{"id":10630,"date":"2022-04-03T10:33:23","date_gmt":"2022-04-03T05:03:23","guid":{"rendered":"https:\/\/ccssmathanswers.com\/?p=10630"},"modified":"2022-04-07T11:34:31","modified_gmt":"2022-04-07T06:04:31","slug":"big-ideas-math-answers-grade-3-chapter-7","status":"publish","type":"post","link":"https:\/\/bigideasmathanswers.com\/big-ideas-math-answers-grade-3-chapter-7\/","title":{"rendered":"Big Ideas Math Answers Grade 3 Chapter 7 Round and Estimate Numbers"},"content":{"rendered":"<p>Big Ideas Math Grade 3 Chapter 7 Round and Estimate Numbers Answers PDF link is available here. Students who have been looking for the solutions of BIM Book Grade 3 Chapter 7 can download the solution key provided in pdf format and begin preparation. This answer key is useful to complete the homework within time. Students can get the answers for every question in BIM Book 3rd Grade 7th Chapter Round and Estimate Numbers in the following sections.<\/p>\n<h2>Big Ideas Math Book 3rd Grade Answer Key Chapter 7 Round and Estimate Numbers<\/h2>\n<p>BIM Book Grade 3 Chapter 7 Round and Estimate Numbers includes the topics like Place value, Round Numbers Using a Number Line, Round Numbers Using Place Value, Estimate Sums, and Estimate Differences. After preparing these lessons, you will find the performance task section where you can check skills. To become an expert in maths, you need to prepare as per <a href=\"https:\/\/bigideasmathanswers.com\/big-ideas-math-answers-grade-3\/\">Big Ideas Math Answers Grade 3<\/a> Chapter 7 Round and Estimate Numbers.<\/p>\n<p>The solutions provided here are solved by experts in mathematics. So, download Big Ideas Math Book 3rd Grade 7th Chapter Round and Estimate Numbers Answer Key PDF. You can also get the direct links for every lesson in the below sections. Just tap on those links and get the answers easily.<\/p>\n<p><strong>Lesson 1: Place value<\/strong><\/p>\n<ul>\n<li><a href=\"#Lesson_7.1_Place_value\">Lesson 7.1 Place value<\/a><\/li>\n<li><a href=\"#Place_value_property_Homework_&amp;_Practice_7.1\">Place value Property Homework &amp; Practice 7.1<\/a><\/li>\n<\/ul>\n<p><strong>Lesson 2: Round Numbers Using a Number Line<\/strong><\/p>\n<ul>\n<li><a href=\"#Lesson_7.2_Round_Numbers_Using_a_Number_Line\">Lesson 7.2 Round Numbers Using a Number Line<\/a><\/li>\n<li><a href=\"#Round_Numbers_Using_a_Number_Line_Homework_&amp;_Practice_7.2\">Round Numbers Using a Number Line Homework &amp; Practice 7.2<\/a><\/li>\n<\/ul>\n<p><strong>Lesson 3: Round Numbers Using Place Value<\/strong><\/p>\n<ul>\n<li><a href=\"#Lesson_7.3_Round_Numbers_Using_a_Place_Value\">Lesson 7.3 Round Numbers Using Place Value<\/a><\/li>\n<li><a href=\"#Round_Numbers_Using_a_Place_Value_Homework_&amp;_Practice_7.3\">Round Numbers Using a Place Value Homework &amp; Practice 7.3<\/a><\/li>\n<\/ul>\n<p><strong>Lesson 4: Estimate Sums<\/strong><\/p>\n<ul>\n<li><a href=\"#Lesson_7.4_Estimate_Sums\">Lesson 7.4 Estimate Sums<\/a><\/li>\n<li><a href=\"#Estimate_Sums_Homework_&amp;_Practice_7.4\">Estimate Sums Homework &amp; Practice 7.4<\/a><\/li>\n<\/ul>\n<p><strong>Lesson 5: Estimate Differences<\/strong><\/p>\n<ul>\n<li><a href=\"#Lesson_7.5_Estimate_differences\">Lesson 7.5 Estimate Differences<\/a><\/li>\n<li><a href=\"#Estimate_differences_Homework_&amp;_Practice_7.5\">Estimate Differences Homework &amp; Practice 7.5<\/a><\/li>\n<\/ul>\n<p><strong>Performance Task<\/strong><\/p>\n<ul>\n<li><a href=\"#Round_and_Estimate_Numbers_Performance_Task\">Round and Estimate Numbers Performance Task<\/a><\/li>\n<li><a href=\"#Round_and_Estimate_Numbers_Activity\">Round and Estimate Numbers Activity<\/a><\/li>\n<li><a href=\"#Round_and_Estimate_Numbers_Chapter_Practice\">Round and Estimate Numbers Chapter Practice<\/a><\/li>\n<\/ul>\n<h3><a id=\"Lesson_7.1_Place_value\"><\/a>Lesson 7.1 Place value<\/h3>\n<p><strong>Explore and Grow<\/strong><br \/>\nModel each number. Write each number in expanded form.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-10632\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2020\/12\/Big-Ideas-Math-Answer-Key-Grade-3-Chapter-7-Round-and-Estimate-Numbers-7.1-1.png\" alt=\"Big Ideas Math Answer Key Grade 3 Chapter 7 Round and Estimate Numbers 7.1 1\" width=\"211\" height=\"119\" \/><br \/>\n130<br \/>\n310<br \/>\n103<\/p>\n<p>Answer:<br \/>\n100+30+0=130<br \/>\n300+10+0=310<br \/>\n100+00+3=103<br \/>\n<strong>Reasoning<\/strong><br \/>\nWhich number is the greatest? How do you know?<\/p>\n<p>Answer: 310 is the greatest number because the number value of the digit in hundreds place is great compared to others numbers i.e 103 and 130.<\/p>\n<p><strong>Think and Grow: Place value<\/strong><\/p>\n<p><strong>Find the value of the underlined digit.<\/strong><br \/>\n<strong>Example<\/strong><br \/>\n2<span style=\"text-decoration: underline;\">5<\/span>3<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-10633\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2020\/12\/Big-Ideas-Math-Answer-Key-Grade-3-Chapter-7-Round-and-Estimate-Numbers-7.1-2.png\" alt=\"Big Ideas Math Answer Key Grade 3 Chapter 7 Round and Estimate Numbers 7.1 2\" width=\"471\" height=\"231\" srcset=\"https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2020\/12\/Big-Ideas-Math-Answer-Key-Grade-3-Chapter-7-Round-and-Estimate-Numbers-7.1-2.png 471w, https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2020\/12\/Big-Ideas-Math-Answer-Key-Grade-3-Chapter-7-Round-and-Estimate-Numbers-7.1-2-300x147.png 300w\" sizes=\"(max-width: 471px) 100vw, 471px\" \/><br \/>\nExpanded form: 200 + 50 + 3<br \/>\nThe digit 5 has a value of _5 tens_, or __50__.<\/p>\n<p><strong>Example<\/strong><br \/>\n<span style=\"text-decoration: underline;\">5<\/span>17<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-10634\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2020\/12\/Big-Ideas-Math-Answer-Key-Grade-3-Chapter-7-Round-and-Estimate-Numbers-7.1-3.png\" alt=\"Big Ideas Math Answer Key Grade 3 Chapter 7 Round and Estimate Numbers 7.1 3\" width=\"403\" height=\"192\" srcset=\"https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2020\/12\/Big-Ideas-Math-Answer-Key-Grade-3-Chapter-7-Round-and-Estimate-Numbers-7.1-3.png 403w, https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2020\/12\/Big-Ideas-Math-Answer-Key-Grade-3-Chapter-7-Round-and-Estimate-Numbers-7.1-3-300x143.png 300w\" sizes=\"(max-width: 403px) 100vw, 403px\" \/><br \/>\nExpanded form: _500__ + __10__ + ___7__<br \/>\nThe digit 5 has a value of __5 hundreds___, or ___500__.<\/p>\n<p><strong>Show and Grow<\/strong><br \/>\n<strong>Circle the value of the underlined digit.<\/strong><\/p>\n<p>Question.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-10635\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2020\/12\/Big-Ideas-Math-Answer-Key-Grade-3-Chapter-7-Round-and-Estimate-Numbers-7.1-4.png\" alt=\"Big Ideas Math Answer Key Grade 3 Chapter 7 Round and Estimate Numbers 7.1 4\" width=\"628\" height=\"134\" srcset=\"https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2020\/12\/Big-Ideas-Math-Answer-Key-Grade-3-Chapter-7-Round-and-Estimate-Numbers-7.1-4.png 628w, https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2020\/12\/Big-Ideas-Math-Answer-Key-Grade-3-Chapter-7-Round-and-Estimate-Numbers-7.1-4-300x64.png 300w\" sizes=\"(max-width: 628px) 100vw, 628px\" \/><\/p>\n<p>Answer:<br \/>\n<a href=\"https:\/\/ccssmathanswers.com\/?attachment_id=18071\" rel=\"attachment wp-att-18071\"><img loading=\"lazy\" class=\"alignnone wp-image-18071 size-full\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2020\/12\/Placevalue-7.1.jpg\" alt=\"\" width=\"306\" height=\"229\" srcset=\"https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2020\/12\/Placevalue-7.1.jpg 306w, https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2020\/12\/Placevalue-7.1-300x225.jpg 300w\" sizes=\"(max-width: 306px) 100vw, 306px\" \/><\/a><br \/>\n<a href=\"https:\/\/ccssmathanswers.com\/big-ideas-math-answers-grade-3-chapter-7\/placevalue-7-1-2\/\" rel=\"attachment wp-att-18073\"><img loading=\"lazy\" class=\"alignnone wp-image-18073 size-full\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2020\/12\/Placevalue-7.1-1.jpg\" alt=\"\" width=\"344\" height=\"200\" srcset=\"https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2020\/12\/Placevalue-7.1-1.jpg 344w, https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2020\/12\/Placevalue-7.1-1-300x174.jpg 300w\" sizes=\"(max-width: 344px) 100vw, 344px\" \/><\/a><br \/>\n<a href=\"https:\/\/ccssmathanswers.com\/big-ideas-math-answers-grade-3-chapter-7\/placevalue-7-1-3\/\" rel=\"attachment wp-att-18074\"><img loading=\"lazy\" class=\"alignnone wp-image-18074 size-full\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2020\/12\/Placevalue-7.1-2.jpg\" alt=\"\" width=\"313\" height=\"199\" srcset=\"https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2020\/12\/Placevalue-7.1-2.jpg 313w, https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2020\/12\/Placevalue-7.1-2-300x191.jpg 300w\" sizes=\"(max-width: 313px) 100vw, 313px\" \/><\/a><\/p>\n<p><a href=\"https:\/\/ccssmathanswers.com\/big-ideas-math-answers-grade-3-chapter-7\/numbervalue1\/\" rel=\"attachment wp-att-16524\"><img loading=\"lazy\" class=\"alignnone wp-image-16524 size-full\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2020\/12\/numbervalue1.png\" alt=\"\" width=\"455\" height=\"203\" srcset=\"https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2020\/12\/numbervalue1.png 455w, https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2020\/12\/numbervalue1-300x134.png 300w\" sizes=\"(max-width: 455px) 100vw, 455px\" \/><\/a><\/p>\n<p><strong>Circle the value of the underlined digit.<\/strong><\/p>\n<p>Question.<br \/>\n<img loading=\"lazy\" class=\"alignnone wp-image-10636\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2020\/12\/Big-Ideas-Math-Answer-Key-Grade-3-Chapter-7-Round-and-Estimate-Numbers-7.1-5.png\" alt=\"Big Ideas Math Answer Key Grade 3 Chapter 7 Round and Estimate Numbers 7.1 5\" width=\"647\" height=\"189\" srcset=\"https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2020\/12\/Big-Ideas-Math-Answer-Key-Grade-3-Chapter-7-Round-and-Estimate-Numbers-7.1-5.png 647w, https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2020\/12\/Big-Ideas-Math-Answer-Key-Grade-3-Chapter-7-Round-and-Estimate-Numbers-7.1-5-300x88.png 300w\" sizes=\"(max-width: 647px) 100vw, 647px\" \/><\/p>\n<p>Answer:<br \/>\n<a href=\"https:\/\/ccssmathanswers.com\/big-ideas-math-answers-grade-3-chapter-7\/placevalue-7-1-4\/\" rel=\"attachment wp-att-18159\"><img loading=\"lazy\" class=\"alignnone wp-image-18159 size-full\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2020\/12\/Placevalue-7.1-3.jpg\" alt=\"\" width=\"316\" height=\"193\" srcset=\"https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2020\/12\/Placevalue-7.1-3.jpg 316w, https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2020\/12\/Placevalue-7.1-3-300x183.jpg 300w\" sizes=\"(max-width: 316px) 100vw, 316px\" \/><\/a><br \/>\n<a href=\"https:\/\/ccssmathanswers.com\/big-ideas-math-answers-grade-3-chapter-7\/placevalue-7-1-5\/\" rel=\"attachment wp-att-18160\"><img loading=\"lazy\" class=\"alignnone wp-image-18160 size-full\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2020\/12\/Placevalue-7.1-4.jpg\" alt=\"\" width=\"301\" height=\"155\" \/><\/a><br \/>\n<a href=\"https:\/\/ccssmathanswers.com\/big-ideas-math-answers-grade-3-chapter-7\/placevalue-7-1-6\/\" rel=\"attachment wp-att-18161\"><img loading=\"lazy\" class=\"alignnone wp-image-18161 size-full\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2020\/12\/Placevalue-7.1-5.jpg\" alt=\"\" width=\"308\" height=\"163\" srcset=\"https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2020\/12\/Placevalue-7.1-5.jpg 308w, https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2020\/12\/Placevalue-7.1-5-300x159.jpg 300w\" sizes=\"(max-width: 308px) 100vw, 308px\" \/><\/a><br \/>\n<a href=\"https:\/\/ccssmathanswers.com\/big-ideas-math-answers-grade-3-chapter-7\/placevalue-7-1-7\/\" rel=\"attachment wp-att-18162\"><img loading=\"lazy\" class=\"alignnone wp-image-18162 size-full\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2020\/12\/Placevalue-7.1-6.jpg\" alt=\"\" width=\"310\" height=\"161\" srcset=\"https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2020\/12\/Placevalue-7.1-6.jpg 310w, https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2020\/12\/Placevalue-7.1-6-300x156.jpg 300w\" sizes=\"(max-width: 310px) 100vw, 310px\" \/><\/a><\/p>\n<p><a href=\"https:\/\/ccssmathanswers.com\/big-ideas-math-answers-grade-3-chapter-7\/placevalue2-2\/\" rel=\"attachment wp-att-16533\"><img loading=\"lazy\" class=\"alignnone wp-image-16533 size-full\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2020\/12\/placevalue2-1.png\" alt=\"\" width=\"479\" height=\"268\" srcset=\"https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2020\/12\/placevalue2-1.png 479w, https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2020\/12\/placevalue2-1-300x168.png 300w\" sizes=\"(max-width: 479px) 100vw, 479px\" \/><\/a><\/p>\n<p><strong>Write the value of the underlined digit<\/strong><\/p>\n<p>Question 8.<br \/>\n<span style=\"text-decoration: underline;\">1<\/span>52<\/p>\n<p>Answer:<br \/>\n<a href=\"https:\/\/ccssmathanswers.com\/big-ideas-math-answers-grade-3-chapter-7\/placevalue-7-1-8\/\" rel=\"attachment wp-att-18163\"><img loading=\"lazy\" class=\"alignnone wp-image-18163 size-full\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2020\/12\/Placevalue-7.1-7.jpg\" alt=\"\" width=\"302\" height=\"165\" srcset=\"https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2020\/12\/Placevalue-7.1-7.jpg 302w, https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2020\/12\/Placevalue-7.1-7-300x164.jpg 300w\" sizes=\"(max-width: 302px) 100vw, 302px\" \/><\/a><br \/>\nThe value of the place of\u00a0 one digit in the number 152.<br \/>\nThe digit 1 has a place value of\u00a0 100 because its in the hundreds place.<br \/>\nQuestion 9.<br \/>\n72<span style=\"text-decoration: underline;\">5<\/span><\/p>\n<p>Answer:<br \/>\n<a href=\"https:\/\/ccssmathanswers.com\/big-ideas-math-answers-grade-3-chapter-7\/placevalue-7-1-9\/\" rel=\"attachment wp-att-18164\"><img loading=\"lazy\" class=\"alignnone wp-image-18164 size-full\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2020\/12\/Placevalue-7.1-8.jpg\" alt=\"\" width=\"310\" height=\"183\" srcset=\"https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2020\/12\/Placevalue-7.1-8.jpg 310w, https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2020\/12\/Placevalue-7.1-8-300x177.jpg 300w\" sizes=\"(max-width: 310px) 100vw, 310px\" \/><\/a><\/p>\n<p>The value of the place of the five digit in the number 725.<br \/>\nThe digit 5 has a place value of one&#8217;s because its in the one&#8217;s place.<\/p>\n<p>Question 10.<br \/>\n2<span style=\"text-decoration: underline;\">o<\/span>7<\/p>\n<p>Answer:<br \/>\n<a href=\"https:\/\/ccssmathanswers.com\/big-ideas-math-answers-grade-3-chapter-7\/placevalue-7-1-10\/\" rel=\"attachment wp-att-18165\"><img loading=\"lazy\" class=\"alignnone wp-image-18165 size-full\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2020\/12\/Placevalue-7.1-9.jpg\" alt=\"\" width=\"319\" height=\"157\" srcset=\"https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2020\/12\/Placevalue-7.1-9.jpg 319w, https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2020\/12\/Placevalue-7.1-9-300x148.jpg 300w\" sizes=\"(max-width: 319px) 100vw, 319px\" \/><\/a><br \/>\nThe value of the place of the digit in the number 207.<br \/>\nThe digit 0 has a place value of\u00a0 tens because its in the tens place.<\/p>\n<p><strong>Identify the value of each digit.<\/strong><\/p>\n<p>Question 11.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-10637\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2020\/12\/Big-Ideas-Math-Answer-Key-Grade-3-Chapter-7-Round-and-Estimate-Numbers-7.1-6.png\" alt=\"Big Ideas Math Answer Key Grade 3 Chapter 7 Round and Estimate Numbers 7.1 6\" width=\"242\" height=\"175\" \/><\/p>\n<p>Answer:<br \/>\n<a href=\"https:\/\/ccssmathanswers.com\/big-ideas-math-answers-grade-3-chapter-7\/placevalue3-2\/\" rel=\"attachment wp-att-16532\"><img loading=\"lazy\" class=\"alignnone wp-image-16532 size-full\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2020\/12\/placevalue3-1.png\" alt=\"\" width=\"210\" height=\"143\" \/><\/a><br \/>\nThe value of 3 in 386 = 300<br \/>\nThe value of 8 in 386 = 80<br \/>\nThe value of 6 in 386 = 6<br \/>\nQuestion 12.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-10638\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2020\/12\/Big-Ideas-Math-Answer-Key-Grade-3-Chapter-7-Round-and-Estimate-Numbers-7.1-7.png\" alt=\"Big Ideas Math Answer Key Grade 3 Chapter 7 Round and Estimate Numbers 7.1 7\" width=\"220\" height=\"188\" \/><\/p>\n<p>Answer:<br \/>\n<a href=\"https:\/\/ccssmathanswers.com\/big-ideas-math-answers-grade-3-chapter-7\/placevalue4\/\" rel=\"attachment wp-att-16528\"><img loading=\"lazy\" class=\"alignnone wp-image-16528\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2020\/12\/placevalue4-300x210.png\" alt=\"\" width=\"361\" height=\"253\" srcset=\"https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2020\/12\/placevalue4-300x210.png 300w, https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2020\/12\/placevalue4.png 355w\" sizes=\"(max-width: 361px) 100vw, 361px\" \/><\/a><br \/>\nThe value of 5 in 569 = 500<br \/>\nThe value of 6 in 569 = 60<br \/>\nThe value of 9 in 569 = 9<\/p>\n<p>Question 13.<br \/>\n<strong>Reasoning<\/strong><br \/>\nUse each number card once to write the greatest three-digit number. Then use each number card once to write the least three-digit number.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-10639\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2020\/12\/Big-Ideas-Math-Answer-Key-Grade-3-Chapter-7-Round-and-Estimate-Numbers-7.1-8.png\" alt=\"Big Ideas Math Answer Key Grade 3 Chapter 7 Round and Estimate Numbers 7.1 8\" width=\"595\" height=\"81\" srcset=\"https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2020\/12\/Big-Ideas-Math-Answer-Key-Grade-3-Chapter-7-Round-and-Estimate-Numbers-7.1-8.png 595w, https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2020\/12\/Big-Ideas-Math-Answer-Key-Grade-3-Chapter-7-Round-and-Estimate-Numbers-7.1-8-300x41.png 300w\" sizes=\"(max-width: 595px) 100vw, 595px\" \/><\/p>\n<p>Answer:<br \/>\nAmong three digits given hundreds place= 8( its greater than other 2 three digits)<br \/>\nAmong 2 digits three digits given tens place= 5 (its greater than other\u00a0 2)<br \/>\nLast ones place = 2(its left out digit)<br \/>\n<a href=\"https:\/\/ccssmathanswers.com\/big-ideas-math-answers-grade-3-chapter-7\/answer13-2\/\" rel=\"attachment wp-att-16531\"><img loading=\"lazy\" class=\"alignnone wp-image-16531 size-full\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2020\/12\/ANSWER13-1.png\" alt=\"\" width=\"467\" height=\"48\" srcset=\"https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2020\/12\/ANSWER13-1.png 467w, https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2020\/12\/ANSWER13-1-300x31.png 300w\" sizes=\"(max-width: 467px) 100vw, 467px\" \/><\/a><\/p>\n<p><strong>Think and Grow: Modeling Real Life<\/strong><br \/>\nNewton spends two hundred two dollars atthe grocery store.Descartes spends $220. Who spends more money?<br \/>\nMake quick sketches:<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-10640\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2020\/12\/Big-Ideas-Math-Answer-Key-Grade-3-Chapter-7-Round-and-Estimate-Numbers-7.1-9.png\" alt=\"Big Ideas Math Answer Key Grade 3 Chapter 7 Round and Estimate Numbers 7.1 9\" width=\"290\" height=\"164\" \/><br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-10641\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2020\/12\/Big-Ideas-Math-Answer-Key-Grade-3-Chapter-7-Round-and-Estimate-Numbers-7.1-10.png\" alt=\"Big Ideas Math Answer Key Grade 3 Chapter 7 Round and Estimate Numbers 7.1 10\" width=\"231\" height=\"60\" \/><br \/>\n_____ spends more money.<\/p>\n<p>Answer:<br \/>\nNewton amount spent value= 2 hundred and 2 dollar<br \/>\n= $200+ $2=$202<br \/>\nDescartes amount spent value= $220<br \/>\n$202 \u00a0\u00a0&lt; \u00a0\u00a0\u00a0$220<br \/>\nHence, Descartes spends more money.<\/p>\n<p><strong>Show and Grow<\/strong><\/p>\n<p>Question 4.<br \/>\nNewton spends one hundred forty-two dollars at the pet store. Descartes spends $124. Who spends more money?<\/p>\n<p>Answer:<br \/>\nNewton amount spent value= 1 hundred and forty two dollar<br \/>\n= $100+ $40+$2=$142<br \/>\nDescartes amount spent value= $124<br \/>\n$142 \u00a0\u00a0&gt; \u00a0\u00a0\u00a0$124<br \/>\nHence, Newton spends more money.<\/p>\n<p>Question 15.<br \/>\n<strong>DIG DEEPER!<\/strong><br \/>\nOrder the weights of the zoo animals from least to greatest. Which animal weighs the least? Which animal weighs the most?<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-10642\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2020\/12\/Big-Ideas-Math-Answer-Key-Grade-3-Chapter-7-Round-and-Estimate-Numbers-7.1-11.png\" alt=\"Big Ideas Math Answer Key Grade 3 Chapter 7 Round and Estimate Numbers 7.1 11\" width=\"265\" height=\"210\" \/><\/p>\n<p>Answer:<br \/>\n<a href=\"https:\/\/ccssmathanswers.com\/big-ideas-math-answers-grade-3-chapter-7\/15answer\/\" rel=\"attachment wp-att-16534\"><img loading=\"lazy\" class=\"alignnone size-medium wp-image-16534\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2020\/12\/15answer-300x178.png\" alt=\"\" width=\"300\" height=\"178\" srcset=\"https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2020\/12\/15answer-300x178.png 300w, https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2020\/12\/15answer.png 307w\" sizes=\"(max-width: 300px) 100vw, 300px\" \/><\/a><br \/>\nLion weighs the least of a weighting of 404 pounds.<br \/>\nZebra weighs the most of weighting of 474 pounds.<\/p>\n<h3><a id=\"Place_value_property_Homework_&amp;_Practice_7.1\"><\/a>Place value Property Homework &amp; Practice 7.1<\/h3>\n<p><strong>Circle the value of the underlined digit.<\/strong><\/p>\n<p>Question.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-10643\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2020\/12\/Big-Ideas-Math-Answer-Key-Grade-3-Chapter-7-Round-and-Estimate-Numbers-7.1-12.png\" alt=\"Big Ideas Math Answer Key Grade 3 Chapter 7 Round and Estimate Numbers 7.1 12\" width=\"669\" height=\"184\" srcset=\"https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2020\/12\/Big-Ideas-Math-Answer-Key-Grade-3-Chapter-7-Round-and-Estimate-Numbers-7.1-12.png 669w, https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2020\/12\/Big-Ideas-Math-Answer-Key-Grade-3-Chapter-7-Round-and-Estimate-Numbers-7.1-12-300x83.png 300w\" sizes=\"(max-width: 669px) 100vw, 669px\" \/><\/p>\n<p>Answer:<br \/>\n<a href=\"https:\/\/ccssmathanswers.com\/?attachment_id=18172\" rel=\"attachment wp-att-18172\"><img loading=\"lazy\" class=\"alignnone wp-image-18172 size-full\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2020\/12\/Placevalue-7.1-10.jpg\" alt=\"\" width=\"315\" height=\"187\" srcset=\"https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2020\/12\/Placevalue-7.1-10.jpg 315w, https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2020\/12\/Placevalue-7.1-10-300x178.jpg 300w\" sizes=\"(max-width: 315px) 100vw, 315px\" \/><\/a><br \/>\n<a href=\"https:\/\/ccssmathanswers.com\/big-ideas-math-answers-grade-3-chapter-7\/placevalue-7-1-12\/\" rel=\"attachment wp-att-18173\"><img loading=\"lazy\" class=\"alignnone wp-image-18173 size-full\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2020\/12\/Placevalue-7.1-11.jpg\" alt=\"\" width=\"304\" height=\"168\" srcset=\"https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2020\/12\/Placevalue-7.1-11.jpg 304w, https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2020\/12\/Placevalue-7.1-11-300x166.jpg 300w\" sizes=\"(max-width: 304px) 100vw, 304px\" \/><\/a><br \/>\n<a href=\"https:\/\/ccssmathanswers.com\/big-ideas-math-answers-grade-3-chapter-7\/placevalue-7-1-13\/\" rel=\"attachment wp-att-18174\"><img loading=\"lazy\" class=\"alignnone wp-image-18174 size-full\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2020\/12\/Placevalue-7.1-12.jpg\" alt=\"\" width=\"325\" height=\"179\" srcset=\"https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2020\/12\/Placevalue-7.1-12.jpg 325w, https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2020\/12\/Placevalue-7.1-12-300x165.jpg 300w\" sizes=\"(max-width: 325px) 100vw, 325px\" \/><\/a><br \/>\n<a href=\"https:\/\/ccssmathanswers.com\/big-ideas-math-answers-grade-3-chapter-7\/placevalue-7-1-14\/\" rel=\"attachment wp-att-18175\"><img loading=\"lazy\" class=\"alignnone wp-image-18175 size-full\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2020\/12\/Placevalue-7.1-13.jpg\" alt=\"\" width=\"310\" height=\"170\" srcset=\"https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2020\/12\/Placevalue-7.1-13.jpg 310w, https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2020\/12\/Placevalue-7.1-13-300x165.jpg 300w\" sizes=\"(max-width: 310px) 100vw, 310px\" \/><\/a><br \/>\nThe value of 2 in 325= 20<br \/>\nThe value of 1 in 541= 1<br \/>\nThe value of 6 in 653= 600<br \/>\nThe value of 4 in 194= 4<br \/>\n<a href=\"https:\/\/ccssmathanswers.com\/big-ideas-math-answers-grade-3-chapter-7\/16answer\/\" rel=\"attachment wp-att-16570\"><img loading=\"lazy\" class=\"alignnone wp-image-16570 size-full\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2020\/12\/16answer.png\" alt=\"\" width=\"243\" height=\"103\" \/><\/a><br \/>\n<strong>Write the value of the underlined digit<\/strong><\/p>\n<p>Question 5.