \/><br \/>\n779 + 130 = ???<br \/>\n779 + 130 = 909.<br \/>\nHence, Sum of 779 + 130 = 909.<\/p>\n<p>Question 11.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-20867\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Answer-Key-Grade-2-Chapter-9-Add-Numbers-within-1000-9.5-12.png\" alt=\"Big Ideas Math Answer Key Grade 2 Chapter 9 Add Numbers within 1,000 9.5 12\" width=\"114\" height=\"92\" \/><br \/>\nAnswer:<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-25170\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Book-2nd-Grade-Answer-Key-Chapter-9-add-Numbers-within-1000-Lesson-9.5-Show-and-Grow-11.png\" alt=\"\" width=\"482\" height=\"357\" srcset=\"https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Book-2nd-Grade-Answer-Key-Chapter-9-add-Numbers-within-1000-Lesson-9.5-Show-and-Grow-11.png 482w, https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Book-2nd-Grade-Answer-Key-Chapter-9-add-Numbers-within-1000-Lesson-9.5-Show-and-Grow-11-300x222.png 300w\" sizes=\"(max-width: 482px) 100vw, 482px\" \/><br \/>\n362 + 217 = ???<br \/>\n362 + 217 = 579.<br \/>\nHence, Sum of 362 + 217 = 579.<\/p>\n<p>Question 12.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-20868\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Answer-Key-Grade-2-Chapter-9-Add-Numbers-within-1000-9.5-13.png\" alt=\"Big Ideas Math Answer Key Grade 2 Chapter 9 Add Numbers within 1,000 9.5 13\" width=\"109\" height=\"98\" \/><br \/>\nAnswer:<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-25172\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Book-2nd-Grade-Answer-Key-Chapter-9-add-Numbers-within-1000-Lesson-9.5-Show-and-Grow-12..png\" alt=\"\" width=\"427\" height=\"345\" srcset=\"https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Book-2nd-Grade-Answer-Key-Chapter-9-add-Numbers-within-1000-Lesson-9.5-Show-and-Grow-12..png 427w, https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Book-2nd-Grade-Answer-Key-Chapter-9-add-Numbers-within-1000-Lesson-9.5-Show-and-Grow-12.-300x242.png 300w\" sizes=\"(max-width: 427px) 100vw, 427px\" \/><br \/>\n806 + 115 = ???<br \/>\n806 + 115 = 921.<br \/>\nHence, Sum of 806 + 115 = 921.<\/p>\n<p>Question 13.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-20869\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Answer-Key-Grade-2-Chapter-9-Add-Numbers-within-1000-9.5-14.png\" alt=\"Big Ideas Math Answer Key Grade 2 Chapter 9 Add Numbers within 1,000 9.5 14\" width=\"108\" height=\"94\" \/><br \/>\nAnswer:<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-25173\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Book-2nd-Grade-Answer-Key-Chapter-9-add-Numbers-within-1000-Lesson-9.5-Show-and-Grow-13.png\" alt=\"\" width=\"434\" height=\"322\" srcset=\"https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Book-2nd-Grade-Answer-Key-Chapter-9-add-Numbers-within-1000-Lesson-9.5-Show-and-Grow-13.png 434w, https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Book-2nd-Grade-Answer-Key-Chapter-9-add-Numbers-within-1000-Lesson-9.5-Show-and-Grow-13-300x223.png 300w\" sizes=\"(max-width: 434px) 100vw, 434px\" \/><\/p>\n<p>448 + 312 = ???<br \/>\n448 + 312 = 760.<br \/>\nHence, Sum of 448 + 312 = 760.<\/p>\n<p>Question 14.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-20870\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Answer-Key-Grade-2-Chapter-9-Add-Numbers-within-1000-9.5-15.png\" alt=\"Big Ideas Math Answer Key Grade 2 Chapter 9 Add Numbers within 1,000 9.5 15\" width=\"108\" height=\"97\" \/><br \/>\nAnswer:<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-25176\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Book-2nd-Grade-Answer-Key-Chapter-9-add-Numbers-within-1000-Lesson-9.5-Show-and-Grow-14.png\" alt=\"\" width=\"422\" height=\"334\" srcset=\"https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Book-2nd-Grade-Answer-Key-Chapter-9-add-Numbers-within-1000-Lesson-9.5-Show-and-Grow-14.png 422w, https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Book-2nd-Grade-Answer-Key-Chapter-9-add-Numbers-within-1000-Lesson-9.5-Show-and-Grow-14-300x237.png 300w\" sizes=\"(max-width: 422px) 100vw, 422px\" \/><br \/>\n581 + 243 = ???<br \/>\n581 + 243 = 824.<br \/>\nHence, Sum of 581 + 243 = 824.<\/p>\n<p>Question 15.<br \/>\n<strong>Which One Doesn&#8217;t Belong?<\/strong><br \/>\nWhich expression does not belong with the other three?<br \/>\n200 + 300 + 50 + 20 + 5 + 6<br \/>\n581<br \/>\n500 + 70 + 11<br \/>\n500 + 80 + 5 + 6<br \/>\nAnswer:<br \/>\nExpression 1:<br \/>\n200 + 300 + 50 + 20 + 5 + 6<br \/>\n=500 + 50 + 20 + 5 + 6<br \/>\n= 550 + 20 + 5 + 6<br \/>\n= 570 + 5 + 6<br \/>\n= 575 + 6<br \/>\n= 581.<br \/>\nExpression 2:<br \/>\n581<br \/>\nExpression 3:<br \/>\n500 + 70 + 11<br \/>\n= 570 + 11<br \/>\n= 581.<br \/>\nExpression 4:<br \/>\n500 + 80 + 5 + 6<br \/>\n=580 + 5 +6<br \/>\n= 585 + 6<br \/>\n= 591.<br \/>\nHence, Expression 4 does not belong with the other three Expressions because the number given is not matching other three answers..<\/p>\n<p><strong>Think and Grow: Modeling Real Life<\/strong><\/p>\n<p>A video rental store has 348 fewer video games than movies. There are 116 video games. How many movies are there?<br \/>\nModel:<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-20872\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Answer-Key-Grade-2-Chapter-9-Add-Numbers-within-1000-9.5-16.png\" alt=\"Big Ideas Math Answer Key Grade 2 Chapter 9 Add Numbers within 1,000 9.5 16\" width=\"470\" height=\"259\" srcset=\"https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Answer-Key-Grade-2-Chapter-9-Add-Numbers-within-1000-9.5-16.png 470w, https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Answer-Key-Grade-2-Chapter-9-Add-Numbers-within-1000-9.5-16-300x165.png 300w\" sizes=\"(max-width: 470px) 100vw, 470px\" \/><br \/>\n_____ movies<br \/>\nAnswer:<br \/>\nGIVEN:<br \/>\nNumber of video games a\u00a0video rental store has= 116<br \/>\nLet the number of movies be X<br \/>\nDifference of video games and movies = 348<br \/>\nEQUATION:<br \/>\nX &#8211; 116 = 348<br \/>\n=&gt; X = 348 + 116<br \/>\n=&gt; X = 464.<\/p>\n<p><img loading=\"lazy\" class=\"alignnone size-full wp-image-25332\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Book-2nd-Grade-Answer-Key-Chapter-9-add-Numbers-within-1000-9.5-Think-and-Grow-Modeling-Real-Life-1.png\" alt=\"\" width=\"663\" height=\"423\" srcset=\"https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Book-2nd-Grade-Answer-Key-Chapter-9-add-Numbers-within-1000-9.5-Think-and-Grow-Modeling-Real-Life-1.png 663w, https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Book-2nd-Grade-Answer-Key-Chapter-9-add-Numbers-within-1000-9.5-Think-and-Grow-Modeling-Real-Life-1-300x191.png 300w\" sizes=\"(max-width: 663px) 100vw, 663px\" \/><br \/>\nHence, the number of movies rental store has = 464.<\/p>\n<p><strong>Show and Grow<\/strong><\/p>\n<p>Question 16.<br \/>\nA library has 477 fewer magazines than books. There are 243 magazines. How many books are there?<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-20873\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Answer-Key-Grade-2-Chapter-9-Add-Numbers-within-1000-9.5-17.png\" alt=\"Big Ideas Math Answer Key Grade 2 Chapter 9 Add Numbers within 1,000 9.5 17\" width=\"181\" height=\"79\" \/><br \/>\n____ books<br \/>\nAnswer:<br \/>\nGIVEN:<br \/>\nLet the number of books = X<br \/>\nNumber of magazines = 243<br \/>\nDifference of books and magazines = 477<br \/>\nEQUATION:<br \/>\n=&gt; X &#8211; 243 = 477<br \/>\n=&gt; X = 477 +243<br \/>\n=&gt; X = 720<br \/>\nHence, total number of books in the library = 720.<\/p>\n<p>Question 17.<br \/>\nA clothing store has some shirts on hangers. There are 214 shirts on shelves. The store has 356 shirts in all. How many shirts are on hangers?<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-20874\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Answer-Key-Grade-2-Chapter-9-Add-Numbers-within-1000-9.5-18.png\" alt=\"Big Ideas Math Answer Key Grade 2 Chapter 9 Add Numbers within 1,000 9.5 18\" width=\"141\" height=\"138\" \/><br \/>\n_____ shirts<br \/>\nAnswer:<br \/>\nNumber of shirts in all clothing store has = 356<br \/>\nNumber of shirts on shelves = 214<br \/>\nNumber of shirts on hangers = ???<br \/>\nSUBTRACTION:<br \/>\nNumber of shirts on hangers = Number of shirts in all clothing store has &#8211; Number of shirts on shelves<br \/>\n= 356 -214 = 142.<br \/>\nHence, Number of shirts on hangers = 142.<\/p>\n<h3><a id=\"Use_Partial_Sums_to_Add_Three-Digit_Numbers_Homework_&amp;_Practice_9.5\"><\/a>Use Partial Sums to Add Three-Digit Numbers Homework &amp; Practice 9.5<\/h3>\n<p>Question 1.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-20875\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Answer-Key-Grade-2-Chapter-9-Add-Numbers-within-1000-9.5-19.png\" alt=\"Big Ideas Math Answer Key Grade 2 Chapter 9 Add Numbers within 1,000 9.5 19\" width=\"318\" height=\"256\" srcset=\"https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Answer-Key-Grade-2-Chapter-9-Add-Numbers-within-1000-9.5-19.png 318w, https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Answer-Key-Grade-2-Chapter-9-Add-Numbers-within-1000-9.5-19-300x242.png 300w\" sizes=\"(max-width: 318px) 100vw, 318px\" \/><br \/>\nAnswer:<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-25234\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Book-2nd-Grade-Answer-Key-Chapter-9-add-Numbers-within-1000-Lesson-9.5-Homework-Practice-1.png\" alt=\"\" width=\"459\" height=\"341\" srcset=\"https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Book-2nd-Grade-Answer-Key-Chapter-9-add-Numbers-within-1000-Lesson-9.5-Homework-Practice-1.png 459w, https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Book-2nd-Grade-Answer-Key-Chapter-9-add-Numbers-within-1000-Lesson-9.5-Homework-Practice-1-300x223.png 300w\" sizes=\"(max-width: 459px) 100vw, 459px\" \/><br \/>\nADDITION:<br \/>\n442 + 215 = 657.<br \/>\nHence, Sum of 442 + 215 = 657.<\/p>\n<p>Question 2.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-20876\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Answer-Key-Grade-2-Chapter-9-Add-Numbers-within-1000-9.5-20.png\" alt=\"Big Ideas Math Answer Key Grade 2 Chapter 9 Add Numbers within 1,000 9.5 20\" width=\"318\" height=\"251\" srcset=\"https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Answer-Key-Grade-2-Chapter-9-Add-Numbers-within-1000-9.5-20.png 318w, https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Answer-Key-Grade-2-Chapter-9-Add-Numbers-within-1000-9.5-20-300x237.png 300w\" sizes=\"(max-width: 318px) 100vw, 318px\" \/><br \/>\nAnswer:<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-25236\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Book-2nd-Grade-Answer-Key-Chapter-9-add-Numbers-within-1000-Lesson-9.5-Homework-Practice-2.png\" alt=\"\" width=\"422\" height=\"329\" srcset=\"https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Book-2nd-Grade-Answer-Key-Chapter-9-add-Numbers-within-1000-Lesson-9.5-Homework-Practice-2.png 422w, https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Book-2nd-Grade-Answer-Key-Chapter-9-add-Numbers-within-1000-Lesson-9.5-Homework-Practice-2-300x234.png 300w\" sizes=\"(max-width: 422px) 100vw, 422px\" \/><br \/>\nADDITION:<br \/>\n336 +465 = 801.<br \/>\nHence, Sum of 336 +465 = 801.<\/p>\n<p>Question 3.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-20877\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Answer-Key-Grade-2-Chapter-9-Add-Numbers-within-1000-9.5-21.png\" alt=\"Big Ideas Math Answer Key Grade 2 Chapter 9 Add Numbers within 1,000 9.5 21\" width=\"111\" height=\"100\" \/><br \/>\nAnswer:<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-25237\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Book-2nd-Grade-Answer-Key-Chapter-9-add-Numbers-within-1000-Lesson-9.5-Homework-Practice-3.png\" alt=\"\" width=\"463\" height=\"355\" srcset=\"https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Book-2nd-Grade-Answer-Key-Chapter-9-add-Numbers-within-1000-Lesson-9.5-Homework-Practice-3.png 463w, https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Book-2nd-Grade-Answer-Key-Chapter-9-add-Numbers-within-1000-Lesson-9.5-Homework-Practice-3-300x230.png 300w\" sizes=\"(max-width: 463px) 100vw, 463px\" \/><br \/>\nADDITION:<br \/>\n451 + 401 = 852.<br \/>\nHence, Sum of 451 + 401 = 852.<\/p>\n<p>Question 4.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-20878\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Answer-Key-Grade-2-Chapter-9-Add-Numbers-within-1000-9.5-22.png\" alt=\"Big Ideas Math Answer Key Grade 2 Chapter 9 Add Numbers within 1,000 9.5 22\" width=\"109\" height=\"90\" \/><br \/>\nAnswer:<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-25238\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Book-2nd-Grade-Answer-Key-Chapter-9-add-Numbers-within-1000-Lesson-9.5-Homework-Practice-4.png\" alt=\"\" width=\"457\" height=\"351\" srcset=\"https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Book-2nd-Grade-Answer-Key-Chapter-9-add-Numbers-within-1000-Lesson-9.5-Homework-Practice-4.png 457w, https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Book-2nd-Grade-Answer-Key-Chapter-9-add-Numbers-within-1000-Lesson-9.5-Homework-Practice-4-300x230.png 300w\" sizes=\"(max-width: 457px) 100vw, 457px\" \/><br \/>\nADDITION:<br \/>\n371 +248 = 619.<br \/>\nHence, Sum of 371 +248 = 619.<\/p>\n<p>Question 5.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-20879\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Answer-Key-Grade-2-Chapter-9-Add-Numbers-within-1000-9.5-23.png\" alt=\"Big Ideas Math Answer Key Grade 2 Chapter 9 Add Numbers within 1,000 9.5 23\" width=\"116\" height=\"84\" \/><br \/>\nAnswer:<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-25242\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Book-2nd-Grade-Answer-Key-Chapter-9-add-Numbers-within-1000-Lesson-9.5-Homework-Practice-5.png\" alt=\"\" width=\"468\" height=\"355\" srcset=\"https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Book-2nd-Grade-Answer-Key-Chapter-9-add-Numbers-within-1000-Lesson-9.5-Homework-Practice-5.png 468w, https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Book-2nd-Grade-Answer-Key-Chapter-9-add-Numbers-within-1000-Lesson-9.5-Homework-Practice-5-300x228.png 300w\" sizes=\"(max-width: 468px) 100vw, 468px\" \/><br \/>\nADDITION:<br \/>\n672 + 283 = 955.<br \/>\nHence, Sum of 672 + 283 = 955.<\/p>\n<p>Question 6.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-20880\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Answer-Key-Grade-2-Chapter-9-Add-Numbers-within-1000-9.5-24.png\" alt=\"Big Ideas Math Answer Key Grade 2 Chapter 9 Add Numbers within 1,000 9.5 24\" width=\"118\" height=\"85\" \/><br \/>\nAnswer:<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-25243\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Book-2nd-Grade-Answer-Key-Chapter-9-add-Numbers-within-1000-Lesson-9.5-Homework-Practice-6.png\" alt=\"\" width=\"474\" height=\"355\" srcset=\"https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Book-2nd-Grade-Answer-Key-Chapter-9-add-Numbers-within-1000-Lesson-9.5-Homework-Practice-6.png 474w, https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Book-2nd-Grade-Answer-Key-Chapter-9-add-Numbers-within-1000-Lesson-9.5-Homework-Practice-6-300x225.png 300w\" sizes=\"(max-width: 474px) 100vw, 474px\" \/><br \/>\nADDITION:<br \/>\n527 + 106 = 633.<br \/>\nHence, Sum of 527 + 106 = 633.<\/p>\n<p>Question 7.<br \/>\n<strong>DIG DEEPER!<\/strong><br \/>\nFind the missing digits. Then find the sum.