<br \/>\n7<span style=\"text-decoration: underline;\">3<\/span>6<\/p>\n<p>Answer:<br \/>\n<a href=\"https:\/\/ccssmathanswers.com\/big-ideas-math-answers-grade-3-chapter-7\/7-1-place-value-practice\/\" rel=\"attachment wp-att-18178\"><img loading=\"lazy\" class=\"alignnone wp-image-18178 size-full\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2020\/12\/7.1-place-value-practice.png\" alt=\"\" width=\"305\" height=\"171\" srcset=\"https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2020\/12\/7.1-place-value-practice.png 305w, https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2020\/12\/7.1-place-value-practice-300x168.png 300w\" sizes=\"(max-width: 305px) 100vw, 305px\" \/><\/a><br \/>\n7 X 100 +3 X 10 +6 X 1=700+30+6 = 736<br \/>\nThe value of 3 digit in the number 736 is 3 tens or 30.<\/p>\n<p>Question 6.<br \/>\n<span style=\"text-decoration: underline;\">9<\/span>62<\/p>\n<p>Answer:<br \/>\n<a href=\"https:\/\/ccssmathanswers.com\/big-ideas-math-answers-grade-3-chapter-7\/7-1-place-value-practice-2\/\" rel=\"attachment wp-att-18181\"><img loading=\"lazy\" class=\"alignnone wp-image-18181 size-full\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2020\/12\/7.1-place-value-practice-1.png\" alt=\"\" width=\"319\" height=\"171\" srcset=\"https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2020\/12\/7.1-place-value-practice-1.png 319w, https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2020\/12\/7.1-place-value-practice-1-300x161.png 300w\" sizes=\"(max-width: 319px) 100vw, 319px\" \/><\/a><br \/>\n9 X 100+6 X 10+2 X 1=900+60+2 = 962<br \/>\nThe\u00a0 value of 9 digit in the number 962 is 9 hundreds or 900.<\/p>\n<p>Question 7.<br \/>\n89<span style=\"text-decoration: underline;\">7<\/span><\/p>\n<p>Answer:<br \/>\n<a href=\"https:\/\/ccssmathanswers.com\/big-ideas-math-answers-grade-3-chapter-7\/7-1-place-value-practice-3\/\" rel=\"attachment wp-att-18208\"><img loading=\"lazy\" class=\"alignnone wp-image-18208 size-full\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2020\/12\/7.1-place-value-practice-2.png\" alt=\"\" width=\"313\" height=\"170\" srcset=\"https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2020\/12\/7.1-place-value-practice-2.png 313w, https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2020\/12\/7.1-place-value-practice-2-300x163.png 300w\" sizes=\"(max-width: 313px) 100vw, 313px\" \/><\/a><br \/>\n8 X 100+9 X 10+7 X 1=800+90+7 = 897<br \/>\nThe value of 7 digit in the number 897 is\u00a0 7 one&#8217;s or 7<strong>.<\/strong><\/p>\n<p><strong>Identify the value of each digit.<br \/>\n<\/strong><br \/>\nQuestion 8.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-10644\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2020\/12\/Big-Ideas-Math-Answer-Key-Grade-3-Chapter-7-Round-and-Estimate-Numbers-7.1-13.png\" alt=\"Big Ideas Math Answer Key Grade 3 Chapter 7 Round and Estimate Numbers 7.1 13\" width=\"230\" height=\"103\" \/><\/p>\n<p>Answer:<br \/>\n<a href=\"https:\/\/ccssmathanswers.com\/big-ideas-math-answers-grade-3-chapter-7\/17ans\/\" rel=\"attachment wp-att-16614\"><img loading=\"lazy\" class=\"alignnone wp-image-16614 size-full\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2020\/12\/17ans.jpg\" alt=\"\" width=\"336\" height=\"167\" srcset=\"https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2020\/12\/17ans.jpg 336w, https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2020\/12\/17ans-300x149.jpg 300w\" sizes=\"(max-width: 336px) 100vw, 336px\" \/><\/a><\/p>\n<p>Question 9.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-10645\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2020\/12\/Big-Ideas-Math-Answer-Key-Grade-3-Chapter-7-Round-and-Estimate-Numbers-7.1-14.png\" alt=\"Big Ideas Math Answer Key Grade 3 Chapter 7 Round and Estimate Numbers 7.1 14\" width=\"227\" height=\"109\" \/><\/p>\n<p>Answer:<br \/>\n<a href=\"https:\/\/ccssmathanswers.com\/big-ideas-math-answers-grade-3-chapter-7\/18ans\/\" rel=\"attachment wp-att-16617\"><img loading=\"lazy\" class=\"alignnone wp-image-16617 size-full\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2020\/12\/18ans.jpg\" alt=\"\" width=\"329\" height=\"172\" srcset=\"https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2020\/12\/18ans.jpg 329w, https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2020\/12\/18ans-300x157.jpg 300w\" sizes=\"(max-width: 329px) 100vw, 329px\" \/><\/a><\/p>\n<p>Question 10.<br \/>\n<strong>DIG DEEPER!<\/strong><br \/>\nDescartes is thinking of a number. What is his number?<br \/>\nThe three digits of my number are 2, 7, and 5.<br \/>\nMy number is even.<br \/>\nMy number is less than 750.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-10646\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2020\/12\/Big-Ideas-Math-Answer-Key-Grade-3-Chapter-7-Round-and-Estimate-Numbers-7.1-15.png\" alt=\"Big Ideas Math Answer Key Grade 3 Chapter 7 Round and Estimate Numbers 7.1 15\" width=\"91\" height=\"133\" \/><\/p>\n<p>Answer:<br \/>\nThe three digits numbers are 2,7,5<br \/>\n<span style=\"text-decoration: underline;\">CONDITIONS<\/span> :<br \/>\nThe three digits numbers are 2,7,5<br \/>\nMy number is even.<br \/>\nMy number is less than 750.<br \/>\nSo, Among three digits 2 is even, the last digit is &#8220;2&#8221;<br \/>\nOut of 7 and 5 digits,5 &lt; 7. so the first digit in my number is 5.<br \/>\nThe middle digit is going to be 7.<br \/>\nHence,the three-digit my number= 572.<\/p>\n<p>Question 11.<br \/>\nModeling Real Life A skating rink gives out three hundred thirty glow sticks on Friday and 303 glow sticks on Saturday. On which day does the skating rink give out more glow sticks?<\/p>\n<p>Answer:<br \/>\nGlow\u00a0 sticks given on Friday = three hundred thirty<br \/>\n=3 x 100+3 x 10=300+30=330<br \/>\nGlow\u00a0 sticks given on Saturday=303<br \/>\nComparison:\u00a0 330 &gt; 303<br \/>\nHence, the day the skating rink given out more glow sticks is on Friday.<\/p>\n<p>Question 12.<br \/>\n<strong>DIG DEEPER!<\/strong><br \/>\nOrder the basketball field goals made in a season of the basketball players from least to greatest. Which player made the least number of field goals? Which made the most number of field goals?<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-10647\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2020\/12\/Big-Ideas-Math-Answer-Key-Grade-3-Chapter-7-Round-and-Estimate-Numbers-7.1-16.png\" alt=\"Big Ideas Math Answer Key Grade 3 Chapter 7 Round and Estimate Numbers 7.1 16\" width=\"271\" height=\"210\" \/><\/p>\n<p>Answer:<br \/>\n<a href=\"https:\/\/ccssmathanswers.com\/big-ideas-math-answers-grade-3-chapter-7\/19ans\/\" rel=\"attachment wp-att-16627\"><img loading=\"lazy\" class=\"alignnone wp-image-16627 size-full\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2020\/12\/19ANS.png\" alt=\"\" width=\"344\" height=\"179\" srcset=\"https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2020\/12\/19ANS.png 344w, https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2020\/12\/19ANS-300x156.png 300w\" sizes=\"(max-width: 344px) 100vw, 344px\" \/><\/a><br \/>\nPlayer who made the least number of field goals is D player.<br \/>\nPlayer who made the most number of field goals is C player.<\/p>\n<p><strong>Review &amp; Refresh<\/strong><br \/>\n<strong>Complete the related facts<\/strong><\/p>\n<p>Question 13.<br \/>\n9 \u00f7 3 = ____<br \/>\n3 \u00d7 ____ = 9<\/p>\n<p>Answer:<br \/>\n9 \u00f7 3 = 3<br \/>\n3 \u00d7 __3__ = 9<\/p>\n<p>Question 14.<br \/>\n40 \u00f7 8 = __5___<br \/>\n8 \u00d7 ___5_ = 40<\/p>\n<p>Answer:<br \/>\n40 \u00f7 8 = __5___<br \/>\n8 \u00d7 ___5_ = 40<\/p>\n<p>Question 15.<br \/>\n63 \u00f7 7 = __9__<br \/>\n7 \u00d7 ___9_ = 63<\/p>\n<p>Answer:<br \/>\n63 \u00f7 7 = __9__<br \/>\n7 \u00d7 __9___ = 63<\/p>\n<h3><a id=\"Lesson_7.2_Round_Numbers_Using_a_Number_Line\"><\/a>Lesson 7.2 Round Numbers Using a Number Line<\/h3>\n<p><strong>Explore and Grow<\/strong><br \/>\nPlot 32 on the number line. Circle the two closest multiples of ten.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-10648\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2020\/12\/Big-Ideas-Math-Answers-3rd-Grade-Chapter-7-Round-and-Estimate-Numbers-7.2-1.png\" alt=\"Big Ideas Math Answers 3rd Grade Chapter 7 Round and Estimate Numbers 7.2 1\" width=\"587\" height=\"69\" srcset=\"https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2020\/12\/Big-Ideas-Math-Answers-3rd-Grade-Chapter-7-Round-and-Estimate-Numbers-7.2-1.png 587w, https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2020\/12\/Big-Ideas-Math-Answers-3rd-Grade-Chapter-7-Round-and-Estimate-Numbers-7.2-1-300x35.png 300w\" sizes=\"(max-width: 587px) 100vw, 587px\" \/><br \/>\nWhich multiple of ten is 32 closer to?<\/p>\n<p>Answer:<br \/>\n<a href=\"https:\/\/ccssmathanswers.com\/?attachment_id=16637\" rel=\"attachment wp-att-16637\"><img loading=\"lazy\" class=\"alignnone wp-image-16637 size-full\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2020\/12\/20ANS.png\" alt=\"\" width=\"467\" height=\"137\" srcset=\"https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2020\/12\/20ANS.png 467w, https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2020\/12\/20ANS-300x88.png 300w\" sizes=\"(max-width: 467px) 100vw, 467px\" \/><\/a><br \/>\n<span style=\"color: #000000;\"><a style=\"color: #000000;\" href=\"https:\/\/ccssmathanswers.com\/big-ideas-math-answers-grade-3-chapter-7\/20ans-2\/\" rel=\"attachment wp-att-16638\">The two closest multiples of 32 ten<\/a> is 30 and 40.<\/span><br \/>\n<a href=\"https:\/\/ccssmathanswers.com\/big-ideas-math-answers-grade-3-chapter-7\/20ans-2\/\" rel=\"attachment wp-att-16638\"><img loading=\"lazy\" class=\"alignnone wp-image-16638 size-full\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2020\/12\/20ANS..jpg\" alt=\"\" width=\"467\" height=\"137\" srcset=\"https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2020\/12\/20ANS..jpg 467w, https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2020\/12\/20ANS.-300x88.jpg 300w\" sizes=\"(max-width: 467px) 100vw, 467px\" \/><\/a><br \/>\nHence, the multiple of ten close to 32 is 30.<\/p>\n<p><strong>Repeated Reasoning<\/strong><br \/>\nWhich multiple of ten is closer to 38? 31? 36? How did you decide? Explain.<\/p>\n<p>Answer:<br \/>\n<a href=\"https:\/\/ccssmathanswers.com\/big-ideas-math-answers-grade-3-chapter-7\/21ans\/\" rel=\"attachment wp-att-16641\"><img loading=\"lazy\" class=\"alignnone wp-image-16641 size-full\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2020\/12\/21ans.png\" alt=\"\" width=\"467\" height=\"137\" srcset=\"https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2020\/12\/21ans.png 467w, https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2020\/12\/21ans-300x88.png 300w\" sizes=\"(max-width: 467px) 100vw, 467px\" \/><\/a><br \/>\n38 is between 30 and 40.<br \/>\n38 is closer to 40 than it is to 30.<br \/>\nSo, 38 is rounded to the nearest ten to 40.<\/p>\n<p><strong>Think and Grow: Round Numbers Using a Number Line<\/strong><br \/>\nTo round a number to the nearest ten, replace the number with its nearest multiple of ten. When a number is half way between two multiples of ten, use the greater number.<br \/>\n<strong>Example<\/strong><br \/>\nRound 23 to the nearest ten.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-10649\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2020\/12\/Big-Ideas-Math-Answers-3rd-Grade-Chapter-7-Round-and-Estimate-Numbers-7.2-2.png\" alt=\"Big Ideas Math Answers 3rd Grade Chapter 7 Round and Estimate Numbers 7.2 2\" width=\"298\" height=\"111\" \/><br \/>\n23 is between 20 and 30.<br \/>\n23 is closer to ___ than it is to _____. So, 23 rounded to the nearest ten is _____<\/p>\n<p>Answer:<br \/>\n<img src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2020\/12\/Big-Ideas-Math-Answers-3rd-Grade-Chapter-7-Round-and-Estimate-Numbers-7.2-2.png\" alt=\"Big Ideas Math Answers 3rd Grade Chapter 7 Round and Estimate Numbers 7.2 2\" \/><br \/>\n23 is between 20 and 30.<br \/>\n23 is closer to 20 than it is to 30.<br \/>\nSo, 23 rounded to the nearest ten is 20.<\/p>\n<p><strong>Example<\/strong><br \/>\nRound 175 to the nearest ten<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-10650\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2020\/12\/Big-Ideas-Math-Answers-3rd-Grade-Chapter-7-Round-and-Estimate-Numbers-7.2-3.png\" alt=\"Big Ideas Math Answers 3rd Grade Chapter 7 Round and Estimate Numbers 7.2 3\" width=\"292\" height=\"113\" \/><br \/>\n175 is halfway between 170 and 180.<br \/>\nSo, 175 rounded to the nearest ten is _____.<br \/>\nYou can round a number to the nearest hundred in a similar way.<\/p>\n<p>Answer:<br \/>\n<img src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2020\/12\/Big-Ideas-Math-Answers-3rd-Grade-Chapter-7-Round-and-Estimate-Numbers-7.2-3.png\" alt=\"Big Ideas Math Answers 3rd Grade Chapter 7 Round and Estimate Numbers 7.2 3\" \/><br \/>\n175 is halfway between 170 and 180.<br \/>\n175 rounded to the Nearest Ten is 180.<br \/>\nSo, the Nearest Hundred\u00a0 Value of 175 is 200.<\/p>\n<p><strong>Example<\/strong><br \/>\nRound 465 to the nearest hundred<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-10651\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2020\/12\/Big-Ideas-Math-Answers-3rd-Grade-Chapter-7-Round-and-Estimate-Numbers-7.2-4.png\" alt=\"Big Ideas Math Answers 3rd Grade Chapter 7 Round and Estimate Numbers 7.2 4\" width=\"534\" height=\"90\" srcset=\"https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2020\/12\/Big-Ideas-Math-Answers-3rd-Grade-Chapter-7-Round-and-Estimate-Numbers-7.2-4.png 534w, https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2020\/12\/Big-Ideas-Math-Answers-3rd-Grade-Chapter-7-Round-and-Estimate-Numbers-7.2-4-300x51.png 300w\" sizes=\"(max-width: 534px) 100vw, 534px\" \/><br \/>\n465 is close to ____ than it is to ____.<br \/>\nSo, 465 rounded to the nearest hundred is _____.<\/p>\n<p>Answer:<br \/>\n<a href=\"https:\/\/ccssmathanswers.com\/big-ideas-math-answers-grade-3-chapter-7\/7-1-round-numbers-465\/\" rel=\"attachment wp-att-18435\"><img loading=\"lazy\" class=\"alignnone size-full wp-image-18435\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2020\/12\/7.1-round-numbers-465.png\" alt=\"\" width=\"586\" height=\"114\" srcset=\"https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2020\/12\/7.1-round-numbers-465.png 586w, https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2020\/12\/7.1-round-numbers-465-300x58.png 300w\" sizes=\"(max-width: 586px) 100vw, 586px\" \/><\/a><br \/>\n465 is halfway in between\u00a0 460 and 470.<br \/>\nSo, the Nearest Hundred Value of 465 is 500.<\/p>\n<p><strong>Show and Grow<\/strong><\/p>\n<p>Question 1.<br \/>\nRound 59 to the nearest ten _____.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-10652\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2020\/12\/Big-Ideas-Math-Answers-3rd-Grade-Chapter-7-Round-and-Estimate-Numbers-7.2-5.png\" alt=\"Big Ideas Math Answers 3rd Grade Chapter 7 Round and Estimate Numbers 7.2 5\" width=\"289\" height=\"55\" \/><\/p>\n<p>Answer:<br \/>\n<a href=\"https:\/\/ccssmathanswers.com\/big-ideas-math-answers-grade-3-chapter-7\/22ans\/\" rel=\"attachment wp-att-16643\"><img loading=\"lazy\" class=\"alignnone wp-image-16643 size-full\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2020\/12\/22ans.jpg\" alt=\"\" width=\"467\" height=\"128\" srcset=\"https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2020\/12\/22ans.jpg 467w, https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2020\/12\/22ans-300x82.jpg 300w\" sizes=\"(max-width: 467px) 100vw, 467px\" \/><\/a><br \/>\nThe Nearest Ten of 59\u00a0 is 60.<\/p>\n<p>Question 2.<br \/>\nRound 350 to the nearest ten _____.<\/p>\n<p>Answer:<br \/>\n<a href=\"https:\/\/ccssmathanswers.com\/big-ideas-math-answers-grade-3-chapter-7\/23ans\/\" rel=\"attachment wp-att-16644\"><img loading=\"lazy\" class=\"alignnone wp-image-16644 size-full\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2020\/12\/23ans.jpg\" alt=\"\" width=\"467\" height=\"128\" srcset=\"https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2020\/12\/23ans.jpg 467w, https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2020\/12\/23ans-300x82.jpg 300w\" sizes=\"(max-width: 467px) 100vw, 467px\" \/><\/a><br \/>\nThe Nearest Ten is 350 is 350.<\/p>\n<p><strong>Apply and Grow: Practice<\/strong><br \/>\nRound the number to the nearest ten and to the nearest hundred\/<\/p>\n<p>Question 3.<br \/>\n203<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-10654\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2020\/12\/Big-Ideas-Math-Answers-3rd-Grade-Chapter-7-Round-and-Estimate-Numbers-7.2-7.png\" alt=\"Big Ideas Math Answers 3rd Grade Chapter 7 Round and Estimate Numbers 7.2 7\" width=\"646\" height=\"121\" srcset=\"https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2020\/12\/Big-Ideas-Math-Answers-3rd-Grade-Chapter-7-Round-and-Estimate-Numbers-7.2-7.png 646w, https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2020\/12\/Big-Ideas-Math-Answers-3rd-Grade-Chapter-7-Round-and-Estimate-Numbers-7.2-7-300x56.png 300w\" sizes=\"(max-width: 646px) 100vw, 646px\" \/><\/p>\n<p>Answer:<br \/>\n<a href=\"https:\/\/ccssmathanswers.com\/big-ideas-math-answers-grade-3-chapter-7\/24ans\/\" rel=\"attachment wp-att-16646\"><img loading=\"lazy\" class=\"alignnone wp-image-16646 size-full\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2020\/12\/24ans.jpg\" alt=\"\" width=\"240\" height=\"127\" \/><\/a><br \/>\nNearest Ten: 200<br \/>\n<a href=\"https:\/\/ccssmathanswers.com\/big-ideas-math-answers-grade-3-chapter-7\/24ans-3\/\" rel=\"attachment wp-att-16648\"><img loading=\"lazy\" class=\"alignnone size-full wp-image-16648\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2020\/12\/24ANS...jpg\" alt=\"\" width=\"239\" height=\"125\" \/><\/a><br \/>\nNearest Hundred: 200<br \/>\nQuestion 4.<br \/>\n75<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-10655\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2020\/12\/Big-Ideas-Math-Answers-3rd-Grade-Chapter-7-Round-and-Estimate-Numbers-7.2-8.png\" alt=\"Big Ideas Math Answers 3rd Grade Chapter 7 Round and Estimate Numbers 7.2 8\" width=\"626\" height=\"120\" srcset=\"https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2020\/12\/Big-Ideas-Math-Answers-3rd-Grade-Chapter-7-Round-and-Estimate-Numbers-7.2-8.png 626w, https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2020\/12\/Big-Ideas-Math-Answers-3rd-Grade-Chapter-7-Round-and-Estimate-Numbers-7.2-8-300x58.png 300w\" sizes=\"(max-width: 626px) 100vw, 626px\" \/><\/p>\n<p>Answer:<br \/>\n<strong> <a href=\"https:\/\/ccssmathanswers.com\/big-ideas-math-answers-grade-3-chapter-7\/25ans\/\" rel=\"attachment wp-att-16650\"><img loading=\"lazy\" class=\"alignnone wp-image-16650 size-full\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2020\/12\/25ANS.jpg\" alt=\"\" width=\"230\" height=\"106\" \/><\/a><\/strong><br \/>\nNearest Ten of 75 is 80.<br \/>\n<a href=\"https:\/\/ccssmathanswers.com\/big-ideas-math-answers-grade-3-chapter-7\/25ans1\/\" rel=\"attachment wp-att-16651\"><img loading=\"lazy\" class=\"alignnone size-full wp-image-16651\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2020\/12\/25ANS1.jpg\" alt=\"\" width=\"233\" height=\"109\" \/><\/a><br \/>\nThe nearest Hundred of 75 is 100.<\/p>\n<p>Question 5.<br \/>\n961<br \/>\nNearest ten: ______<br \/>\nNearest hundred: _____<\/p>\n<p>Answer:<br \/>\nNearest Ten of 961 is 960.<br \/>\n<a href=\"https:\/\/ccssmathanswers.com\/big-ideas-math-answers-grade-3-chapter-7\/27ans\/\" rel=\"attachment wp-att-16747\"><img loading=\"lazy\" class=\"alignnone wp-image-16747 size-full\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2020\/12\/27ans.png\" alt=\"\" width=\"246\" height=\"121\" \/><\/a><br \/>\nNearest Hundred of 961 is 1000<\/p>\n<p>Question 6.<br \/>\n47<br \/>\nNearest ten: _______<br \/>\nNearest hundred: _____<\/p>\n<p>Answer:<br \/>\n<a href=\"https:\/\/ccssmathanswers.com\/big-ideas-math-answers-grade-3-chapter-7\/7-2-apply-n-grow-round-number\/\" rel=\"attachment wp-att-18436\"><img loading=\"lazy\" class=\"alignnone size-full wp-image-18436\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2020\/12\/7.2-apply-n-grow-round-number.png\" alt=\"\" width=\"552\" height=\"119\" srcset=\"https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2020\/12\/7.2-apply-n-grow-round-number.png 552w, https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2020\/12\/7.2-apply-n-grow-round-number-300x65.png 300w\" sizes=\"(max-width: 552px) 100vw, 552px\" \/><\/a><\/p>\n<p>Nearest Ten of 47 is 50.<br \/>\n<a href=\"https:\/\/ccssmathanswers.com\/big-ideas-math-answers-grade-3-chapter-7\/28ans\/\" rel=\"attachment wp-att-16751\"><img loading=\"lazy\" class=\"alignnone size-full wp-image-16751\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2020\/12\/28ans.png\" alt=\"\" width=\"249\" height=\"131\" \/><\/a><br \/>\nNearest Hundred of 47 is 0.<\/p>\n<p>Question 7.<br \/>\n<strong>DIG DEEPER!<\/strong><br \/>\nRound ? to the nearest ten and to the nearest hundred<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-10656\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2020\/12\/Big-Ideas-Math-Answers-3rd-Grade-Chapter-7-Round-and-Estimate-Numbers-7.2-9.png\" alt=\"Big Ideas Math Answers 3rd Grade Chapter 7 Round and Estimate Numbers 7.2 9\" width=\"310\" height=\"85\" srcset=\"https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2020\/12\/Big-Ideas-Math-Answers-3rd-Grade-Chapter-7-Round-and-Estimate-Numbers-7.2-9.png 310w, https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2020\/12\/Big-Ideas-Math-Answers-3rd-Grade-Chapter-7-Round-and-Estimate-Numbers-7.2-9-300x82.png 300w\" sizes=\"(max-width: 310px) 100vw, 310px\" \/><br \/>\nNearest ten: ____<br \/>\nNearest hundred: ______<\/p>\n<p>Answer:<\/p>\n<p><img src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2020\/12\/Big-Ideas-Math-Answers-3rd-Grade-Chapter-7-Round-and-Estimate-Numbers-7.2-9.png\" alt=\"Big Ideas Math Answers 3rd Grade Chapter 7 Round and Estimate Numbers 7.2 9\" \/><br \/>\nNearest Ten is 550<br \/>\nNearest Hundred is 600.<\/p>\n<p><strong>Think and Grow: Modeling Real Life<\/strong><br \/>\nOn which days does the school collect about 90 food items?<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-10657\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2020\/12\/Big-Ideas-Math-Answers-3rd-Grade-Chapter-7-Round-and-Estimate-Numbers-7.2-10.png\" alt=\"Big Ideas Math Answers 3rd Grade Chapter 7 Round and Estimate Numbers 7.2 10\" width=\"268\" height=\"244\" \/><br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-10658\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2020\/12\/Big-Ideas-Math-Answers-3rd-Grade-Chapter-7-Round-and-Estimate-Numbers-7.2-11.png\" alt=\"Big Ideas Math Answers 3rd Grade Chapter 7 Round and Estimate Numbers 7.2 11\" width=\"328\" height=\"70\" srcset=\"https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2020\/12\/Big-Ideas-Math-Answers-3rd-Grade-Chapter-7-Round-and-Estimate-Numbers-7.2-11.png 328w, https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2020\/12\/Big-Ideas-Math-Answers-3rd-Grade-Chapter-7-Round-and-Estimate-Numbers-7.2-11-300x64.png 300w\" sizes=\"(max-width: 328px) 100vw, 328px\" \/><br \/>\nThe school collects about 90 food and items on _____ and _____<\/p>\n<p>Answer:<br \/>\n<a href=\"https:\/\/ccssmathanswers.com\/big-ideas-math-answers-grade-3-chapter-7\/29ans\/\" rel=\"attachment wp-att-16754\"><img loading=\"lazy\" class=\"alignnone wp-image-16754 size-full\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2020\/12\/29ans.png\" alt=\"\" width=\"258\" height=\"118\" \/><\/a><br \/>\nThe school collects about 90 food and items on Monday and Thursday because they are nearest to 90 on number line.