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-20881\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Answer-Key-Grade-2-Chapter-9-Add-Numbers-within-1000-9.5-25.png\" alt=\"Big Ideas Math Answer Key Grade 2 Chapter 9 Add Numbers within 1,000 9.5 25\" width=\"489\" height=\"253\" srcset=\"https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Answer-Key-Grade-2-Chapter-9-Add-Numbers-within-1000-9.5-25.png 489w, https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Answer-Key-Grade-2-Chapter-9-Add-Numbers-within-1000-9.5-25-300x155.png 300w\" sizes=\"(max-width: 489px) 100vw, 489px\" \/><br \/>\nAnswer:<br \/>\nGIVEN:<br \/>\nHundreds = 7<br \/>\nTens = 0<br \/>\nOnes = 8<br \/>\nEXPLANATION:<br \/>\n&#8212; 4\u00a0 5<br \/>\n+ 3 &#8212;\u00a0 3<br \/>\n= 7\u00a0 0\u00a0 8<br \/>\n4 + 6 = 10<br \/>\n1 + 3 + 3 =7<br \/>\nMISSING NUMBERS ARE :<br \/>\nHundreds place = 3<br \/>\ntens place = 6<br \/>\nADDITION: 345 + 363 = 708.<br \/>\nHence, missing numbers are 3 and 6.<\/p>\n<p>Question 8.<br \/>\n<strong>Modeling Real Life<\/strong><br \/>\nThere are 180 fewer muffins than rolls. There are 425 muffins. How many rolls are there?<br \/>\n______ rolls<br \/>\nAnswer:<br \/>\nTotal number of muffins = 425<br \/>\nLet the number of rolls be X<br \/>\nDifference\u00a0 in the muffins and rolls = 180<br \/>\nEQUATION:<br \/>\nX &#8211; 180 = 425<br \/>\n=&gt; X = 425 &#8211; 180<br \/>\n=&gt; X = 245<br \/>\nHence, the number of rolls = 245.<\/p>\n<p>Question 9.<br \/>\n<strong>Modeling Real Life<\/strong><br \/>\nA truck driver drives 672 miles on Monday. He drives some more miles on Tuesday. He drives 954 miles in all. How many miles did he drive on Tuesday?<br \/>\n_____ miles<br \/>\nAnswer:<br \/>\nGIVEN:<br \/>\nNumber of miles driver drove on Monday = 672<br \/>\nNumber of miles driver drove in all = 954<br \/>\nNumber of miles driver drove on Tuesday = ???<br \/>\nSUBTRACTION:<br \/>\nNumber of miles driver drove on Tuesday = Number of miles driver drove in all &#8211; Number of miles driver drove on Monday<br \/>\n= 954 &#8211; 672<br \/>\n= 282.<br \/>\nHence, Number of miles driver drove on Tuesday = 282.<\/p>\n<p><strong>Review &amp; Refresh<\/strong><\/p>\n<p>Question 10.<br \/>\nCircle the closed shapes with only 3 vertices.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-20882\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Answer-Key-Grade-2-Chapter-9-Add-Numbers-within-1000-9.5-26.png\" alt=\"Big Ideas Math Answer Key Grade 2 Chapter 9 Add Numbers within 1,000 9.5 26\" width=\"565\" height=\"91\" srcset=\"https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Answer-Key-Grade-2-Chapter-9-Add-Numbers-within-1000-9.5-26.png 565w, https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Answer-Key-Grade-2-Chapter-9-Add-Numbers-within-1000-9.5-26-300x48.png 300w\" sizes=\"(max-width: 565px) 100vw, 565px\" \/><br \/>\nAnswer:<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-25246\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Book-2nd-Grade-Answer-Key-Chapter-9-add-Numbers-within-1000-Lesson-9.5-Review-Refresh.png\" alt=\"\" width=\"755\" height=\"134\" srcset=\"https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Book-2nd-Grade-Answer-Key-Chapter-9-add-Numbers-within-1000-Lesson-9.5-Review-Refresh.png 755w, https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Book-2nd-Grade-Answer-Key-Chapter-9-add-Numbers-within-1000-Lesson-9.5-Review-Refresh-300x53.png 300w\" sizes=\"(max-width: 755px) 100vw, 755px\" \/><\/p>\n<p>Hence, shapes having only 3 vertices are circled.<\/p>\n<h3><a id=\"Lesson_9.6_Use_Models_to_Add_Three-Digit_Numbers\"><\/a>Lesson 9.6 Use Models to Add Three-Digit Numbers<\/h3>\n<p><strong>Explore and Grow<\/strong><\/p>\n<p>Model to solve. Make a quick sketch of your model.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-20883\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Answers-2nd-Grade-Chapter-9-Add-Numbers-within-1000-9.6-1.png\" alt=\"Big Ideas Math Answers 2nd Grade Chapter 9 Add Numbers within 1,000 9.6 1\" width=\"355\" height=\"247\" srcset=\"https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Answers-2nd-Grade-Chapter-9-Add-Numbers-within-1000-9.6-1.png 355w, https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Answers-2nd-Grade-Chapter-9-Add-Numbers-within-1000-9.6-1-300x209.png 300w\" sizes=\"(max-width: 355px) 100vw, 355px\" \/><br \/>\nAnswer:<br \/>\nGIVEN:<br \/>\n327 + 458 =???<br \/>\nADDITION:<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-25344\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Book-2nd-Grade-Answer-Key-Chapter-9-add-Numbers-within-1000-9.6-Use-Models-to-Add-Three-Digit-Numbers-.png\" alt=\"\" width=\"360\" height=\"271\" srcset=\"https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Book-2nd-Grade-Answer-Key-Chapter-9-add-Numbers-within-1000-9.6-Use-Models-to-Add-Three-Digit-Numbers-.png 360w, https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Book-2nd-Grade-Answer-Key-Chapter-9-add-Numbers-within-1000-9.6-Use-Models-to-Add-Three-Digit-Numbers--300x226.png 300w\" sizes=\"(max-width: 360px) 100vw, 360px\" \/><br \/>\n327 + 458 = 785.<br \/>\nHence, Sum of 327 + 458 = 785.<\/p>\n<p><strong>Show and Grow<\/strong><\/p>\n<p>Question 1.<br \/>\n383 + 255 = ?<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-20884\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Answers-2nd-Grade-Chapter-9-Add-Numbers-within-1000-9.6-2.png\" alt=\"Big Ideas Math Answers 2nd Grade Chapter 9 Add Numbers within 1,000 9.6 2\" width=\"592\" height=\"186\" srcset=\"https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Answers-2nd-Grade-Chapter-9-Add-Numbers-within-1000-9.6-2.png 592w, https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Answers-2nd-Grade-Chapter-9-Add-Numbers-within-1000-9.6-2-300x94.png 300w\" sizes=\"(max-width: 592px) 100vw, 592px\" \/><br \/>\nAnswer:<br \/>\nGIVEN:<br \/>\n383 + 255 = ???<br \/>\nADDITION:<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-25346\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Book-2nd-Grade-Answer-Key-Chapter-9-add-Numbers-within-1000-9.6-Show-and-Grow1.png\" alt=\"\" width=\"733\" height=\"305\" srcset=\"https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Book-2nd-Grade-Answer-Key-Chapter-9-add-Numbers-within-1000-9.6-Show-and-Grow1.png 733w, https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Book-2nd-Grade-Answer-Key-Chapter-9-add-Numbers-within-1000-9.6-Show-and-Grow1-300x125.png 300w\" sizes=\"(max-width: 733px) 100vw, 733px\" \/><br \/>\n383 + 255 = 638.<br \/>\nHence, Sum of 383 + 255 = 638.<\/p>\n<p><strong>Apply and Grow: Practice<\/strong><\/p>\n<p>Question 2.<br \/>\n238 + 354 = ?<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-20885\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Answers-2nd-Grade-Chapter-9-Add-Numbers-within-1000-9.6-3.png\" alt=\"Big Ideas Math Answers 2nd Grade Chapter 9 Add Numbers within 1,000 9.6 3\" width=\"589\" height=\"192\" srcset=\"https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Answers-2nd-Grade-Chapter-9-Add-Numbers-within-1000-9.6-3.png 589w, https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Answers-2nd-Grade-Chapter-9-Add-Numbers-within-1000-9.6-3-300x98.png 300w\" sizes=\"(max-width: 589px) 100vw, 589px\" \/><br \/>\nAnswer:<br \/>\nGIVEN:<br \/>\n238 + 354 = ???<br \/>\nADDITION:<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-25347\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Book-2nd-Grade-Answer-Key-Chapter-9-add-Numbers-within-1000-9.6-Show-and-Grow2.png\" alt=\"\" width=\"729\" height=\"295\" srcset=\"https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Book-2nd-Grade-Answer-Key-Chapter-9-add-Numbers-within-1000-9.6-Show-and-Grow2.png 729w, https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Book-2nd-Grade-Answer-Key-Chapter-9-add-Numbers-within-1000-9.6-Show-and-Grow2-300x121.png 300w\" sizes=\"(max-width: 729px) 100vw, 729px\" \/><br \/>\n238 + 354 = 592.<br \/>\nHence, Sum of 238 + 354 = 592.<\/p>\n<p>Question 3.<br \/>\n692 + 147 = ?<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-20886\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Answers-2nd-Grade-Chapter-9-Add-Numbers-within-1000-9.6-4.png\" alt=\"Big Ideas Math Answers 2nd Grade Chapter 9 Add Numbers within 1,000 9.6 4\" width=\"583\" height=\"192\" srcset=\"https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Answers-2nd-Grade-Chapter-9-Add-Numbers-within-1000-9.6-4.png 583w, https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Answers-2nd-Grade-Chapter-9-Add-Numbers-within-1000-9.6-4-300x99.png 300w\" sizes=\"(max-width: 583px) 100vw, 583px\" \/><br \/>\nAnswer:<br \/>\nGIVEN:<br \/>\n692 + 147 = ???<br \/>\nADDITION:<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-25348\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Book-2nd-Grade-Answer-Key-Chapter-9-add-Numbers-within-1000-9.6-Show-and-Grow3.png\" alt=\"\" width=\"735\" height=\"309\" srcset=\"https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Book-2nd-Grade-Answer-Key-Chapter-9-add-Numbers-within-1000-9.6-Show-and-Grow3.png 735w, https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Book-2nd-Grade-Answer-Key-Chapter-9-add-Numbers-within-1000-9.6-Show-and-Grow3-300x126.png 300w\" sizes=\"(max-width: 735px) 100vw, 735px\" \/><br \/>\n692 + 147 =\u00a0 839<br \/>\nHence, sum of 692 + 147 = 839.<\/p>\n<p>Question 4.<br \/>\n553 + 250 = ?<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-20887\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Answers-2nd-Grade-Chapter-9-Add-Numbers-within-1000-9.6-5.png\" alt=\"Big Ideas Math Answers 2nd Grade Chapter 9 Add Numbers within 1,000 9.6 5\" width=\"445\" height=\"192\" srcset=\"https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Answers-2nd-Grade-Chapter-9-Add-Numbers-within-1000-9.6-5.png 445w, https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Answers-2nd-Grade-Chapter-9-Add-Numbers-within-1000-9.6-5-300x129.png 300w\" sizes=\"(max-width: 445px) 100vw, 445px\" \/><br \/>\nAnswer:<br \/>\nGIVEN:<br \/>\n553 + 250 = ???<br \/>\nADDITION:<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-25350\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Book-2nd-Grade-Answer-Key-Chapter-9-add-Numbers-within-1000-9.6-Show-and-Grow4.png\" alt=\"\" width=\"576\" height=\"247\" srcset=\"https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Book-2nd-Grade-Answer-Key-Chapter-9-add-Numbers-within-1000-9.6-Show-and-Grow4.png 576w, https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Book-2nd-Grade-Answer-Key-Chapter-9-add-Numbers-within-1000-9.6-Show-and-Grow4-300x129.png 300w\" sizes=\"(max-width: 576px) 100vw, 576px\" \/><br \/>\n553 + 250 =\u00a0 803.<br \/>\nHence, Sum of 553 + 250 =\u00a0 803.<\/p>\n<p><strong>Think and Grow: Modeling Real Life<\/strong><\/p>\n<p>Your school wants to collect 750 canned goods. Your school collects 432 cans of soup and386 cans of vegetables. Does your school reach the goal? Explain.<br \/>\nModels:<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-20888\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Answers-2nd-Grade-Chapter-9-Add-Numbers-within-1000-9.6-6.png\" alt=\"Big Ideas Math Answers 2nd Grade Chapter 9 Add Numbers within 1,000 9.6 6\" width=\"475\" height=\"312\" srcset=\"https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Answers-2nd-Grade-Chapter-9-Add-Numbers-within-1000-9.6-6.png 475w, https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Answers-2nd-Grade-Chapter-9-Add-Numbers-within-1000-9.6-6-300x197.png 300w\" sizes=\"(max-width: 475px) 100vw, 475px\" \/><br \/>\nYes No<br \/>\n____________________<br \/>\n____________________<br \/>\nAnswer:<br \/>\nNumber of canned goods school wants to collect\u00a0 \u00a0= 750<br \/>\nNumber of cans of soup school collected =\u00a0 432<br \/>\nNumber of cans of vegetables school collected = 386<br \/>\nADDITION:<br \/>\nTotal number of cans of soup and cans of vegetables school collected<br \/>\n= 432 + 386 = 818.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-25491\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Book-2nd-Grade-Answer-Key-Chapter-9-add-Numbers-within-1000-9.6-Think-and-Grow-Modeling-Real-Life.png\" alt=\"\" width=\"585\" height=\"337\" srcset=\"https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Book-2nd-Grade-Answer-Key-Chapter-9-add-Numbers-within-1000-9.6-Think-and-Grow-Modeling-Real-Life.png 585w, https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Book-2nd-Grade-Answer-Key-Chapter-9-add-Numbers-within-1000-9.6-Think-and-Grow-Modeling-Real-Life-300x173.png 300w\" sizes=\"(max-width: 585px) 100vw, 585px\" \/><br \/>\nSUBTRACTION:<br \/>\nNumber of canned goods school wants to collect\u00a0 &#8211;\u00a0 Total number of cans of soup and cans of vegetables school collected<br \/>\n= 818 &#8211; 750<br \/>\n= 68.<br \/>\nYes, school reached its goal by 68 more than its wanted goods.<\/p>\n<p><strong>Show and Grow<\/strong><\/p>\n<p>Question 5.<br \/>\nA charity needs 600 volunteers. 328 people sign up on Saturday and 219 people sign up on Sunday. Are there enough volunteers? Explain.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-20889\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Answers-2nd-Grade-Chapter-9-Add-Numbers-within-1000-9.6-7.png\" alt=\"Big Ideas Math Answers 2nd Grade Chapter 9 Add Numbers within 1,000 9.6 7\" width=\"144\" height=\"87\" \/><br \/>\nYes No<br \/>\n______________________<br \/>\n______________________<br \/>\nAnswer:<br \/>\nGIVEN:<br \/>\nTotal number of volunteers in a charity = 600<br \/>\nNumber of people signed up on Saturday = 328<br \/>\nNumber of people signed up on Sunday = 219<br \/>\nADDITION:<br \/>\nTotal number of people signed up on\u00a0 Saturday and Sunday = 328 + 219 = 547.<br \/>\nNO, there are not enough volunteers because:<br \/>\nSUBTRACTION:<br \/>\nTotal number of volunteers in a charity &#8211; Total number of people signed up on\u00a0 Saturday and Sunday<br \/>\n= 600 &#8211; 547<br \/>\n= 53.<br \/>\nHence, no there are not enough because 53 more people are required to sign up into the charity.<\/p>\n<h3><a id=\"Use_Models_to_Add_Three-Digit_Numbers_Homework_&amp;_Practice_9.6\"><\/a>Use Models to Add Three-Digit Numbers Homework &amp; Practice 9.6<\/h3>\n<p>Question 1.<br \/>\n614 + 250 = ?<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-20890\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Answers-2nd-Grade-Chapter-9-Add-Numbers-within-1000-9.6-8.png\" alt=\"Big Ideas Math Answers 2nd Grade Chapter 9 Add Numbers within 1,000 9.6 8\" width=\"574\" height=\"191\" srcset=\"https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Answers-2nd-Grade-Chapter-9-Add-Numbers-within-1000-9.6-8.png 574w, https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Answers-2nd-Grade-Chapter-9-Add-Numbers-within-1000-9.6-8-300x100.png 300w\" sizes=\"(max-width: 574px) 100vw, 574px\" \/><br \/>\nAnswer:<br \/>\nGIVEN:<br \/>\n614 + 250 = ???<br \/>\nADDITION:<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-25354\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Book-2nd-Grade-Answer-Key-Chapter-9-add-Numbers-within-1000-Use-Models-to-Add-Three-Digit-Numbers-Homework-Practice-9.6.1.png\" alt=\"\" width=\"682\" height=\"258\" srcset=\"https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Book-2nd-Grade-Answer-Key-Chapter-9-add-Numbers-within-1000-Use-Models-to-Add-Three-Digit-Numbers-Homework-Practice-9.6.1.png 682w, https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Book-2nd-Grade-Answer-Key-Chapter-9-add-Numbers-within-1000-Use-Models-to-Add-Three-Digit-Numbers-Homework-Practice-9.6.1-300x113.png 300w\" sizes=\"(max-width: 682px) 100vw, 682px\" \/><br \/>\n614 + 250 = 864.<br \/>\nHence, 614 + 250 = 864.<\/p>\n<p>Question 2.<br \/>\n192 + 717 = ?<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-20891\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Answers-2nd-Grade-Chapter-9-Add-Numbers-within-1000-9.6-9.png\" alt=\"Big Ideas Math Answers 2nd Grade Chapter 9 Add Numbers within 1,000 9.6 9\" width=\"442\" height=\"183\" srcset=\"https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Answers-2nd-Grade-Chapter-9-Add-Numbers-within-1000-9.6-9.png 442w, https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Answers-2nd-Grade-Chapter-9-Add-Numbers-within-1000-9.6-9-300x124.png 300w\" sizes=\"(max-width: 442px) 100vw, 442px\" \/><br \/>\nAnswer:<br \/>\nGIVEN:<br \/>\n192 + 717 = ???<br \/>\nADDITION:<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-25356\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Book-2nd-Grade-Answer-Key-Chapter-9-add-Numbers-within-1000-Use-Models-to-Add-Three-Digit-Numbers-Homework-Practice-9.6.2.png\" alt=\"\" width=\"573\" height=\"271\" srcset=\"https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Book-2nd-Grade-Answer-Key-Chapter-9-add-Numbers-within-1000-Use-Models-to-Add-Three-Digit-Numbers-Homework-Practice-9.6.2.png 573w, https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Book-2nd-Grade-Answer-Key-Chapter-9-add-Numbers-within-1000-Use-Models-to-Add-Three-Digit-Numbers-Homework-Practice-9.6.2-300x142.png 300w\" sizes=\"(max-width: 573px) 100vw, 573px\" \/><br \/>\n192 + 717 = ???<br \/>\nHence, Sum of 192 + 717 = 909.<\/p>\n<p>Question 3.<br \/>\n<strong>Open-Ended<\/strong><br \/>\nComplete the addition problem so that you need to regroup to add.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-20892\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Answers-2nd-Grade-Chapter-9-Add-Numbers-within-1000-9.6-10.png\" alt=\"Big Ideas Math Answers 2nd Grade Chapter 9 Add Numbers within 1,000 9.6 10\" width=\"241\" height=\"116\" \/><br \/>\nAnswer:<br \/>\nGIVEN:<br \/>\n235 + 32? = ???<br \/>\nADDITION:<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-25357\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Book-2nd-Grade-Answer-Key-Chapter-9-add-Numbers-within-1000-9.6-Question-3.-Open-Ended.png\" alt=\"\" width=\"357\" height=\"229\" srcset=\"https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Book-2nd-Grade-Answer-Key-Chapter-9-add-Numbers-within-1000-9.6-Question-3.-Open-Ended.png 357w, https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Book-2nd-Grade-Answer-Key-Chapter-9-add-Numbers-within-1000-9.6-Question-3.-Open-Ended-300x192.png 300w\" sizes=\"(max-width: 357px) 100vw, 357px\" \/><br \/>\n253 + 325 = 578.<br \/>\nREGROUPING OF NUMBERS:<br \/>\nAdd 7 to 235.<br \/>\nSubtract 7 from 325.<br \/>\n253\u00a0 \u00a0 +\u00a0 \u00a0 \u00a0325<br \/>\n+\u00a0 7\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0&#8211;\u00a0 \u00a07<br \/>\n260\u00a0 \u00a0 +\u00a0 \u00a0 \u00a0318 = 578.<br \/>\nHence, Sum of 253 + 325 = 578.<\/p>\n<p>Question 4.<br \/>\n<strong>Modeling Real Life<\/strong><br \/>\nThe cafeteria needs 700 trays. They have 312 brown trays and 342 orange trays. Does the cafeteria have enough trays? Explain.<br \/>\nYes No<br \/>\n_____________________________<br \/>\n_____________________________<br \/>\nAnswer:<br \/>\nGIVEN:<br \/>\nTotal number of trays cafeteria needs = 700<br \/>\nNumber of brown trays cafeteria has = 312<br \/>\nNumber of\u00a0 orange trays cafeteria has = 342<br \/>\nADDITION:<br \/>\nTotal\u00a0 number of brown and orange trays cafeteria has = 312 + 342 = 654<br \/>\nSUBTRACTION:<br \/>\nTotal number of trays cafeteria needs &#8211; Total\u00a0 number of brown and orange trays cafeteria has<br \/>\n= 700 &#8211; 654<br \/>\n= 46.<br \/>\nHence, there are no enough trays in the cafeteria.46 more trays the cafeteria needs.<\/p>\n<p><strong>Review &amp; Refresh<\/strong><\/p>\n<p><strong>Draw to show the time.<\/strong><br \/>\nQuestion 5.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-20893\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Answers-2nd-Grade-Chapter-9-Add-Numbers-within-1000-9.6-11.png\" alt=\"Big Ideas Math Answers 2nd Grade Chapter 9 Add Numbers within 1,000 9.6 11\" width=\"257\" height=\"121\" \/><br \/>\nAnswer:<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-25361\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Book-2nd-Grade-Answer-Key-Chapter-9-add-Numbers-within-1000-9.6-Review-Refresh1.png\" alt=\"\" width=\"364\" height=\"220\" srcset=\"https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Book-2nd-Grade-Answer-Key-Chapter-9-add-Numbers-within-1000-9.6-Review-Refresh1.png 364w, https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Book-2nd-Grade-Answer-Key-Chapter-9-add-Numbers-within-1000-9.6-Review-Refresh1-300x181.png 300w\" sizes=\"(max-width: 364px) 100vw, 364px\" \/><\/p>\n<p>Question 6.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-20894\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Answers-2nd-Grade-Chapter-9-Add-Numbers-within-1000-9.6-12.png\" alt=\"Big Ideas Math Answers 2nd Grade Chapter 9 Add Numbers within 1,000 9.6 12\" width=\"265\" height=\"125\" \/><br \/>\nAnswer:<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-24566\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Book-2nd-Grade-Answer-Key-Chapter-9-add-Numbers-within-1000-Homework-Practice-9.6-1.png\" alt=\"\" width=\"372\" height=\"203\" srcset=\"https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Book-2nd-Grade-Answer-Key-Chapter-9-add-Numbers-within-1000-Homework-Practice-9.6-1.png 372w, https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Book-2nd-Grade-Answer-Key-Chapter-9-add-Numbers-within-1000-Homework-Practice-9.6-1-300x164.png 300w\" sizes=\"(max-width: 372px) 100vw, 372px\" \/><\/p>\n<h3><a id=\"Lesson_9.7_Add_Three-Digit_Numbers\"><\/a>Lesson 9.7 Add Three-Digit Numbers<\/h3>\n<p><strong>Explore and Grow<\/strong><\/p>\n<p>Find each sum.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-20895\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Answers-Grade-2-Chapter-9-Add-Numbers-within-1000-9.7-1.png\" alt=\"Big Ideas Math Answers Grade 2 Chapter 9 Add Numbers within 1,000 9.7 1\" width=\"553\" height=\"192\" srcset=\"https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Answers-Grade-2-Chapter-9-Add-Numbers-within-1000-9.7-1.png 553w, https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Answers-Grade-2-Chapter-9-Add-Numbers-within-1000-9.7-1-300x104.png 300w\" sizes=\"(max-width: 553px) 100vw, 553px\" \/><br \/>\nAnswer:<br \/>\nGIVEN:<br \/>\n445 + 254 = ???<br \/>\n253 + 318 = ???<br \/>\n627 + 194 =???<br \/>\nADDITION:<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-25365\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Book-2nd-Grade-Answer-Key-Chapter-9-add-Numbers-within-1000-9.6-Review-Refresh1-1.png\" alt=\"\" width=\"659\" height=\"252\" srcset=\"https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Book-2nd-Grade-Answer-Key-Chapter-9-add-Numbers-within-1000-9.6-Review-Refresh1-1.png 659w, https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Book-2nd-Grade-Answer-Key-Chapter-9-add-Numbers-within-1000-9.6-Review-Refresh1-1-300x115.png 300w\" sizes=\"(max-width: 659px) 100vw, 659px\" \/><br \/>\n445 + 254 = 699<br \/>\n253 + 318 =\u00a0 571<br \/>\n627 + 194 = 821<br \/>\nHence, Sum of 445 + 254 = 699<br \/>\n253 + 318 =\u00a0 571<br \/>\n627 + 194 = 821.<\/p>\n<p>Compare the problems. How are they the same? How are they different?<br \/>\n_________________________<br \/>\n_________________________<br \/>\nAnswer:<br \/>\nThey are same with the process of adding and they are different in the results.<\/p>\n<p><strong>Show and Grow<\/strong><\/p>\n<p>Question 1.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-20896\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Answers-Grade-2-Chapter-9-Add-Numbers-within-1000-9.7-2.png\" alt=\"Big Ideas Math Answers Grade 2 Chapter 9 Add Numbers within 1,000 9.7 2\" width=\"131\" height=\"117\" \/><br \/>\nAnswer:<br \/>\nGIVEN:<br \/>\n184+438 = ???<br \/>\nADDITION:<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-25492\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Book-2nd-Grade-Answer-Key-Chapter-9-add-Numbers-within-1000-9.7-show-and-grow1.png\" alt=\"\" width=\"261\" height=\"185\" \/><br \/>\nHence, sum of 184+438 = 622.<\/p>\n<p>Question 2.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-20897\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Answers-Grade-2-Chapter-9-Add-Numbers-within-1000-9.7-3.png\" alt=\"Big Ideas Math Answers Grade 2 Chapter 9 Add Numbers within 1,000 9.7 3\" width=\"150\" height=\"119\" \/><br \/>\nAnswer:<br \/>\nGIVEN:<br \/>\n227 + 267 = ???<br \/>\nADDITION:<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-25493\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Book-2nd-Grade-Answer-Key-Chapter-9-add-Numbers-within-1000-9.7-show-and-grow2.png\" alt=\"\" width=\"178\" height=\"184\" \/><br \/>\nHence, Sum of 227 + 267 = 494.<\/p>\n<p>Question 3.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-20898\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Answers-Grade-2-Chapter-9-Add-Numbers-within-1000-9.7-4.png\" alt=\"Big Ideas Math Answers Grade 2 Chapter 9 Add Numbers within 1,000 9.7 4\" width=\"135\" height=\"126\" \/><br \/>\nAnswer:<br \/>\nGIVEN:<br \/>\n421 + 354 = ???<br \/>\nADDITION:<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-25495\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Book-2nd-Grade-Answer-Key-Chapter-9-add-Numbers-within-1000-9.7-show-and-grow2-1.png\" alt=\"\" width=\"194\" height=\"182\" \/><br \/>\nHence, Sum of 421 + 354 = 775.<\/p>\n<p>Question 4.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-20899\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Answers-Grade-2-Chapter-9-Add-Numbers-within-1000-9.7-5.png\" alt=\"Big Ideas Math Answers Grade 2 Chapter 9 Add Numbers within 1,000 9.7 5\" width=\"139\" height=\"128\" \/><br \/>\nAnswer:<br \/>\nGIVEN:<br \/>\n279 + 514 = ???<br \/>\nADDITION:<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-25496\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Book-2nd-Grade-Answer-Key-Chapter-9-add-Numbers-within-1000-9.7-show-and-grow4.png\" alt=\"\" width=\"197\" height=\"169\" \/><br \/>\nHence, Sum of 279 + 514 = 793.<\/p>\n<p>Question 5.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-20900\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Answers-Grade-2-Chapter-9-Add-Numbers-within-1000-9.7-6.png\" alt=\"Big Ideas Math Answers Grade 2 Chapter 9 Add Numbers within 1,000 9.7 6\" width=\"136\" height=\"115\" \/><br \/>\nAnswer:<br \/>\nGIVEN:<br \/>\n313 + 288 = ???<br \/>\nADDITION:<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-25499\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Book-2nd-Grade-Answer-Key-Chapter-9-add-Numbers-within-1000-9.7-show-and-grow5.png\" alt=\"\" width=\"220\" height=\"213\" \/><br \/>\nHence, Sum of 313 + 288 = 601.<\/p>\n<p>Question 6.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-20901\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Answers-Grade-2-Chapter-9-Add-Numbers-within-1000-9.7-7.png\" alt=\"Big Ideas Math Answers Grade 2 Chapter 9 Add Numbers within 1,000 9.7 7\" width=\"138\" height=\"124\" \/><br \/>\nAnswer:<br \/>\nGIVEN:<br \/>\n396 + 156 = ???<br \/>\nADDITION:<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-25500\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Book-2nd-Grade-Answer-Key-Chapter-9-add-Numbers-within-1000-9.7-show-and-grow6.png\" alt=\"\" width=\"204\" height=\"173\" \/><br \/>\nHence, Sum of 396 + 156 = 552.<\/p>\n<p>Question 7.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-20902\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Answers-Grade-2-Chapter-9-Add-Numbers-within-1000-9.7-8.png\" alt=\"Big Ideas Math Answers Grade 2 Chapter 9 Add Numbers within 1,000 9.7 8\" width=\"129\" height=\"92\" \/><br \/>\nAnswer:<br \/>\nGIVEN:<br \/>\n659 + 258 = ???<br \/>\nADDITION:<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-25501\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Book-2nd-Grade-Answer-Key-Chapter-9-add-Numbers-within-1000-9.7-show-and-grow7.png\" alt=\"\" width=\"179\" height=\"162\" \/><br \/>\nHence, Sum of 659 + 258 = 917.<\/p>\n<p>Question 8.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-20903\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Answers-Grade-2-Chapter-9-Add-Numbers-within-1000-9.7-9.png\" alt=\"Big Ideas Math Answers Grade 2 Chapter 9 Add Numbers within 1,000 9.7 9\" width=\"137\" height=\"89\" \/><br \/>\nAnswer:<br \/>\nGIVEN:<br \/>\n463 + 485 = ???<br \/>\nADDITION:<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-25503\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Book-2nd-Grade-Answer-Key-Chapter-9-add-Numbers-within-1000-9.7-show-and-grow8.png\" alt=\"\" width=\"198\" height=\"172\" \/><br \/>\nHence, Sum of 463 + 485 = 948.<\/p>\n<p>Question 9.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-20904\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Answers-Grade-2-Chapter-9-Add-Numbers-within-1000-9.7-10.png\" alt=\"Big Ideas Math Answers Grade 2 Chapter 9 Add Numbers within 1,000 9.7 10\" width=\"136\" height=\"92\" \/><br \/>\nAnswer:<br \/>\nGIVEN:<br \/>\n298 + 378 = ???<br \/>\nADDITION:<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-25505\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Book-2nd-Grade-Answer-Key-Chapter-9-add-Numbers-within-1000-9.7-show-and-grow9.png\" alt=\"\" width=\"223\" height=\"161\" \/><br \/>\nHence, Sum of 298 + 378 = 676.<\/p>\n<p><strong>Apply and Grow: Practice<\/strong><\/p>\n<p>Question 10.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-20905\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Answers-Grade-2-Chapter-9-Add-Numbers-within-1000-9.7-11.png\" alt=\"Big Ideas Math Answers Grade 2 Chapter 9 Add Numbers within 1,000 9.7 11\" width=\"131\" height=\"84\" \/><br \/>\nAnswer:<br \/>\nGIVEN:<br \/>\n245 + 605 = ???<br \/>\nADDITION:<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-25557\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Book-2nd-Grade-Answer-Key-Chapter-9-add-Numbers-within-1000-9.7-Apply-Grow-Practice1..png\" alt=\"\" width=\"184\" height=\"149\" \/><br \/>\n245 + 605 = 810<br \/>\nHence, Sum of 245 + 605 = 810.<\/p>\n<p>Question 11.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-20906\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Answers-Grade-2-Chapter-9-Add-Numbers-within-1000-9.7-12.png\" alt=\"Big Ideas Math Answers Grade 2 Chapter 9 Add Numbers within 1,000 9.7 12\" width=\"141\" height=\"83\" \/><br \/>\nAnswer:<br \/>\nGIVEN:<br \/>\n450 + 291 = ???<br \/>\nADDITION:<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-25656\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Book-2nd-Grade-Answer-Key-Chapter-9-add-Numbers-within-1000-9.7-Apply-Grow-Practice11..png\" alt=\"\" width=\"176\" height=\"198\" \/><br \/>\n450 + 291 = 741.<br \/>\nHence, Sum of 450 + 291 = 741.<\/p>\n<p>Question 12.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-20907\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Answers-Grade-2-Chapter-9-Add-Numbers-within-1000-9.7-13.png\" alt=\"Big Ideas Math Answers Grade 2 Chapter 9 Add Numbers within 1,000 9.7 13\" width=\"135\" height=\"88\" \/><br \/>\nAnswer:<br \/>\nGIVEN:<br \/>\n198 + 527 = ???<br \/>\nADDITION:<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-25689\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Book-2nd-Grade-Answer-Key-Chapter-9-add-Numbers-within-1000-9.7-Apply-Grow-Practice12..png\" alt=\"\" width=\"188\" height=\"173\" \/><br \/>\n198 + 527 = 725.<br \/>\nHence, Sum of 198 + 527 = 725.<\/p>\n<p>Question 13.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-20908\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Answers-Grade-2-Chapter-9-Add-Numbers-within-1000-9.7-14.png\" alt=\"Big Ideas Math Answers Grade 2 Chapter 9 Add Numbers within 1,000 9.7 14\" width=\"130\" height=\"89\" \/><br \/>\nAnswer:<br \/>\nGIVEN:<br \/>\n742 + 116 = ???<br \/>\nADDITION:<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-25742\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Book-2nd-Grade-Answer-Key-Chapter-9-add-Numbers-within-1000-9.7-Apply-Grow-Practice13..png\" alt=\"\" width=\"199\" height=\"170\" \/><br \/>\n742 + 116 = 858.