<\/p>\n<p><strong>Show and Grow<\/strong><\/p>\n<p>Question 8.<br \/>\nUse the table above to and on which days the school collects about 80 food items.<\/p>\n<p>Answer:<br \/>\n<a href=\"https:\/\/ccssmathanswers.com\/big-ideas-math-answers-grade-3-chapter-7\/29ans\/\" rel=\"attachment wp-att-16754\"><img loading=\"lazy\" class=\"alignnone wp-image-16754 size-full\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2020\/12\/29ans.png\" alt=\"\" width=\"258\" height=\"118\" \/><\/a><br \/>\nThe school collects about 80 food and items on Wednesday and Friday because they are nearest to 80 on number line.<\/p>\n<p>Question 9.<br \/>\nYour teacher wants you to read a book with about 200 pages. Circle the books you can read. Explain.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-10659\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2020\/12\/Big-Ideas-Math-Answers-3rd-Grade-Chapter-7-Round-and-Estimate-Numbers-7.2-12.png\" alt=\"Big Ideas Math Answers 3rd Grade Chapter 7 Round and Estimate Numbers 7.2 12\" width=\"593\" height=\"166\" srcset=\"https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2020\/12\/Big-Ideas-Math-Answers-3rd-Grade-Chapter-7-Round-and-Estimate-Numbers-7.2-12.png 593w, https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2020\/12\/Big-Ideas-Math-Answers-3rd-Grade-Chapter-7-Round-and-Estimate-Numbers-7.2-12-300x84.png 300w\" sizes=\"(max-width: 593px) 100vw, 593px\" \/><\/p>\n<p>Answer:<\/p>\n<p><a href=\"https:\/\/ccssmathanswers.com\/big-ideas-math-answers-grade-3-chapter-7\/30-3\/\" rel=\"attachment wp-att-16759\"><img loading=\"lazy\" class=\"alignnone size-full wp-image-16759\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2020\/12\/30.jpg\" alt=\"\" width=\"593\" height=\"200\" srcset=\"https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2020\/12\/30.jpg 593w, https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2020\/12\/30-300x101.jpg 300w\" sizes=\"(max-width: 593px) 100vw, 593px\" \/><\/a><br \/>\nBooks contains 200 about pages are 272 pages and 238 pages because these books having pages of 200 pages and above.<br \/>\nQuestion 10.<br \/>\n<strong>DIG DEEPER!<\/strong><br \/>\nThere are 9 rows and 9 columns of soup cans on a shelf. Round the number of soup cans in all to the nearest ten and to the nearest hundred.<\/p>\n<p>Answer:<br \/>\nNumber of rows of soups=9<br \/>\nNumber of columns of soups=9<br \/>\nTotal number of cans of soups in all shelf=9 x 9=81<br \/>\nNearest Ten of 81= 80<br \/>\nNearest Hundred of 81=100<\/p>\n<h3><a id=\"Round_Numbers_Using_a_Number_Line_Homework_&amp;_Practice_7.2\"><\/a>Round Numbers Using a Number Line Homework &amp; Practice 7.2<\/h3>\n<p><strong>Round the number to the nearest ten and to the nearest hundred.<\/strong><\/p>\n<p>Question 1.<br \/>\n39<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-10660\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2020\/12\/Big-Ideas-Math-Answers-3rd-Grade-Chapter-7-Round-and-Estimate-Numbers-7.2-13.png\" alt=\"Big Ideas Math Answers 3rd Grade Chapter 7 Round and Estimate Numbers 7.2 13\" width=\"628\" height=\"121\" srcset=\"https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2020\/12\/Big-Ideas-Math-Answers-3rd-Grade-Chapter-7-Round-and-Estimate-Numbers-7.2-13.png 628w, https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2020\/12\/Big-Ideas-Math-Answers-3rd-Grade-Chapter-7-Round-and-Estimate-Numbers-7.2-13-300x58.png 300w\" sizes=\"(max-width: 628px) 100vw, 628px\" \/><\/p>\n<p>Answer:<br \/>\n<img src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2020\/12\/Big-Ideas-Math-Answers-3rd-Grade-Chapter-7-Round-and-Estimate-Numbers-7.2-13.png\" alt=\"Big Ideas Math Answers 3rd Grade Chapter 7 Round and Estimate Numbers 7.2 13\" \/><\/p>\n<p><a href=\"https:\/\/ccssmathanswers.com\/?attachment_id=18410\" rel=\"attachment wp-att-18410\"><img loading=\"lazy\" class=\"alignnone wp-image-18410 size-full\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2020\/12\/7.2-round-number-practice-1.png\" alt=\"\" width=\"595\" height=\"99\" srcset=\"https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2020\/12\/7.2-round-number-practice-1.png 595w, https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2020\/12\/7.2-round-number-practice-1-300x50.png 300w\" sizes=\"(max-width: 595px) 100vw, 595px\" \/><\/a><br \/>\n39 lies between 30 and 40.<br \/>\nSo, the Nearest Ten of 39 is 40.<\/p>\n<p><a href=\"https:\/\/ccssmathanswers.com\/big-ideas-math-answers-grade-3-chapter-7\/7-2-round-number-practice-3\/\" rel=\"attachment wp-att-18412\"><img loading=\"lazy\" class=\"alignnone wp-image-18412 size-full\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2020\/12\/7.2-round-number-practice-2.png\" alt=\"\" width=\"557\" height=\"124\" srcset=\"https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2020\/12\/7.2-round-number-practice-2.png 557w, https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2020\/12\/7.2-round-number-practice-2-300x67.png 300w\" sizes=\"(max-width: 557px) 100vw, 557px\" \/><\/a><\/p>\n<p>39 lies between 0 and 100.<br \/>\nSo, the Nearest Hundred of 39 is 100.<\/p>\n<p>Question 2.<br \/>\n156<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-10661\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2020\/12\/Big-Ideas-Math-Answers-3rd-Grade-Chapter-7-Round-and-Estimate-Numbers-7.2-14.png\" alt=\"Big Ideas Math Answers 3rd Grade Chapter 7 Round and Estimate Numbers 7.2 14\" width=\"633\" height=\"115\" srcset=\"https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2020\/12\/Big-Ideas-Math-Answers-3rd-Grade-Chapter-7-Round-and-Estimate-Numbers-7.2-14.png 633w, https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2020\/12\/Big-Ideas-Math-Answers-3rd-Grade-Chapter-7-Round-and-Estimate-Numbers-7.2-14-300x55.png 300w\" sizes=\"(max-width: 633px) 100vw, 633px\" \/><\/p>\n<p>Answer:<br \/>\n<a href=\"https:\/\/ccssmathanswers.com\/big-ideas-math-answers-grade-3-chapter-7\/7-2-round-number-practice-4\/\" rel=\"attachment wp-att-18413\"><img loading=\"lazy\" class=\"alignnone wp-image-18413 size-full\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2020\/12\/7.2-round-number-practice-3.png\" alt=\"\" width=\"543\" height=\"100\" srcset=\"https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2020\/12\/7.2-round-number-practice-3.png 543w, https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2020\/12\/7.2-round-number-practice-3-300x55.png 300w\" sizes=\"(max-width: 543px) 100vw, 543px\" \/><\/a><br \/>\n156 lies in between 150 and 160.<br \/>\nSo, the Nearest ten of 156 is 160.<\/p>\n<p><a href=\"https:\/\/ccssmathanswers.com\/big-ideas-math-answers-grade-3-chapter-7\/7-2-round-number-practice-5\/\" rel=\"attachment wp-att-18414\"><img loading=\"lazy\" class=\"alignnone wp-image-18414 size-full\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2020\/12\/7.2-round-number-practice-4.png\" alt=\"\" width=\"552\" height=\"98\" srcset=\"https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2020\/12\/7.2-round-number-practice-4.png 552w, https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2020\/12\/7.2-round-number-practice-4-300x53.png 300w\" sizes=\"(max-width: 552px) 100vw, 552px\" \/><\/a><\/p>\n<p>156 lies in between 100 and 200.<br \/>\nSo, the Nearest Hundred of 156 is 200.<br \/>\n<strong>Round the number to the nearest ten and to the nearest hundred.<\/strong><\/p>\n<p>Question 3.<br \/>\n402<br \/>\nNearest ten: _____<br \/>\nNearest hundred: _____<\/p>\n<p>Answer:<br \/>\n<a href=\"https:\/\/ccssmathanswers.com\/big-ideas-math-answers-grade-3-chapter-7\/7-2-round-number-practice-6\/\" rel=\"attachment wp-att-18415\"><img loading=\"lazy\" class=\"alignnone wp-image-18415 size-full\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2020\/12\/7.2-round-number-practice-5.png\" alt=\"\" width=\"577\" height=\"124\" srcset=\"https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2020\/12\/7.2-round-number-practice-5.png 577w, https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2020\/12\/7.2-round-number-practice-5-300x64.png 300w\" sizes=\"(max-width: 577px) 100vw, 577px\" \/><\/a><br \/>\n402 lies in between 400 and 410.<br \/>\nSo, the Nearest Ten of 402 is 400.<\/p>\n<p><a href=\"https:\/\/ccssmathanswers.com\/big-ideas-math-answers-grade-3-chapter-7\/7-2-apply-n-grow-round-number-2\/\" rel=\"attachment wp-att-18438\"><img loading=\"lazy\" class=\"alignnone size-full wp-image-18438\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2020\/12\/7.2-apply-n-grow-round-number-1.png\" alt=\"\" width=\"556\" height=\"110\" srcset=\"https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2020\/12\/7.2-apply-n-grow-round-number-1.png 556w, https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2020\/12\/7.2-apply-n-grow-round-number-1-300x59.png 300w\" sizes=\"(max-width: 556px) 100vw, 556px\" \/><\/a><\/p>\n<p>402 lies in between 400 and 500.<br \/>\nSo, the Nearest Hundred of 402 is 400.<\/p>\n<p>Question 4.<br \/>\n627<br \/>\nNearest ten: _____<br \/>\nNearest hundred: ______<\/p>\n<p>Answer:<br \/>\n<a href=\"https:\/\/ccssmathanswers.com\/big-ideas-math-answers-grade-3-chapter-7\/7-2-round-number-practice-8\/\" rel=\"attachment wp-att-18417\"><img loading=\"lazy\" class=\"alignnone wp-image-18417 size-full\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2020\/12\/7.2-round-number-practice-7.png\" alt=\"\" width=\"573\" height=\"140\" srcset=\"https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2020\/12\/7.2-round-number-practice-7.png 573w, https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2020\/12\/7.2-round-number-practice-7-300x73.png 300w\" sizes=\"(max-width: 573px) 100vw, 573px\" \/><\/a><br \/>\n627 lies in between 620 and 630.<br \/>\nSo, the Nearest Ten of 627 is 630.<\/p>\n<p><a href=\"https:\/\/ccssmathanswers.com\/big-ideas-math-answers-grade-3-chapter-7\/7-2-round-number-practice-9\/\" rel=\"attachment wp-att-18418\"><img loading=\"lazy\" class=\"alignnone wp-image-18418 size-full\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2020\/12\/7.2-round-number-practice-8.png\" alt=\"\" width=\"560\" height=\"127\" srcset=\"https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2020\/12\/7.2-round-number-practice-8.png 560w, https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2020\/12\/7.2-round-number-practice-8-300x68.png 300w\" sizes=\"(max-width: 560px) 100vw, 560px\" \/><\/a><\/p>\n<p>627 lies in between 600 and 700.<br \/>\nSo, the Nearest Hundred of 627 is 600.<\/p>\n<p>Question 5.<br \/>\nWriting<br \/>\nExplain how to use a number line to round 24 to the nearest ten.<\/p>\n<p>Answer:<br \/>\n<a href=\"https:\/\/ccssmathanswers.com\/big-ideas-math-answers-grade-3-chapter-7\/31ans\/\" rel=\"attachment wp-att-17072\"><img loading=\"lazy\" class=\"alignnone wp-image-17072 size-full\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2020\/12\/31ans.jpg\" alt=\"\" width=\"467\" height=\"60\" srcset=\"https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2020\/12\/31ans.jpg 467w, https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2020\/12\/31ans-300x39.jpg 300w\" sizes=\"(max-width: 467px) 100vw, 467px\" \/><\/a><br \/>\nA line on which numbers are marked at intervals used to illustrate simple numerical operations is known as a number line.<br \/>\n24 is closest to 20 because the number does not cross half way between 20 and 30 on the line. Hence, rounded 24 to the nearest ten is 20.<\/p>\n<p>Question 6.<br \/>\n<strong>Modeling Real Life<\/strong><br \/>\nYour class is painting stones for a garden mosaic. On which days does your class paint about 30 stones?<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-10662\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2020\/12\/Big-Ideas-Math-Answers-3rd-Grade-Chapter-7-Round-and-Estimate-Numbers-7.2-15.png\" alt=\"Big Ideas Math Answers 3rd Grade Chapter 7 Round and Estimate Numbers 7.2 15\" width=\"264\" height=\"238\" \/><\/p>\n<p>Answer:<br \/>\n<img loading=\"lazy\" class=\"alignnone\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2020\/12\/Big-Ideas-Math-Answers-3rd-Grade-Chapter-7-Round-and-Estimate-Numbers-7.2-15.png\" alt=\"Big Ideas Math Answers 3rd Grade Chapter 7 Round and Estimate Numbers 7.2 15\" width=\"264\" height=\"238\" \/><br \/>\nThe class paint about 30 stones on Monday and Friday because on these days the paints are above and about 30.<\/p>\n<p>Question 7.<br \/>\n<strong>Modeling Real Life<\/strong><br \/>\nA giant panda eats about 300 pounds of bamboo every week. Which weights of bamboo can a zookeeper buy to\u00a0 feed a giant panda for a week?<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-10663\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2020\/12\/Big-Ideas-Math-Answers-3rd-Grade-Chapter-7-Round-and-Estimate-Numbers-7.2-16.png\" alt=\"Big Ideas Math Answers 3rd Grade Chapter 7 Round and Estimate Numbers 7.2 16\" width=\"274\" height=\"158\" \/><\/p>\n<p>Answer:<br \/>\n<img src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2020\/12\/Big-Ideas-Math-Answers-3rd-Grade-Chapter-7-Round-and-Estimate-Numbers-7.2-16.png\" alt=\"Big Ideas Math Answers 3rd Grade Chapter 7 Round and Estimate Numbers 7.2 16\" \/><br \/>\nWeight of bamboo eats the giant panda per week= 300 pounds<br \/>\nHence,weights of bamboo a zookeeper buys to\u00a0 feed the giant panda for a week= 310 and 340 pounds(because these two are more than 300 pounds).<br \/>\n<strong>Review &amp; Refresh<\/strong><br \/>\n<strong>Tell whether the product is even or odd.<\/strong><\/p>\n<p>Question 8.<br \/>\n3 \u00d7 5 ______<\/p>\n<p>Answer:<br \/>\n3 x 5 = 15<\/p>\n<p>So,15 is odd number.<\/p>\n<p>Question 9.<br \/>\n10 \u00d7 8 ______<\/p>\n<p>Answer:<br \/>\n10 x 8 = 80<br \/>\nSo, 80 is even number.<\/p>\n<p>Question 10.<br \/>\n7 \u00d7 2 _____<\/p>\n<p>Answer:<br \/>\n7 x 2 = 14<br \/>\nSo, 14 is even number.<\/p>\n<h3><a id=\"Lesson_7.3_Round_Numbers_Using_a_Place_Value\"><\/a>Lesson 7.3 Round Numbers Using Place Value<\/h3>\n<p><strong>Explore and Grow<\/strong><br \/>\nPlot 376 on each number line. Round the number to the nearest ten and to the nearest hundred.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-10664\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2020\/12\/Big-Ideas-Math-Answers-Grade-3-Chapter-7-Round-and-Estimate-Numbers-7.3-1.png\" alt=\"Big Ideas Math Answers Grade 3 Chapter 7 Round and Estimate Numbers 7.3 1\" width=\"589\" height=\"156\" srcset=\"https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2020\/12\/Big-Ideas-Math-Answers-Grade-3-Chapter-7-Round-and-Estimate-Numbers-7.3-1.png 589w, https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2020\/12\/Big-Ideas-Math-Answers-Grade-3-Chapter-7-Round-and-Estimate-Numbers-7.3-1-300x79.png 300w\" sizes=\"(max-width: 589px) 100vw, 589px\" \/><br \/>\nNearest ten: ______<br \/>\nNearest hundred: ______<\/p>\n<p>Answer:<br \/>\n<a href=\"https:\/\/ccssmathanswers.com\/?attachment_id=17076\" rel=\"attachment wp-att-17076\"><img loading=\"lazy\" class=\"alignnone wp-image-17076 size-full\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2020\/12\/32ans.jpg\" alt=\"\" width=\"339\" height=\"66\" srcset=\"https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2020\/12\/32ans.jpg 339w, https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2020\/12\/32ans-300x58.jpg 300w\" sizes=\"(max-width: 339px) 100vw, 339px\" \/><\/a><br \/>\nNearest Ten of 376 is 380<br \/>\n<a href=\"https:\/\/ccssmathanswers.com\/big-ideas-math-answers-grade-3-chapter-7\/32ans1\/\" rel=\"attachment wp-att-17078\"><img loading=\"lazy\" class=\"alignnone size-full wp-image-17078\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2020\/12\/32ans1.jpg\" alt=\"\" width=\"465\" height=\"90\" srcset=\"https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2020\/12\/32ans1.jpg 465w, https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2020\/12\/32ans1-300x58.jpg 300w\" sizes=\"(max-width: 465px) 100vw, 465px\" \/><\/a><br \/>\nNearest Hundred of 376 is 400.<br \/>\n<strong>Reasoning<\/strong><br \/>\nHow can you round the number without using the number line?<\/p>\n<p>Answer:<br \/>\nWe can round the number without using the number line by checking if it is less than 5, then the digit in the place you are rounding decreases by 1. If it is 5 or greater, then the digit in the place you are rounding increases by 1 .<\/p>\n<p><strong>Think and Grow: Round Numbers Using Place Value<\/strong><br \/>\nUse Place Value to Round Numbers<br \/>\n\u2022 Find the place to which you are rounding.<br \/>\n\u2022 Look at the digit to the right. If it is less than 5, then the digit in the place you are rounding stays the same. If it is 5 or greater, then the digit in the place you are rounding increases by 1.<br \/>\n\u2022 Write Zeros for the digits to the right of the place you are rounding.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-10665\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2020\/12\/Big-Ideas-Math-Answers-Grade-3-Chapter-7-Round-and-Estimate-Numbers-7.3-2.1.png\" alt=\"Big Ideas Math Answers Grade 3 Chapter 7 Round and Estimate Numbers 7.3 2.1\" width=\"276\" height=\"148\" \/><br \/>\n<strong>Example<\/strong><br \/>\nRound 68 to the nearest ten.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-10666\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2020\/12\/Big-Ideas-Math-Answers-Grade-3-Chapter-7-Round-and-Estimate-Numbers-7.3-2.png\" alt=\"Big Ideas Math Answers Grade 3 Chapter 7 Round and Estimate Numbers 7.3 2\" width=\"170\" height=\"171\" srcset=\"https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2020\/12\/Big-Ideas-Math-Answers-Grade-3-Chapter-7-Round-and-Estimate-Numbers-7.3-2.png 170w, https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2020\/12\/Big-Ideas-Math-Answers-Grade-3-Chapter-7-Round-and-Estimate-Numbers-7.3-2-150x150.png 150w\" sizes=\"(max-width: 170px) 100vw, 170px\" \/><br \/>\n68 rounded to the nearest ten is ______.<\/p>\n<p>Answer:<br \/>\n<img src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2020\/12\/Big-Ideas-Math-Answers-Grade-3-Chapter-7-Round-and-Estimate-Numbers-7.3-2.png\" alt=\"Big Ideas Math Answers Grade 3 Chapter 7 Round and Estimate Numbers 7.3 2\" \/><br \/>\nThe Nearest Ten\u00a0 of\u00a0 68 is 70.<br \/>\n<strong>Example<\/strong><br \/>\nRound 235 to the nearest hundred and to the nearest ten.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-10667\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2020\/12\/Big-Ideas-Math-Answers-Grade-3-Chapter-7-Round-and-Estimate-Numbers-7.3-3.png\" alt=\"Big Ideas Math Answers Grade 3 Chapter 7 Round and Estimate Numbers 7.3 3\" width=\"294\" height=\"182\" \/><br \/>\n235 rounded to the nearest hundred is ____. 235 rounded to the nearest ten is ____.<\/p>\n<p>Answer:<br \/>\n<img src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2020\/12\/Big-Ideas-Math-Answers-Grade-3-Chapter-7-Round-and-Estimate-Numbers-7.3-3.png\" alt=\"Big Ideas Math Answers Grade 3 Chapter 7 Round and Estimate Numbers 7.3 3\" \/><br \/>\nThe Nearest Hundred of 235 is 200.<br \/>\nThe Nearest Ten of 235 is 240.<\/p>\n<p><strong>Show and Grow<\/strong><br \/>\n<strong>Round the number to the nearest ten.<\/strong><\/p>\n<p>Question 1.<br \/>\n41 _____<\/p>\n<p>Answer:<\/p>\n<p><a href=\"https:\/\/ccssmathanswers.com\/big-ideas-math-answers-grade-3-chapter-7\/7-3-round-numbers-glow-n-show\/\" rel=\"attachment wp-att-18419\"><img loading=\"lazy\" class=\"alignnone wp-image-18419 size-full\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2020\/12\/7.3-round-numbers-glow-n-show.png\" alt=\"\" width=\"566\" height=\"107\" srcset=\"https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2020\/12\/7.3-round-numbers-glow-n-show.png 566w, https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2020\/12\/7.3-round-numbers-glow-n-show-300x57.png 300w\" sizes=\"(max-width: 566px) 100vw, 566px\" \/><\/a><br \/>\n41 lies in between 40 and 50.<br \/>\nSo, Nearest Ten of 41 is 40.<\/p>\n<p>Question 2.<br \/>\n85 _____<\/p>\n<p>Answer:<br \/>\n<a href=\"https:\/\/ccssmathanswers.com\/big-ideas-math-answers-grade-3-chapter-7\/7-3-round-numbers-glow-n-show-2\/\" rel=\"attachment wp-att-18421\"><img loading=\"lazy\" class=\"alignnone wp-image-18421 size-full\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2020\/12\/7.3-round-numbers-glow-n-show-1.png\" alt=\"\" width=\"548\" height=\"140\" srcset=\"https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2020\/12\/7.3-round-numbers-glow-n-show-1.png 548w, https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2020\/12\/7.3-round-numbers-glow-n-show-1-300x77.png 300w\" sizes=\"(max-width: 548px) 100vw, 548px\" \/><\/a><br \/>\n85 lies in between 80 and 90.<br \/>\n85 is the half way of 80 and 90.<br \/>\nSo,Nearest Ten of 85 is 90.<\/p>\n<p>Question 3.<br \/>\n153 _____<\/p>\n<p>Answer:<\/p>\n<p><a href=\"https:\/\/ccssmathanswers.com\/big-ideas-math-answers-grade-3-chapter-7\/7-3-round-numbers-glow-n-show-3\/\" rel=\"attachment wp-att-18422\"><img loading=\"lazy\" class=\"alignnone wp-image-18422 size-full\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2020\/12\/7.3-round-numbers-glow-n-show-2.png\" alt=\"\" width=\"567\" height=\"102\" srcset=\"https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2020\/12\/7.3-round-numbers-glow-n-show-2.png 567w, https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2020\/12\/7.3-round-numbers-glow-n-show-2-300x54.png 300w\" sizes=\"(max-width: 567px) 100vw, 567px\" \/><\/a><br \/>\n153 lies in between 150 and 160.<br \/>\nNearest Ten of 153: 150.<br \/>\n<strong>Round the number to the nearest hundred.<\/strong><\/p>\n<p>Question 4.<br \/>\n749 _____<\/p>\n<p>Answer:<\/p>\n<p><a href=\"https:\/\/ccssmathanswers.com\/big-ideas-math-answers-grade-3-chapter-7\/7-3-round-numbers-glow-n-show-4\/\" rel=\"attachment wp-att-18423\"><img loading=\"lazy\" class=\"alignnone wp-image-18423 size-full\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2020\/12\/7.3-round-numbers-glow-n-show-3.png\" alt=\"\" width=\"559\" height=\"146\" srcset=\"https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2020\/12\/7.3-round-numbers-glow-n-show-3.png 559w, https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2020\/12\/7.3-round-numbers-glow-n-show-3-300x78.png 300w\" sizes=\"(max-width: 559px) 100vw, 559px\" \/><\/a><br \/>\n749 lies between 700 and 800.<br \/>\nNearest hundred of 749 is 700.<\/p>\n<p>Question 5.<br \/>\n372 ______<\/p>\n<p>Answer:<br \/>\n<a href=\"https:\/\/ccssmathanswers.com\/big-ideas-math-answers-grade-3-chapter-7\/7-3-round-numbers-glow-n-show-5\/\" rel=\"attachment wp-att-18424\"><img loading=\"lazy\" class=\"alignnone wp-image-18424 size-full\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2020\/12\/7.3-round-numbers-glow-n-show-4.png\" alt=\"\" width=\"555\" height=\"128\" srcset=\"https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2020\/12\/7.3-round-numbers-glow-n-show-4.png 555w, https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2020\/12\/7.3-round-numbers-glow-n-show-4-300x69.png 300w\" sizes=\"(max-width: 555px) 100vw, 555px\" \/><\/a><br \/>\n372 lies in between 300 and 400.<br \/>\nNearest Hundred of 372 is 400.<\/p>\n<p>Question 6.<br \/>\n94 _____<\/p>\n<p>Answer:<br \/>\n<a href=\"https:\/\/ccssmathanswers.com\/big-ideas-math-answers-grade-3-chapter-7\/7-3-round-numbers-glow-n-show-6\/\" rel=\"attachment wp-att-18425\"><img loading=\"lazy\" class=\"alignnone wp-image-18425 size-full\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2020\/12\/7.3-round-numbers-glow-n-show-5.png\" alt=\"\" width=\"539\" height=\"110\" srcset=\"https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2020\/12\/7.3-round-numbers-glow-n-show-5.png 539w, https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2020\/12\/7.3-round-numbers-glow-n-show-5-300x61.png 300w\" sizes=\"(max-width: 539px) 100vw, 539px\" \/><\/a><br \/>\n94 lies in between 0 and 100.