<br \/>\nHence, Sum of 742 + 116 = 858.<\/p>\n<p>Question 14.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-20909\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Answers-Grade-2-Chapter-9-Add-Numbers-within-1000-9.7-15.png\" alt=\"Big Ideas Math Answers Grade 2 Chapter 9 Add Numbers within 1,000 9.7 15\" width=\"129\" height=\"87\" \/><br \/>\nAnswer:<br \/>\nGIVEN:<br \/>\n537 + 176 = ???<br \/>\nADDITION:<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-25760\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Book-2nd-Grade-Answer-Key-Chapter-9-add-Numbers-within-1000-9.7-Apply-Grow-Practice14..png\" alt=\"\" width=\"174\" height=\"146\" \/><br \/>\n537 + 176 = 713.<br \/>\nHence, Sum of 537 + 176 = 713.<\/p>\n<p>Question 15.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-20910\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Answers-Grade-2-Chapter-9-Add-Numbers-within-1000-9.7-16.png\" alt=\"Big Ideas Math Answers Grade 2 Chapter 9 Add Numbers within 1,000 9.7 16\" width=\"125\" height=\"85\" \/><br \/>\nAnswer:<br \/>\nGIVEN:<br \/>\n382 + 351 = ???<br \/>\nADDITION:<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-25771\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Book-2nd-Grade-Answer-Key-Chapter-9-add-Numbers-within-1000-9.7-Apply-Grow-Practice15..png\" alt=\"\" width=\"226\" height=\"178\" \/><br \/>\n382 + 351 = 733.<br \/>\nHence, Sum of 382 + 351 = 733.<\/p>\n<p>Question 16.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-20911\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Answers-Grade-2-Chapter-9-Add-Numbers-within-1000-9.7-17.png\" alt=\"Big Ideas Math Answers Grade 2 Chapter 9 Add Numbers within 1,000 9.7 17\" width=\"129\" height=\"90\" \/><br \/>\nAnswer:<br \/>\nGIVEN:<br \/>\n463 + 194 = ???<br \/>\nADDITION:<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-25772\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Book-2nd-Grade-Answer-Key-Chapter-9-add-Numbers-within-1000-9.7-Apply-Grow-Practice16..png\" alt=\"\" width=\"188\" height=\"167\" \/><br \/>\n463 + 194 = 657.<br \/>\nHence, Sum of 463 + 194 = 657.<\/p>\n<p>Question 17.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-20912\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Answers-Grade-2-Chapter-9-Add-Numbers-within-1000-9.7-18.png\" alt=\"Big Ideas Math Answers Grade 2 Chapter 9 Add Numbers within 1,000 9.7 18\" width=\"135\" height=\"87\" \/><br \/>\nAnswer:<br \/>\nGIVEN:<br \/>\n186 + 567 = ???<br \/>\nADDITION:<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-25773\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Book-2nd-Grade-Answer-Key-Chapter-9-add-Numbers-within-1000-9.7-Apply-Grow-Practice17..png\" alt=\"\" width=\"189\" height=\"190\" srcset=\"https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Book-2nd-Grade-Answer-Key-Chapter-9-add-Numbers-within-1000-9.7-Apply-Grow-Practice17..png 189w, https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Book-2nd-Grade-Answer-Key-Chapter-9-add-Numbers-within-1000-9.7-Apply-Grow-Practice17.-150x150.png 150w\" sizes=\"(max-width: 189px) 100vw, 189px\" \/><br \/>\n186 + 567 = 753.<br \/>\nHence, Sum of 186 + 567 = 753.<\/p>\n<p>Question 18.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-20913\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Answers-Grade-2-Chapter-9-Add-Numbers-within-1000-9.7-19.png\" alt=\"Big Ideas Math Answers Grade 2 Chapter 9 Add Numbers within 1,000 9.7 19\" width=\"126\" height=\"88\" \/><br \/>\nAnswer:<br \/>\nGIVEN:<br \/>\n623 + 298 = ???<br \/>\nADDITION:<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-25775\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Book-2nd-Grade-Answer-Key-Chapter-9-add-Numbers-within-1000-9.7-Apply-Grow-Practice18..png\" alt=\"\" width=\"180\" height=\"187\" \/><br \/>\n623 + 298 = 921.<br \/>\nHence, Sum of 623 + 298 = 921.<\/p>\n<p>Question 19.<br \/>\n<strong>DIG DEEPER!<\/strong><br \/>\nFind the missing digits<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-20914\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Answers-Grade-2-Chapter-9-Add-Numbers-within-1000-9.7-20.png\" alt=\"Big Ideas Math Answers Grade 2 Chapter 9 Add Numbers within 1,000 9.7 20\" width=\"595\" height=\"124\" srcset=\"https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Answers-Grade-2-Chapter-9-Add-Numbers-within-1000-9.7-20.png 595w, https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Answers-Grade-2-Chapter-9-Add-Numbers-within-1000-9.7-20-300x63.png 300w\" sizes=\"(max-width: 595px) 100vw, 595px\" \/><br \/>\nAnswer:<br \/>\nGIVEN:<br \/>\n462 + ___43 = 705.<br \/>\nSUBTRACTION:<br \/>\n=&gt; 705 &#8211; 462 = 243.<\/p>\n<p>1___7 + 115 = 252.<br \/>\nSUBTRACTION:<br \/>\n=&gt; 252 &#8211; 115 = 137.<\/p>\n<p>395 + 14___ = 540.<br \/>\nSUBTRACTION:<br \/>\n=&gt; 540 &#8211; 395 = 145.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-25514\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Book-2nd-Grade-Answer-Key-Chapter-9-add-Numbers-within-1000-9.7-Question-19.-DIG-DEEPER.png\" alt=\"\" width=\"716\" height=\"175\" srcset=\"https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Book-2nd-Grade-Answer-Key-Chapter-9-add-Numbers-within-1000-9.7-Question-19.-DIG-DEEPER.png 716w, https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Book-2nd-Grade-Answer-Key-Chapter-9-add-Numbers-within-1000-9.7-Question-19.-DIG-DEEPER-300x73.png 300w\" sizes=\"(max-width: 716px) 100vw, 716px\" \/><br \/>\nHence, Sum of\u00a0 462 + 343 = 705.<br \/>\n147 + 115 = 252.<br \/>\n395 + 145 = 540.<\/p>\n<p><strong>Think and Grow: Modeling Real Life<\/strong><\/p>\n<p>A puzzle has 540 pieces. You put 254 pieces together. Your friend puts 286 pieces together. Did you and your friend use all of the pieces?<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-20915\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Answers-Grade-2-Chapter-9-Add-Numbers-within-1000-9.7-21.png\" alt=\"Big Ideas Math Answers Grade 2 Chapter 9 Add Numbers within 1,000 9.7 21\" width=\"105\" height=\"124\" \/><br \/>\nAddition equation:<br \/>\nYes\u00a0 \u00a0 \u00a0 \u00a0 \u00a0No<br \/>\nAnswer:<br \/>\nTotal number of pieces the puzzles has = 540<br \/>\nNumber of pieces kept together by me = 254<br \/>\nNumber of pieces kept together by my Friend = 286<br \/>\nADDITION:<br \/>\nTotal number of pieces kept together = Number of pieces kept together by me + Number of pieces kept together by my Friend<br \/>\n= 254 + 286<br \/>\n= 540.<br \/>\nHence, my friend and me used all the pieces of puzzle.<br \/>\nYes ,its a addition equation.<\/p>\n<p><strong>Show and Grow<\/strong><\/p>\n<p>Question 20.<br \/>\nA sticker book has 800 stickers. You use 413 of them. Your friend uses 377. Did you and your friend use all of the stickers?<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-20916\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Answers-Grade-2-Chapter-9-Add-Numbers-within-1000-9.7-22.png\" alt=\"Big Ideas Math Answers Grade 2 Chapter 9 Add Numbers within 1,000 9.7 22\" width=\"157\" height=\"146\" \/><br \/>\nYes No<br \/>\nAnswer:<br \/>\nTotal number of stickers a sticker book has = 800<br \/>\nNumber of stickers used by me =413<br \/>\nNumber of stickers used by my Friend = 377<br \/>\nADDITION:<br \/>\nTotal number of stickers used = Total number of stickers used by me and my Friend<br \/>\n= 413 + 377 = 790.<br \/>\nNumber of stickers remaining = Total number of stickers a sticker book has &#8211; Total number of stickers used by me and my Friend<br \/>\n= 800 -790<br \/>\n= 10.<br \/>\nNumber of stickers remaining = 10.<br \/>\nHence, NO we did not use all stickers. There are 10 more stickers to be used.<\/p>\n<p>Question 21.<br \/>\nA bus has 850 miles to travel. How many miles does the bus have left to travel?<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-20917\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Answers-Grade-2-Chapter-9-Add-Numbers-within-1000-9.7-23.png\" alt=\"Big Ideas Math Answers Grade 2 Chapter 9 Add Numbers within 1,000 9.7 23\" width=\"254\" height=\"115\" \/><br \/>\n______ miles<br \/>\nAnswer:<br \/>\nTotal number of miles the bus travels = 850<br \/>\nNumber of miles bus travelled on day 1 = 423<br \/>\nNumber of miles bus travelled on day 2 = 417<br \/>\nADDITION:<br \/>\nNumber of miles bus travelled on day 1 and day 2 = 423 + 417 = 840.<br \/>\nDIFFERENCE:<br \/>\nNumber of miles left out for the bus to travel =Total number of miles the bus travels &#8211; Number of miles bus travelled on day 1 and day 2<br \/>\n= 850 &#8211; 840<br \/>\n= 10.<br \/>\nHence, Number of miles left out for the bus to travel =10.<\/p>\n<h3><strong><a id=\"Add_Three-Digit_Numbers_Homework_&amp;_Practice_9.7\"><\/a>Add Three-Digit Numbers Homework &amp; Practice 9.7<\/strong><\/h3>\n<p>Question 1.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-20918\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Answers-Grade-2-Chapter-9-Add-Numbers-within-1000-9.7-24.png\" alt=\"Big Ideas Math Answers Grade 2 Chapter 9 Add Numbers within 1,000 9.7 24\" width=\"134\" height=\"112\" \/><br \/>\nAnswer:<br \/>\nGIVEN:<br \/>\n341 + 278 = ???<br \/>\nADDITION:<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-25526\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Book-2nd-Grade-Answer-Key-Chapter-9-add-Numbers-within-1000-Add-Three-Digit-Numbers-Homework-Practice-9.7-1.png\" alt=\"\" width=\"205\" height=\"197\" \/><br \/>\nHence, Sum of 341 + 278 = 619.<\/p>\n<p>Question 2.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-20919\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Answers-Grade-2-Chapter-9-Add-Numbers-within-1000-9.7-25.png\" alt=\"Big Ideas Math Answers Grade 2 Chapter 9 Add Numbers within 1,000 9.7 25\" width=\"124\" height=\"117\" \/><br \/>\nAnswer:<br \/>\nGIVEN:<br \/>\n705 + 126 = ???<br \/>\nADDITION:<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-25527\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Book-2nd-Grade-Answer-Key-Chapter-9-add-Numbers-within-1000-Add-Three-Digit-Numbers-Homework-Practice-9.7.2.png\" alt=\"\" width=\"192\" height=\"176\" \/><br \/>\nHence, Sum of 705 + 126 = 831.<\/p>\n<p>Question 3.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-20920\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Answers-Grade-2-Chapter-9-Add-Numbers-within-1000-9.7-26.png\" alt=\"Big Ideas Math Answers Grade 2 Chapter 9 Add Numbers within 1,000 9.7 26\" width=\"136\" height=\"111\" \/><br \/>\nAnswer:<br \/>\nGIVEN:<br \/>\n582 + 249 = ???<br \/>\nADDITION:<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-25528\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Book-2nd-Grade-Answer-Key-Chapter-9-add-Numbers-within-1000-Add-Three-Digit-Numbers-Homework-Practice-9.7.3.png\" alt=\"\" width=\"184\" height=\"149\" \/><br \/>\nHence, Sum of \u00a0582 + 249 = 831.<\/p>\n<p>Question 4.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-20921\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Answers-Grade-2-Chapter-9-Add-Numbers-within-1000-9.7-27.png\" alt=\"Big Ideas Math Answers Grade 2 Chapter 9 Add Numbers within 1,000 9.7 27\" width=\"123\" height=\"111\" \/><br \/>\nAnswer:<br \/>\nGIVEN:<br \/>\n573 + 338 = ???<br \/>\nADDITION:<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-25529\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Book-2nd-Grade-Answer-Key-Chapter-9-add-Numbers-within-1000-Add-Three-Digit-Numbers-Homework-Practice-9.7.4.png\" alt=\"\" width=\"173\" height=\"186\" \/><br \/>\nHence, Sum of 573 + 338 = 911.<\/p>\n<p>Question 5.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-20922\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Answers-Grade-2-Chapter-9-Add-Numbers-within-1000-9.7-28.png\" alt=\"Big Ideas Math Answers Grade 2 Chapter 9 Add Numbers within 1,000 9.7 28\" width=\"130\" height=\"112\" \/><br \/>\nAnswer:<br \/>\nGIVEN:<br \/>\n264 + 310 = ???<br \/>\nADDITION:<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-25530\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Book-2nd-Grade-Answer-Key-Chapter-9-add-Numbers-within-1000-Add-Three-Digit-Numbers-Homework-Practice-9.7.5.png\" alt=\"\" width=\"190\" height=\"191\" srcset=\"https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Book-2nd-Grade-Answer-Key-Chapter-9-add-Numbers-within-1000-Add-Three-Digit-Numbers-Homework-Practice-9.7.5.png 190w, https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Book-2nd-Grade-Answer-Key-Chapter-9-add-Numbers-within-1000-Add-Three-Digit-Numbers-Homework-Practice-9.7.5-150x150.png 150w\" sizes=\"(max-width: 190px) 100vw, 190px\" \/><br \/>\nHence, Sum of 264 + 310 = = 574.<\/p>\n<p>Question 6.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-20923\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Answers-Grade-2-Chapter-9-Add-Numbers-within-1000-9.7-29.png\" alt=\"Big Ideas Math Answers Grade 2 Chapter 9 Add Numbers within 1,000 9.7 29\" width=\"130\" height=\"119\" \/><br \/>\nAnswer:<br \/>\nGIVEN:<br \/>\n516 + 156 = ???<br \/>\nADDITION:<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-25531\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Book-2nd-Grade-Answer-Key-Chapter-9-add-Numbers-within-1000-Add-Three-Digit-Numbers-Homework-Practice-9.7.6.png\" alt=\"\" width=\"191\" height=\"182\" \/><br \/>\nHence, Sum of 516 + 156 = 672.<\/p>\n<p>Question 7.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-20924\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Answers-Grade-2-Chapter-9-Add-Numbers-within-1000-9.7-30.png\" alt=\"Big Ideas Math Answers Grade 2 Chapter 9 Add Numbers within 1,000 9.7 30\" width=\"126\" height=\"95\" \/><br \/>\nAnswer:<br \/>\nGIVEN:<br \/>\n490 + 137 = ???<br \/>\nADDITION:<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-25533\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Book-2nd-Grade-Answer-Key-Chapter-9-add-Numbers-within-1000-Add-Three-Digit-Numbers-Homework-Practice-9.7.7-1.png\" alt=\"\" width=\"212\" height=\"169\" \/><br \/>\nHence, Sum of 490 + 137 = 627.<\/p>\n<p>Question 8.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-20925\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Answers-Grade-2-Chapter-9-Add-Numbers-within-1000-9.7-31.png\" alt=\"Big Ideas Math Answers Grade 2 Chapter 9 Add Numbers within 1,000 9.7 31\" width=\"127\" height=\"90\" \/><br \/>\nAnswer:<br \/>\nGIVEN:<br \/>\n625 + 297 = ???<br \/>\nADDITION:<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-25534\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Book-2nd-Grade-Answer-Key-Chapter-9-add-Numbers-within-1000-Add-Three-Digit-Numbers-Homework-Practice-9.7.8.png\" alt=\"\" width=\"191\" height=\"151\" \/><br \/>\nHence, Sum of 625 + 297 = = 922.<\/p>\n<p>Question 9.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-20926\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Answers-Grade-2-Chapter-9-Add-Numbers-within-1000-9.7-32.png\" alt=\"Big Ideas Math Answers Grade 2 Chapter 9 Add Numbers within 1,000 9.7 32\" width=\"127\" height=\"92\" \/><br \/>\nAnswer:<br \/>\nGIVEN:<br \/>\n364 + 386 = ???<br \/>\nADDITION:<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-25535\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Book-2nd-Grade-Answer-Key-Chapter-9-add-Numbers-within-1000-Add-Three-Digit-Numbers-Homework-Practice-9.7.9.png\" alt=\"\" width=\"214\" height=\"187\" \/><br \/>\nHence, Sum of 364 + 386 = 750.<\/p>\n<p>Question 10.<br \/>\n<strong>Open-Ended<\/strong><br \/>\nComplete the addition problem so that you do not need to regroup to add.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-20927\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Answers-Grade-2-Chapter-9-Add-Numbers-within-1000-9.7-33.png\" alt=\"Big Ideas Math Answers Grade 2 Chapter 9 Add Numbers within 1,000 9.7 33\" width=\"241\" height=\"125\" \/><br \/>\nAnswer:<br \/>\nGIVEN:<br \/>\n256 + 3____3 = ???<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-25523\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Book-2nd-Grade-Answer-Key-Chapter-9-add-Numbers-within-1000-9.7-Question-10.png\" alt=\"\" width=\"301\" height=\"188\" \/><\/p>\n<p>Missing number = 4<br \/>\nADDITION:<br \/>\n256 + 343 = 599.<br \/>\nHence, Sum of 256 + 343 = 599.<\/p>\n<p>Question 11.<br \/>\n<strong>Modeling Real Life<\/strong><br \/>\nThe art room has 645 markers. One class is using 312 markers. Another class is using 209. Are both classes using all the markers?<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-20928\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Answers-Grade-2-Chapter-9-Add-Numbers-within-1000-9.7-34.png\" alt=\"Big Ideas Math Answers Grade 2 Chapter 9 Add Numbers within 1,000 9.7 34\" width=\"106\" height=\"114\" \/><br \/>\nYes No<br \/>\nAnswer:<br \/>\nGIVEN:<br \/>\nNumber of Markers art room has = 645<br \/>\nNumber of markers one class using = 312<br \/>\nNumber of markers another class using = 209<br \/>\nADDITION:<br \/>\nTotal Number of markers used by one class and another class = 312 + 209 = 521<br \/>\nSUBTRACTION:<br \/>\nNumber of markers unused = Number of Markers art room has &#8211; Total Number of markers used by one class and another class<br \/>\n= 645 &#8211; 521<br \/>\n= 124.<br \/>\nHence, Number of markers unused = 124.<br \/>\nNO, all markers are not used.<\/p>\n<p>Question 12.<br \/>\n<strong>Modeling Real Life<\/strong><br \/>\n340 water balloons need to be filled. You fill 122 and your friend fills 145. How many more water balloons need to be filled?<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-20929\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Answers-Grade-2-Chapter-9-Add-Numbers-within-1000-9.7-35.png\" alt=\"Big Ideas Math Answers Grade 2 Chapter 9 Add Numbers within 1,000 9.7 35\" width=\"79\" height=\"105\" \/><br \/>\n____ water balloons<br \/>\nAnswer:<br \/>\nGIVEN:<br \/>\nNumber of balloons needed to be filled = 340<br \/>\nNumber of balloons filled by me = 122<br \/>\nNumber of balloons filled by my friend = 145<br \/>\nADDITION:<br \/>\nTotal Number of balloons filled by me and my friend = 122 + 145 =\u00a0 267.<br \/>\nSUBTRACTION:<br \/>\nNumber of balloons more to be filled = Number of balloons needed to be filled &#8211; Total Number of balloons filled by me and my friend<br \/>\n= 340 &#8211; 267<br \/>\n= 73.<br \/>\nHence, Number of balloons more to be filled = 73.<\/p>\n<p><strong>Review &amp; Refresh<\/strong><\/p>\n<p><strong>Use place value to find the missing numbers.<\/strong><br \/>\nQuestion 13.<br \/>\n324, 325, ____, 327, _____, _____, ______<br \/>\nAnswer:<br \/>\nGIVEN:<br \/>\n324, 325, ____, 327, _____, _____, ______<br \/>\nSUBTRACTION:<br \/>\n=&gt; 325 &#8211; 324 = 1\u00a0 (PLACE VALUE)<br \/>\nADDITION:<br \/>\n325 + 1 = 326<br \/>\n327 + 1 = 328<br \/>\n328 + 1 = 329<br \/>\n329 + 1 = 330<br \/>\nHence, the missing number sequence =324, 325, 326, 327, 328, 329, 330.<\/p>\n<p>Question 14.<br \/>\n463, 473, ____, 493, ____, _____, ______<br \/>\nAnswer:<br \/>\nGIVEN:<br \/>\n463, 473, ____, 493, ____, _____, ______<br \/>\nSUBTRACTION:<br \/>\n=&gt; 473- 463 = 10(PLACE VALUE)<br \/>\nADDITION:<br \/>\n463 + 10 = 473<br \/>\n473 + 10 = 483<br \/>\n483 + 10 = 493<br \/>\n493 + 10 = 503<br \/>\n503 + 10 = 513<br \/>\n513 + 10 = 523<br \/>\nHence, the missing number sequence = 463, 473, 483, 493, 503, 513, 523.<\/p>\n<h3><a id=\"Lesson_9.8_Add_Up_to_4_Two-Digit_Numbers\"><\/a>Lesson 9.8 Add Up to 4 Two-Digit Numbers<\/h3>\n<p><strong>Explore and Grow<\/strong><\/p>\n<p>Use any strategy to solve.<br \/>\nNewton has 19 red balloons, 23 green balloons,31 yellow balloons, and 17 blue balloons. How many balloons does he have in all?<br \/>\n_____ balloons<br \/>\nAnswer:<br \/>\nGIVEN:<br \/>\nNumber of red balloons Newton has = 19<br \/>\nNumber of green balloons Newton has = 23<br \/>\nNumber of yellow balloons Newton has = 31<br \/>\nNumber of blue balloons Newton has = 17<br \/>\nADDITION:<br \/>\nTotal number of balloons Newton has = Number of red balloons Newton has + Number of green balloons Newton has + Number of yellow balloons Newton has\u00a0 + Number of blue balloons Newton has<br \/>\n= 19 + 23 + 31 + 17<br \/>\n= 42 + 31 + 17<br \/>\n= 73 + 17<br \/>\n= 90.<br \/>\nHence, Total number of balloons Newton has = 90.<\/p>\n<p>Compare your strategy to your partner\u2019s strategy. How are your strategies the same? How are they different?<br \/>\n______________________<br \/>\n_______________________<br \/>\nAnswer:<br \/>\nStrategy of mine and my friends are different yet the process to calculate the sum of the numbers is same.<\/p>\n<p><strong>Show and Grow<\/strong><\/p>\n<p>Question 1.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-20930\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Solutions-Grade-2-Chapter-9-Add-Numbers-within-1000-9.8-1.png\" alt=\"Big Ideas Math Solutions Grade 2 Chapter 9 Add Numbers within 1,000 9.8 1\" width=\"100\" height=\"114\" \/><br \/>\nAnswer:<br \/>\nGIVEN:<br \/>\n26 + 88 + 32 = ???<br \/>\nADDITION:<br \/>\n26 + 88 + 32<br \/>\n= 114 + 32<br \/>\n= 146.<br \/>\nHence, Sum of 26 + 88 + 32 = 146.<\/p>\n<p>Question 2.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-20931\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Solutions-Grade-2-Chapter-9-Add-Numbers-within-1000-9.8-2.png\" alt=\"Big Ideas Math Solutions Grade 2 Chapter 9 Add Numbers within 1,000 9.8 2\" width=\"106\" height=\"109\" \/><br \/>\nAnswer:<br \/>\nGIVEN:<br \/>\n60 + 15 + 55 = ???<br \/>\nADDITION:<br \/>\n60 + 15 + 55<br \/>\n= 75 + 55<br \/>\n= 130.<br \/>\nHence, Sum of 60 + 15 + 55 = 130.<\/p>\n<p>Question 3.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-20932\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Solutions-Grade-2-Chapter-9-Add-Numbers-within-1000-9.8-3.png\" alt=\"Big Ideas Math Solutions Grade 2 Chapter 9 Add Numbers within 1,000 9.8 3\" width=\"101\" height=\"121\" \/><br \/>\nAnswer:<br \/>\nGIVEN:<br \/>\n77 + 96 +24 = ???<br \/>\nADDITION:<br \/>\n77 + 96 +24<br \/>\n= 173 + 24<br \/>\n= 197.<br \/>\nHence, Sum of 77 + 96 +24 = 197.<\/p>\n<p>Question 4.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-20933\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Solutions-Grade-2-Chapter-9-Add-Numbers-within-1000-9.8-4.png\" alt=\"Big Ideas Math Solutions Grade 2 Chapter 9 Add Numbers within 1,000 9.8 4\" width=\"102\" height=\"141\" \/><br \/>\nAnswer:<br \/>\nGIVEN:<br \/>\n57 + 13 + 33+ 48 = ???<br \/>\nADDITION:<br \/>\n57 + 13 + 33+ 48<br \/>\n= 70 + 33+ 48<br \/>\n= 103 + 48<br \/>\n= 151.<br \/>\nHence, Sum of 57 + 13 + 33+ 48 = 151.<\/p>\n<p>Question 5.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-20935\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Solutions-Grade-2-Chapter-9-Add-Numbers-within-1000-9.8-5.png\" alt=\"Big Ideas Math Solutions Grade 2 Chapter 9 Add Numbers within 1,000 9.8 5\" width=\"103\" height=\"140\" \/><br \/>\nAnswer:<br \/>\nGIVEN:<br \/>\n89 + 62 +10 + 51 = ???<br \/>\nADDITION:<br \/>\n89 + 62 +10 + 51<br \/>\n= 151 + 10 + 51<br \/>\n= 161 + 51<br \/>\n= 212.<br \/>\nHence, Sum of 89 + 62 +10 + 51 = 212.<\/p>\n<p>Question 6.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-20936\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Solutions-Grade-2-Chapter-9-Add-Numbers-within-1000-9.8-6.png\" alt=\"Big Ideas Math Solutions Grade 2 Chapter 9 Add Numbers within 1,000 9.8 6\" width=\"107\" height=\"148\" \/><br \/>\nAnswer:<br \/>\nGIVEN:<br \/>\n95 + 71 + 46 + 53 = ???<br \/>\nADDITION:<br \/>\n95 + 71 + 46 + 53<br \/>\n= 166 + 46 + 53<br \/>\n= 212 + 53<br \/>\n= 265.<br \/>\nHence, Sum of 95 + 71 + 46 + 53 = 265.<\/p>\n<p><strong>Apply and Grow: Practice<\/strong><\/p>\n<p>Question 7.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-20937\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Solutions-Grade-2-Chapter-9-Add-Numbers-within-1000-9.8-7.png\" alt=\"Big Ideas Math Solutions Grade 2 Chapter 9 Add Numbers within 1,000 9.8 7\" width=\"94\" height=\"99\" \/><br \/>\nAnswer:<br \/>\nGIVEN:<br \/>\n17 + 84 + 23 = ???<br \/>\nADDITION:<br \/>\n17 + 84 + 23<br \/>\n= 101 + 23<br \/>\n= 124.<br \/>\nHence, Sum of 17 + 84 + 23 = 124.<\/p>\n<p>Question 8.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-20938\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Solutions-Grade-2-Chapter-9-Add-Numbers-within-1000-9.8-8.png\" alt=\"Big Ideas Math Solutions Grade 2 Chapter 9 Add Numbers within 1,000 9.8 8\" width=\"96\" height=\"110\" \/><br \/>\nAnswer:<br \/>\nGIVEN:<br \/>\n21 + 42 + 39 = ???<br \/>\nADDITION:<br \/>\n21 + 42 + 39<br \/>\n= 63 + 39<br \/>\n= 102.<br \/>\nHence, Sum of 21 + 42 + 39 = 102.<\/p>\n<p>Question 9.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-20939\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Solutions-Grade-2-Chapter-9-Add-Numbers-within-1000-9.8-9.png\" alt=\"Big Ideas Math Solutions Grade 2 Chapter 9 Add Numbers within 1,000 9.8 9\" width=\"100\" height=\"115\" \/><br \/>\nAnswer:<br \/>\nGIVEN:<br \/>\n92 + 58 + 19 = ???<br \/>\nADDITION:<br \/>\n92 + 58 + 19<br \/>\n= 150 + 19<br \/>\n= 169.<br \/>\nHence, Sum of 92 + 58 + 19 = 169.<\/p>\n<p>Question 10.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-20940\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Solutions-Grade-2-Chapter-9-Add-Numbers-within-1000-9.8-10.png\" alt=\"Big Ideas Math Solutions Grade 2 Chapter 9 Add Numbers within 1,000 9.8 10\" width=\"98\" height=\"137\" \/><br \/>\nAnswer:<br \/>\nGIVEN:<br \/>\n58 + 12 + 6 + 24 = ???<br \/>\nADDITION:<br \/>\n58 + 12 + 6 + 24<br \/>\n= 70 + 6 + 24<br \/>\n= 76 + 24<br \/>\n= 100.<br \/>\nHence, Sum of 58 + 12 + 6 + 24 = 100.<\/p>\n<p>Question 11.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-20941\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Solutions-Grade-2-Chapter-9-Add-Numbers-within-1000-9.8-11.png\" alt=\"Big Ideas Math Solutions Grade 2 Chapter 9 Add Numbers within 1,000 9.8 11\" width=\"94\" height=\"147\" \/><br \/>\nAnswer:<br \/>\nGIVEN:<br \/>\n42 + 26 + 33 + 14 = ???<br \/>\nADDITION:<br \/>\n42 + 26 + 33 + 14<br \/>\n= 68 + 33 + 14<br \/>\n= 101 + 14<br \/>\n= 115.<br \/>\nHence, Sum of 42 + 26 + 33 + 14 = 115.<\/p>\n<p>Question 12.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-20942\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Solutions-Grade-2-Chapter-9-Add-Numbers-within-1000-9.8-12.png\" alt=\"Big Ideas Math Solutions Grade 2 Chapter 9 Add Numbers within 1,000 9.8 12\" width=\"95\" height=\"144\" \/><br \/>\nAnswer:<br \/>\nGIVEN:<br \/>\n13 + 52 + 37 + 48 = ???<br \/>\nADDITION:<br \/>\n13 + 52 + 37 + 48<br \/>\n= 65 + 37 + 48<br \/>\n= 102 + 48<br \/>\n= 150.<br \/>\nHence, Sum of 13 + 52 + 37 + 48 = 150.<\/p>\n<p>Question 13.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-20943\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Solutions-Grade-2-Chapter-9-Add-Numbers-within-1000-9.8-13.png\" alt=\"Big Ideas Math Solutions Grade 2 Chapter 9 Add Numbers within 1,000 9.8 13\" width=\"94\" height=\"142\" \/><br \/>\nAnswer:<br \/>\nGIVEN:<br \/>\n64 + 20 + 35 + 56 = ???<br \/>\nADDITION:<br \/>\n64 + 20 + 35 + 56<br \/>\n= 84 + 35 + 56<br \/>\n=\u00a0 119 + 56<br \/>\n= 175.<br \/>\nHence, Sum of 64 + 20 + 35 + 56 = 175.<\/p>\n<p>Question 14.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-20944\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Solutions-Grade-2-Chapter-9-Add-Numbers-within-1000-9.8-14.png\" alt=\"Big Ideas Math Solutions Grade 2 Chapter 9 Add Numbers within 1,000 9.8 14\" width=\"101\" height=\"138\" \/><br \/>\nAnswer:<br \/>\nGIVEN:<br \/>\n36 + 92 + 40 + 15 = ???<br \/>\nADDITION:<br \/>\n36 + 92 + 40 + 15<br \/>\n= 128 + 40 + 15<br \/>\n= 168 + 15<br \/>\n= 183.<br \/>\nHence, Sum of 36 + 92 + 40 + 15 = 183.<\/p>\n<p>Question 15.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-20945\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Solutions-Grade-2-Chapter-9-Add-Numbers-within-1000-9.8-15.png\" alt=\"Big Ideas Math Solutions Grade 2 Chapter 9 Add Numbers within 1,000 9.8 15\" width=\"100\" height=\"141\" \/><br \/>\nAnswer:<br \/>\nGIVEN:<br \/>\n19 +\u00a0 3 + 47 + 25 = ???<br \/>\nADDITION:<br \/>\n19 +\u00a0 3 + 47 + 25<br \/>\n= 22 + 47 + 25<br \/>\n= 69 + 25<br \/>\n= 94.<br \/>\nHence, Sum of\u00a0 19 + 3 + 47 + 25 = 94.<\/p>\n<p>Question 16.<br \/>\n<strong>Number Sense<\/strong><br \/>\nSolve. Which two digits in the ones place did you add first? Explain.<br \/>\n7 + 15 + 36 + 25 = _______<br \/>\n______________________<br \/>\n______________________<br \/>\nAnswer:<br \/>\nGIVEN:<br \/>\n7 + 15 + 36 + 25 = ???<br \/>\nThe two digits in ones place added first are 5 number.<br \/>\n= 15 + 25 + 36 + 7<br \/>\n= 40 + 36 + 7<br \/>\n= 76 + 7<br \/>\n= 83.<br \/>\nHence, Sum of 7 + 15 + 36 + 25\u00a0 = 83.<\/p>\n<p><strong>Think and Grow: Modeling Real Life<\/strong><\/p>\n<p>How many seeds does your class plant in all?<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-20946\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Solutions-Grade-2-Chapter-9-Add-Numbers-within-1000-9.8-16.png\" alt=\"Big Ideas Math Solutions Grade 2 Chapter 9 Add Numbers within 1,000 9.8 16\" width=\"326\" height=\"173\" srcset=\"https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Solutions-Grade-2-Chapter-9-Add-Numbers-within-1000-9.8-16.png 326w, https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Solutions-Grade-2-Chapter-9-Add-Numbers-within-1000-9.8-16-300x159.png 300w\" sizes=\"(max-width: 326px) 100vw, 326px\" \/><br \/>\nAddition problem:<br \/>\n_____ seeds<br \/>\nAnswer:<br \/>\nGIVEN:<br \/>\nNumber of Sunflower plant seeds = 81<br \/>\nNumber of Marigold plant seeds = 92<br \/>\nNumber of Pumpkin plant seeds = 83<br \/>\nNumber of Tomato plant seeds = 78<br \/>\nADDITION:<br \/>\nTotal number of plants seeds = Number of Sunflower plant seeds + Number of Marigold plant seeds + Number of Pumpkin plant seeds + Number of Tomato plant seeds<br \/>\n= 81 + 92 + 83 + 78<br \/>\n= 173 + 83 + 78<br \/>\n= 256 + 78<br \/>\n= 334.<br \/>\nHence, the total number of plants seeds = 334.<\/p>\n<p><strong>Show and Grow<\/strong><\/p>\n<p>Question 17.<br \/>\nHow many fish are there in all?<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-20947\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Solutions-Grade-2-Chapter-9-Add-Numbers-within-1000-9.8-17.png\" alt=\"Big Ideas Math Solutions Grade 2 Chapter 9 Add Numbers within 1,000 9.8 17\" width=\"592\" height=\"202\" srcset=\"https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Solutions-Grade-2-Chapter-9-Add-Numbers-within-1000-9.8-17.png 592w, https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Solutions-Grade-2-Chapter-9-Add-Numbers-within-1000-9.8-17-300x102.png 300w\" sizes=\"(max-width: 592px) 100vw, 592px\" \/><br \/>\nAnswer:<br \/>\nGIVEN:<br \/>\nNumber of Angelfish = 43<br \/>\nNumber of Rainbow fish = 37<br \/>\nNumber of Swordtail = 29<br \/>\nNumber of Tetra = 59<br \/>\nTotal Number of all fishes = Number of Angelfish + Number of Rainbow fish + Number of Swordtail + Number of Tetra<br \/>\n= 43 + 37 + 29 + 59<br \/>\n= 80 + 29 + 59<br \/>\n= 109 + 59<br \/>\n= 168.<br \/>\nHence, Total Number of all fishes = 168.<\/p>\n<p>Question 18.<br \/>\n<strong>DIG DEEPER!<\/strong><br \/>\nYou need 100 craft sticks for a project. You have a 24-pack, a 32-pack, and a 36-pack. How many more craft sticks do you need?<br \/>\n______ more craft sticks<br \/>\nAnswer:<br \/>\nGIVEN:<br \/>\nNumber of craft sticks needed for a project = 100<br \/>\nNumber of packs in first pack = 24<br \/>\nNumber of packs in second pack = 32<br \/>\nNumber of packs in third pack = 36<br \/>\nADDITION:<br \/>\nTotal number of packs in all three packs = Number of packs in first pack + Number of packs in second pack + Number of packs in third pack = 24 + 32 + 36 = 92.