<br \/>\nThe nearest Hundred of 94 is 100.<\/p>\n<p><strong>Apply and Grow: Practice<\/strong><br \/>\n<strong>Round the number to the nearest ten.<\/strong><\/p>\n<p>Question 7.<br \/>\n17 ____<\/p>\n<p>Answer:<br \/>\n<a href=\"https:\/\/ccssmathanswers.com\/big-ideas-math-answers-grade-3-chapter-7\/7-3-apply-n-grow\/\" rel=\"attachment wp-att-18426\"><img loading=\"lazy\" class=\"alignnone wp-image-18426 size-full\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2020\/12\/7.3-apply-n-grow.png\" alt=\"\" width=\"564\" height=\"110\" srcset=\"https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2020\/12\/7.3-apply-n-grow.png 564w, https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2020\/12\/7.3-apply-n-grow-300x59.png 300w\" sizes=\"(max-width: 564px) 100vw, 564px\" \/><\/a><br \/>\n17 lies in between 10 and 20.<br \/>\nSo, the Nearest Ten of 17 is 20.<\/p>\n<p>Question 8.<br \/>\n52 _____<\/p>\n<p>Answer:<br \/>\n<a href=\"https:\/\/ccssmathanswers.com\/big-ideas-math-answers-grade-3-chapter-7\/7-3-round-number-apply-n-grow\/\" rel=\"attachment wp-att-18441\"><img loading=\"lazy\" class=\"alignnone size-full wp-image-18441\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2020\/12\/7.3-round-number-apply-n-grow.png\" alt=\"\" width=\"543\" height=\"99\" srcset=\"https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2020\/12\/7.3-round-number-apply-n-grow.png 543w, https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2020\/12\/7.3-round-number-apply-n-grow-300x55.png 300w\" sizes=\"(max-width: 543px) 100vw, 543px\" \/><\/a><br \/>\n52 lies in between 50 and 60.<br \/>\nSo, Nearest Ten of 52 is 50.<\/p>\n<p>Question 9.<br \/>\n79 _____<\/p>\n<p>Answer:<br \/>\n<a href=\"https:\/\/ccssmathanswers.com\/big-ideas-math-answers-grade-3-chapter-7\/7-3-round-number-apply-n-grow-2\/\" rel=\"attachment wp-att-18442\"><img loading=\"lazy\" class=\"alignnone size-full wp-image-18442\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2020\/12\/7.3-round-number-apply-n-grow-1.png\" alt=\"\" width=\"557\" height=\"120\" srcset=\"https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2020\/12\/7.3-round-number-apply-n-grow-1.png 557w, https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2020\/12\/7.3-round-number-apply-n-grow-1-300x65.png 300w\" sizes=\"(max-width: 557px) 100vw, 557px\" \/><\/a><br \/>\n79 lies in between 70 and 80.<br \/>\nSo, Nearest Ten of 79 is 80.<\/p>\n<p>Question 10.<br \/>\n673 _____<\/p>\n<p>Answer:<br \/>\n<a href=\"https:\/\/ccssmathanswers.com\/big-ideas-math-answers-grade-3-chapter-7\/7-3-round-number-apply-n-grow-3\/\" rel=\"attachment wp-att-18444\"><img loading=\"lazy\" class=\"alignnone size-full wp-image-18444\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2020\/12\/7.3-round-number-apply-n-grow-2.png\" alt=\"\" width=\"555\" height=\"99\" srcset=\"https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2020\/12\/7.3-round-number-apply-n-grow-2.png 555w, https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2020\/12\/7.3-round-number-apply-n-grow-2-300x54.png 300w\" sizes=\"(max-width: 555px) 100vw, 555px\" \/><\/a><br \/>\n673 lies in between 670 and 680.<br \/>\nSo, Nearest Ten of 673 is 670.<\/p>\n<p>Question 11.<br \/>\n521 ____<\/p>\n<p>Answer:<br \/>\n<a href=\"https:\/\/ccssmathanswers.com\/big-ideas-math-answers-grade-3-chapter-7\/7-3-round-number-apply-n-grow-5\/\" rel=\"attachment wp-att-18446\"><img loading=\"lazy\" class=\"alignnone size-full wp-image-18446\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2020\/12\/7.3-round-number-apply-n-grow-4.png\" alt=\"\" width=\"572\" height=\"117\" srcset=\"https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2020\/12\/7.3-round-number-apply-n-grow-4.png 572w, https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2020\/12\/7.3-round-number-apply-n-grow-4-300x61.png 300w\" sizes=\"(max-width: 572px) 100vw, 572px\" \/><\/a><br \/>\n521 lies in between 520 and 530.<br \/>\nSo, Nearest Ten of 521 of 520.<\/p>\n<p>Question 12.<br \/>\n208 ___<\/p>\n<p>Answer:<\/p>\n<p><a href=\"https:\/\/ccssmathanswers.com\/big-ideas-math-answers-grade-3-chapter-7\/7-3-round-number-apply-n-grow-6\/\" rel=\"attachment wp-att-18447\"><img loading=\"lazy\" class=\"alignnone size-full wp-image-18447\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2020\/12\/7.3-round-number-apply-n-grow-5.png\" alt=\"\" width=\"556\" height=\"117\" srcset=\"https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2020\/12\/7.3-round-number-apply-n-grow-5.png 556w, https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2020\/12\/7.3-round-number-apply-n-grow-5-300x63.png 300w\" sizes=\"(max-width: 556px) 100vw, 556px\" \/><\/a><br \/>\n208 lies in between 200 and 210.<br \/>\nSo, Nearest Ten of 208 is 210.<br \/>\n<strong>Round the number to the nearest hundred.<\/strong><\/p>\n<p>Question 13.<br \/>\n161 ____<\/p>\n<p>Answer:<br \/>\n<a href=\"https:\/\/ccssmathanswers.com\/big-ideas-math-answers-grade-3-chapter-7\/7-3-round-number-apply-n-grow-7\/\" rel=\"attachment wp-att-18448\"><img loading=\"lazy\" class=\"alignnone size-full wp-image-18448\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2020\/12\/7.3-round-number-apply-n-grow-6.png\" alt=\"\" width=\"557\" height=\"132\" srcset=\"https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2020\/12\/7.3-round-number-apply-n-grow-6.png 557w, https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2020\/12\/7.3-round-number-apply-n-grow-6-300x71.png 300w\" sizes=\"(max-width: 557px) 100vw, 557px\" \/><\/a><br \/>\n161 lies in between 100 and 200.<br \/>\nSo, the Nearest Hundred of 161 is 200.<\/p>\n<p>Question 14.<br \/>\n738 _____<\/p>\n<p>Answer:<\/p>\n<p><a href=\"https:\/\/ccssmathanswers.com\/big-ideas-math-answers-grade-3-chapter-7\/7-3-round-number-apply-n-grow-8\/\" rel=\"attachment wp-att-18449\"><img loading=\"lazy\" class=\"alignnone size-full wp-image-18449\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2020\/12\/7.3-round-number-apply-n-grow-7.png\" alt=\"\" width=\"556\" height=\"114\" srcset=\"https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2020\/12\/7.3-round-number-apply-n-grow-7.png 556w, https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2020\/12\/7.3-round-number-apply-n-grow-7-300x62.png 300w\" sizes=\"(max-width: 556px) 100vw, 556px\" \/><\/a><br \/>\n738 lies in between 700 and 800.<br \/>\nSo, the Nearest Hundred of 738 is 700.<\/p>\n<p>Question 15.<br \/>\n504 ____<\/p>\n<p>Answer:<br \/>\n<a href=\"https:\/\/ccssmathanswers.com\/big-ideas-math-answers-grade-3-chapter-7\/7-3-round-number-apply-n-grow-9\/\" rel=\"attachment wp-att-18450\"><img loading=\"lazy\" class=\"alignnone size-full wp-image-18450\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2020\/12\/7.3-round-number-apply-n-grow-8.png\" alt=\"\" width=\"541\" height=\"104\" srcset=\"https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2020\/12\/7.3-round-number-apply-n-grow-8.png 541w, https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2020\/12\/7.3-round-number-apply-n-grow-8-300x58.png 300w\" sizes=\"(max-width: 541px) 100vw, 541px\" \/><\/a><br \/>\n504 lies in between 500 and 600.<br \/>\nSo, Nearest Hundred of 504 is 500.<\/p>\n<p>Question 16.<br \/>\n50 ____<\/p>\n<p>Answer:<br \/>\n<a href=\"https:\/\/ccssmathanswers.com\/big-ideas-math-answers-grade-3-chapter-7\/7-3-round-number-apply-n-grow-10\/\" rel=\"attachment wp-att-18451\"><img loading=\"lazy\" class=\"alignnone size-full wp-image-18451\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2020\/12\/7.3-round-number-apply-n-grow-9.png\" alt=\"\" width=\"567\" height=\"125\" srcset=\"https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2020\/12\/7.3-round-number-apply-n-grow-9.png 567w, https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2020\/12\/7.3-round-number-apply-n-grow-9-300x66.png 300w\" sizes=\"(max-width: 567px) 100vw, 567px\" \/><\/a><br \/>\n50 lies in between 0 and 100.<br \/>\nSo, Nearest Hundred of 50 is 100.<\/p>\n<p>Question 17.<br \/>\n22 ____<\/p>\n<p>Answer:<br \/>\n<a href=\"https:\/\/ccssmathanswers.com\/big-ideas-math-answers-grade-3-chapter-7\/7-3-round-number-apply-n-grow-11\/\" rel=\"attachment wp-att-18452\"><img loading=\"lazy\" class=\"alignnone size-full wp-image-18452\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2020\/12\/7.3-round-number-apply-n-grow-10.png\" alt=\"\" width=\"542\" height=\"113\" srcset=\"https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2020\/12\/7.3-round-number-apply-n-grow-10.png 542w, https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2020\/12\/7.3-round-number-apply-n-grow-10-300x63.png 300w\" sizes=\"(max-width: 542px) 100vw, 542px\" \/><\/a><br \/>\n22 lies in between 0 and 100.<br \/>\nSo, Nearest Hundred of 22 is 0.<\/p>\n<p>Question 18.<br \/>\n999 _____<\/p>\n<p>Answer:<\/p>\n<p><a href=\"https:\/\/ccssmathanswers.com\/big-ideas-math-answers-grade-3-chapter-7\/7-3-round-number-apply-n-grow-12\/\" rel=\"attachment wp-att-18453\"><img loading=\"lazy\" class=\"alignnone size-full wp-image-18453\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2020\/12\/7.3-round-number-apply-n-grow-11.png\" alt=\"\" width=\"591\" height=\"128\" srcset=\"https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2020\/12\/7.3-round-number-apply-n-grow-11.png 591w, https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2020\/12\/7.3-round-number-apply-n-grow-11-300x65.png 300w\" sizes=\"(max-width: 591px) 100vw, 591px\" \/><\/a><br \/>\n999 lies in between 900 and 1000.<br \/>\nSo, the Nearest Hundred of 999 is 1000.<\/p>\n<p><strong>Round the number to the nearest ten to the nearest hundred.<\/strong><\/p>\n<p>Question 19.<br \/>\n836<br \/>\nNearest ten: ______<br \/>\nNearest hundred: ____<\/p>\n<p>Answer:<br \/>\n<a href=\"https:\/\/ccssmathanswers.com\/big-ideas-math-answers-grade-3-chapter-7\/7-3-round-number-apply-n-grow-13\/\" rel=\"attachment wp-att-18454\"><img loading=\"lazy\" class=\"alignnone size-full wp-image-18454\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2020\/12\/7.3-round-number-apply-n-grow-12.png\" alt=\"\" width=\"563\" height=\"125\" srcset=\"https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2020\/12\/7.3-round-number-apply-n-grow-12.png 563w, https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2020\/12\/7.3-round-number-apply-n-grow-12-300x67.png 300w\" sizes=\"(max-width: 563px) 100vw, 563px\" \/><\/a><br \/>\nThe nearest Ten of\u00a0 836 is 840.<\/p>\n<p><a href=\"https:\/\/ccssmathanswers.com\/big-ideas-math-answers-grade-3-chapter-7\/7-3-round-number-apply-n-grow-14\/\" rel=\"attachment wp-att-18455\"><img loading=\"lazy\" class=\"alignnone size-full wp-image-18455\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2020\/12\/7.3-round-number-apply-n-grow-13.png\" alt=\"\" width=\"538\" height=\"118\" srcset=\"https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2020\/12\/7.3-round-number-apply-n-grow-13.png 538w, https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2020\/12\/7.3-round-number-apply-n-grow-13-300x66.png 300w\" sizes=\"(max-width: 538px) 100vw, 538px\" \/><\/a><br \/>\nThe nearest Hundred of 836 is 800.<\/p>\n<p>Question 20.<br \/>\n945<br \/>\nNearest ten: ______<br \/>\nNearest hundred: ____<\/p>\n<p>Answer:<br \/>\n<a href=\"https:\/\/ccssmathanswers.com\/big-ideas-math-answers-grade-3-chapter-7\/7-3-round-number-apply-n-grow-15\/\" rel=\"attachment wp-att-18456\"><img loading=\"lazy\" class=\"alignnone size-full wp-image-18456\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2020\/12\/7.3-round-number-apply-n-grow-14.png\" alt=\"\" width=\"541\" height=\"100\" srcset=\"https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2020\/12\/7.3-round-number-apply-n-grow-14.png 541w, https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2020\/12\/7.3-round-number-apply-n-grow-14-300x55.png 300w\" sizes=\"(max-width: 541px) 100vw, 541px\" \/><\/a><\/p>\n<p>Nearest Ten of 945 is 950.<\/p>\n<p><a href=\"https:\/\/ccssmathanswers.com\/big-ideas-math-answers-grade-3-chapter-7\/7-3-round-number-apply-n-grow-17\/\" rel=\"attachment wp-att-18459\"><img loading=\"lazy\" class=\"alignnone size-full wp-image-18459\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2020\/12\/7.3-round-number-apply-n-grow-16.png\" alt=\"\" width=\"557\" height=\"155\" srcset=\"https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2020\/12\/7.3-round-number-apply-n-grow-16.png 557w, https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2020\/12\/7.3-round-number-apply-n-grow-16-300x83.png 300w\" sizes=\"(max-width: 557px) 100vw, 557px\" \/><\/a><br \/>\nNearest Hundred of 945 is 900.<\/p>\n<p>Question 21.<br \/>\n72<br \/>\nNearest ten: ______<br \/>\nNearest hundred: ____<\/p>\n<p>Answer:<\/p>\n<p><a href=\"https:\/\/ccssmathanswers.com\/big-ideas-math-answers-grade-3-chapter-7\/7-3-round-number-apply-n-grow-18\/\" rel=\"attachment wp-att-18460\"><img loading=\"lazy\" class=\"alignnone size-full wp-image-18460\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2020\/12\/7.3-round-number-apply-n-grow-17.png\" alt=\"\" width=\"558\" height=\"105\" srcset=\"https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2020\/12\/7.3-round-number-apply-n-grow-17.png 558w, https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2020\/12\/7.3-round-number-apply-n-grow-17-300x56.png 300w\" sizes=\"(max-width: 558px) 100vw, 558px\" \/><\/a><br \/>\nNearest Ten of\u00a0 72 is 70.<\/p>\n<p><a href=\"https:\/\/ccssmathanswers.com\/big-ideas-math-answers-grade-3-chapter-7\/7-3-round-number-apply-n-grow-19\/\" rel=\"attachment wp-att-18461\"><img loading=\"lazy\" class=\"alignnone size-full wp-image-18461\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2020\/12\/7.3-round-number-apply-n-grow-18.png\" alt=\"\" width=\"569\" height=\"124\" srcset=\"https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2020\/12\/7.3-round-number-apply-n-grow-18.png 569w, https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2020\/12\/7.3-round-number-apply-n-grow-18-300x65.png 300w\" sizes=\"(max-width: 569px) 100vw, 569px\" \/><\/a><br \/>\nNearest Hundred of 72 is 100.<\/p>\n<p>Question 22.<br \/>\n<strong>Number Sense<\/strong><br \/>\nNewton rounds 587 to 590. To what place does he round?<\/p>\n<p>Answer:<br \/>\nNewton rounds 587 to 590.<br \/>\n<a href=\"https:\/\/ccssmathanswers.com\/big-ideas-math-answers-grade-3-chapter-7\/7-3-22ans-2\/\" rel=\"attachment wp-att-17152\"><img loading=\"lazy\" class=\"alignnone size-full wp-image-17152\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2020\/12\/7.3-22ans.jpg\" alt=\"\" width=\"243\" height=\"202\" \/><\/a><br \/>\nNewton rounds 587 to its Nearest ten-value 590.<\/p>\n<p>Question 23.<br \/>\n<strong>Number Sense<\/strong><br \/>\nWhich numbers round to 400 when rounded to the nearest hundred?<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-10668\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2020\/12\/Big-Ideas-Math-Answers-Grade-3-Chapter-7-Round-and-Estimate-Numbers-7.3-4.png\" alt=\"Big Ideas Math Answers Grade 3 Chapter 7 Round and Estimate Numbers 7.3 4\" width=\"303\" height=\"76\" srcset=\"https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2020\/12\/Big-Ideas-Math-Answers-Grade-3-Chapter-7-Round-and-Estimate-Numbers-7.3-4.png 303w, https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2020\/12\/Big-Ideas-Math-Answers-Grade-3-Chapter-7-Round-and-Estimate-Numbers-7.3-4-300x75.png 300w\" sizes=\"(max-width: 303px) 100vw, 303px\" \/><\/p>\n<p>Answer:<br \/>\n<a href=\"https:\/\/ccssmathanswers.com\/big-ideas-math-answers-grade-3-chapter-7\/7-3-ans-23\/\" rel=\"attachment wp-att-17252\"><img loading=\"lazy\" class=\"alignnone size-full wp-image-17252\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2020\/12\/7.3-ans-23.png\" alt=\"\" width=\"227\" height=\"182\" \/><\/a><a href=\"https:\/\/ccssmathanswers.com\/big-ideas-math-answers-grade-3-chapter-7\/7-3-23a-ans\/\" rel=\"attachment wp-att-17253\"><img loading=\"lazy\" class=\"alignnone size-full wp-image-17253\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2020\/12\/7.3-23a-ans.png\" alt=\"\" width=\"235\" height=\"192\" \/><\/a><br \/>\n<a href=\"https:\/\/ccssmathanswers.com\/big-ideas-math-answers-grade-3-chapter-7\/7-3-23b-ans\/\" rel=\"attachment wp-att-17254\"><img loading=\"lazy\" class=\"alignnone size-full wp-image-17254\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2020\/12\/7.3-23b-ans.jpg\" alt=\"\" width=\"230\" height=\"193\" \/><\/a><a href=\"https:\/\/ccssmathanswers.com\/big-ideas-math-answers-grade-3-chapter-7\/7-3-23c-ans\/\" rel=\"attachment wp-att-17255\"><img loading=\"lazy\" class=\"alignnone size-full wp-image-17255\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2020\/12\/7.3-23c-ans.png\" alt=\"\" width=\"234\" height=\"203\" \/><\/a><br \/>\nNumbers rounded to 400 when rounded to the nearest hundreds are 356 and 437.<br \/>\n<strong>Think and Grow: Modeling Real Life<\/strong><br \/>\nOn which day do about 800 people attend the concert? Explain.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-10669\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2020\/12\/Big-Ideas-Math-Answers-Grade-3-Chapter-7-Round-and-Estimate-Numbers-7.3-5.png\" alt=\"Big Ideas Math Answers Grade 3 Chapter 7 Round and Estimate Numbers 7.3 5\" width=\"285\" height=\"245\" \/><br \/>\nAbout 800 people attend the concert on ______<br \/>\nExplain:<br \/>\nAbout 800 people attend the concert on all the days because in all the days people count is about n above 800.<\/p>\n<p><strong>Show and Grow<\/strong><\/p>\n<p>Question 24.<br \/>\nUse the table above to find on which days about 940 people attend the concert. Explain.<\/p>\n<p>Answer:<br \/>\nAbout\u00a0 940 people attend the concert on Friday and Sunday because in these days the people count is about n above 940.<br \/>\n<strong>DIG DEEPER!<\/strong><br \/>\nRound the time to the nearest ten minutes.<\/p>\n<p>Question 25.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-10670\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2020\/12\/Big-Ideas-Math-Answers-Grade-3-Chapter-7-Round-and-Estimate-Numbers-7.3-6.png\" alt=\"Big Ideas Math Answers Grade 3 Chapter 7 Round and Estimate Numbers 7.3 6\" width=\"145\" height=\"162\" \/><\/p>\n<p>Answer:<br \/>\nThe nearest Ten minutes of 7:23 is 7:20.<\/p>\n<p>Question 26.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-10671\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2020\/12\/Big-Ideas-Math-Answers-Grade-3-Chapter-7-Round-and-Estimate-Numbers-7.3-7.png\" alt=\"Big Ideas Math Answers Grade 3 Chapter 7 Round and Estimate Numbers 7.3 7\" width=\"156\" height=\"175\" \/><\/p>\n<p>Answer:<br \/>\nThe nearest Ten minutes of 3:05 is 3:10.<\/p>\n<p>Question 27.<br \/>\nExplain how using place value to round is similar to using a number line to round.<\/p>\n<p>Answer:<br \/>\nIn math, every digit in a number has a place value.<br \/>\nPlace value can be defined as the value represented by a digit in a number on the basis of its position in the number.<br \/>\nA\u00a0<b>number line<\/b>\u00a0is a line on which numbers are placed in intervals, to show basic numerical calculations.<br \/>\nUsing place value to round is similar to using a number line to round is <strong>THE<\/strong> <strong>SAME.<\/strong> If we\u2019re rounding the number 111 to the nearest ten, it\u2019s between 110 and 120 on the number line, and it\u2019s closer to 110. Furthermore, the process is the same when we\u2019re rounding to the nearest hundred\u2013only now we\u2019re asking which two multiples of 100 the number falls between.<\/p>\n<h3><a id=\"Round_Numbers_Using_a_Place_Value_Homework_&amp;_Practice_7.3\"><\/a>Round Numbers Using a Place Value Homework &amp; Practice 7.3<\/h3>\n<p><strong>Round the number to the nearest ten<\/strong><\/p>\n<p>Question 1.<br \/>\n29 _____<\/p>\n<p>Answer:<br \/>\n<a href=\"https:\/\/ccssmathanswers.com\/?attachment_id=18464\" rel=\"attachment wp-att-18464\"><img loading=\"lazy\" class=\"alignnone size-full wp-image-18464\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2020\/12\/7.3-round-number-apply-n-grow-21.png\" alt=\"\" width=\"531\" height=\"113\" srcset=\"https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2020\/12\/7.3-round-number-apply-n-grow-21.png 531w, https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2020\/12\/7.3-round-number-apply-n-grow-21-300x64.png 300w\" sizes=\"(max-width: 531px) 100vw, 531px\" \/><\/a><br \/>\nNearest Ten of 29 is 30.<\/p>\n<p>Question 2.<br \/>\n564 _____<\/p>\n<p>Answer:<br \/>\n<a href=\"https:\/\/ccssmathanswers.com\/big-ideas-math-answers-grade-3-chapter-7\/7-3-round-number-apply-n-grow-24\/\" rel=\"attachment wp-att-18466\"><img loading=\"lazy\" class=\"alignnone size-full wp-image-18466\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2020\/12\/7.3-round-number-apply-n-grow-23.png\" alt=\"\" width=\"545\" height=\"107\" srcset=\"https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2020\/12\/7.3-round-number-apply-n-grow-23.png 545w, https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2020\/12\/7.3-round-number-apply-n-grow-23-300x59.png 300w\" sizes=\"(max-width: 545px) 100vw, 545px\" \/><\/a><br \/>\nNearest Ten of 564 is 560.<\/p>\n<p>Question 3.<br \/>\n843 ____<\/p>\n<p>Answer:<br \/>\n<a href=\"https:\/\/ccssmathanswers.com\/big-ideas-math-answers-grade-3-chapter-7\/7-3-round-number-apply-n-grow-25\/\" rel=\"attachment wp-att-18467\"><img loading=\"lazy\" class=\"alignnone size-full wp-image-18467\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2020\/12\/7.3-round-number-apply-n-grow-24.png\" alt=\"\" width=\"544\" height=\"103\" srcset=\"https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2020\/12\/7.3-round-number-apply-n-grow-24.png 544w, https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2020\/12\/7.3-round-number-apply-n-grow-24-300x57.png 300w\" sizes=\"(max-width: 544px) 100vw, 544px\" \/><\/a><br \/>\nNearest Ten of 843 is 840.<br \/>\n<strong>Round the number to the nearest hundred<\/strong><\/p>\n<p>Question 4.<br \/>\n281 ____<\/p>\n<p>Answer:<\/p>\n<p><a href=\"https:\/\/ccssmathanswers.com\/big-ideas-math-answers-grade-3-chapter-7\/7-3-round-number-apply-n-grow-26\/\" rel=\"attachment wp-att-18469\"><img loading=\"lazy\" class=\"alignnone size-full wp-image-18469\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2020\/12\/7.3-round-number-apply-n-grow-25.png\" alt=\"\" width=\"532\" height=\"102\" srcset=\"https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2020\/12\/7.3-round-number-apply-n-grow-25.png 532w, https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2020\/12\/7.3-round-number-apply-n-grow-25-300x58.png 300w\" sizes=\"(max-width: 532px) 100vw, 532px\" \/><\/a><br \/>\nThe nearest Hundred of 281 is 300.<\/p>\n<p>Question 5.<br \/>\n36 ____<\/p>\n<p>Answer:<\/p>\n<p><a href=\"https:\/\/ccssmathanswers.com\/big-ideas-math-answers-grade-3-chapter-7\/7-3-round-number-apply-n-grow-27\/\" rel=\"attachment wp-att-18471\"><img loading=\"lazy\" class=\"alignnone size-full wp-image-18471\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2020\/12\/7.3-round-number-apply-n-grow-26.png\" alt=\"\" width=\"563\" height=\"90\" srcset=\"https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2020\/12\/7.3-round-number-apply-n-grow-26.png 563w, https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2020\/12\/7.3-round-number-apply-n-grow-26-300x48.png 300w\" sizes=\"(max-width: 563px) 100vw, 563px\" \/><\/a><br \/>\nThe nearest Hundred of 36 is 0.<\/p>\n<p>Question 6.<br \/>\n975 ____<\/p>\n<p>Answer:<\/p>\n<p><a href=\"https:\/\/ccssmathanswers.com\/big-ideas-math-answers-grade-3-chapter-7\/7-3-round-number-apply-n-grow-28\/\" rel=\"attachment wp-att-18472\"><img loading=\"lazy\" class=\"alignnone size-full wp-image-18472\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2020\/12\/7.3-round-number-apply-n-grow-27.png\" alt=\"\" width=\"528\" height=\"101\" srcset=\"https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2020\/12\/7.3-round-number-apply-n-grow-27.png 528w, https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2020\/12\/7.3-round-number-apply-n-grow-27-300x57.png 300w\" sizes=\"(max-width: 528px) 100vw, 528px\" \/><\/a><br \/>\nThe nearest Hundred of 975 is 1000.<br \/>\n<strong>Round the number to the nearest ten to the nearest hundred.<\/strong><\/p>\n<p>Question 7.<br \/>\n152<br \/>\nNearest ten: ______<br \/>\nNearest hundred: ____<\/p>\n<p>Answer:<\/p>\n<p><a href=\"https:\/\/ccssmathanswers.com\/big-ideas-math-answers-grade-3-chapter-7\/7-3-round-number-apply-n-grow-29\/\" rel=\"attachment wp-att-18473\"><img loading=\"lazy\" class=\"alignnone size-full wp-image-18473\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2020\/12\/7.3-round-number-apply-n-grow-28.png\" alt=\"\" width=\"561\" height=\"90\" srcset=\"https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2020\/12\/7.3-round-number-apply-n-grow-28.png 561w, https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2020\/12\/7.3-round-number-apply-n-grow-28-300x48.png 300w\" sizes=\"(max-width: 561px) 100vw, 561px\" \/><\/a><br \/>\nNearest Ten of 152 is 150.<\/p>\n<p><a href=\"https:\/\/ccssmathanswers.com\/big-ideas-math-answers-grade-3-chapter-7\/7-3-round-number-apply-n-grow-30\/\" rel=\"attachment wp-att-18474\"><img loading=\"lazy\" class=\"alignnone size-full wp-image-18474\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2020\/12\/7.3-round-number-apply-n-grow-29.png\" alt=\"\" width=\"535\" height=\"108\" srcset=\"https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2020\/12\/7.3-round-number-apply-n-grow-29.png 535w, https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2020\/12\/7.3-round-number-apply-n-grow-29-300x61.png 300w\" sizes=\"(max-width: 535px) 100vw, 535px\" \/><\/a><br \/>\nNearest Hundred of 152 is 200.<\/p>\n<p>Question 8.<br \/>\n308<br \/>\nNearest ten:<br \/>\nNearest hundred: ____<\/p>\n<p>Answer:<br \/>\n<a href=\"https:\/\/ccssmathanswers.com\/big-ideas-math-answers-grade-3-chapter-7\/7-3-round-number-apply-n-grow-31\/\" rel=\"attachment wp-att-18475\"><img loading=\"lazy\" class=\"alignnone size-full wp-image-18475\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2020\/12\/7.3-round-number-apply-n-grow-30.png\" alt=\"\" width=\"569\" height=\"114\" srcset=\"https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2020\/12\/7.3-round-number-apply-n-grow-30.png 569w, https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2020\/12\/7.3-round-number-apply-n-grow-30-300x60.png 300w\" sizes=\"(max-width: 569px) 100vw, 569px\" \/><\/a><br \/>\nThe nearest ten of 308 is 310.<\/p>\n<p><a href=\"https:\/\/ccssmathanswers.com\/big-ideas-math-answers-grade-3-chapter-7\/7-3-round-number-apply-n-grow-32\/\" rel=\"attachment wp-att-18476\"><img loading=\"lazy\" class=\"alignnone size-full wp-image-18476\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2020\/12\/7.3-round-number-apply-n-grow-31.png\" alt=\"\" width=\"511\" height=\"120\" srcset=\"https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2020\/12\/7.3-round-number-apply-n-grow-31.png 511w, https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2020\/12\/7.3-round-number-apply-n-grow-31-300x70.png 300w\" sizes=\"(max-width: 511px) 100vw, 511px\" \/><\/a><br \/>\nThe nearest hundred of 308 is 300.<\/p>\n<p>Question 9.<br \/>\n45<br \/>\nNearest ten: ______<br \/>\nNearest hundred: ____<\/p>\n<p>Answer:<\/p>\n<p><a href=\"https:\/\/ccssmathanswers.com\/big-ideas-math-answers-grade-3-chapter-7\/7-3-round-number-apply-n-grow-33\/\" rel=\"attachment wp-att-18477\"><img loading=\"lazy\" class=\"alignnone size-full wp-image-18477\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2020\/12\/7.3-round-number-apply-n-grow-32.png\" alt=\"\" width=\"542\" height=\"113\" srcset=\"https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2020\/12\/7.3-round-number-apply-n-grow-32.png 542w, https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2020\/12\/7.3-round-number-apply-n-grow-32-300x63.png 300w\" sizes=\"(max-width: 542px) 100vw, 542px\" \/><\/a><br \/>\nNearest Ten of 45 is 50.<\/p>\n<p><a href=\"https:\/\/ccssmathanswers.com\/big-ideas-math-answers-grade-3-chapter-7\/7-3-round-number-apply-n-grow-34\/\" rel=\"attachment wp-att-18478\"><img loading=\"lazy\" class=\"alignnone size-full wp-image-18478\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2020\/12\/7.3-round-number-apply-n-grow-33.png\" alt=\"\" width=\"544\" height=\"90\" srcset=\"https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2020\/12\/7.3-round-number-apply-n-grow-33.png 544w, https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2020\/12\/7.3-round-number-apply-n-grow-33-300x50.png 300w\" sizes=\"(max-width: 544px) 100vw, 544px\" \/><\/a><br \/>\nThe nearest Hundred of 45 is 0.<\/p>\n<p>Question 10.<br \/>\nWhat is the least number that rounds to 20 when rounded to the nearest ten? What is the greatest number?<br \/>\nLeast: ____<br \/>\nGreatest: ____<\/p>\n<p>Answer:<br \/>\n<a href=\"https:\/\/ccssmathanswers.com\/big-ideas-math-answers-grade-3-chapter-7\/7-3-h-m-10ans-2\/\" rel=\"attachment wp-att-17263\"><img loading=\"lazy\" class=\"alignnone size-full wp-image-17263\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2020\/12\/7.3-H-M-10ANS-1.jpg\" alt=\"\" width=\"176\" height=\"193\" \/><\/a><br \/>\nThe least number that rounds to 20 when rounded to the Nearest Ten is 15.<br \/>\n<a href=\"https:\/\/ccssmathanswers.com\/big-ideas-math-answers-grade-3-chapter-7\/7-3-hm-10ans\/\" rel=\"attachment wp-att-17264\"><img loading=\"lazy\" class=\"alignnone size-full wp-image-17264\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2020\/12\/7.3-HM-10ans.jpg\" alt=\"\" width=\"191\" height=\"206\" \/><\/a><br \/>\nThe greatest number that rounds to 20 when rounded to the Nearest Ten is 24.<\/p>\n<p>Question 11.<br \/>\n<strong>DIG DEEPER!<\/strong><br \/>\nNumber Sense A three-digit number has the digits 3, 5, and 6.It rounds to 700 when rounded to the nearest hundred. What is the number? Explain.<\/p>\n<p>Answer:<br \/>\nGiven: Three digit number digits are 3,5 and 6.<br \/>\nThree digit number rounded to 700 is 653 because in given numbers Hundred place has to be 6 as it has to be rounded to 700.<br \/>\nTens place has to be equal to 5 or greater than 5, 5 taken for tens place.<br \/>\nOnes place is left out digit that is 3.<br \/>\n<a href=\"https:\/\/ccssmathanswers.com\/big-ideas-math-answers-grade-3-chapter-7\/7-3-dd-11ans-3\/\" rel=\"attachment wp-att-17267\"><img loading=\"lazy\" class=\"alignnone size-full wp-image-17267\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2020\/12\/7.3-DD-11ANS-2.jpg\" alt=\"\" width=\"223\" height=\"179\" \/><\/a><br \/>\nThe number is 653.<\/p>\n<p>Question 12.<br \/>\n<strong>YOU BE THE TEACHER<\/strong><br \/>\nDescartes says that a number rounded to the nearest ten can be greater than the same number rounded to the nearest hundred. Is Descartes correct? Explain.<\/p>\n<p>Answer:<br \/>\nDescartes says that a number rounded to the Nearest Ten can be greater than the same number rounded to the Nearest Hundred is correct.<br \/>\nFor Example: Estimate the sum 1,472 + 398 + 772 + 164 by rounding each number to the nearest hundred.<\/p>\n<p style=\"font-weight: 400;\">1,472\u2026.1,500<\/p>\n<p style=\"font-weight: 400;\">398\u2026\u2026. 400<\/p>\n<p style=\"font-weight: 400;\">772\u2026\u2026..800<\/p>\n<p style=\"font-weight: 400;\">164\u2026\u2026..200<\/p>\n<p style=\"font-weight: 400;\">Total amount rounded to hundred:2900<\/p>\n<p>In the example above, the exact sum is 2,806. Note how close this is to the estimate, which is 94 greater.<br \/>\nEstimate the sum 1,472 + 398 + 772 + 164 by first rounding each number to the nearest ten.<\/p>\n<p style=\"font-weight: 400;\">1,472\u2026.1,470<\/p>\n<p style=\"font-weight: 400;\">398\u2026\u2026.. 400<\/p>\n<p style=\"font-weight: 400;\">772\u2026\u2026&#8230;770<\/p>\n<p style=\"font-weight: 400;\">164\u2026\u2026&#8230;160<\/p>\n<p style=\"font-weight: 400;\">Total amount rounded to tens place is 2,800.<\/p>\n<p style=\"font-weight: 400;\">Note that the estimate is 2,800, which is only 6 less than the actual sum of 2,806.<\/p>\n<p>Question 13.<br \/>\n<strong>Modeling Real Life<\/strong><br \/>\nOn which months are there about 450 people at the basketball courts? Explain<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-10672\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2020\/12\/Big-Ideas-Math-Answers-Grade-3-Chapter-7-Round-and-Estimate-Numbers-7.3-8.png\" alt=\"Big Ideas Math Answers Grade 3 Chapter 7 Round and Estimate Numbers 7.3 8\" width=\"295\" height=\"238\" \/><\/p>\n<p>Answer:<br \/>\nMonths about 450 people at the basketball courts are July and August because in these months only courts count is about and above 450.<\/p>\n<p><strong>DIG DEEPER!<\/strong><br \/>\nRound the time to the nearest ten minutes.<\/p>\n<p>Question 14.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-10673\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2020\/12\/Big-Ideas-Math-Answers-Grade-3-Chapter-7-Round-and-Estimate-Numbers-7.3-9.png\" alt=\"Big Ideas Math Answers Grade 3 Chapter 7 Round and Estimate Numbers 7.3 9\" width=\"272\" height=\"91\" \/><\/p>\n<p>Answer:<br \/>\nNearest Ten Minutes of 5:48 is 5:50.<\/p>\n<p>Question 15.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-10674\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2020\/12\/Big-Ideas-Math-Answers-Grade-3-Chapter-7-Round-and-Estimate-Numbers-7.3-10.png\" alt=\"Big Ideas Math Answers Grade 3 Chapter 7 Round and Estimate Numbers 7.3 10\" width=\"270\" height=\"134\" \/><\/p>\n<p>Answer:<br \/>\nNearest Ten Minutes of 2:35 is 2:40.<\/p>\n<p><strong>Review &amp; Refresh<\/strong><br \/>\n<strong>Find the product<\/strong><\/p>\n<p>Question 16.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-10675\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2020\/12\/Big-Ideas-Math-Answers-Grade-3-Chapter-7-Round-and-Estimate-Numbers-7.3-11.png\" alt=\"Big Ideas Math Answers Grade 3 Chapter 7 Round and Estimate Numbers 7.3 11\" width=\"66\" height=\"79\" \/><\/p>\n<p>Answer:<br \/>\n9 X 0=0.<\/p>\n<p>Question 17.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-10676\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2020\/12\/Big-Ideas-Math-Answers-Grade-3-Chapter-7-Round-and-Estimate-Numbers-7.3-12.png\" alt=\"Big Ideas Math Answers Grade 3 Chapter 7 Round and Estimate Numbers 7.3 12\" width=\"88\" height=\"88\" \/><\/p>\n<p>Answer:<br \/>\n10 X 9= 90.<\/p>\n<p>Question 18.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-10677\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2020\/12\/Big-Ideas-Math-Answers-Grade-3-Chapter-7-Round-and-Estimate-Numbers-7.3-13.png\" alt=\"Big Ideas Math Answers Grade 3 Chapter 7 Round and Estimate Numbers 7.3 13\" width=\"73\" height=\"84\" \/><\/p>\n<p>Answer:<br \/>\n9 X 3= 27.<\/p>\n<p>Question 19.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-10678\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2020\/12\/Big-Ideas-Math-Answers-Grade-3-Chapter-7-Round-and-Estimate-Numbers-7.3-14.png\" alt=\"Big Ideas Math Answers Grade 3 Chapter 7 Round and Estimate Numbers 7.3 14\" width=\"63\" height=\"97\" \/><\/p>\n<p>Answer:<br \/>\n6 X 9= 54.<\/p>\n<h3><a id=\"Lesson_7.4_Estimate_Sums\"><\/a>Lesson 7.4 Estimate Sums<\/h3>\n<p><strong>Explore and Grow<\/strong><br \/>\nRound each addend. Then find the sum.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-10679\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2020\/12\/Big-Ideas-Math-Solutions-Grade-3-Chapter-7-Round-and-Estimate-Numbers-7.4-1.png\" alt=\"Big Ideas Math Solutions Grade 3 Chapter 7 Round and Estimate Numbers 7.4 1\" width=\"543\" height=\"127\" srcset=\"https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2020\/12\/Big-Ideas-Math-Solutions-Grade-3-Chapter-7-Round-and-Estimate-Numbers-7.4-1.png 543w, https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2020\/12\/Big-Ideas-Math-Solutions-Grade-3-Chapter-7-Round-and-Estimate-Numbers-7.4-1-300x70.png 300w\" sizes=\"(max-width: 543px) 100vw, 543px\" \/><\/p>\n<p>Answer:<br \/>\n83 rounded=80\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0156 rounded=200<br \/>\n119 rounded=120\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0103 rounded= 100<br \/>\nSum =120+80=200\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0Sum= 200+100= 300<\/p>\n<p><strong>Construct Arguments<\/strong><br \/>\nCompare your answers to your partner\u2019s answers. Explain why they are the same or why they are different.<\/p>\n<p>Answer:<br \/>\nThe answers are different because the numbers are given to me and my partner are completely different.<\/p>\n<p><strong>Think and Grow: Estimate Sums<\/strong><br \/>\nAn estimate is a number that is close to an exact number. You can estimate a sum by rounding or by using compatible numbers. Compatible numbers are numbers that are easy to add mentally and are close to the actual numbers.<br \/>\n<strong>Example<\/strong><br \/>\nEstimate 258 + 631.<br \/>\nOne Way: Use rounding. Round each addend to the nearest hundred. Then f ind the sum of the rounded numbers.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-10680\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2020\/12\/Big-Ideas-Math-Solutions-Grade-3-Chapter-7-Round-and-Estimate-Numbers-7.4-2.png\" alt=\"Big Ideas Math Solutions Grade 3 Chapter 7 Round and Estimate Numbers 7.4 2\" width=\"492\" height=\"116\" srcset=\"https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2020\/12\/Big-Ideas-Math-Solutions-Grade-3-Chapter-7-Round-and-Estimate-Numbers-7.4-2.png 492w, https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2020\/12\/Big-Ideas-Math-Solutions-Grade-3-Chapter-7-Round-and-Estimate-Numbers-7.4-2-300x71.png 300w\" sizes=\"(max-width: 492px) 100vw, 492px\" \/><br \/>\nAnother Way: Use compatible numbers.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-10681\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2020\/12\/Big-Ideas-Math-Solutions-Grade-3-Chapter-7-Round-and-Estimate-Numbers-7.4-3.png\" alt=\"Big Ideas Math Solutions Grade 3 Chapter 7 Round and Estimate Numbers 7.4 3\" width=\"485\" height=\"110\" srcset=\"https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2020\/12\/Big-Ideas-Math-Solutions-Grade-3-Chapter-7-Round-and-Estimate-Numbers-7.4-3.png 485w, https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2020\/12\/Big-Ideas-Math-Solutions-Grade-3-Chapter-7-Round-and-Estimate-Numbers-7.4-3-300x68.png 300w\" sizes=\"(max-width: 485px) 100vw, 485px\" \/><\/p>\n<p>Answer:<\/p>\n<p>ONE WAY: Rounding system<br \/>\n258 rounded nearest hundred: 300<br \/>\n631 rounded nearest hundred: 600<br \/>\nTotal Rounded Nearest Hundred of 258 and 631=900<br \/>\nOTHER WAY:\u00a0 Use Compatible number<br \/>\nCompatible number of 258=250<br \/>\nCompatible number of 631= 625<br \/>\nTotal Sum of Compatible number of\u00a0 258 and 631= 250+625= 875<\/p>\n<p><strong>Show and Grow<\/strong><\/p>\n<p>Question 1.<br \/>\nRound to the nearest ten to estimate the sum.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-10682\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2020\/12\/Big-Ideas-Math-Solutions-Grade-3-Chapter-7-Round-and-Estimate-Numbers-7.4-4.png\" alt=\"Big Ideas Math Solutions Grade 3 Chapter 7 Round and Estimate Numbers 7.4 4\" width=\"222\" height=\"105\" \/><\/p>\n<p>Answer:<\/p>\n<p><a href=\"https:\/\/ccssmathanswers.com\/?attachment_id=18479\" rel=\"attachment wp-att-18479\"><img loading=\"lazy\" class=\"alignnone size-full wp-image-18479\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2020\/12\/7.4-show-and-grow.png\" alt=\"\" width=\"556\" height=\"113\" srcset=\"https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2020\/12\/7.4-show-and-grow.png 556w, https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2020\/12\/7.4-show-and-grow-300x61.png 300w\" sizes=\"(max-width: 556px) 100vw, 556px\" \/><\/a><br \/>\nNearest Ten of 38= 40.<\/p>\n<p><a href=\"https:\/\/ccssmathanswers.com\/big-ideas-math-answers-grade-3-chapter-7\/7-4-round-number-show-and-grow\/\" rel=\"attachment wp-att-18480\"><img loading=\"lazy\" class=\"alignnone size-full wp-image-18480\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2020\/12\/7.4-round-number-show-and-grow.png\" alt=\"\" width=\"562\" height=\"84\" srcset=\"https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2020\/12\/7.4-round-number-show-and-grow.png 562w, https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2020\/12\/7.4-round-number-show-and-grow-300x45.png 300w\" sizes=\"(max-width: 562px) 100vw, 562px\" \/><\/a><br \/>\nNearest Ten of 45= 50<br \/>\nTotal sum of Nearest Ten of 45 and 38=40+50=90.<\/p>\n<p>Question 2.<br \/>\nRound to the nearest hundred to estimate the sum.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-10683\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2020\/12\/Big-Ideas-Math-Solutions-Grade-3-Chapter-7-Round-and-Estimate-Numbers-7.4-5.png\" alt=\"Big Ideas Math Solutions Grade 3 Chapter 7 Round and Estimate Numbers 7.4 5\" width=\"248\" height=\"100\" \/><\/p>\n<p>Answer:<\/p>\n<p><a href=\"https:\/\/ccssmathanswers.com\/big-ideas-math-answers-grade-3-chapter-7\/7-4-round-number-show-and-grow-3\/\" rel=\"attachment wp-att-18484\"><img loading=\"lazy\" class=\"alignnone size-full wp-image-18484\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2020\/12\/7.4-round-number-show-and-grow-2.png\" alt=\"\" width=\"595\" height=\"125\" srcset=\"https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2020\/12\/7.4-round-number-show-and-grow-2.png 595w, https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2020\/12\/7.4-round-number-show-and-grow-2-300x63.png 300w\" sizes=\"(max-width: 595px) 100vw, 595px\" \/><\/a><br \/>\nNearest Hundred of 407= 400.<br \/>\n<a href=\"https:\/\/ccssmathanswers.com\/big-ideas-math-answers-grade-3-chapter-7\/7-4-round-number-show-and-grow-4\/\" rel=\"attachment wp-att-18485\"><img loading=\"lazy\" class=\"alignnone size-full wp-image-18485\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2020\/12\/7.4-round-number-show-and-grow-3.png\" alt=\"\" width=\"547\" height=\"121\" srcset=\"https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2020\/12\/7.4-round-number-show-and-grow-3.png 547w, https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2020\/12\/7.4-round-number-show-and-grow-3-300x66.png 300w\" sizes=\"(max-width: 547px) 100vw, 547px\" \/><\/a><br \/>\nNearest Hundred of 189= 200<br \/>\nTotal Sum of Nearest Hundred of 407 and 189= 400+200=600.<\/p>\n<p><strong>Use compatible numbers to estimate the sum.<\/strong><\/p>\n<p>Question 3.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-10684\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2020\/12\/Big-Ideas-Math-Solutions-Grade-3-Chapter-7-Round-and-Estimate-Numbers-7.4-6.png\" alt=\"Big Ideas Math Solutions Grade 3 Chapter 7 Round and Estimate Numbers 7.4 6\" width=\"223\" height=\"111\" \/><\/p>\n<p>Answer:<br \/>\n71 Compatible Number= 75<br \/>\n22 Compatible Number=\u00a0 20<br \/>\nTotal Sum of\u00a0 Compatible Number of 71 and 22= 75+20=95.<\/p>\n<p>Question 4.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-10685\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2020\/12\/Big-Ideas-Math-Solutions-Grade-3-Chapter-7-Round-and-Estimate-Numbers-7.4-7.png\" alt=\"Big Ideas Math Solutions Grade 3 Chapter 7 Round and Estimate Numbers 7.4 7\" width=\"243\" height=\"110\" \/><\/p>\n<p>Answer:<br \/>\n353 Compatible Number= 355<br \/>\n142 Compatible Number= 140<br \/>\nTotal Sum of Compatible Number of 353 and 142=\u00a0 355+140= 495.<\/p>\n<p><strong>Apply and Grow: Practice<\/strong><br \/>\n<strong>Round to the nearest ten to estimate the sum.<\/strong><\/p>\n<p>Question 5.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-10686\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2020\/12\/Big-Ideas-Math-Solutions-Grade-3-Chapter-7-Round-and-Estimate-Numbers-7.4-8.png\" alt=\"Big Ideas Math Solutions Grade 3 Chapter 7 Round and Estimate Numbers 7.4 8\" width=\"174\" height=\"118\" \/><\/p>\n<p>Answer:<br \/>\n<a href=\"https:\/\/ccssmathanswers.com\/big-ideas-math-answers-grade-3-chapter-7\/7-4-round-number-show-and-grow-5\/\" rel=\"attachment wp-att-18486\"><img loading=\"lazy\" class=\"alignnone size-full wp-image-18486\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2020\/12\/7.4-round-number-show-and-grow-4.png\" alt=\"\" width=\"581\" height=\"123\" srcset=\"https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2020\/12\/7.4-round-number-show-and-grow-4.png 581w, https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2020\/12\/7.4-round-number-show-and-grow-4-300x64.png 300w\" sizes=\"(max-width: 581px) 100vw, 581px\" \/><\/a><br \/>\nNearest Ten of 214= 210.<br \/>\n<a href=\"https:\/\/ccssmathanswers.com\/big-ideas-math-answers-grade-3-chapter-7\/7-4-round-number-show-and-grow-6\/\" rel=\"attachment wp-att-18487\"><img loading=\"lazy\" class=\"alignnone size-full wp-image-18487\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2020\/12\/7.4-round-number-show-and-grow-5.png\" alt=\"\" width=\"588\" height=\"124\" srcset=\"https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2020\/12\/7.4-round-number-show-and-grow-5.png 588w, https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2020\/12\/7.4-round-number-show-and-grow-5-300x63.png 300w\" sizes=\"(max-width: 588px) 100vw, 588px\" \/><\/a><br \/>\nNearest Ten of 357= 360<br \/>\nSum of Nearest Ten of 214 and 357= 210+360 =\u00a0 570.<\/p>\n<p>Question 6.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-10687\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2020\/12\/Big-Ideas-Math-Solutions-Grade-3-Chapter-7-Round-and-Estimate-Numbers-7.4-9.png\" alt=\"Big Ideas Math Solutions Grade 3 Chapter 7 Round and Estimate Numbers 7.4 9\" width=\"168\" height=\"119\" \/><\/p>\n<p>Answer:<br \/>\n<a href=\"https:\/\/ccssmathanswers.com\/big-ideas-math-answers-grade-3-chapter-7\/7-4-round-number-show-and-grow-7\/\" rel=\"attachment wp-att-18488\"><img loading=\"lazy\" class=\"alignnone size-full wp-image-18488\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2020\/12\/7.4-round-number-show-and-grow-6.png\" alt=\"\" width=\"529\" height=\"111\" srcset=\"https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2020\/12\/7.4-round-number-show-and-grow-6.png 529w, https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2020\/12\/7.4-round-number-show-and-grow-6-300x63.png 300w\" sizes=\"(max-width: 529px) 100vw, 529px\" \/><\/a><br \/>\nNearest Ten of 465= 470.<\/p>\n<p><a href=\"https:\/\/ccssmathanswers.com\/big-ideas-math-answers-grade-3-chapter-7\/7-4-round-number-show-and-grow-8\/\" rel=\"attachment wp-att-18489\"><img loading=\"lazy\" class=\"alignnone size-full wp-image-18489\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2020\/12\/7.4-round-number-show-and-grow-7.png\" alt=\"\" width=\"550\" height=\"95\" srcset=\"https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2020\/12\/7.4-round-number-show-and-grow-7.png 550w, https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2020\/12\/7.4-round-number-show-and-grow-7-300x52.png 300w\" sizes=\"(max-width: 550px) 100vw, 550px\" \/><\/a><br \/>\nNearest Ten of 23= 20<br \/>\nSum of Nearest Ten of 465 and 23= 470+20 = 490.<\/p>\n<p>Question 7.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-10688\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2020\/12\/Big-Ideas-Math-Solutions-Grade-3-Chapter-7-Round-and-Estimate-Numbers-7.4-10.png\" alt=\"Big Ideas Math Solutions Grade 3 Chapter 7 Round and Estimate Numbers 7.4 10\" width=\"163\" height=\"110\" \/><\/p>\n<p>Answer:<\/p>\n<p><a href=\"https:\/\/ccssmathanswers.com\/big-ideas-math-answers-grade-3-chapter-7\/7-4-round-numbers-apply-and-grow\/\" rel=\"attachment wp-att-18490\"><img loading=\"lazy\" class=\"alignnone size-full wp-image-18490\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2020\/12\/7.4-round-numbers-apply-and-grow.png\" alt=\"\" width=\"548\" height=\"129\" srcset=\"https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2020\/12\/7.4-round-numbers-apply-and-grow.png 548w, https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2020\/12\/7.4-round-numbers-apply-and-grow-300x71.png 300w\" sizes=\"(max-width: 548px) 100vw, 548px\" \/><\/a><br \/>\n<a href=\"https:\/\/ccssmathanswers.com\/big-ideas-math-answers-grade-3-chapter-7\/7-4-round-numbers-apply-and-grow\/\" rel=\"attachment wp-att-18490\">\u00a0<\/a>Nearest Ten of 532= 530.