<br \/>\nSUBTRACTION:<br \/>\nNumber of stickers needed = Number of craft sticks needed for a project &#8211; Total number of packs in all three packs<br \/>\n= 100 &#8211; 92<br \/>\n=8.<br \/>\nHence, Number of stickers needed = 8.<\/p>\n<h3><a id=\"Add_Up_to_4_Two-Digit_Numbers_Homework_&amp;_Practice_9.8\"><\/a>Add Up to 4 Two-Digit Numbers Homework &amp; Practice 9.8<\/h3>\n<p>Question 1.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-20948\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Solutions-Grade-2-Chapter-9-Add-Numbers-within-1000-9.8-18.png\" alt=\"Big Ideas Math Solutions Grade 2 Chapter 9 Add Numbers within 1,000 9.8 18\" width=\"85\" height=\"112\" \/><br \/>\nAnswer:<br \/>\nGIVEN:<br \/>\n43 + 62 + 18 =???<br \/>\nADDITION:<br \/>\n43 + 62 + 18<br \/>\n=105 + 18<br \/>\n= 123.<br \/>\nHence, Sum of 43 + 62 + 18 = 123.<\/p>\n<p>Question 2.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-20949\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Solutions-Grade-2-Chapter-9-Add-Numbers-within-1000-9.8-19.png\" alt=\"Big Ideas Math Solutions Grade 2 Chapter 9 Add Numbers within 1,000 9.8 19\" width=\"102\" height=\"105\" \/><br \/>\nAnswer:<br \/>\nGIVEN:<br \/>\n74 + 30 +69 = ???<br \/>\nADDITION:<br \/>\n74 + 30 +69<br \/>\n= 104 + 69<br \/>\n= 173.<br \/>\nHence, Sum of 74 + 30 +69 = 173.<\/p>\n<p>Question 3.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-20950\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Solutions-Grade-2-Chapter-9-Add-Numbers-within-1000-9.8-20.png\" alt=\"Big Ideas Math Solutions Grade 2 Chapter 9 Add Numbers within 1,000 9.8 20\" width=\"94\" height=\"107\" \/><br \/>\nAnswer:<br \/>\nGIVEN:<br \/>\n34 + 57 + 27 = ???<br \/>\nADDITION:<br \/>\n34 + 57 + 27<br \/>\n= 91 + 27<br \/>\n= 118.<br \/>\nHence, Sum of 34 + 57 + 27 = 118.<\/p>\n<p>Question 4.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-20951\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Solutions-Grade-2-Chapter-9-Add-Numbers-within-1000-9.8-21.png\" alt=\"Big Ideas Math Solutions Grade 2 Chapter 9 Add Numbers within 1,000 9.8 21\" width=\"94\" height=\"138\" \/><br \/>\nAnswer:<br \/>\nGIVEN:<br \/>\n51 + 16 + 6 + 24 = ???<br \/>\nADDITION:<br \/>\n51 + 16 + 6 + 24<br \/>\n= 67 + 6 + 24<br \/>\n= 73 + 24<br \/>\n= 97.<br \/>\nHence, Sum of 51 + 16 + 6 + 24 = 97.<\/p>\n<p>Question 5.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-20953\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Solutions-Grade-2-Chapter-9-Add-Numbers-within-1000-9.8-22.png\" alt=\"Big Ideas Math Solutions Grade 2 Chapter 9 Add Numbers within 1,000 9.8 22\" width=\"95\" height=\"144\" \/><br \/>\nAnswer:<br \/>\nGIVEN:<br \/>\n84 + 62 + 10 + 31 = ???<br \/>\nADDITION:<br \/>\n84 + 62 + 10 + 31<br \/>\n= 146 + 10 + 31<br \/>\n= 156 + 31<br \/>\n= 187.<br \/>\nHence, Sum of 84 + 62 + 10 + 31 = 187.<\/p>\n<p>Question 6.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-20954\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Solutions-Grade-2-Chapter-9-Add-Numbers-within-1000-9.8-23.png\" alt=\"Big Ideas Math Solutions Grade 2 Chapter 9 Add Numbers within 1,000 9.8 23\" width=\"107\" height=\"142\" \/><br \/>\nAnswer:<br \/>\nGIVEN:<br \/>\n66 + 49 + 34 +21 = ???<br \/>\nADDITION:<br \/>\n66 + 49 + 34 +21<br \/>\n= 115 + 34 + 21<br \/>\n= 149 + 21<br \/>\n= 170.<br \/>\nHence, Sum of 66 + 49 + 34 +21 = 170.<\/p>\n<p>Question 7.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-20955\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Solutions-Grade-2-Chapter-9-Add-Numbers-within-1000-9.8-24.png\" alt=\"Big Ideas Math Solutions Grade 2 Chapter 9 Add Numbers within 1,000 9.8 24\" width=\"98\" height=\"134\" \/><br \/>\nAnswer:<br \/>\nGIVEN:<br \/>\n50 + 26 + 45 + 44 = ???<br \/>\nADDITION:<br \/>\n50 + 26 + 45 + 44<br \/>\n= 76 + 45 + 44<br \/>\n= 121 + 44<br \/>\n= 165.<br \/>\nHence, Sum of 50 + 26 + 45 + 44 = 165.<\/p>\n<p>Question 8.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-20956\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Solutions-Grade-2-Chapter-9-Add-Numbers-within-1000-9.8-25.png\" alt=\"Big Ideas Math Solutions Grade 2 Chapter 9 Add Numbers within 1,000 9.8 25\" width=\"102\" height=\"136\" \/><br \/>\nAnswer:<br \/>\nGIVEN:<br \/>\n73 + 14 + 26 + 27 = ???<br \/>\nADDITION:<br \/>\n73 + 14 + 26 + 27<br \/>\n= 87 + 26 + 27<br \/>\n= 113 + 27<br \/>\n= 140.<br \/>\nHence, Sum of 73 + 14 + 26 + 27 = 140.<\/p>\n<p>Question 9.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-20957\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Solutions-Grade-2-Chapter-9-Add-Numbers-within-1000-9.8-26.png\" alt=\"Big Ideas Math Solutions Grade 2 Chapter 9 Add Numbers within 1,000 9.8 26\" width=\"107\" height=\"144\" \/><br \/>\nAnswer:<br \/>\nGIVEN:<br \/>\n65 + 8 + 32 + 71 = ???<br \/>\nADDITION:<br \/>\n65 + 8 + 32 + 71<br \/>\n= 73 + 32 + 71<br \/>\n= 105 + 71<br \/>\n= 176.<br \/>\nHence, Sum of 65 + 8 + 32 + 71 = 176.<\/p>\n<p>Question 10.<br \/>\n<strong>Number Sense<\/strong><br \/>\nFind the missing number.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-20958\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Solutions-Grade-2-Chapter-9-Add-Numbers-within-1000-9.8-27.png\" alt=\"Big Ideas Math Solutions Grade 2 Chapter 9 Add Numbers within 1,000 9.8 27\" width=\"300\" height=\"59\" \/><br \/>\nAnswer:<br \/>\nGIVEN:<br \/>\n38 + 41 + ____ + 52 = 159.<br \/>\nLet the missing number be X.<br \/>\nADDITION:<br \/>\n38 + 41 + X + 52 = 159<br \/>\n=&gt; 79 + X + 52 = 159<br \/>\n=&gt; X + 131 = 159<br \/>\n=&gt; X = 159 &#8211; 131<br \/>\n=&gt; X = 28.<br \/>\nEQUATION:<br \/>\n38 + 41 + 28 + 52 = 159.<br \/>\nHence, missing number = 28.<\/p>\n<p>Question 11.<br \/>\n<strong>Modeling Real Life<\/strong><br \/>\nHow many sandwiches are there in all?<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-20959\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Solutions-Grade-2-Chapter-9-Add-Numbers-within-1000-9.8-28.png\" alt=\"Big Ideas Math Solutions Grade 2 Chapter 9 Add Numbers within 1,000 9.8 28\" width=\"558\" height=\"169\" srcset=\"https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Solutions-Grade-2-Chapter-9-Add-Numbers-within-1000-9.8-28.png 558w, https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Solutions-Grade-2-Chapter-9-Add-Numbers-within-1000-9.8-28-300x91.png 300w\" sizes=\"(max-width: 558px) 100vw, 558px\" \/><br \/>\n______ sandwiches<br \/>\nAnswer:<br \/>\nGIVEN:<br \/>\nNumber of Turkey Sandwiches = 59<br \/>\nNumber of Ham Sandwiches = 23<br \/>\nNumber of Cheese Sandwiches = 35<br \/>\nNumber of Peanut Butter Sandwiches = 45<br \/>\nADDITION:<br \/>\nTotal number of all sandwiches = Number of Turkey Sandwiches + Number of Ham Sandwiches + Number of Cheese Sandwiches + Number of Peanut Butter Sandwiches<br \/>\n= 59 + 23 +35 + 45<br \/>\n= 162.<br \/>\nHence, the total number of all sandwiches = 162.<\/p>\n<p>Question 12.<br \/>\n<strong>DIG DEEPER!<\/strong><br \/>\nYou need 210 votes to win a school election. You receive 67 votes from the first grade and 93 votes from the second grade. How many more votes do you need?<br \/>\n____ votes<br \/>\nAnswer:<br \/>\nNumber of votes required to win school election = 210<br \/>\nNumber of votes received from first grade = 67<br \/>\nNumber of votes received from second grade = 93<br \/>\nADDITION:<br \/>\nTotal number of votes received from first and second grade = 67 + 93 = 160<br \/>\nSUBTRACTION:<br \/>\nNumber of votes required to win the election = Number of votes required to win school election &#8211; Total number of votes received from first and second grade<br \/>\n= 210 &#8211; 160 = 50.<br \/>\nHence, Number of votes required to win the election =\u00a0 50.<\/p>\n<p><strong>Review &amp; Refresh<\/strong><\/p>\n<p><strong>Write a number that makes the statement true.<\/strong><br \/>\nQuestion 13.<br \/>\n865 &lt; _____<br \/>\nAnswer:<br \/>\nGIVEN:<br \/>\n865 &lt; _____.<br \/>\nHence, 865 &lt; 900.<\/p>\n<p>Question 14. _____ &gt; 374<br \/>\nAnswer:<br \/>\nGIVEN: _____ &gt; 374<br \/>\nHence,\u00a0 415 &gt; 374.<\/p>\n<p>Question 15.<br \/>\n736 = ____<br \/>\nAnswer:<br \/>\nGIVEN:<br \/>\n736 = _____<br \/>\nHence, 736 = 736.<\/p>\n<p>Question 16.<br \/>\n451 &gt; _____<br \/>\nAnswer:<br \/>\nGIVEN:<br \/>\n451 &gt; ______<br \/>\nHence, 451 &gt; 389.<\/p>\n<h3><a id=\"Lesson_9.9_Explain_Addition_Strategies\"><\/a>Lesson 9.9 Explain Addition Strategies<\/h3>\n<p><strong>Explore and Grow<\/strong><\/p>\n<p>Use two different strategies to find 274 + 519.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-20961\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Answer-Key-Grade-2-Chapter-9-Add-Numbers-within-1000-9.9-1.png\" alt=\"Big Ideas Math Answer Key Grade 2 Chapter 9 Add Numbers within 1,000 9.9 1\" width=\"304\" height=\"203\" srcset=\"https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Answer-Key-Grade-2-Chapter-9-Add-Numbers-within-1000-9.9-1.png 304w, https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Answer-Key-Grade-2-Chapter-9-Add-Numbers-within-1000-9.9-1-300x200.png 300w\" sizes=\"(max-width: 304px) 100vw, 304px\" \/><br \/>\nAnswer:<br \/>\nONE WAY :COMPENSATION METHOD<br \/>\n274 + 519 = ???<br \/>\nAdd 6 to 274.<br \/>\nSubtract 6 from 519.<br \/>\n274\u00a0 \u00a0 \u00a0+\u00a0 \u00a0 \u00a0519<br \/>\n+\u00a0 6\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0&#8211;\u00a0 \u00a06<br \/>\n280\u00a0 \u00a0 \u00a0+\u00a0 \u00a0 \u00a0513\u00a0 = 793.<br \/>\nHence, Sum of 274 + 519 = 793.<br \/>\nOTHER WAY: USE MODELS TO ADD<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-25518\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Book-2nd-Grade-Answer-Key-Chapter-9-add-Numbers-within-1000-Lesson-9.9-Explain-Addition-Strategies-.png\" alt=\"\" width=\"190\" height=\"187\" \/><br \/>\nHence, Sum of 274 + 519 = 793.<br \/>\nExplain why you chose one of your strategies.<br \/>\n_________________________<br \/>\n_________________________<br \/>\nAnswer:<br \/>\nI choose COMPENSATION METHOD and USE MODELS TO ADD for adding numbers because its easy to understand and easy to calculate the addition also.<\/p>\n<p><strong>Show and Grow<\/strong><\/p>\n<p><strong>Choose any strategy to solve. Explain how you solved.<\/strong><br \/>\nQuestion 1.<br \/>\n379 + 240 = ____<br \/>\n___________________<br \/>\n____________________<br \/>\nAnswer:<br \/>\nGIVEN:<br \/>\n379 + 240 = ???<br \/>\nADDITION:<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-25519\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Book-2nd-Grade-Answer-Key-Chapter-9-add-Numbers-within-1000-9.9-show-and-grow1.png\" alt=\"\" width=\"207\" height=\"201\" \/><br \/>\nHence, Sum of 379 + 240 = 619.<\/p>\n<p><strong>Apply and Grow: Practice<\/strong><\/p>\n<p><strong>Choose any strategy to solve. Explain how you solved.<\/strong><br \/>\nQuestion 2.<br \/>\n426 + 355 = _____<br \/>\n___________________<br \/>\n___________________<br \/>\nAnswer:<br \/>\nGIVEN:<br \/>\n426 + 355 = ???<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-25520\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Book-2nd-Grade-Answer-Key-Chapter-9-add-Numbers-within-1000-9.9-Apply-Grow-Practice-2.png\" alt=\"\" width=\"196\" height=\"216\" \/><br \/>\nHence, Sum of 426 + 355 = 781.<\/p>\n<p>Question 3.<br \/>\n671 + 219 = _____<br \/>\n____________________<br \/>\n____________________<br \/>\nAnswer:<br \/>\nGIVEN:<br \/>\n671 + 219 = ???<br \/>\nADDITION:<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-25521\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Book-2nd-Grade-Answer-Key-Chapter-9-add-Numbers-within-1000-9.9-Apply-Grow-Practice-3.png\" alt=\"\" width=\"197\" height=\"195\" \/><br \/>\nHence, Sum of 671 + 219 = 890.<\/p>\n<p>Question 4.<br \/>\n<strong>YOU BE THE TEACHER<\/strong><br \/>\nYour friend uses compensation to solve. Is your friend correct? Explain.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-20962\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Answer-Key-Grade-2-Chapter-9-Add-Numbers-within-1000-9.9-2.png\" alt=\"Big Ideas Math Answer Key Grade 2 Chapter 9 Add Numbers within 1,000 9.9 2\" width=\"260\" height=\"100\" \/><br \/>\n____________________<br \/>\n____________________<br \/>\nAnswer:<br \/>\nGIVEN:<br \/>\n182 + 506 = 688<br \/>\nADDITION:<br \/>\n182\u00a0 \u00a0 \u00a0+\u00a0 \u00a0 506<br \/>\n+6\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0-6<br \/>\n188\u00a0 \u00a0 \u00a0+\u00a0 \u00a0 500 = 688<br \/>\nHence, my friend compensation is correct because sum of 182 + 506 = 688.<\/p>\n<p><strong>Think and Grow: Modeling Real Life<\/strong><\/p>\n<p>Choose any strategy to solve. Explain how you solved.<br \/>\nYou have 567 pennies in a piggy bank and 428 in a jar. How many pennies do you have in all?<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-20963\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Answer-Key-Grade-2-Chapter-9-Add-Numbers-within-1000-9.9-3.png\" alt=\"Big Ideas Math Answer Key Grade 2 Chapter 9 Add Numbers within 1,000 9.9 3\" width=\"96\" height=\"92\" \/><br \/>\nAddition equation:<br \/>\n______ pennies<br \/>\n_______________________<br \/>\n_______________________<br \/>\nAnswer:<br \/>\nGIVEN:<br \/>\nNumber of pennies in\u00a0 piggy bank = 567<br \/>\nNumber of pennies in a jar = 428<br \/>\nADDITION:<br \/>\nTotal number of pennies in piggy bank and a jar = Number of pennies in\u00a0 piggy bank\u00a0 + Number of pennies in a jar<br \/>\n= 567 + 428 =\u00a0 995.<br \/>\nHence, the total number of pennies in piggy bank and a jar = 995.<\/p>\n<p><strong>Show and Grow<\/strong><\/p>\n<p><strong>Choose any strategy to solve. Explain how you solved.<\/strong><br \/>\nQuestion 5.<br \/>\nA beekeeper has 494 worker bees and 376 drone bees. How many bees does he have in all?<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-20964\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Answer-Key-Grade-2-Chapter-9-Add-Numbers-within-1000-9.9-4.png\" alt=\"Big Ideas Math Answer Key Grade 2 Chapter 9 Add Numbers within 1,000 9.9 4\" width=\"78\" height=\"64\" \/><br \/>\n______ bees<br \/>\n___________________<br \/>\n___________________<br \/>\nAnswer:<br \/>\nGIVEN:<br \/>\nNumber of worker bees a beekeeper has = 494<br \/>\nNumber of drone bees a beekeeper has = 376<br \/>\nADDITION:<br \/>\nTotal number of worker bees and drone bees\u00a0 a beekeeper has = 494 + 376 = 870<br \/>\nHence, the total number of worker bees and drone bees a beekeeper has = 870.<\/p>\n<p>Question 6.<br \/>\nThere are 365 days in one year. How many days are there in two years?<br \/>\n______ days<br \/>\n______________________<br \/>\n______________________<br \/>\nAnswer:<br \/>\nCONVERTION:<br \/>\n1 YEAR = 365 DAYS<br \/>\n2 YEARS =????<br \/>\nMULTIPLICATION:<br \/>\n=&gt; 2 x 365 = 730 days.<br \/>\nHence, Number of days in 2 years = 730.<\/p>\n<h3><a id=\"Explain_Addition_Strategies_Homework_&amp;_Practice_9.9\"><\/a>Explain Addition Strategies Homework &amp; Practice 9.9<\/h3>\n<p><strong>Choose any strategy to solve. Explain how you solved.<\/strong><br \/>\nQuestion 1.<br \/>\n656 + 181 = _____<br \/>\n_________________________<br \/>\n_________________________<br \/>\nAnswer:<br \/>\nGIVEN:<br \/>\n656 + 181 = ???<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-25325\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Book-2nd-Grade-Answer-Key-Chapter-9-add-Numbers-within-1000-Explain-Addition-Strategies-Homework-Practice-9.9.png\" alt=\"\" width=\"167\" height=\"261\" \/><br \/>\nHence, Sum of 656 + 181 = 837.<\/p>\n<p>Question 2.<br \/>\n567 + 348 = ______<br \/>\n______________________<br \/>\n______________________<br \/>\nAnswer:<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-25328\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Book-2nd-Grade-Answer-Key-Chapter-9-add-Numbers-within-1000-Explain-Addition-Strategies-Homework-Practice-9.9-2.png\" alt=\"\" width=\"223\" height=\"289\" \/><br \/>\nHence, Sum of 567 + 348 =915.