<br \/>\n<a href=\"https:\/\/ccssmathanswers.com\/big-ideas-math-answers-grade-3-chapter-7\/7-4-round-numbers-apply-and-grow-2\/\" rel=\"attachment wp-att-18491\"><img loading=\"lazy\" class=\"alignnone size-full wp-image-18491\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2020\/12\/7.4-round-numbers-apply-and-grow-1.png\" alt=\"\" width=\"558\" height=\"94\" srcset=\"https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2020\/12\/7.4-round-numbers-apply-and-grow-1.png 558w, https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2020\/12\/7.4-round-numbers-apply-and-grow-1-300x51.png 300w\" sizes=\"(max-width: 558px) 100vw, 558px\" \/><\/a><br \/>\nNearest Ten of 241= 240<br \/>\nTotal Sum of Nearest Ten of 214 and 357= 530+240 = 570.<br \/>\n<strong>Round to the nearest hundred to estimate the sum.<\/strong><\/p>\n<p>Question 8.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-10689\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2020\/12\/Big-Ideas-Math-Solutions-Grade-3-Chapter-7-Round-and-Estimate-Numbers-7.4-11.png\" alt=\"Big Ideas Math Solutions Grade 3 Chapter 7 Round and Estimate Numbers 7.4 11\" width=\"160\" height=\"118\" \/><\/p>\n<p>Answer:<\/p>\n<p><a href=\"https:\/\/ccssmathanswers.com\/big-ideas-math-answers-grade-3-chapter-7\/7-4-round-numbers-apply-and-grow-3\/\" rel=\"attachment wp-att-18494\"><img loading=\"lazy\" class=\"alignnone size-full wp-image-18494\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2020\/12\/7.4-round-numbers-apply-and-grow-2.png\" alt=\"\" width=\"539\" height=\"101\" srcset=\"https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2020\/12\/7.4-round-numbers-apply-and-grow-2.png 539w, https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2020\/12\/7.4-round-numbers-apply-and-grow-2-300x56.png 300w\" sizes=\"(max-width: 539px) 100vw, 539px\" \/><\/a><br \/>\nNearest Hundred of 62 = 100.<br \/>\n<a href=\"https:\/\/ccssmathanswers.com\/big-ideas-math-answers-grade-3-chapter-7\/7-4-round-numbers-apply-and-grow-4\/\" rel=\"attachment wp-att-18495\"><img loading=\"lazy\" class=\"alignnone size-full wp-image-18495\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2020\/12\/7.4-round-numbers-apply-and-grow-3.png\" alt=\"\" width=\"558\" height=\"142\" srcset=\"https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2020\/12\/7.4-round-numbers-apply-and-grow-3.png 558w, https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2020\/12\/7.4-round-numbers-apply-and-grow-3-300x76.png 300w\" sizes=\"(max-width: 558px) 100vw, 558px\" \/><\/a><br \/>\nNearest Hundred of 75= 100<br \/>\nTotal Sum of Nearest Hundred of 62 and 75=\u00a0 100+100=200.<\/p>\n<p>Question 9.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-10690\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2020\/12\/Big-Ideas-Math-Solutions-Grade-3-Chapter-7-Round-and-Estimate-Numbers-7.4-12.png\" alt=\"Big Ideas Math Solutions Grade 3 Chapter 7 Round and Estimate Numbers 7.4 12\" width=\"162\" height=\"124\" \/><\/p>\n<p>Answer:<br \/>\n<a href=\"https:\/\/ccssmathanswers.com\/big-ideas-math-answers-grade-3-chapter-7\/7-4-round-numbers-apply-and-grow-5\/\" rel=\"attachment wp-att-18496\"><img loading=\"lazy\" class=\"alignnone size-full wp-image-18496\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2020\/12\/7.4-round-numbers-apply-and-grow-4.png\" alt=\"\" width=\"547\" height=\"81\" srcset=\"https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2020\/12\/7.4-round-numbers-apply-and-grow-4.png 547w, https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2020\/12\/7.4-round-numbers-apply-and-grow-4-300x44.png 300w\" sizes=\"(max-width: 547px) 100vw, 547px\" \/><\/a><br \/>\nNearest Hundred of 304 = 300.<\/p>\n<p><a href=\"https:\/\/ccssmathanswers.com\/big-ideas-math-answers-grade-3-chapter-7\/7-4-round-numbers-apply-and-grow-6\/\" rel=\"attachment wp-att-18497\"><img loading=\"lazy\" class=\"alignnone size-full wp-image-18497\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2020\/12\/7.4-round-numbers-apply-and-grow-5.png\" alt=\"\" width=\"540\" height=\"128\" srcset=\"https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2020\/12\/7.4-round-numbers-apply-and-grow-5.png 540w, https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2020\/12\/7.4-round-numbers-apply-and-grow-5-300x71.png 300w\" sizes=\"(max-width: 540px) 100vw, 540px\" \/><\/a><br \/>\nNearest Hundred of 381= 400<br \/>\nTotal Sum of Nearest Hundred of 304 and 381= 300+400=700.<\/p>\n<p>Question 10.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-10691\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2020\/12\/Big-Ideas-Math-Solutions-Grade-3-Chapter-7-Round-and-Estimate-Numbers-7.4-13.png\" alt=\"Big Ideas Math Solutions Grade 3 Chapter 7 Round and Estimate Numbers 7.4 13\" width=\"161\" height=\"129\" \/><\/p>\n<p>Answer:<\/p>\n<p><a href=\"https:\/\/ccssmathanswers.com\/big-ideas-math-answers-grade-3-chapter-7\/7-4-round-numbers-apply-and-grow-7\/\" rel=\"attachment wp-att-18498\"><img loading=\"lazy\" class=\"alignnone size-full wp-image-18498\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2020\/12\/7.4-round-numbers-apply-and-grow-6.png\" alt=\"\" width=\"540\" height=\"107\" srcset=\"https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2020\/12\/7.4-round-numbers-apply-and-grow-6.png 540w, https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2020\/12\/7.4-round-numbers-apply-and-grow-6-300x59.png 300w\" sizes=\"(max-width: 540px) 100vw, 540px\" \/><\/a><br \/>\nNearest Hundred of 897 = 900.<\/p>\n<p><a href=\"https:\/\/ccssmathanswers.com\/big-ideas-math-answers-grade-3-chapter-7\/7-4-round-numbers-apply-and-grow-8\/\" rel=\"attachment wp-att-18499\"><img loading=\"lazy\" class=\"alignnone size-full wp-image-18499\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2020\/12\/7.4-round-numbers-apply-and-grow-7.png\" alt=\"\" width=\"548\" height=\"98\" srcset=\"https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2020\/12\/7.4-round-numbers-apply-and-grow-7.png 548w, https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2020\/12\/7.4-round-numbers-apply-and-grow-7-300x54.png 300w\" sizes=\"(max-width: 548px) 100vw, 548px\" \/><\/a><br \/>\nNearest Hundred of 126= 100<br \/>\nTotal Sum of Nearest Hundred of 897 and 126= 900+100=1000.<br \/>\n<strong>Use compatible numbers to estimate the sum.<\/strong><\/p>\n<p>Question 11.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-10692\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2020\/12\/Big-Ideas-Math-Solutions-Grade-3-Chapter-7-Round-and-Estimate-Numbers-7.4-14.png\" alt=\"Big Ideas Math Solutions Grade 3 Chapter 7 Round and Estimate Numbers 7.4 14\" width=\"161\" height=\"109\" \/><\/p>\n<p>Answer:<br \/>\nCompatible Number of 222= 225<br \/>\nCompatible Number of 678= 670<br \/>\nTotal Sum of Compatible Number of 222 and 678= 225+670=895.<\/p>\n<p>Question 12.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-10693\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2020\/12\/Big-Ideas-Math-Solutions-Grade-3-Chapter-7-Round-and-Estimate-Numbers-7.4-15.png\" alt=\"Big Ideas Math Solutions Grade 3 Chapter 7 Round and Estimate Numbers 7.4 15\" width=\"158\" height=\"114\" \/><\/p>\n<p>Answer:<br \/>\nCompatible Number of 491= 495<br \/>\nCompatible Number of 407= 465<br \/>\nTotal Sum of Compatible Number of 491 and 407= 495+465=960.<\/p>\n<p>Question 13.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-10694\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2020\/12\/Big-Ideas-Math-Solutions-Grade-3-Chapter-7-Round-and-Estimate-Numbers-7.4-16.png\" alt=\"Big Ideas Math Solutions Grade 3 Chapter 7 Round and Estimate Numbers 7.4 16\" width=\"169\" height=\"124\" \/><\/p>\n<p>Answer:<br \/>\nCompatible Number of 347= 350<br \/>\nCompatible Number of 52= 45<br \/>\nTotal Sum of Compatible Number of 347 and 52= 395.<\/p>\n<p><strong>Estimate the sum.<\/strong><\/p>\n<p>Question 14.<br \/>\n326 + 472<br \/>\n__ + ___ = ____<\/p>\n<p>Answer:<br \/>\nSum of 326 + 472 = 798.<\/p>\n<p>Question 15.<br \/>\n205 + 101<br \/>\n____ + ____ = _____<\/p>\n<p>Answer:<br \/>\nSum of 205 + 101 = 306.<\/p>\n<p>Question 16.<br \/>\n58 + 24<br \/>\n____ + ____ = ____<\/p>\n<p>Answer:<br \/>\nSum of 58 +24 = 82.<\/p>\n<p>Question 17.<br \/>\nStructure<br \/>\nEstimate the sum of 324 + 277 two different ways.<\/p>\n<p>Answer:<br \/>\nONE WAY: Rounding system<br \/>\nNearest Ten of 324= 320<br \/>\nNearest Ten of 277= 280<br \/>\nTotal Sum of Nearest Hundred of 324 and 277= 320+280= 600.<br \/>\nOTHER WAY: Compatible Numbers<br \/>\nCompatible Numbers of\u00a0 324=330<br \/>\nCompatible Numbers of 277= 285<br \/>\nTotal Sum of Compatible Numbers of 324 and 277=330+285=615.<br \/>\n<strong>Think and Grow: Modeling Real Life<\/strong><br \/>\nAn airplane flies from Cleveland to Saint Louis. Then it flies from Saint Louis to Chicago. About how many miles does the airplane fly in all?<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-10695\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2020\/12\/Big-Ideas-Math-Solutions-Grade-3-Chapter-7-Round-and-Estimate-Numbers-7.4-17.png\" alt=\"Big Ideas Math Solutions Grade 3 Chapter 7 Round and Estimate Numbers 7.4 17\" width=\"255\" height=\"195\" \/><br \/>\nUnderstand the problem:<br \/>\nMake a plan:<br \/>\nSolve:<br \/>\nThe airplane flies about ______ miles in all.<\/p>\n<p>Answer:<br \/>\n<a href=\"https:\/\/ccssmathanswers.com\/big-ideas-math-answers-grade-3-chapter-7\/7-4-17ans\/\" rel=\"attachment wp-att-17273\"><img loading=\"lazy\" class=\"alignnone wp-image-17273 size-full\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2020\/12\/7.4-17ans.jpg\" alt=\"\" width=\"289\" height=\"153\" \/><\/a><br \/>\nDistance covered by the airplane flies\u00a0 overall = 262 miles+49 miles+253 miles+547 miles= 1553 miles .<br \/>\nDistance covered by Airplane from Cleveland to Saint Louis=491 miles<br \/>\nDistance covered by Airplane from Saint Louis to Chicago= 262 miles<br \/>\nTotal\u00a0 distance covered by the Airplane from Cleveland to Saint Louis and\u00a0 Saint Louis to Chicago = 491 miles + 262 miles= 753 miles.<br \/>\n<strong>Show and Grow<\/strong><\/p>\n<p>Question 18.<br \/>\nUse the map above. An airplane flies from Dallas to Saint Louis, and then flies from Saint Louis to Nashville. About how many miles does the airplane fly in all?<\/p>\n<p>Answer:<br \/>\nMiles covered by the airplane from Dallas to Saint Louis= 547 miles<br \/>\nMiles covered by the airplane from Saint Louis to Nashville= 253 miles<br \/>\nTotal Number of miles the airplane flew in all= 547 miles+253 miles= 800 miles.<\/p>\n<p>Question 19.<br \/>\nThere are 178 third-grade students, 239 fourth-grade students, and 309 fifth-grade students at a museum. About how many students are at the museum? Explain.<br \/>\nIs there another way you can estimate to solve the problem? Explain.<\/p>\n<p>Answer:<br \/>\nNumber of third-grade students at a museum=178<br \/>\nNumber of fourth-grade students at a museum=239<br \/>\nNumber of fifth-grade students at a museum=309<br \/>\nTotal Number of students at a museum=178+239+309=726.<br \/>\nNo, there is no other way to estimate the solution except addition.<\/p>\n<h3><a id=\"Estimate_Sums_Homework_&amp;_Practice_7.4\"><\/a>Estimate Sums Homework &amp; Practice 7.4<\/h3>\n<p><strong>Round to the nearest ten to estimate the sum.<\/strong><\/p>\n<p>Question 1.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-10696\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2020\/12\/Big-Ideas-Math-Solutions-Grade-3-Chapter-7-Round-and-Estimate-Numbers-7.4-18.png\" alt=\"Big Ideas Math Solutions Grade 3 Chapter 7 Round and Estimate Numbers 7.4 18\" width=\"178\" height=\"102\" \/><\/p>\n<p>Answer:<br \/>\n<a href=\"https:\/\/ccssmathanswers.com\/?attachment_id=18500\" rel=\"attachment wp-att-18500\"><img loading=\"lazy\" class=\"alignnone size-full wp-image-18500\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2020\/12\/7.4-round-numbers-apply-and-grow-8.png\" alt=\"\" width=\"559\" height=\"83\" srcset=\"https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2020\/12\/7.4-round-numbers-apply-and-grow-8.png 559w, https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2020\/12\/7.4-round-numbers-apply-and-grow-8-300x45.png 300w\" sizes=\"(max-width: 559px) 100vw, 559px\" \/><\/a><br \/>\nNearest Ten of 239= 240.<\/p>\n<p><a href=\"https:\/\/ccssmathanswers.com\/big-ideas-math-answers-grade-3-chapter-7\/7-4-round-numbers-apply-and-grow-10\/\" rel=\"attachment wp-att-18501\"><img loading=\"lazy\" class=\"alignnone size-full wp-image-18501\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2020\/12\/7.4-round-numbers-apply-and-grow-9.png\" alt=\"\" width=\"544\" height=\"115\" srcset=\"https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2020\/12\/7.4-round-numbers-apply-and-grow-9.png 544w, https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2020\/12\/7.4-round-numbers-apply-and-grow-9-300x63.png 300w\" sizes=\"(max-width: 544px) 100vw, 544px\" \/><\/a><br \/>\nNearest Ten of 417= 420<br \/>\nTotal Sum of Nearest Ten of 239 and 417= 240+420 = 660.<\/p>\n<p>Question 2.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-10697\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2020\/12\/Big-Ideas-Math-Solutions-Grade-3-Chapter-7-Round-and-Estimate-Numbers-7.4-19.png\" alt=\"Big Ideas Math Solutions Grade 3 Chapter 7 Round and Estimate Numbers 7.4 19\" width=\"170\" height=\"122\" \/><\/p>\n<p>Answer:<br \/>\n<a href=\"https:\/\/ccssmathanswers.com\/big-ideas-math-answers-grade-3-chapter-7\/7-4-round-numbers-apply-and-grow-12\/\" rel=\"attachment wp-att-18503\"><img loading=\"lazy\" class=\"alignnone size-full wp-image-18503\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2020\/12\/7.4-round-numbers-apply-and-grow-11.png\" alt=\"\" width=\"534\" height=\"118\" srcset=\"https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2020\/12\/7.4-round-numbers-apply-and-grow-11.png 534w, https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2020\/12\/7.4-round-numbers-apply-and-grow-11-300x66.png 300w\" sizes=\"(max-width: 534px) 100vw, 534px\" \/><\/a><br \/>\nNearest Ten of 351= 350.<\/p>\n<p><a href=\"https:\/\/ccssmathanswers.com\/big-ideas-math-answers-grade-3-chapter-7\/7-4-round-numbers-apply-and-grow-13\/\" rel=\"attachment wp-att-18504\"><img loading=\"lazy\" class=\"alignnone size-full wp-image-18504\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2020\/12\/7.4-round-numbers-apply-and-grow-12.png\" alt=\"\" width=\"562\" height=\"115\" srcset=\"https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2020\/12\/7.4-round-numbers-apply-and-grow-12.png 562w, https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2020\/12\/7.4-round-numbers-apply-and-grow-12-300x61.png 300w\" sizes=\"(max-width: 562px) 100vw, 562px\" \/><\/a><br \/>\nNearest Ten of 164= 160<br \/>\nTotal Sum of Nearest Ten of 351 and 164 = 350+160 = 510.<\/p>\n<p>Question 3.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-10698\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2020\/12\/Big-Ideas-Math-Solutions-Grade-3-Chapter-7-Round-and-Estimate-Numbers-7.4-20.png\" alt=\"Big Ideas Math Solutions Grade 3 Chapter 7 Round and Estimate Numbers 7.4 20\" width=\"154\" height=\"122\" \/><\/p>\n<p>Answer:<\/p>\n<p><a href=\"https:\/\/ccssmathanswers.com\/big-ideas-math-answers-grade-3-chapter-7\/7-4-round-numbers-apply-and-grow-14\/\" rel=\"attachment wp-att-18505\"><img loading=\"lazy\" class=\"alignnone size-full wp-image-18505\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2020\/12\/7.4-round-numbers-apply-and-grow-13.png\" alt=\"\" width=\"552\" height=\"71\" srcset=\"https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2020\/12\/7.4-round-numbers-apply-and-grow-13.png 552w, https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2020\/12\/7.4-round-numbers-apply-and-grow-13-300x39.png 300w\" sizes=\"(max-width: 552px) 100vw, 552px\" \/><\/a><br \/>\nNearest Ten of 55= 60.<\/p>\n<p><a href=\"https:\/\/ccssmathanswers.com\/big-ideas-math-answers-grade-3-chapter-7\/7-4-round-numbers-apply-and-grow-15\/\" rel=\"attachment wp-att-18506\"><img loading=\"lazy\" class=\"alignnone size-full wp-image-18506\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2020\/12\/7.4-round-numbers-apply-and-grow-14.png\" alt=\"\" width=\"579\" height=\"109\" srcset=\"https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2020\/12\/7.4-round-numbers-apply-and-grow-14.png 579w, https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2020\/12\/7.4-round-numbers-apply-and-grow-14-300x56.png 300w\" sizes=\"(max-width: 579px) 100vw, 579px\" \/><\/a><br \/>\nNearest Ten of 43= 40<br \/>\nTotal Sum of Nearest Ten of 55 and 43 = 60+40 = 100.<br \/>\n<strong>Round to the nearest hundred to estimate the sum.<\/strong><\/p>\n<p>Question 4.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-10699\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2020\/12\/Big-Ideas-Math-Solutions-Grade-3-Chapter-7-Round-and-Estimate-Numbers-7.4-21.png\" alt=\"Big Ideas Math Solutions Grade 3 Chapter 7 Round and Estimate Numbers 7.4 21\" width=\"160\" height=\"109\" \/><\/p>\n<p>Answer:<br \/>\n<a href=\"https:\/\/ccssmathanswers.com\/big-ideas-math-answers-grade-3-chapter-7\/7-4-round-numbers-apply-and-grow-16\/\" rel=\"attachment wp-att-18507\"><img loading=\"lazy\" class=\"alignnone size-full wp-image-18507\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2020\/12\/7.4-round-numbers-apply-and-grow-15.png\" alt=\"\" width=\"540\" height=\"86\" srcset=\"https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2020\/12\/7.4-round-numbers-apply-and-grow-15.png 540w, https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2020\/12\/7.4-round-numbers-apply-and-grow-15-300x48.png 300w\" sizes=\"(max-width: 540px) 100vw, 540px\" \/><\/a><br \/>\nNearest Hundred of 523= 500.<\/p>\n<p><a href=\"https:\/\/ccssmathanswers.com\/big-ideas-math-answers-grade-3-chapter-7\/7-4-round-numbers-apply-and-grow-17\/\" rel=\"attachment wp-att-18508\"><img loading=\"lazy\" class=\"alignnone size-full wp-image-18508\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2020\/12\/7.4-round-numbers-apply-and-grow-16.png\" alt=\"\" width=\"532\" height=\"86\" srcset=\"https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2020\/12\/7.4-round-numbers-apply-and-grow-16.png 532w, https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2020\/12\/7.4-round-numbers-apply-and-grow-16-300x48.png 300w\" sizes=\"(max-width: 532px) 100vw, 532px\" \/><\/a><br \/>\nNearest Hundred of 376=400<br \/>\nTotal Sum of Nearest Hundred of 523 and 376= 500 + 400 = 900.<\/p>\n<p>Question 5.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-10700\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2020\/12\/Big-Ideas-Math-Solutions-Grade-3-Chapter-7-Round-and-Estimate-Numbers-7.4-22.png\" alt=\"Big Ideas Math Solutions Grade 3 Chapter 7 Round and Estimate Numbers 7.4 22\" width=\"162\" height=\"105\" \/><\/p>\n<p>Answer:<br \/>\n<a href=\"https:\/\/ccssmathanswers.com\/big-ideas-math-answers-grade-3-chapter-7\/7-4-round-numbers-apply-and-grow-18\/\" rel=\"attachment wp-att-18509\"><img loading=\"lazy\" class=\"alignnone size-full wp-image-18509\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2020\/12\/7.4-round-numbers-apply-and-grow-17.png\" alt=\"\" width=\"555\" height=\"87\" srcset=\"https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2020\/12\/7.4-round-numbers-apply-and-grow-17.png 555w, https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2020\/12\/7.4-round-numbers-apply-and-grow-17-300x47.png 300w\" sizes=\"(max-width: 555px) 100vw, 555px\" \/><\/a><br \/>\nNearest Hundred of 648=600<\/p>\n<p><a href=\"https:\/\/ccssmathanswers.com\/big-ideas-math-answers-grade-3-chapter-7\/7-4-round-numbers-apply-and-grow-19\/\" rel=\"attachment wp-att-18510\"><img loading=\"lazy\" class=\"alignnone size-full wp-image-18510\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2020\/12\/7.4-round-numbers-apply-and-grow-18.png\" alt=\"\" width=\"537\" height=\"91\" srcset=\"https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2020\/12\/7.4-round-numbers-apply-and-grow-18.png 537w, https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2020\/12\/7.4-round-numbers-apply-and-grow-18-300x51.png 300w\" sizes=\"(max-width: 537px) 100vw, 537px\" \/><\/a><br \/>\nNearest Hundred of 21=0<br \/>\nTotal Sum of Nearest Hundred of 648 and 21= 600+0 = 600.<\/p>\n<p>Question 6.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-10701\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2020\/12\/Big-Ideas-Math-Solutions-Grade-3-Chapter-7-Round-and-Estimate-Numbers-7.4-23.png\" alt=\"Big Ideas Math Solutions Grade 3 Chapter 7 Round and Estimate Numbers 7.4 23\" width=\"167\" height=\"108\" \/><\/p>\n<p>Answer:<br \/>\n<a href=\"https:\/\/ccssmathanswers.com\/big-ideas-math-answers-grade-3-chapter-7\/7-4-round-numbers-apply-and-grow-20\/\" rel=\"attachment wp-att-18511\"><img loading=\"lazy\" class=\"alignnone size-full wp-image-18511\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2020\/12\/7.4-round-numbers-apply-and-grow-19.png\" alt=\"\" width=\"525\" height=\"94\" srcset=\"https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2020\/12\/7.4-round-numbers-apply-and-grow-19.png 525w, https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2020\/12\/7.4-round-numbers-apply-and-grow-19-300x54.png 300w\" sizes=\"(max-width: 525px) 100vw, 525px\" \/><\/a><br \/>\nNearest Hundred of 762=800.<\/p>\n<p><a href=\"https:\/\/ccssmathanswers.com\/big-ideas-math-answers-grade-3-chapter-7\/7-4-round-numbers-apply-and-grow-21\/\" rel=\"attachment wp-att-18512\"><img loading=\"lazy\" class=\"alignnone size-full wp-image-18512\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2020\/12\/7.4-round-numbers-apply-and-grow-20.png\" alt=\"\" width=\"552\" height=\"109\" srcset=\"https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2020\/12\/7.4-round-numbers-apply-and-grow-20.png 552w, https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2020\/12\/7.4-round-numbers-apply-and-grow-20-300x59.png 300w\" sizes=\"(max-width: 552px) 100vw, 552px\" \/><\/a><br \/>\nNearest Hundred of 235= 200<br \/>\nTotal Sum of Nearest Hundred of 762 and 235 = 800+200 = 1000.<\/p>\n<p><strong>Use compatible numbers to estimate the sum.<\/strong><\/p>\n<p>Question 7.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-10702\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2020\/12\/Big-Ideas-Math-Solutions-Grade-3-Chapter-7-Round-and-Estimate-Numbers-7.4-24.png\" alt=\"Big Ideas Math Solutions Grade 3 Chapter 7 Round and Estimate Numbers 7.4 24\" width=\"149\" height=\"116\" \/><\/p>\n<p>Answer:<br \/>\nCompatible Number of 26= 30<br \/>\nCompatible Number of 51= 55<br \/>\nTotal Sum of Compatible Number of 26 and 51 = 30+55 = 85.<\/p>\n<p>Question 8.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-10703\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2020\/12\/Big-Ideas-Math-Solutions-Grade-3-Chapter-7-Round-and-Estimate-Numbers-7.4-25.png\" alt=\"Big Ideas Math Solutions Grade 3 Chapter 7 Round and Estimate Numbers 7.4 25\" width=\"156\" height=\"111\" \/><\/p>\n<p>Answer:<br \/>\nCompatible Number of 454= 465<br \/>\nCompatible Number of 448= 455<br \/>\nTotal Sum of Compatible Number of 454 and 448 = 465+455 = 910.<\/p>\n<p>Question 9.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-10704\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2020\/12\/Big-Ideas-Math-Solutions-Grade-3-Chapter-7-Round-and-Estimate-Numbers-7.4-26.png\" alt=\"Big Ideas Math Solutions Grade 3 Chapter 7 Round and Estimate Numbers 7.4 26\" width=\"169\" height=\"120\" \/><\/p>\n<p>Answer:<br \/>\nCompatible Number of 177= 185<br \/>\nCompatible Number of 522= 530<br \/>\nTotal Sum of Compatible Number of 177 and 552 =185+530 = 715.<\/p>\n<p><strong>Estimate the sum<\/strong><\/p>\n<p>Question 10.<br \/>\n621 + 314<br \/>\n____ + ____ = ____<\/p>\n<p>Answer:<br \/>\nSum of 621 + 314 = 935.<\/p>\n<p>Question 11.<br \/>\n105 + 82<br \/>\n____ + ____ = _____<\/p>\n<p>Answer:<br \/>\nSum of 105 + 82 =187.<\/p>\n<p>Question 12.<br \/>\n228 + 276<br \/>\n____ + ____ = _____<\/p>\n<p>Answer:<br \/>\nSum of 228 + 276 = 504.<\/p>\n<p>Question 13.<br \/>\n<strong>DIG DEEPER!<\/strong><br \/>\nWill Newton\u2019s estimated sum be greater than or less than the actual sum? Explain.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-10705\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2020\/12\/Big-Ideas-Math-Solutions-Grade-3-Chapter-7-Round-and-Estimate-Numbers-7.4-27.png\" alt=\"Big Ideas Math Solutions Grade 3 Chapter 7 Round and Estimate Numbers 7.4 27\" width=\"272\" height=\"210\" \/><\/p>\n<p>Answer:<br \/>\nActual Sum of 486 + 379 = 486 + 379 = 865<br \/>\nEstimated Sum of 486 + 379 =500 + 400 = 900<br \/>\nComparison: \u00a0 865 &gt; \u00a0900<br \/>\nHence, the Actual Sum is lesser than the Estimated Sum because the estimated value is the value roughly calculated whereas the actual sum is the correct and accurate value.<\/p>\n<p>Question 14.<br \/>\nLogic<br \/>\nNewton has $25. Descartes has $32. Do they have more than $50 in all? Use estimates to explain.<\/p>\n<p>Answer:<br \/>\nAmount Newtons having= $ 25<br \/>\nEstimated value of $25= $ 30<br \/>\nAmount Descartes having = $32<br \/>\nEstimated value of $32 = $35<br \/>\nTotal\u00a0 Estimated Sum Newtons and Descartes having= $ 30 + $35 = $65.<\/p>\n<p>Question 15.<br \/>\n<strong>Modeling Real Life<\/strong><br \/>\nAn airplane flies from San Francisco to Las Vegas and then files from Las Vegas to Los Angeles. About how many miles does the airplane fly in all?<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-10706\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2020\/12\/Big-Ideas-Math-Solutions-Grade-3-Chapter-7-Round-and-Estimate-Numbers-7.4-28.png\" alt=\"Big Ideas Math Solutions Grade 3 Chapter 7 Round and Estimate Numbers 7.4 28\" width=\"276\" height=\"158\" \/><\/p>\n<p>Answer:<br \/>\n<a href=\"https:\/\/ccssmathanswers.com\/big-ideas-math-answers-grade-3-chapter-7\/7-4-modelling-ans\/\" rel=\"attachment wp-att-17785\"><img loading=\"lazy\" class=\"alignnone wp-image-17785 size-full\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2020\/12\/7.4-MODELLING-ans.jpg\" alt=\"\" width=\"365\" height=\"172\" srcset=\"https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2020\/12\/7.4-MODELLING-ans.jpg 365w, https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2020\/12\/7.4-MODELLING-ans-300x141.jpg 300w\" sizes=\"(max-width: 365px) 100vw, 365px\" \/><\/a><br \/>\nDistance covered by Airplane from San Francisco to Las Vegas=418 miles.<br \/>\nDistance covered by Airplane from Las Vegas to Los Angeles= 236 miles.<br \/>\nTotal\u00a0 distance covered by the Airplane from San Francisco to Las Vegas and Las Vegas to Los Angeles= 418 miles + 236 miles = 654 miles.<\/p>\n<p>Question 16.<br \/>\n<strong>Modeling Real Life<\/strong><br \/>\nA beach hut owner sells 118 towels, 121 surfboards, and 162 bathing suits. About how many items does the owner sell? Explain.<\/p>\n<p>Answer:<br \/>\nNumber of towels the owner sells= 118<br \/>\nNumber of surfboards the owner sells= 121<br \/>\nNumber of bathing suits the owner sells= 162<br \/>\nTotal number of items the owner sells= 118 towels + 121 surfboards +162 bathing suits = 401.<br \/>\n<strong>Review &amp; Refresh<\/strong><br \/>\n<strong>Compare<\/strong><\/p>\n<p>Question 17.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-10707\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2020\/12\/Big-Ideas-Math-Solutions-Grade-3-Chapter-7-Round-and-Estimate-Numbers-7.4-29.png\" alt=\"Big Ideas Math Solutions Grade 3 Chapter 7 Round and Estimate Numbers 7.4 29\" width=\"150\" height=\"41\" \/><\/p>\n<p>Answer:<br \/>\n<img src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2020\/12\/Big-Ideas-Math-Solutions-Grade-3-Chapter-7-Round-and-Estimate-Numbers-7.4-29.png\" alt=\"Big Ideas Math Solutions Grade 3 Chapter 7 Round and Estimate Numbers 7.4 29\" \/> = <a href=\"https:\/\/ccssmathanswers.com\/big-ideas-math-answers-grade-3-chapter-7\/7-4rr-1ans\/\" rel=\"attachment wp-att-17768\"><img loading=\"lazy\" class=\"alignnone size-full wp-image-17768\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2020\/12\/7.4RR-1ANS.jpg\" alt=\"\" width=\"79\" height=\"32\" \/><\/a><\/p>\n<p>Question 18.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-10708\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2020\/12\/Big-Ideas-Math-Solutions-Grade-3-Chapter-7-Round-and-Estimate-Numbers-7.4-30.png\" alt=\"Big Ideas Math Solutions Grade 3 Chapter 7 Round and Estimate Numbers 7.4 30\" width=\"151\" height=\"44\" \/><\/p>\n<p>Answer:<br \/>\n<img src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2020\/12\/Big-Ideas-Math-Solutions-Grade-3-Chapter-7-Round-and-Estimate-Numbers-7.4-30.png\" alt=\"Big Ideas Math Solutions Grade 3 Chapter 7 Round and Estimate Numbers 7.4 30\" \/> = <a href=\"https:\/\/ccssmathanswers.com\/big-ideas-math-answers-grade-3-chapter-7\/7-4rr-1ans-2\/\" rel=\"attachment wp-att-17769\"><img loading=\"lazy\" class=\"alignnone size-full wp-image-17769\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2020\/12\/7.4RR-1ANS-1.jpg\" alt=\"\" width=\"88\" height=\"34\" \/><\/a><\/p>\n<p>Question 19.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-10709\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2020\/12\/Big-Ideas-Math-Solutions-Grade-3-Chapter-7-Round-and-Estimate-Numbers-7.4-31.png\" alt=\"Big Ideas Math Solutions Grade 3 Chapter 7 Round and Estimate Numbers 7.4 31\" width=\"149\" height=\"45\" \/> =<\/p>\n<p>Answer:<br \/>\n<img src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2020\/12\/Big-Ideas-Math-Solutions-Grade-3-Chapter-7-Round-and-Estimate-Numbers-7.4-31.png\" alt=\"Big Ideas Math Solutions Grade 3 Chapter 7 Round and Estimate Numbers 7.4 31\" \/> = <a href=\"https:\/\/ccssmathanswers.com\/big-ideas-math-answers-grade-3-chapter-7\/7-4rr-1ans-3\/\" rel=\"attachment wp-att-17770\"><img loading=\"lazy\" class=\"alignnone size-full wp-image-17770\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2020\/12\/7.4RR-1ANS-2.jpg\" alt=\"\" width=\"85\" height=\"46\" \/><\/a><\/p>\n<h3><a id=\"Lesson_7.5_Estimate_differences\"><\/a>Lesson 7.5 Estimate Differences<\/h3>\n<p><strong>Explore &amp; Sum<\/strong><br \/>\nEstimate each difference.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-10710\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2020\/12\/Big-Ideas-Math-Answer-Key-Grade-3-Chapter-7-Round-and-Estimate-Numbers-7.5-1.png\" alt=\"Big Ideas Math Answer Key Grade 3 Chapter 7 Round and Estimate Numbers 7.5 1\" width=\"544\" height=\"106\" srcset=\"https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2020\/12\/Big-Ideas-Math-Answer-Key-Grade-3-Chapter-7-Round-and-Estimate-Numbers-7.5-1.png 544w, https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2020\/12\/Big-Ideas-Math-Answer-Key-Grade-3-Chapter-7-Round-and-Estimate-Numbers-7.5-1-300x58.png 300w\" sizes=\"(max-width: 544px) 100vw, 544px\" \/><\/p>\n<p>Answer:<\/p>\n<p>Use Compatible numbers<br \/>\n<a href=\"https:\/\/ccssmathanswers.com\/?attachment_id=17773\" rel=\"attachment wp-att-17773\"><img loading=\"lazy\" class=\"alignnone size-full wp-image-17773\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2020\/12\/7.4rr-2ans.png\" alt=\"\" width=\"261\" height=\"114\" \/><\/a><a href=\"https:\/\/ccssmathanswers.com\/big-ideas-math-answers-grade-3-chapter-7\/7-4rr-2ans-2\/\" rel=\"attachment wp-att-17775\"><img loading=\"lazy\" class=\"alignnone size-full wp-image-17775\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2020\/12\/7.4rr-2ans-1.png\" alt=\"\" width=\"267\" height=\"112\" \/><\/a><br \/>\n<strong>Construct Arguments&#8212;&#8211;<\/strong><br \/>\nCompare your answers to your partner\u2019s answers. Explain why they are the same or why they are different.<\/p>\n<p>Answer: The answers differ from my partners answer because the numbers given to me and him are differ\u00a0 may be the process is same which we followed to solve.<br \/>\n<strong>Think and Grow: Estimate Differences<\/strong><br \/>\nYou can estimate difference by rounding or by using compatible numbers<br \/>\n<strong>Example<\/strong><br \/>\nEstimate 673 &#8211; 429.<br \/>\nOne Way: Use rounding. Round each number to the nearest ten. Then find the difference of the rounded numbers.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-10711\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2020\/12\/Big-Ideas-Math-Answer-Key-Grade-3-Chapter-7-Round-and-Estimate-Numbers-7.5-2.png\" alt=\"Big Ideas Math Answer Key Grade 3 Chapter 7 Round and Estimate Numbers 7.5 2\" width=\"494\" height=\"103\" srcset=\"https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2020\/12\/Big-Ideas-Math-Answer-Key-Grade-3-Chapter-7-Round-and-Estimate-Numbers-7.5-2.png 494w, https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2020\/12\/Big-Ideas-Math-Answer-Key-Grade-3-Chapter-7-Round-and-Estimate-Numbers-7.5-2-300x63.png 300w\" sizes=\"(max-width: 494px) 100vw, 494px\" \/><br \/>\nAnother Way: Use compatible numbers.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-10712\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2020\/12\/Big-Ideas-Math-Answer-Key-Grade-3-Chapter-7-Round-and-Estimate-Numbers-7.5-3.png\" alt=\"Big Ideas Math Answer Key Grade 3 Chapter 7 Round and Estimate Numbers 7.5 3\" width=\"507\" height=\"111\" srcset=\"https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2020\/12\/Big-Ideas-Math-Answer-Key-Grade-3-Chapter-7-Round-and-Estimate-Numbers-7.5-3.png 507w, https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2020\/12\/Big-Ideas-Math-Answer-Key-Grade-3-Chapter-7-Round-and-Estimate-Numbers-7.5-3-300x66.png 300w\" sizes=\"(max-width: 507px) 100vw, 507px\" \/><\/p>\n<p>Answer:<br \/>\nOne way: Rounding numbers<br \/>\nNearest ten of 673= 670<br \/>\nNearest ten of 429= 430<br \/>\nDifference of Nearest ten of 673 and 429= 670 &#8211; 430 = 240.<br \/>\nAnother Way: Use compatible numbers.<br \/>\nCompatible number of 673 =675<br \/>\nCompatible number of 429=425<br \/>\nDifference of Compatible number of 673 and 429= 675 &#8211; 425 = 250.<br \/>\n<strong>Show and Grow<\/strong><\/p>\n<p>Question 1.<br \/>\nRound to the nearest ten to estimate the difference.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-10713\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2020\/12\/Big-Ideas-Math-Answer-Key-Grade-3-Chapter-7-Round-and-Estimate-Numbers-7.5-4.png\" alt=\"Big Ideas Math Answer Key Grade 3 Chapter 7 Round and Estimate Numbers 7.5 4\" width=\"230\" height=\"105\" \/><\/p>\n<p>Answer:<\/p>\n<p><a href=\"https:\/\/ccssmathanswers.com\/big-ideas-math-answers-grade-3-chapter-7\/7-5-round-number-show-and-grow\/\" rel=\"attachment wp-att-18513\"><img loading=\"lazy\" class=\"alignnone size-full wp-image-18513\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2020\/12\/7.5-round-number-show-and-grow.png\" alt=\"\" width=\"533\" height=\"87\" srcset=\"https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2020\/12\/7.5-round-number-show-and-grow.png 533w, https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2020\/12\/7.5-round-number-show-and-grow-300x49.png 300w\" sizes=\"(max-width: 533px) 100vw, 533px\" \/><\/a><br \/>\nNearest Ten of 72= 70.<\/p>\n<p><a href=\"https:\/\/ccssmathanswers.com\/big-ideas-math-answers-grade-3-chapter-7\/7-5-round-number-show-and-grow-2\/\" rel=\"attachment wp-att-18514\"><img loading=\"lazy\" class=\"alignnone size-full wp-image-18514\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2020\/12\/7.5-round-number-show-and-grow-1.png\" alt=\"\" width=\"553\" height=\"91\" srcset=\"https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2020\/12\/7.5-round-number-show-and-grow-1.png 553w, https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2020\/12\/7.5-round-number-show-and-grow-1-300x49.png 300w\" sizes=\"(max-width: 553px) 100vw, 553px\" \/><\/a><br \/>\nNearest Ten of 37= 40<br \/>\nDifference of Nearest Ten of 72 and 37= 70- 40 = 30.<\/p>\n<p>Question 2.<br \/>\nRound to the Nearest Hundred to estimate the difference.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-10714\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2020\/12\/Big-Ideas-Math-Answer-Key-Grade-3-Chapter-7-Round-and-Estimate-Numbers-7.5-5.png\" alt=\"Big Ideas Math Answer Key Grade 3 Chapter 7 Round and Estimate Numbers 7.5 5\" width=\"241\" height=\"105\" \/><\/p>\n<p>Answer:<br \/>\n<a href=\"https:\/\/ccssmathanswers.com\/big-ideas-math-answers-grade-3-chapter-7\/7-5-round-number-show-and-grow-3\/\" rel=\"attachment wp-att-18515\"><img loading=\"lazy\" class=\"alignnone size-full wp-image-18515\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2020\/12\/7.5-round-number-show-and-grow-2.png\" alt=\"\" width=\"535\" height=\"98\" srcset=\"https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2020\/12\/7.5-round-number-show-and-grow-2.png 535w, https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2020\/12\/7.5-round-number-show-and-grow-2-300x55.png 300w\" sizes=\"(max-width: 535px) 100vw, 535px\" \/><\/a><br \/>\nNearest Hundred of 586= 600.<\/p>\n<p><a href=\"https:\/\/ccssmathanswers.com\/big-ideas-math-answers-grade-3-chapter-7\/7-5-round-number-show-and-grow-4\/\" rel=\"attachment wp-att-18516\"><img loading=\"lazy\" class=\"alignnone size-full wp-image-18516\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2020\/12\/7.5-round-number-show-and-grow-3.png\" alt=\"\" width=\"590\" height=\"95\" srcset=\"https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2020\/12\/7.5-round-number-show-and-grow-3.png 590w, https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2020\/12\/7.5-round-number-show-and-grow-3-300x48.png 300w\" sizes=\"(max-width: 590px) 100vw, 590px\" \/><\/a><br \/>\nNearest Hundred of 314= 300<br \/>\nDifference of Nearest Ten of 586 and 314= 590- 310 = 280.<br \/>\n<strong>Use compatible numbers to estimate the difference<\/strong><\/p>\n<p>Question 3.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-10715\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2020\/12\/Big-Ideas-Math-Answer-Key-Grade-3-Chapter-7-Round-and-Estimate-Numbers-7.5-6.png\" alt=\"Big Ideas Math Answer Key Grade 3 Chapter 7 Round and Estimate Numbers 7.5 6\" width=\"224\" height=\"104\" \/><\/p>\n<p>Answer:<br \/>\nCompatible number of 95=100<br \/>\nCompatible number of 26= 25<br \/>\nDifference of Compatible Number of 95 and 26= 100 &#8211; 25 = 75.<\/p>\n<p>Question 4.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-10716\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2020\/12\/Big-Ideas-Math-Answer-Key-Grade-3-Chapter-7-Round-and-Estimate-Numbers-7.5-7.png\" alt=\"Big Ideas Math Answer Key Grade 3 Chapter 7 Round and Estimate Numbers 7.5 7\" width=\"249\" height=\"105\" \/><\/p>\n<p>Answer:<br \/>\nCompatible number of 768=775<br \/>\nCompatible number of 273= 270<br \/>\nDifference of Compatible Number of 768 and 273= 775 &#8211; 270 = 505.<br \/>\n<strong>Apply and Grow: Practice<\/strong><br \/>\n<strong>Round to the nearest ten to estimate the difference.<\/strong><\/p>\n<p>Question 5.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-10717\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2020\/12\/Big-Ideas-Math-Answer-Key-Grade-3-Chapter-7-Round-and-Estimate-Numbers-7.5-8.png\" alt=\"Big Ideas Math Answer Key Grade 3 Chapter 7 Round and Estimate Numbers 7.5 8\" width=\"172\" height=\"111\" \/><\/p>\n<p>Answer:<br \/>\n<a href=\"https:\/\/ccssmathanswers.com\/big-ideas-math-answers-grade-3-chapter-7\/7-5-round-number-show-and-grow-5\/\" rel=\"attachment wp-att-18519\"><img loading=\"lazy\" class=\"alignnone size-full wp-image-18519\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2020\/12\/7.5-round-number-show-and-grow-4.png\" alt=\"\" width=\"608\" height=\"104\" srcset=\"https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2020\/12\/7.5-round-number-show-and-grow-4.png 608w, https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2020\/12\/7.5-round-number-show-and-grow-4-300x51.png 300w\" sizes=\"(max-width: 608px) 100vw, 608px\" \/><\/a><\/p>\n<p>Nearest Ten of 556=560.<\/p>\n<p><a href=\"https:\/\/ccssmathanswers.com\/big-ideas-math-answers-grade-3-chapter-7\/7-5-round-number-show-and-grow-6\/\" rel=\"attachment wp-att-18520\"><img loading=\"lazy\" class=\"alignnone size-full wp-image-18520\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2020\/12\/7.5-round-number-show-and-grow-5.png\" alt=\"\" width=\"551\" height=\"102\" srcset=\"https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2020\/12\/7.5-round-number-show-and-grow-5.png 551w, https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2020\/12\/7.5-round-number-show-and-grow-5-300x56.png 300w\" sizes=\"(max-width: 551px) 100vw, 551px\" \/><\/a><br \/>\nNearest Ten of 129= 130<br \/>\nDifference of Nearest Ten of 556 and 129 = 560 &#8211; 130 = 430.<\/p>\n<p>Question 6.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-10718\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2020\/12\/Big-Ideas-Math-Answer-Key-Grade-3-Chapter-7-Round-and-Estimate-Numbers-7.5-9.png\" alt=\"Big Ideas Math Answer Key Grade 3 Chapter 7 Round and Estimate Numbers 7.5 9\" width=\"156\" height=\"114\" \/><\/p>\n<p>Answer:<br \/>\n<a href=\"https:\/\/ccssmathanswers.com\/big-ideas-math-answers-grade-3-chapter-7\/7-5-round-number-show-and-grow-7\/\" rel=\"attachment wp-att-18521\"><img loading=\"lazy\" class=\"alignnone size-full wp-image-18521\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2020\/12\/7.5-round-number-show-and-grow-6.png\" alt=\"\" width=\"581\" height=\"112\" srcset=\"https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2020\/12\/7.5-round-number-show-and-grow-6.png 581w, https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2020\/12\/7.5-round-number-show-and-grow-6-300x58.png 300w\" sizes=\"(max-width: 581px) 100vw, 581px\" \/><\/a><br \/>\nNearest Ten of 384=380.<br \/>\n<a href=\"https:\/\/ccssmathanswers.com\/big-ideas-math-answers-grade-3-chapter-7\/7-5-round-number-show-and-grow-8\/\" rel=\"attachment wp-att-18522\"><img loading=\"lazy\" class=\"alignnone size-full wp-image-18522\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2020\/12\/7.5-round-number-show-and-grow-7.png\" alt=\"\" width=\"594\" height=\"91\" srcset=\"https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2020\/12\/7.5-round-number-show-and-grow-7.png 594w, https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2020\/12\/7.5-round-number-show-and-grow-7-300x46.png 300w\" sizes=\"(max-width: 594px) 100vw, 594px\" \/><\/a><br \/>\nNearest Ten of 31= 30<br \/>\nDifference of Nearest Ten of 384 and 31 = 380 &#8211; 30 = 350.<\/p>\n<p>Question 7.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-10719\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2020\/12\/Big-Ideas-Math-Answer-Key-Grade-3-Chapter-7-Round-and-Estimate-Numbers-7.5-10.png\" alt=\"Big Ideas Math Answer Key Grade 3 Chapter 7 Round and Estimate Numbers 7.5 10\" width=\"177\" height=\"105\" \/><\/p>\n<p>Answer:<br \/>\n<a href=\"https:\/\/ccssmathanswers.com\/big-ideas-math-answers-grade-3-chapter-7\/7-5-round-number-show-and-grow-9\/\" rel=\"attachment wp-att-18523\"><img loading=\"lazy\" class=\"alignnone size-full wp-image-18523\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2020\/12\/7.5-round-number-show-and-grow-8.png\" alt=\"\" width=\"550\" height=\"107\" srcset=\"https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2020\/12\/7.5-round-number-show-and-grow-8.png 550w, https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2020\/12\/7.5-round-number-show-and-grow-8-300x58.png 300w\" sizes=\"(max-width: 550px) 100vw, 550px\" \/><\/a><br \/>\nNearest Ten of 702=700.<\/p>\n<p><a href=\"https:\/\/ccssmathanswers.com\/big-ideas-math-answers-grade-3-chapter-7\/7-5-round-number-show-and-grow-10\/\" rel=\"attachment wp-att-18524\"><img loading=\"lazy\" class=\"alignnone size-full wp-image-18524\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2020\/12\/7.5-round-number-show-and-grow-9.png\" alt=\"\" width=\"557\" height=\"94\" srcset=\"https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2020\/12\/7.5-round-number-show-and-grow-9.png 557w, https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2020\/12\/7.5-round-number-show-and-grow-9-300x51.png 300w\" sizes=\"(max-width: 557px) 100vw, 557px\" \/><\/a><br \/>\nNearest Ten of 428= 430<br \/>\nDifference of Nearest Ten of 702 and 428= 700 &#8211; 430 = 270.<br \/>\n<strong>Round to the nearest hundred to estimate the difference.<\/strong><\/p>\n<p>Question 8.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-10720\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2020\/12\/Big-Ideas-Math-Answer-Key-Grade-3-Chapter-7-Round-and-Estimate-Numbers-7.5-11.png\" alt=\"Big Ideas Math Answer Key Grade 3 Chapter 7 Round and Estimate Numbers 7.5 11\" width=\"163\" height=\"104\" \/><\/p>\n<p>Answer:<br \/>\n<a href=\"https:\/\/ccssmathanswers.com\/big-ideas-math-answers-grade-3-chapter-7\/7-5-round-number-show-and-grow-11\/\" rel=\"attachment wp-att-18525\"><img loading=\"lazy\" class=\"alignnone size-full wp-image-18525\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2020\/12\/7.5-round-number-show-and-grow-10.png\" alt=\"\" width=\"563\" height=\"82\" srcset=\"https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2020\/12\/7.5-round-number-show-and-grow-10.png 563w, https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2020\/12\/7.5-round-number-show-and-grow-10-300x44.png 300w\" sizes=\"(max-width: 563px) 100vw, 563px\" \/><\/a><br \/>\nNearest Hundred of 763=800.<\/p>\n<p><a href=\"https:\/\/ccssmathanswers.com\/big-ideas-math-answers-grade-3-chapter-7\/7-5-round-number-show-and-grow-12\/\" rel=\"attachment wp-att-18526\"><img loading=\"lazy\" class=\"alignnone size-full wp-image-18526\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2020\/12\/7.5-round-number-show-and-grow-11.png\" alt=\"\" width=\"543\" height=\"86\" srcset=\"https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2020\/12\/7.5-round-number-show-and-grow-11.png 543w, https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2020\/12\/7.5-round-number-show-and-grow-11-300x48.png 300w\" sizes=\"(max-width: 543px) 100vw, 543px\" \/><\/a><br \/>\nNearest Hundred of 98 =100<br \/>\nDifference of\u00a0 Nearest Hundred of 763 and 98= 800 &#8211; 100 =700.<\/p>\n<p>Question 9.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-10721\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2020\/12\/Big-Ideas-Math-Answer-Key-Grade-3-Chapter-7-Round-and-Estimate-Numbers-7.5-12.png\" alt=\"Big Ideas Math Answer Key Grade 3 Chapter 7 Round and Estimate Numbers 7.5 12\" width=\"163\" height=\"108\" \/><\/p>\n<p>Answer:<\/p>\n<p><a href=\"https:\/\/ccssmathanswers.com\/big-ideas-math-answers-grade-3-chapter-7\/7-5-round-number-show-and-grow-13\/\" rel=\"attachment wp-att-18527\"><img loading=\"lazy\" class=\"alignnone size-full wp-image-18527\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2020\/12\/7.5-round-number-show-and-grow-12.png\" alt=\"\" width=\"542\" height=\"92\" srcset=\"https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2020\/12\/7.5-round-number-show-and-grow-12.png 542w, https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2020\/12\/7.5-round-number-show-and-grow-12-300x51.png 300w\" sizes=\"(max-width: 542px) 100vw, 542px\" \/><\/a>Nearest Hundred of 901= 900<\/p>\n<p><a href=\"https:\/\/ccssmathanswers.com\/big-ideas-math-answers-grade-3-chapter-7\/7-5-round-number-show-and-grow-14\/\" rel=\"attachment wp-att-18528\"><img loading=\"lazy\" class=\"alignnone size-full wp-image-18528\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2020\/12\/7.5-round-number-show-and-grow-13.png\" alt=\"\" width=\"576\" height=\"81\" srcset=\"https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2020\/12\/7.5-round-number-show-and-grow-13.png 576w, https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2020\/12\/7.5-round-number-show-and-grow-13-300x42.png 300w\" sizes=\"(max-width: 576px) 100vw, 576px\" \/><\/a><\/p>\n<p>Nearest Hundred of 305 = 300<br \/>\nDifference of\u00a0 Nearest Hundred of 901 and 305= 900 &#8211; 300 = 600.<\/p>\n<p>Question 10.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-10722\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2020\/12\/Big-Ideas-Math-Answer-Key-Grade-3-Chapter-7-Round-and-Estimate-Numbers-7.5-13.png\" alt=\"Big Ideas Math Answer Key Grade 3 Chapter 7 Round and Estimate Numbers 7.5 13\" width=\"164\" height=\"104\" \/><\/p>\n<p>Answer:<br \/>\n<a href=\"https:\/\/ccssmathanswers.com\/big-ideas-math-answers-grade-3-chapter-7\/7-5-round-number-show-and-grow-15\/\" rel=\"attachment wp-att-18529\"><img loading=\"lazy\" class=\"alignnone size-full wp-image-18529\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2020\/12\/7.5-round-number-show-and-grow-14.png\" alt=\"\" width=\"539\" height=\"97\" srcset=\"https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2020\/12\/7.5-round-number-show-and-grow-14.png 539w, https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2020\/12\/7.5-round-number-show-and-grow-14-300x54.png 300w\" sizes=\"(max-width: 539px) 100vw, 539px\" \/><\/a><br \/>\nNearest Hundred of 875 = 900.