<\/p>\n<p>Question 3.<br \/>\n<strong>DIG DEEPER!<\/strong><br \/>\nFind the missing numbers.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-20965\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Answer-Key-Grade-2-Chapter-9-Add-Numbers-within-1000-9.9-5.png\" alt=\"Big Ideas Math Answer Key Grade 2 Chapter 9 Add Numbers within 1,000 9.9 5\" width=\"518\" height=\"100\" srcset=\"https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Answer-Key-Grade-2-Chapter-9-Add-Numbers-within-1000-9.9-5.png 518w, https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Answer-Key-Grade-2-Chapter-9-Add-Numbers-within-1000-9.9-5-300x58.png 300w\" sizes=\"(max-width: 518px) 100vw, 518px\" \/><br \/>\nAnswer:<br \/>\nSUBTRACTION:<br \/>\n765 &#8211; 541 = 224<br \/>\n870 &#8211; 358 = 512<br \/>\n542 &#8211; 108 = 434<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-25322\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Book-2nd-Grade-Answer-Key-Chapter-9-add-Numbers-within-1000-Explain-Addition-Strategies-Homework-Practice-9.9-3.png\" alt=\"\" width=\"692\" height=\"179\" srcset=\"https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Book-2nd-Grade-Answer-Key-Chapter-9-add-Numbers-within-1000-Explain-Addition-Strategies-Homework-Practice-9.9-3.png 692w, https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Book-2nd-Grade-Answer-Key-Chapter-9-add-Numbers-within-1000-Explain-Addition-Strategies-Homework-Practice-9.9-3-300x78.png 300w\" sizes=\"(max-width: 692px) 100vw, 692px\" \/><br \/>\nHence, 541 + 224 = 765<br \/>\n358 + 512 = 870<br \/>\n108 + 434 = 542.<\/p>\n<p>Choose any strategy to solve. Explain how you solved.<br \/>\nQuestion 4.<br \/>\n<strong>Modeling Real Life<\/strong><br \/>\nA farmer has 415 tomato plants and 250 pepper plants. How many plants does he have in all?<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-20966\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Answer-Key-Grade-2-Chapter-9-Add-Numbers-within-1000-9.9-6.png\" alt=\"Big Ideas Math Answer Key Grade 2 Chapter 9 Add Numbers within 1,000 9.9 6\" width=\"114\" height=\"67\" \/><br \/>\n_____ plants<br \/>\n___________________<br \/>\n___________________<br \/>\nAnswer:<br \/>\nNumber of tomatoes plants farmer has = 415<br \/>\nNumber of pepper plants farmer has = 250<br \/>\nADDITION:<br \/>\nTotal number of tomatoes plants and pepper plants farmer has = 415 + 250 = 665<br \/>\nHence , the total number of tomatoes plants and pepper plants farmer has = 665.<\/p>\n<p>Question 5.<br \/>\n<strong>Modeling Real Life<\/strong><br \/>\nYou practice the trumpet for 45 minutes each day. How many minutes do you practice in 4 days?<br \/>\n______ minutes<br \/>\n_________________________<br \/>\n________________________<br \/>\nAnswer:<br \/>\nGIVEN:<br \/>\nPractice time of the trumpet each day = 45 minutes<br \/>\nPractice time of the trumpet in 4 days= ???<br \/>\nMULTIPLICATION:<br \/>\n=&gt; 4 x 45 = 180 minutes.<br \/>\nHence, Practice time of the trumpet in 4 days=\u00a0 180 minutes.<\/p>\n<p><strong>Review &amp; Refresh<\/strong><\/p>\n<p>Question 6.<br \/>\n97 \u2212 71 = _____<br \/>\nAnswer:<br \/>\nGIVEN:<br \/>\n97 &#8211; 71 = ???<br \/>\nDIFFERENCE:<br \/>\n97 &#8211; 71 =26.<br \/>\nHence, 97 &#8211; 71 =26.<\/p>\n<p>Question 7.<br \/>\n56 \u2212 14 = _____<br \/>\nAnswer:<br \/>\nGIVEN:<br \/>\n56 &#8211; 14 = ???<br \/>\nDIFFERENCE:<br \/>\n56 &#8211; 14 = 42<br \/>\nHence, 56 &#8211; 14 = 42.<\/p>\n<h3><a id=\"Add_Numbers_within_1,000_Performance_Task\"><\/a>Add Numbers within 1,000 Performance Task<\/h3>\n<p>A store has four different robot kits.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-20967\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Answers-2nd-Grade-Chapter-9-Add-Numbers-within-1000-1.png\" alt=\"Big Ideas Math Answers 2nd Grade Chapter 9 Add Numbers within 1,000 1\" width=\"633\" height=\"81\" srcset=\"https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Answers-2nd-Grade-Chapter-9-Add-Numbers-within-1000-1.png 633w, https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Answers-2nd-Grade-Chapter-9-Add-Numbers-within-1000-1-300x38.png 300w\" sizes=\"(max-width: 633px) 100vw, 633px\" \/><br \/>\nQuestion 1.<br \/>\nHow many parts are there in the green, purple, and orange kits?<br \/>\n______ parts<br \/>\nAnswer:<br \/>\nGIVEN:<br \/>\nFOUR different robot kits.<br \/>\nNumber of robot parts in green kit = 280<br \/>\nNumber of robot parts in purple kit = 157<br \/>\nNumber of robot parts in orange kit = 360<br \/>\nADDITION:<br \/>\nTotal number of robot parts in green, purple, and orange kits = 280 + 157 + 360<br \/>\n= 437 + 360 = 797.<br \/>\nHence, Total number of robot parts in green, purple, and orange kits = 797.<\/p>\n<p>Question 2.<br \/>\nThe orange kit has 183 fewer parts than the yellow kit. How many parts are in the yellow kit?<br \/>\n______ parts<br \/>\nAnswer:<br \/>\nLet robot parts in yellow kit be X<br \/>\nNumber of robot parts in orange kit = 183<br \/>\nDifference in Number of robot parts in orange and yellow kit = 360<br \/>\n= X &#8211; 183 = 360<br \/>\n=&gt; X = 360 + 183<br \/>\n=&gt; X = 543.<br \/>\nHence, robot parts in yellow kit = 543.<br \/>\nQuestion 3.<br \/>\nYour friend wants to buy two kits so that he has700 parts. Which two kits should he buy?<br \/>\n_____ and ______<br \/>\nAnswer:<br \/>\nGIVEN:<br \/>\nYour friend wants to buy two kits so that he has700 parts.<br \/>\nNumber of robot parts in green kit = 280<br \/>\nNumber of robot parts in purple kit = 157<br \/>\nNumber of robot parts in orange kit = 360<br \/>\nNumber of robot parts in yellow kit = 543<br \/>\nCheck the sum of four kits robot parts to each other.<br \/>\n280 + 157 = 437\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0157 + 280 = 437<br \/>\n280 + 360 = 640\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0157 + 360 = 517<br \/>\n280 + 543 = 823\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0157 + 543 = 700<\/p>\n<p>360+ 280 = 640<br \/>\n360 + 157 = 517<br \/>\n360 + 543 = 903<br \/>\nTherefore, 157 + 543 = 700.<br \/>\nADDITION:<br \/>\nTwo kits that have to be purchased = Number of robot parts in purple kit +\u00a0 Number of robot parts in yellow kit =157 + 543 = 700.<br \/>\nHence, Two kits that have to be purchased =700.<\/p>\n<p>Question 4.<br \/>\na. You have some robot parts at home. You buy two purple kits and one orange kit. Now you have 774 parts. How many parts did you have to start?<br \/>\n_______ parts<br \/>\nAnswer:<br \/>\nGIVEN:<br \/>\nNumber of robot parts in purple kit = 157<br \/>\nTwo purple kit\u00a0 robot parts total = 2 x 157 = 314<br \/>\nNumber of robot parts in orange kit = 360<br \/>\nTotal parts in Two purple kit and orange kit = 314 + 360 = 674<br \/>\nTotal number of robot parts had= 774<br \/>\nDIFFERENCE:<br \/>\nNumber of robot parts required to start =\u00a0 Total number of robot parts had &#8211; Total robot parts in Two purple kit and orange kit<br \/>\n= 774 &#8211; 674<br \/>\n= 100<br \/>\nHence, Number of robot parts required to start are 100 more.<\/p>\n<p>b. Your cousin has 450 robot parts at home. She buys a kit and now has 36 more parts than you. Which kit did she buy?<br \/>\n______ kit<br \/>\nAnswer:<br \/>\nGIVEN:<br \/>\nNumber of robot parts my cousin has = 450<br \/>\nNumber of robot parts me having = 674<br \/>\nNumber of robot parts she has more than me = 36<br \/>\n=&gt; 674 + 36 = 710<br \/>\nChecking the sum of kits with my friends kit<br \/>\n=&gt; 450 + 280 =730<br \/>\n450 + 157 = 607<br \/>\n450 + 360 = 810<br \/>\n450 + 543 = 993<br \/>\nCONDITION GIVEN:<br \/>\nShe buys a kit and now has 36 more parts than you.<br \/>\n=&gt; 450 + 280 = 730.<br \/>\nHence, Kit my friend purchased is green kit.<\/p>\n<h3><a id=\"Add_Numbers_within_1,000_Activity\"><\/a>Add Numbers within 1,000 Activity<\/h3>\n<p><strong>Three in a Row: Three-Digit Addition<\/strong><br \/>\n<strong>To Play:<\/strong> Players take turns. On your turn, spin both spinners. Add the two numbers and cover the sum. Continue playing until someone gets three in a row.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-20970\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Answers-2nd-Grade-Chapter-9-Add-Numbers-within-1000-2.png\" alt=\"Big Ideas Math Answers 2nd Grade Chapter 9 Add Numbers within 1,000 2\" width=\"625\" height=\"693\" srcset=\"https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Answers-2nd-Grade-Chapter-9-Add-Numbers-within-1000-2.png 625w, https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Answers-2nd-Grade-Chapter-9-Add-Numbers-within-1000-2-271x300.png 271w\" sizes=\"(max-width: 625px) 100vw, 625px\" \/><\/p>\n<h3>Add Numbers within 1,000 Chapter Practice<\/h3>\n<p><strong>9.1 Add 10and 100<\/strong><\/p>\n<p>Question 1.<br \/>\n230 + 10 = _____<br \/>\nAnswer:<br \/>\nGIVEN:<br \/>\n230 + 10 = ???<br \/>\nADDITION:<br \/>\n230 + 10 = 240.<br \/>\nHence, Sum of 230 + 10 = 240.<\/p>\n<p>Question 2.<br \/>\n419 + 10 = _____<br \/>\nAnswer:<br \/>\nGIVEN:<br \/>\n419 + 10 = ???<br \/>\nADDITION:<br \/>\n419 + 10 = 429.<br \/>\nHence, Sum of 419 + 10 = 429.<\/p>\n<p>Question 3.<br \/>\n623 + 100 = _____<br \/>\nAnswer:<br \/>\nGIVEN:<br \/>\n623 + 100 = ???<br \/>\nADDITION:<br \/>\n623 + 100 = 723.<br \/>\nHence, Sum of 623 + 100 = 723.<\/p>\n<p>Question 4.<br \/>\n899 + 10 = _____<br \/>\nAnswer:<br \/>\nGIVEN:<br \/>\n899 + 10 = ???<br \/>\nADDITION:<br \/>\n899 + 10 = 999.<br \/>\nHence, Sum of 899 + 10 = 999.<\/p>\n<p>Question 5.<br \/>\n384 + 100 = _____<br \/>\nAnswer:<br \/>\nGIVEN:<br \/>\n384 + 100 = ???<br \/>\nADDITION:<br \/>\n384 + 100 = 484.<br \/>\nHence, sum of 384 + 100 = 484.<\/p>\n<p>Question 6.<br \/>\n167 + 100 = _____<br \/>\nAnswer:<br \/>\nGIVEN:<br \/>\n167 + 100 = ???<br \/>\nADDITION:<br \/>\n167 + 100 = 267.<br \/>\nHence, sum of 167 + 100 = 267.<\/p>\n<p><strong>9.2 Use a Number Line to Add Hundreds and Tens<\/strong><\/p>\n<p>Question 7.<br \/>\n592 + 340 = _____<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-20971\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Answers-2nd-Grade-Chapter-9-Add-Numbers-within-1000-chp-7.png\" alt=\"Big Ideas Math Answers 2nd Grade Chapter 9 Add Numbers within 1,000 chp 7\" width=\"518\" height=\"36\" srcset=\"https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Answers-2nd-Grade-Chapter-9-Add-Numbers-within-1000-chp-7.png 518w, https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Answers-2nd-Grade-Chapter-9-Add-Numbers-within-1000-chp-7-300x21.png 300w\" sizes=\"(max-width: 518px) 100vw, 518px\" \/><br \/>\nAnswer:<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-25307\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Book-2nd-Grade-Answer-Key-Chapter-9-add-Numbers-within-1000-9.2-Use-Number-Line-to-Add-Hundreds-and-Tens-7.png\" alt=\"\" width=\"790\" height=\"139\" srcset=\"https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Book-2nd-Grade-Answer-Key-Chapter-9-add-Numbers-within-1000-9.2-Use-Number-Line-to-Add-Hundreds-and-Tens-7.png 790w, https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Book-2nd-Grade-Answer-Key-Chapter-9-add-Numbers-within-1000-9.2-Use-Number-Line-to-Add-Hundreds-and-Tens-7-300x53.png 300w, https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Book-2nd-Grade-Answer-Key-Chapter-9-add-Numbers-within-1000-9.2-Use-Number-Line-to-Add-Hundreds-and-Tens-7-768x135.png 768w\" sizes=\"(max-width: 790px) 100vw, 790px\" \/><br \/>\nADDITION:<br \/>\n592 + 100 + 100 + 100 + 40<br \/>\n= 692 + 100 + 100 + 40<br \/>\n= 792 + 100 + 40<br \/>\n= 892 + 40<br \/>\n= 932.<br \/>\nHence, Sum of 592 + 100 + 100 + 100 + 40 = 932.<\/p>\n<p>Question 8.<br \/>\n<strong>Modeling Real Life<\/strong><br \/>\nYou have 170 football stickers and some baseball stickers. You have 360 stickers in all. How many baseball stickers do you have?<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-20972\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Answers-2nd-Grade-Chapter-9-Add-Numbers-within-1000-chp-8.png\" alt=\"Big Ideas Math Answers 2nd Grade Chapter 9 Add Numbers within 1,000 chp 8\" width=\"518\" height=\"36\" srcset=\"https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Answers-2nd-Grade-Chapter-9-Add-Numbers-within-1000-chp-8.png 518w, https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Answers-2nd-Grade-Chapter-9-Add-Numbers-within-1000-chp-8-300x21.png 300w\" sizes=\"(max-width: 518px) 100vw, 518px\" \/><br \/>\n_______ baseball stickers<br \/>\nAnswer:<br \/>\nGIVEN:<br \/>\nTotal number of stickers in all = 360<br \/>\nNumber of football stickers = 170<br \/>\nNumber of baseball stickers = ???<br \/>\nSUBTRACTION:<br \/>\nNumber of baseball stickers = Total number of stickers in all &#8211; Number of football stickers<br \/>\n= 360 &#8211; 170<br \/>\n= 130.<br \/>\nHence, Number of baseball stickers = 130.<\/p>\n<p><strong>9.3 Use a Number Line to Add Three-Digit Numbers<\/strong><\/p>\n<p>Question 9.<br \/>\n365 + 342 = _____<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-20973\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Answers-2nd-Grade-Chapter-9-Add-Numbers-within-1000-chp-9.png\" alt=\"Big Ideas Math Answers 2nd Grade Chapter 9 Add Numbers within 1,000 chp 9\" width=\"517\" height=\"42\" srcset=\"https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Answers-2nd-Grade-Chapter-9-Add-Numbers-within-1000-chp-9.png 517w, https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Answers-2nd-Grade-Chapter-9-Add-Numbers-within-1000-chp-9-300x24.png 300w\" sizes=\"(max-width: 517px) 100vw, 517px\" \/><br \/>\nAnswer:<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-25305\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Book-2nd-Grade-Answer-Key-Chapter-9-add-Numbers-within-1000-9.3-Use-a-Number-Line-to-Add-Three-Digit-Numbers-9.png\" alt=\"\" width=\"810\" height=\"167\" srcset=\"https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Book-2nd-Grade-Answer-Key-Chapter-9-add-Numbers-within-1000-9.3-Use-a-Number-Line-to-Add-Three-Digit-Numbers-9.png 810w, https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Book-2nd-Grade-Answer-Key-Chapter-9-add-Numbers-within-1000-9.3-Use-a-Number-Line-to-Add-Three-Digit-Numbers-9-300x62.png 300w, https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Book-2nd-Grade-Answer-Key-Chapter-9-add-Numbers-within-1000-9.3-Use-a-Number-Line-to-Add-Three-Digit-Numbers-9-768x158.png 768w\" sizes=\"(max-width: 810px) 100vw, 810px\" \/><br \/>\nADDITION:<br \/>\n365 +100 + 100 + 100 + 42<br \/>\n= 465 + 100 + 100 + 42<br \/>\n= 565 + 100 + 42<br \/>\n= 665 + 42<br \/>\n= 707.<br \/>\nHence, 365 +100 + 100 + 100 + 42 = 707.<\/p>\n<p>Question 10.<br \/>\n604 + 217 = ____<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-20974\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Answers-2nd-Grade-Chapter-9-Add-Numbers-within-1000-chp-10.png\" alt=\"Big Ideas Math Answers 2nd Grade Chapter 9 Add Numbers within 1,000 chp 10\" width=\"529\" height=\"39\" srcset=\"https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Answers-2nd-Grade-Chapter-9-Add-Numbers-within-1000-chp-10.png 529w, https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Answers-2nd-Grade-Chapter-9-Add-Numbers-within-1000-chp-10-300x22.png 300w\" sizes=\"(max-width: 529px) 100vw, 529px\" \/><br \/>\nAnswer:<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-25306\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Book-2nd-Grade-Answer-Key-Chapter-9-add-Numbers-within-1000-9.3-Use-a-Number-Line-to-Add-Three-Digit-Numbers-10.png\" alt=\"\" width=\"781\" height=\"149\" srcset=\"https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Book-2nd-Grade-Answer-Key-Chapter-9-add-Numbers-within-1000-9.3-Use-a-Number-Line-to-Add-Three-Digit-Numbers-10.png 781w, https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Book-2nd-Grade-Answer-Key-Chapter-9-add-Numbers-within-1000-9.3-Use-a-Number-Line-to-Add-Three-Digit-Numbers-10-300x57.png 300w, https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Book-2nd-Grade-Answer-Key-Chapter-9-add-Numbers-within-1000-9.3-Use-a-Number-Line-to-Add-Three-Digit-Numbers-10-768x147.png 768w\" sizes=\"(max-width: 781px) 100vw, 781px\" \/><br \/>\nADDITION:<br \/>\n604 + 100 + 100 + 17<br \/>\n= 704 + 100 + 17<br \/>\n= 804 + 17<br \/>\n= 821.<br \/>\nHence, Sum of 604 + 100 + 100 + 17 = 821.<\/p>\n<p><strong>9.4 Use Compensation to Add Three-Digit Numbers<\/strong><\/p>\n<p><strong>Use Compensation to Add<\/strong><br \/>\nQuestion 11.<br \/>\n205 + 631 = ?<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-20975\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Answers-2nd-Grade-Chapter-9-Add-Numbers-within-1000-chp-11.png\" alt=\"Big Ideas Math Answers 2nd Grade Chapter 9 Add Numbers within 1,000 chp 11\" width=\"203\" height=\"55\" \/><br \/>\n_____ + ____ = _____<br \/>\nAnswer:<br \/>\n205 + 631 = ???<br \/>\nAdd 5 to 205.<br \/>\nSubtract 5 from 631.<br \/>\n205\u00a0 \u00a0+\u00a0 \u00a0 631<br \/>\n+\u00a0 \u00a05\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 &#8211;\u00a0 5<br \/>\n210\u00a0 \u00a0 \u00a0+\u00a0 \u00a0626 = 836.<br \/>\nHence, Sum of 205 + 631 = 836.<\/p>\n<p>Question 12.<br \/>\n452 + 311 = ?<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-20976\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Answers-2nd-Grade-Chapter-9-Add-Numbers-within-1000-chp-12.png\" alt=\"Big Ideas Math Answers 2nd Grade Chapter 9 Add Numbers within 1,000 chp 12\" width=\"202\" height=\"55\" \/><br \/>\n_____ + ____ = _____<br \/>\nAnswer:<br \/>\nGIVEN:<br \/>\n452 + 311 = ???<br \/>\nAdd 8 to 452.<br \/>\nSubtract 8 from 311.<br \/>\n452\u00a0 \u00a0 \u00a0 +\u00a0 \u00a0 311<br \/>\n+ 8\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0&#8211;\u00a0 \u00a08<br \/>\n460\u00a0 \u00a0 \u00a0 +\u00a0 \u00a0 302 = 762.<br \/>\nHence, Sum of 452 + 311 = 762.<\/p>\n<p>Question 13.<br \/>\n<strong>YOU BE THE TEACHER<\/strong><br \/>\nNewton uses compensation to find 198 + 267. Is he correct? Explain.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-20977\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Answers-2nd-Grade-Chapter-9-Add-Numbers-within-1000-chp-13.png\" alt=\"Big Ideas Math Answers 2nd Grade Chapter 9 Add Numbers within 1,000 chp 13\" width=\"428\" height=\"189\" srcset=\"https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Answers-2nd-Grade-Chapter-9-Add-Numbers-within-1000-chp-13.png 428w, https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Answers-2nd-Grade-Chapter-9-Add-Numbers-within-1000-chp-13-300x132.png 300w\" sizes=\"(max-width: 428px) 100vw, 428px\" \/><br \/>\nAnswer:<br \/>\nGIVEN:<br \/>\n198 + 267 = ???<br \/>\nAdd 2 to 198.<br \/>\nSubtract 2 from 267.<br \/>\n198\u00a0 \u00a0 +\u00a0 \u00a0 267<br \/>\n+ 2\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0&#8211;\u00a0 2<br \/>\n200\u00a0 \u00a0 +\u00a0 \u00a0265 = 465.<br \/>\nHence, Newton compensation is not correct because the sum of 198 + 267 = 465 not 467.<\/p>\n<p><strong>9.5 Use Partial Sums to Add Three-Digit Numbers<\/strong><\/p>\n<p>Question 14.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-20978\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Answers-2nd-Grade-Chapter-9-Add-Numbers-within-1000-chp-14.png\" alt=\"Big Ideas Math Answers 2nd Grade Chapter 9 Add Numbers within 1,000 chp 14\" width=\"107\" height=\"87\" \/><br \/>\nAnswer:<br \/>\nGIVEN: 264 + 483 =???<br \/>\nADDITION:<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-25308\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Book-2nd-Grade-Answer-Key-Chapter-9-add-Numbers-within-1000-9.5Use-Partial-Sums-to-Add-Three-Digit-Numbers-14.png\" alt=\"\" width=\"179\" height=\"251\" \/><br \/>\nHence, Sum of 264 + 483 = 747.<\/p>\n<p>Question 15.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-20979\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Answers-2nd-Grade-Chapter-9-Add-Numbers-within-1000-chp-15.png\" alt=\"Big Ideas Math Answers 2nd Grade Chapter 9 Add Numbers within 1,000 chp 15\" width=\"113\" height=\"92\" \/><br \/>\nAnswer:<br \/>\nGIVEN:<br \/>\n807 + 123 = ??<br \/>\nADDITION:<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-25309\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Book-2nd-Grade-Answer-Key-Chapter-9-add-Numbers-within-1000-9.5Use-Partial-Sums-to-Add-Three-Digit-Numbers-15.png\" alt=\"\" width=\"189\" height=\"253\" \/><br \/>\nHence, Sum of 807 + 123 = 933.<\/p>\n<p>Question 16.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-20980\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Answers-2nd-Grade-Chapter-9-Add-Numbers-within-1000-chp-16.png\" alt=\"Big Ideas Math Answers 2nd Grade Chapter 9 Add Numbers within 1,000 chp 16\" width=\"105\" height=\"82\" \/><br \/>\nAnswer:<br \/>\nGIVEN:<br \/>\n325 + 324 = ???<br \/>\nADDITION:<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-25310\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Book-2nd-Grade-Answer-Key-Chapter-9-add-Numbers-within-1000-9.5Use-Partial-Sums-to-Add-Three-Digit-Numbers-16.png\" alt=\"\" width=\"200\" height=\"271\" \/><br \/>\nHence, Sum of 325 + 324 = 649.<\/p>\n<p>Question 17.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-20981\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Answers-2nd-Grade-Chapter-9-Add-Numbers-within-1000-chp-17.png\" alt=\"Big Ideas Math Answers 2nd Grade Chapter 9 Add Numbers within 1,000 chp 17\" width=\"103\" height=\"81\" \/><br \/>\nAnswer:<br \/>\nGIVEN:<br \/>\n640 + 293 = ???<br \/>\nADDITION:<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-25311\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Book-2nd-Grade-Answer-Key-Chapter-9-add-Numbers-within-1000-9.5Use-Partial-Sums-to-Add-Three-Digit-Numbers-17.png\" alt=\"\" width=\"221\" height=\"291\" \/><br \/>\nHence, Sum of 640 + 293 = 933.<\/p>\n<p><strong>9.6 Use Models to Add Three-Digit Numbers<\/strong><\/p>\n<p>Question 18.<br \/>\n395 + 410 = ?<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-20982\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Answers-2nd-Grade-Chapter-9-Add-Numbers-within-1000-chp-18.png\" alt=\"Big Ideas Math Answers 2nd Grade Chapter 9 Add Numbers within 1,000 chp 18\" width=\"421\" height=\"197\" srcset=\"https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Answers-2nd-Grade-Chapter-9-Add-Numbers-within-1000-chp-18.png 421w, https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Answers-2nd-Grade-Chapter-9-Add-Numbers-within-1000-chp-18-300x140.png 300w\" sizes=\"(max-width: 421px) 100vw, 421px\" \/><br \/>\nAnswer:<br \/>\nGIVEN:<br \/>\n395 + 410 = ???<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-25312\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Book-2nd-Grade-Answer-Key-Chapter-9-add-Numbers-within-1000-9.6-Use-Models-to-Add-Three-Digit-Numbers-18..png\" alt=\"\" width=\"611\" height=\"357\" srcset=\"https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Book-2nd-Grade-Answer-Key-Chapter-9-add-Numbers-within-1000-9.6-Use-Models-to-Add-Three-Digit-Numbers-18..png 611w, https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Book-2nd-Grade-Answer-Key-Chapter-9-add-Numbers-within-1000-9.6-Use-Models-to-Add-Three-Digit-Numbers-18.-300x175.png 300w\" sizes=\"(max-width: 611px) 100vw, 611px\" \/><br \/>\nHence, Sum of 395 + 410 = 805.<\/p>\n<p>9.7 Add Three-Digit Numbers<\/p>\n<p>Question 19.<br \/>\n<strong>Number Sense<\/strong><br \/>\nFind the missing digits.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-20983\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Answers-2nd-Grade-Chapter-9-Add-Numbers-within-1000-chp-19.png\" alt=\"Big Ideas Math Answers 2nd Grade Chapter 9 Add Numbers within 1,000 chp 19\" width=\"611\" height=\"118\" srcset=\"https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Answers-2nd-Grade-Chapter-9-Add-Numbers-within-1000-chp-19.png 611w, https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Answers-2nd-Grade-Chapter-9-Add-Numbers-within-1000-chp-19-300x58.png 300w\" sizes=\"(max-width: 611px) 100vw, 611px\" \/><br \/>\nAnswer:<br \/>\nGIVEN:<br \/>\n<img src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Answers-2nd-Grade-Chapter-9-Add-Numbers-within-1000-chp-19.png\" alt=\"Big Ideas Math Answers 2nd Grade Chapter 9 Add Numbers within 1,000 chp 19\" \/><br \/>\nSUBTRACTION:<br \/>\n918 &#8211; 561 = 357.<br \/>\n379 &#8211; 264 = 115.<br \/>\n792 &#8211; 646 = 146.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-25251\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Book-2nd-Grade-Answer-Key-Chapter-9-add-Numbers-within-1000-Lesson-9.6-Question-19-Number-Sense.png\" alt=\"\" width=\"827\" height=\"182\" srcset=\"https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Book-2nd-Grade-Answer-Key-Chapter-9-add-Numbers-within-1000-Lesson-9.6-Question-19-Number-Sense.png 827w, https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Book-2nd-Grade-Answer-Key-Chapter-9-add-Numbers-within-1000-Lesson-9.6-Question-19-Number-Sense-300x66.png 300w, https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Book-2nd-Grade-Answer-Key-Chapter-9-add-Numbers-within-1000-Lesson-9.6-Question-19-Number-Sense-768x169.png 768w\" sizes=\"(max-width: 827px) 100vw, 827px\" \/><br \/>\nADDITION:<br \/>\n561 + 357 = 918.<br \/>\n115 + 264 = 379.<br \/>\n646 + 146 = 792.<br \/>\nHence, the missing numbers are\u00a0 357, 115 and 146.<\/p>\n<p><strong>9.8 Add Up to 4 Two-Digit Numbers<\/strong><\/p>\n<p>Question 20.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-20984\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Answers-2nd-Grade-Chapter-9-Add-Numbers-within-1000-chp-20.png\" alt=\"Big Ideas Math Answers 2nd Grade Chapter 9 Add Numbers within 1,000 chp 20\" width=\"86\" height=\"110\" \/><br \/>\nAnswer:<br \/>\nGIVEN:<br \/>\n54 + 32 + 20 = ???<br \/>\nADDITION:<br \/>\n54 + 32 + 20<br \/>\n= 86 + 20<br \/>\n= 106.<br \/>\nHence, 54 +32 +20 = 106.<\/p>\n<p>Question 21.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-20985\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Answers-2nd-Grade-Chapter-9-Add-Numbers-within-1000-chp-21.png\" alt=\"Big Ideas Math Answers 2nd Grade Chapter 9 Add Numbers within 1,000 chp 21\" width=\"102\" height=\"118\" \/><br \/>\nAnswer:<br \/>\nGIVEN:<br \/>\n43 + 58 +17 = ???<br \/>\nADDITION:<br \/>\n43 + 58 +17<br \/>\n= 101 + 17<br \/>\n=118.<br \/>\nHence, 43 + 58 +17 = 118.<\/p>\n<p>Question 22.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-20986\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Answers-2nd-Grade-Chapter-9-Add-Numbers-within-1000-chp-22.png\" alt=\"Big Ideas Math Answers 2nd Grade Chapter 9 Add Numbers within 1,000 chp 22\" width=\"95\" height=\"118\" \/><br \/>\nAnswer:<br \/>\nGIVEN:<br \/>\n16 + 81 + 74 = ???<br \/>\nADDITION:<br \/>\n16 + 81 + 74<br \/>\n= 97 + 74<br \/>\n= 151.<br \/>\nHence, 16 +61 + 74 = 151.<\/p>\n<p>Question 23.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-20987\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Answers-2nd-Grade-Chapter-9-Add-Numbers-within-1000-chp-23.png\" alt=\"Big Ideas Math Answers 2nd Grade Chapter 9 Add Numbers within 1,000 chp 23\" width=\"103\" height=\"147\" \/><br \/>\nAnswer:<br \/>\nGIVEN:<br \/>\n92 + 52+ 38 +41 = ???<br \/>\nADDITION:<br \/>\n92 + 52+ 38 +41<br \/>\n= 144 + 38 +41<br \/>\n= 182 + 41<br \/>\n= 223.<br \/>\nHence, 92 + 52+ 38 +41 = 223.<\/p>\n<p>Question 24.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-20988\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Answers-2nd-Grade-Chapter-9-Add-Numbers-within-1000-chp-24.png\" alt=\"Big Ideas Math Answers 2nd Grade Chapter 9 Add Numbers within 1,000 chp 24\" width=\"107\" height=\"148\" \/><br \/>\nAnswer:<br \/>\nGIVEN:<br \/>\n90+ 5 +13 + 48 = ???<br \/>\nADDITION:<br \/>\n66 + 44 +30 +9<br \/>\n= 95 + 13 + 48<br \/>\n= 108 + 48<br \/>\n= 156.<br \/>\nHence, 90+ 5 +13 + 48 = 156.<\/p>\n<p>Question 25.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-20989\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2021\/01\/Big-Ideas-Math-Answers-2nd-Grade-Chapter-9-Add-Numbers-within-1000-chp-25.png\" alt=\"Big Ideas Math Answers 2nd Grade Chapter 9 Add Numbers within 1,000 chp 25\" width=\"101\" height=\"143\" \/><br \/>\nAnswer:<br \/>\nGIVEN:<br \/>\n66 + 44 +30 +9 = ???<br \/>\nADDITION:<br \/>\n66 + 44 +30 +9<br \/>\n= 110+30 +9<br \/>\n= 140 + 9<br \/>\n= 149.<br \/>\nHence, 66 + 44 +30 +9 = 149.<\/p>\n<p><strong>9.9 Explain Addition Strategies<\/strong><\/p>\n<p><strong>Choose any strategy to solve. Explain how you solved.<\/strong><br \/>\nQuestion 26.<br \/>\n538 + 176 = ______<br \/>\n________________________<br \/>\n_________________________<br \/>\nAnswer:<br \/>\nEQUATION METHOD:<br \/>\n538 + 100 + 10 + 10 +10 + 10\u00a0 + 10 + 10 + 10 + 6<br \/>\n=638 + 10 + 10 +10 + 10\u00a0 + 10 + 10 + 10 + 6<br \/>\n= 648 + 10 +10 + 10\u00a0 + 10 + 10 + 10 + 6<br \/>\n= 658 + 10 + 10\u00a0 + 10 + 10 + 10 + 6<br \/>\n= 668 + 10\u00a0 + 10 + 10 + 10 + 6<br \/>\n= 678 + 10 + 10 + 10 + 6<br \/>\n= 688 + 10 + 10 + 6<br \/>\n= 698 + 10 + 6<br \/>\n= 708 +6<br \/>\n= 714.<\/p>\n<p><em>Conclusion:<\/em><\/p>\n<p>We have given a detailed explanation for each and every topic discussed in Big Ideas Math Book Grade 2 Chapter 9 Add Numbers within 1,000 Solutions. We have also provided the exercise problems along with the answers to help in practising the Add Numbers within 1,000 chapter. Stay tuned to our website to get the answers for all chapters of grade 2.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Avail free Big Ideas Math Grade 2 Chapter 9 Add Numbers within 1,000 Answer Key PDF on this page. This handy Big Ideas Math Answers Grade 2 9th Chapter Add Numbers within 1,000 contains solutions for each and every question in the textbook. Students can download BIM Book Grade 2 Chapter 9 Add Numbers within &#8230; <a title=\"Big Ideas Math Answers Grade 2 Chapter 9 Add Numbers within 1,000\" class=\"read-more\" href=\"https:\/\/bigideasmathanswers.com\/big-ideas-math-answers-grade-2-chapter-9\/\" aria-label=\"More on Big Ideas Math Answers Grade 2 Chapter 9 Add Numbers within 1,000\">Read more<\/a><\/p>\n","protected":false},"author":9,"featured_media":89572,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"spay_email":""},"categories":[4],"tags":[],"jetpack_featured_media_url":"https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2021\/04\/Big-Ideas-Math-Answers-Grade-2-Chapter-9.png","_links":{"self":[{"href":"https:\/\/bigideasmathanswers.com\/wp-json\/wp\/v2\/posts\/20781"}],"collection":[{"href":"https:\/\/bigideasmathanswers.com\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/bigideasmathanswers.com\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/bigideasmathanswers.com\/wp-json\/wp\/v2\/users\/9"}],"replies":[{"embeddable":true,"href":"https:\/\/bigideasmathanswers.com\/wp-json\/wp\/v2\/comments?post=20781"}],"version-history":[{"count":1,"href":"https:\/\/bigideasmathanswers.com\/wp-json\/wp\/v2\/posts\/20781\/revisions"}],"predecessor-version":[{"id":90381,"href":"https:\/\/bigideasmathanswers.com\/wp-json\/wp\/v2\/posts\/20781\/revisions\/90381"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/bigideasmathanswers.com\/wp-json\/wp\/v2\/media\/89572"}],"wp:attachment":[{"href":"https:\/\/bigideasmathanswers.com\/wp-json\/wp\/v2\/media?parent=20781"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/bigideasmathanswers.com\/wp-json\/wp\/v2\/categories?post=20781"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/bigideasmathanswers.com\/wp-json\/wp\/v2\/tags?post=20781"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}