<\/p>\n<p><a href=\"https:\/\/ccssmathanswers.com\/big-ideas-math-answers-grade-3-chapter-7\/7-5-round-number-show-and-grow-16\/\" rel=\"attachment wp-att-18530\"><img loading=\"lazy\" class=\"alignnone size-full wp-image-18530\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2020\/12\/7.5-round-number-show-and-grow-15.png\" alt=\"\" width=\"543\" height=\"79\" srcset=\"https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2020\/12\/7.5-round-number-show-and-grow-15.png 543w, https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2020\/12\/7.5-round-number-show-and-grow-15-300x44.png 300w\" sizes=\"(max-width: 543px) 100vw, 543px\" \/><\/a><br \/>\nNearest Hundred of 529 = 500<br \/>\nDifference of\u00a0 Nearest Hundred of 875 and 529 = 900 &#8211; 500 = 400.<br \/>\n<strong>Use compatible numbers to estimate the difference<\/strong><\/p>\n<p>Question 11.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-10723\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2020\/12\/Big-Ideas-Math-Answer-Key-Grade-3-Chapter-7-Round-and-Estimate-Numbers-7.5-14.png\" alt=\"Big Ideas Math Answer Key Grade 3 Chapter 7 Round and Estimate Numbers 7.5 14\" width=\"167\" height=\"99\" \/><\/p>\n<p>Answer:<br \/>\nCompatible Number of 985= 990<br \/>\nCompatible Number of 148=\u00a0 145<br \/>\nDifference of Compatible Number of 985 and 148= 990 &#8211; 145 = 845.<\/p>\n<p>Question 12.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-10724\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2020\/12\/Big-Ideas-Math-Answer-Key-Grade-3-Chapter-7-Round-and-Estimate-Numbers-7.5-15.png\" alt=\"Big Ideas Math Answer Key Grade 3 Chapter 7 Round and Estimate Numbers 7.5 15\" width=\"160\" height=\"102\" \/><\/p>\n<p>Answer:<br \/>\nCompatible Number of 676= 680<br \/>\nCompatible Number of 226= 255<br \/>\nDifference of Compatible Number of 676 and 226 = 680 &#8211; 255 = 455.<\/p>\n<p>Question 13.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-10725\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2020\/12\/Big-Ideas-Math-Answer-Key-Grade-3-Chapter-7-Round-and-Estimate-Numbers-7.5-16.png\" alt=\"Big Ideas Math Answer Key Grade 3 Chapter 7 Round and Estimate Numbers 7.5 16\" width=\"170\" height=\"107\" \/><\/p>\n<p>Answer:<br \/>\nCompatible Number of 549= 550<br \/>\nCompatible Number of 52=\u00a0 45<br \/>\nDifference of Compatible Number of 549 and 52 = 550 &#8211; 45 = 505.<br \/>\n<strong>Estimate the difference<\/strong><\/p>\n<p>Question 14.<br \/>\n455 &#8211; 221<br \/>\n____ &#8211; ____ = _____<\/p>\n<p>Answer:<br \/>\nDifference of 455 &#8211; 221 = 234.<\/p>\n<p>Question 15.<br \/>\n674 &#8211; 348<br \/>\n____ &#8211; ____ = ____<\/p>\n<p>Answer:<br \/>\nDifference of 674 &#8211; 348 =\u00a0 326.<\/p>\n<p>Question 16.<br \/>\n97 &#8211; 53<br \/>\n____ &#8211; _____ &#8211; _____<\/p>\n<p>Answer:<br \/>\nDifference of 97 &#8211; 53 = 44.<\/p>\n<p>Question 17.<br \/>\n<strong>DIG DEEPER!<\/strong><br \/>\nWrite a subtraction problem using 2 three-digit numbers that have an estimated difference of 200.<\/p>\n<p>Answer: A Fruit seller has 469 mangoes with him on Monday. On Tuesday he finds 269 mangoes got rotten. How many are left out with him on Tuesday?<\/p>\n<p>Question 18.<br \/>\n<strong>Structure<\/strong><br \/>\nDid Descartes round to the nearest ten or to the nearest hundred to estimate the difference?<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-10726\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2020\/12\/Big-Ideas-Math-Answer-Key-Grade-3-Chapter-7-Round-and-Estimate-Numbers-7.5-17.png\" alt=\"Big Ideas Math Answer Key Grade 3 Chapter 7 Round and Estimate Numbers 7.5 17\" width=\"196\" height=\"183\" \/><\/p>\n<p>Answer:<br \/>\nGiven: 407 &#8211; 302 = 100<br \/>\n<a href=\"https:\/\/ccssmathanswers.com\/big-ideas-math-answers-grade-3-chapter-7\/7-5-round-number-show-and-grow-29\/\" rel=\"attachment wp-att-18546\"><img loading=\"lazy\" class=\"alignnone size-full wp-image-18546\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2020\/12\/7.5-round-number-show-and-grow-28.png\" alt=\"\" width=\"539\" height=\"85\" srcset=\"https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2020\/12\/7.5-round-number-show-and-grow-28.png 539w, https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2020\/12\/7.5-round-number-show-and-grow-28-300x47.png 300w\" sizes=\"(max-width: 539px) 100vw, 539px\" \/><\/a><br \/>\nNearest Ten of 407= 410<\/p>\n<p><a href=\"https:\/\/ccssmathanswers.com\/big-ideas-math-answers-grade-3-chapter-7\/7-5-round-number-show-and-grow-30\/\" rel=\"attachment wp-att-18547\"><img loading=\"lazy\" class=\"alignnone size-full wp-image-18547\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2020\/12\/7.5-round-number-show-and-grow-29.png\" alt=\"\" width=\"528\" height=\"70\" srcset=\"https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2020\/12\/7.5-round-number-show-and-grow-29.png 528w, https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2020\/12\/7.5-round-number-show-and-grow-29-300x40.png 300w\" sizes=\"(max-width: 528px) 100vw, 528px\" \/><\/a><br \/>\nNearest Ten of 302= 300<br \/>\nDifference of Nearest Ten of 407 and 302= 410 &#8211; 300 = 110.<br \/>\n<a href=\"https:\/\/ccssmathanswers.com\/big-ideas-math-answers-grade-3-chapter-7\/7-5-round-number-show-and-grow-31\/\" rel=\"attachment wp-att-18548\"><img loading=\"lazy\" class=\"alignnone size-full wp-image-18548\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2020\/12\/7.5-round-number-show-and-grow-30.png\" alt=\"\" width=\"575\" height=\"88\" srcset=\"https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2020\/12\/7.5-round-number-show-and-grow-30.png 575w, https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2020\/12\/7.5-round-number-show-and-grow-30-300x46.png 300w\" sizes=\"(max-width: 575px) 100vw, 575px\" \/><\/a><br \/>\nNearest Hundred of 407=400<br \/>\n<a href=\"https:\/\/ccssmathanswers.com\/big-ideas-math-answers-grade-3-chapter-7\/7-5-round-number-show-and-grow-32\/\" rel=\"attachment wp-att-18549\"><img loading=\"lazy\" class=\"alignnone size-full wp-image-18549\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2020\/12\/7.5-round-number-show-and-grow-31.png\" alt=\"\" width=\"524\" height=\"100\" srcset=\"https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2020\/12\/7.5-round-number-show-and-grow-31.png 524w, https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2020\/12\/7.5-round-number-show-and-grow-31-300x57.png 300w\" sizes=\"(max-width: 524px) 100vw, 524px\" \/><\/a><br \/>\nNearest Hundred of 302= 300<br \/>\nDifference of Nearest Hundred of 407 and 302= 400 &#8211; 300 = 100<br \/>\nTherefore, Descartes rounds to the nearest hundred of 407 and 302.<br \/>\n<strong>Think and Grow: Modeling Real Life<\/strong><br \/>\nThe diagram shows the numbers of days it takes four planets to orbit the Sun. About how many more days does it take Mars to orbit the Sun than Venus?<br \/>\nEstimate:<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-10727\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2020\/12\/Big-Ideas-Math-Answer-Key-Grade-3-Chapter-7-Round-and-Estimate-Numbers-7.5-18.png\" alt=\"Big Ideas Math Answer Key Grade 3 Chapter 7 Round and Estimate Numbers 7.5 18\" width=\"436\" height=\"174\" srcset=\"https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2020\/12\/Big-Ideas-Math-Answer-Key-Grade-3-Chapter-7-Round-and-Estimate-Numbers-7.5-18.png 436w, https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2020\/12\/Big-Ideas-Math-Answer-Key-Grade-3-Chapter-7-Round-and-Estimate-Numbers-7.5-18-300x120.png 300w\" sizes=\"(max-width: 436px) 100vw, 436px\" \/><br \/>\nIt takes Mars about _____ more days than Venus.<\/p>\n<p>Answer:<br \/>\nNumber of days Mars to orbit the sun= 687 days<br \/>\nNumber of days Venus to orbit the sun= 225 days<\/p>\n<p>Number of more days it takes Mars to orbit the Sun than Venus= 687 &#8211; 225 = 462 days.<\/p>\n<p><strong>Show and Grow<\/strong><\/p>\n<p>Question 19.<br \/>\nUse the diagram above to find about how many more days it takes Earth to orbit the Sun than Mercury.<\/p>\n<p>Answer:<br \/>\nNumber of days Earth to orbit the sun = 365 days<br \/>\nNumber of days Mercury to orbit the sun = 88 days<br \/>\nNumber of more days it takes Earth to orbit the Sun than Mercury= 365 &#8211; 88 = 277 days.<\/p>\n<p>Question 20.<br \/>\nYour school gym can seat 500 people on one side and 350 people on the other side. There are 459 people in their seats. About how many more people can be seated in the gym?<\/p>\n<p>Answer:<br \/>\nNumber of people seating on one side in the gym = 500<br \/>\nNumber of people seating on other side in the gym = 350<br \/>\nTotal number of seats in the gym = 500 + 350 = 850<br \/>\nNumber of people occupied in the seats in the gym = 459<br \/>\nNumber of more people can be seated in the gym = total seats &#8211; seats occupied = 850 &#8211; 459 =\u00a0 391 seats.<\/p>\n<p>Question 21.<br \/>\nA bus is traveling 876 miles from Raleigh to New Orleans. The bus travels 264 miles in the morning and 327 miles in the afternoon. About how many more miles does the bus have left to travel? Explain.<\/p>\n<p>Answer:<br \/>\nThe distance the bus traveled from Raleigh to New Orleans = 876 miles<br \/>\nThe distance the bus traveled in the morning = 264 miles<br \/>\nThe distance the bus traveled in the afternoon = 327 miles<br \/>\nTotal distance covered by the bus in the morning and afternoon= 264 miles+ 327 miles = 591 miles<br \/>\nThe number of more miles the bus has left to travel = 876 miles &#8211; 591 miles = 285 miles.<\/p>\n<h3><a id=\"Estimate_differences_Homework_&amp;_Practice_7.5\"><\/a>Estimate Differences Homework &amp; Practice 7.5<\/h3>\n<p><strong>Round to the nearest ten to estimate the difference.<\/strong><\/p>\n<p>Question 1.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-10728\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2020\/12\/Big-Ideas-Math-Answer-Key-Grade-3-Chapter-7-Round-and-Estimate-Numbers-7.5-19.png\" alt=\"Big Ideas Math Answer Key Grade 3 Chapter 7 Round and Estimate Numbers 7.5 19\" width=\"154\" height=\"113\" \/><\/p>\n<p>Answer:<\/p>\n<p><a href=\"https:\/\/ccssmathanswers.com\/?attachment_id=18531\" rel=\"attachment wp-att-18531\"><img loading=\"lazy\" class=\"alignnone size-full wp-image-18531\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2020\/12\/7.5-round-number-show-and-grow-16.png\" alt=\"\" width=\"532\" height=\"80\" srcset=\"https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2020\/12\/7.5-round-number-show-and-grow-16.png 532w, https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2020\/12\/7.5-round-number-show-and-grow-16-300x45.png 300w\" sizes=\"(max-width: 532px) 100vw, 532px\" \/><\/a><br \/>\nNearest Ten of 847= 850<\/p>\n<p><a href=\"https:\/\/ccssmathanswers.com\/big-ideas-math-answers-grade-3-chapter-7\/7-5-round-number-show-and-grow-18\/\" rel=\"attachment wp-att-18532\"><img loading=\"lazy\" class=\"alignnone size-full wp-image-18532\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2020\/12\/7.5-round-number-show-and-grow-17.png\" alt=\"\" width=\"536\" height=\"94\" srcset=\"https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2020\/12\/7.5-round-number-show-and-grow-17.png 536w, https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2020\/12\/7.5-round-number-show-and-grow-17-300x53.png 300w\" sizes=\"(max-width: 536px) 100vw, 536px\" \/><\/a><br \/>\nNearest Ten of 468= 470<br \/>\nDifference of Nearest Ten of 847 and 468= 850 &#8211; 470= 380.<\/p>\n<p>Question 2.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-10729\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2020\/12\/Big-Ideas-Math-Answer-Key-Grade-3-Chapter-7-Round-and-Estimate-Numbers-7.5-20.png\" alt=\"Big Ideas Math Answer Key Grade 3 Chapter 7 Round and Estimate Numbers 7.5 20\" width=\"169\" height=\"111\" \/><\/p>\n<p>Answer:<\/p>\n<p><a href=\"https:\/\/ccssmathanswers.com\/big-ideas-math-answers-grade-3-chapter-7\/7-5-round-number-show-and-grow-19\/\" rel=\"attachment wp-att-18533\"><img loading=\"lazy\" class=\"alignnone size-full wp-image-18533\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2020\/12\/7.5-round-number-show-and-grow-18.png\" alt=\"\" width=\"540\" height=\"67\" srcset=\"https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2020\/12\/7.5-round-number-show-and-grow-18.png 540w, https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2020\/12\/7.5-round-number-show-and-grow-18-300x37.png 300w\" sizes=\"(max-width: 540px) 100vw, 540px\" \/><\/a><br \/>\nNearest Ten of 153=\u00a0 150<br \/>\n<a href=\"https:\/\/ccssmathanswers.com\/big-ideas-math-answers-grade-3-chapter-7\/7-5-round-number-show-and-grow-20\/\" rel=\"attachment wp-att-18534\"><img loading=\"lazy\" class=\"alignnone size-full wp-image-18534\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2020\/12\/7.5-round-number-show-and-grow-19.png\" alt=\"\" width=\"530\" height=\"82\" srcset=\"https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2020\/12\/7.5-round-number-show-and-grow-19.png 530w, https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2020\/12\/7.5-round-number-show-and-grow-19-300x46.png 300w\" sizes=\"(max-width: 530px) 100vw, 530px\" \/><\/a><br \/>\nNearest Ten of 129= 130<br \/>\nDifference of Nearest Ten of 153 and 129= 150 &#8211; 130 = 20.<\/p>\n<p>Question 3.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-10730\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2020\/12\/Big-Ideas-Math-Answer-Key-Grade-3-Chapter-7-Round-and-Estimate-Numbers-7.5-21.png\" alt=\"Big Ideas Math Answer Key Grade 3 Chapter 7 Round and Estimate Numbers 7.5 21\" width=\"161\" height=\"108\" \/><\/p>\n<p>Answer:<br \/>\n<a href=\"https:\/\/ccssmathanswers.com\/big-ideas-math-answers-grade-3-chapter-7\/7-5-round-number-show-and-grow-21\/\" rel=\"attachment wp-att-18535\"><img loading=\"lazy\" class=\"alignnone size-full wp-image-18535\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2020\/12\/7.5-round-number-show-and-grow-20.png\" alt=\"\" width=\"545\" height=\"101\" srcset=\"https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2020\/12\/7.5-round-number-show-and-grow-20.png 545w, https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2020\/12\/7.5-round-number-show-and-grow-20-300x56.png 300w\" sizes=\"(max-width: 545px) 100vw, 545px\" \/><\/a><br \/>\nNearest Ten of 34= 30<br \/>\n<a href=\"https:\/\/ccssmathanswers.com\/big-ideas-math-answers-grade-3-chapter-7\/7-5-round-number-show-and-grow-22\/\" rel=\"attachment wp-att-18536\"><img loading=\"lazy\" class=\"alignnone size-full wp-image-18536\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2020\/12\/7.5-round-number-show-and-grow-21.png\" alt=\"\" width=\"541\" height=\"98\" srcset=\"https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2020\/12\/7.5-round-number-show-and-grow-21.png 541w, https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2020\/12\/7.5-round-number-show-and-grow-21-300x54.png 300w\" sizes=\"(max-width: 541px) 100vw, 541px\" \/><\/a><br \/>\nNearest Ten of 21= 20<br \/>\nDifference of Nearest Ten of 34 and 21 = 30 &#8211; 20= 10.<br \/>\n<strong>Round to the nearest hundred to estimate the difference.<\/strong><\/p>\n<p>Question 4.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-10731\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2020\/12\/Big-Ideas-Math-Answer-Key-Grade-3-Chapter-7-Round-and-Estimate-Numbers-7.5-22.png\" alt=\"Big Ideas Math Answer Key Grade 3 Chapter 7 Round and Estimate Numbers 7.5 22\" width=\"163\" height=\"113\" \/><\/p>\n<p>Answer:<br \/>\n<a href=\"https:\/\/ccssmathanswers.com\/big-ideas-math-answers-grade-3-chapter-7\/7-5-round-number-show-and-grow-23\/\" rel=\"attachment wp-att-18537\"><img loading=\"lazy\" class=\"alignnone size-full wp-image-18537\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2020\/12\/7.5-round-number-show-and-grow-22.png\" alt=\"\" width=\"526\" height=\"95\" srcset=\"https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2020\/12\/7.5-round-number-show-and-grow-22.png 526w, https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2020\/12\/7.5-round-number-show-and-grow-22-300x54.png 300w\" sizes=\"(max-width: 526px) 100vw, 526px\" \/><\/a><\/p>\n<p>Nearest Hundred of 598= 600<br \/>\n<a href=\"https:\/\/ccssmathanswers.com\/big-ideas-math-answers-grade-3-chapter-7\/7-5-round-number-show-and-grow-24\/\" rel=\"attachment wp-att-18538\"><img loading=\"lazy\" class=\"alignnone size-full wp-image-18538\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2020\/12\/7.5-round-number-show-and-grow-23.png\" alt=\"\" width=\"561\" height=\"95\" srcset=\"https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2020\/12\/7.5-round-number-show-and-grow-23.png 561w, https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2020\/12\/7.5-round-number-show-and-grow-23-300x51.png 300w\" sizes=\"(max-width: 561px) 100vw, 561px\" \/><\/a><br \/>\nNearest Hundred of 347= 350<br \/>\nDifference of Nearest Hundred of 598 and 347= 600\u00a0 &#8211; 350 = 250.<\/p>\n<p>Question 5.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-10732\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2020\/12\/Big-Ideas-Math-Answer-Key-Grade-3-Chapter-7-Round-and-Estimate-Numbers-7.5-23.png\" alt=\"Big Ideas Math Answer Key Grade 3 Chapter 7 Round and Estimate Numbers 7.5 23\" width=\"163\" height=\"109\" \/><\/p>\n<p>Answer:<\/p>\n<p><a href=\"https:\/\/ccssmathanswers.com\/big-ideas-math-answers-grade-3-chapter-7\/7-5-round-number-show-and-grow-25\/\" rel=\"attachment wp-att-18539\"><img loading=\"lazy\" class=\"alignnone size-full wp-image-18539\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2020\/12\/7.5-round-number-show-and-grow-24.png\" alt=\"\" width=\"535\" height=\"89\" srcset=\"https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2020\/12\/7.5-round-number-show-and-grow-24.png 535w, https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2020\/12\/7.5-round-number-show-and-grow-24-300x50.png 300w\" sizes=\"(max-width: 535px) 100vw, 535px\" \/><\/a><br \/>\nNearest Hundred of\u00a0 811 =800<br \/>\n<a href=\"https:\/\/ccssmathanswers.com\/big-ideas-math-answers-grade-3-chapter-7\/7-5-round-number-show-and-grow-26\/\" rel=\"attachment wp-att-18540\"><img loading=\"lazy\" class=\"alignnone size-full wp-image-18540\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2020\/12\/7.5-round-number-show-and-grow-25.png\" alt=\"\" width=\"542\" height=\"86\" srcset=\"https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2020\/12\/7.5-round-number-show-and-grow-25.png 542w, https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2020\/12\/7.5-round-number-show-and-grow-25-300x48.png 300w\" sizes=\"(max-width: 542px) 100vw, 542px\" \/><\/a><br \/>\nNearest Hundred of 67 = 100<br \/>\nDifference of Nearest Hundred of 811 and 67 = 800 &#8211; 100 =700.<\/p>\n<p>Question 6.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-10733\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2020\/12\/Big-Ideas-Math-Answer-Key-Grade-3-Chapter-7-Round-and-Estimate-Numbers-7.5-24.png\" alt=\"Big Ideas Math Answer Key Grade 3 Chapter 7 Round and Estimate Numbers 7.5 24\" width=\"170\" height=\"111\" \/><\/p>\n<p>Answer:<\/p>\n<p><a href=\"https:\/\/ccssmathanswers.com\/big-ideas-math-answers-grade-3-chapter-7\/7-5-round-number-show-and-grow-27\/\" rel=\"attachment wp-att-18541\"><img loading=\"lazy\" class=\"alignnone size-full wp-image-18541\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2020\/12\/7.5-round-number-show-and-grow-26.png\" alt=\"\" width=\"545\" height=\"96\" srcset=\"https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2020\/12\/7.5-round-number-show-and-grow-26.png 545w, https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2020\/12\/7.5-round-number-show-and-grow-26-300x53.png 300w\" sizes=\"(max-width: 545px) 100vw, 545px\" \/><\/a><br \/>\nNearest Hundred of 931 = 900<\/p>\n<p><a href=\"https:\/\/ccssmathanswers.com\/big-ideas-math-answers-grade-3-chapter-7\/7-5-round-number-show-and-grow-28\/\" rel=\"attachment wp-att-18542\"><img loading=\"lazy\" class=\"alignnone size-full wp-image-18542\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2020\/12\/7.5-round-number-show-and-grow-27.png\" alt=\"\" width=\"561\" height=\"84\" srcset=\"https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2020\/12\/7.5-round-number-show-and-grow-27.png 561w, https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2020\/12\/7.5-round-number-show-and-grow-27-300x45.png 300w\" sizes=\"(max-width: 561px) 100vw, 561px\" \/><\/a><br \/>\nNearest Hundred of 747 =700<br \/>\nDifference of Nearest Hundred of 931 and 747 = 900 &#8211; 700 = 200.<br \/>\n<strong>Use compatible numbers to estimate the difference<\/strong><\/p>\n<p>Question 7.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-10734\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2020\/12\/Big-Ideas-Math-Answer-Key-Grade-3-Chapter-7-Round-and-Estimate-Numbers-7.5-25.png\" alt=\"Big Ideas Math Answer Key Grade 3 Chapter 7 Round and Estimate Numbers 7.5 25\" width=\"149\" height=\"106\" \/><\/p>\n<p>Answer:<br \/>\nCompatible Number of 96 = 100<br \/>\nCompatible Number of 47 = 45<br \/>\nDifference of Compatible Number of 96 and 47= 100 &#8211; 45 = 65.<\/p>\n<p>Question 8.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-10735\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2020\/12\/Big-Ideas-Math-Answer-Key-Grade-3-Chapter-7-Round-and-Estimate-Numbers-7.5-26.png\" alt=\"Big Ideas Math Answer Key Grade 3 Chapter 7 Round and Estimate Numbers 7.5 26\" width=\"167\" height=\"104\" \/><\/p>\n<p>Answer:<br \/>\nCompatible Number of 678 = 685<br \/>\nCompatible Number of 142 = 135<br \/>\nDifference of Compatible Number of 678 and 142 = 685 &#8211; 135 = 550.<\/p>\n<p>Question 9.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-10736\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2020\/12\/Big-Ideas-Math-Answer-Key-Grade-3-Chapter-7-Round-and-Estimate-Numbers-7.5-27.png\" alt=\"Big Ideas Math Answer Key Grade 3 Chapter 7 Round and Estimate Numbers 7.5 27\" width=\"168\" height=\"108\" \/><\/p>\n<p>Answer:<br \/>\nCompatible Number of 746 = 755<br \/>\nCompatible Number of 51 = 45<br \/>\nDifference of Compatible Number of 746 and 51 = 755 &#8211; 45 = 715.<br \/>\n<strong>Estimate the difference.<br \/>\n<\/strong><br \/>\nQuestion 10.<br \/>\n258 &#8211; 205<br \/>\n___ &#8211; ____ = ____<\/p>\n<p>Answer:<br \/>\nDifference of 258 &#8211; 205 = 53.<\/p>\n<p>Question 11.<br \/>\n781 &#8211; 62<br \/>\n____ &#8211; ____ = ____<\/p>\n<p>Answer:<br \/>\nDifference of 781 &#8211; 62 = 719.<\/p>\n<p>Question 12.<br \/>\n914 &#8211; 522<br \/>\n____ &#8211; ____ = ____<\/p>\n<p>Answer:<br \/>\nDifference of 914 &#8211; 522 = 392.<\/p>\n<p>Question 13.<br \/>\n<strong>YOU BE THE TEACHER<\/strong><br \/>\nYour friend estimated the difference by rounding to the nearest hundred. Is your friend correct? Explain.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-10737\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2020\/12\/Big-Ideas-Math-Answer-Key-Grade-3-Chapter-7-Round-and-Estimate-Numbers-7.5-28.png\" alt=\"Big Ideas Math Answer Key Grade 3 Chapter 7 Round and Estimate Numbers 7.5 28\" width=\"192\" height=\"112\" \/><\/p>\n<p>Answer:<br \/>\nGiven:<br \/>\n<img src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2020\/12\/Big-Ideas-Math-Answer-Key-Grade-3-Chapter-7-Round-and-Estimate-Numbers-7.5-28.png\" alt=\"Big Ideas Math Answer Key Grade 3 Chapter 7 Round and Estimate Numbers 7.5 28\" \/><br \/>\nNearest Hundred of 649 = 600<br \/>\nNearest Hundred of 308 =\u00a0 300<br \/>\nDifference of Nearest Hundred of 649 and 308 = 600 &#8211; 300 = 300<br \/>\nMy friend&#8217;s value of the difference of Nearest Hundred of 649 and 308 is wrong because he has added the numbers instead of subtracting.<\/p>\n<p>Question 14.<br \/>\n<strong>Structure<\/strong><br \/>\nEstimate the difference of 581 &#8211; 213 in two different ways.<\/p>\n<p>Answer:<br \/>\nONE WAY: Rounding System<br \/>\nNearest Hundred of 581= 600<br \/>\nNearest Hundred of 213= 200<br \/>\nThe difference of Nearest Hundred of 581 and 213= 600 &#8211; 200 = 400.<br \/>\nOTHER WAY: Use Compatible Numbers<br \/>\nCompatible Number of 581= 575<br \/>\nCompatible Numbers of 213 = 220<br \/>\nDifference of Compatible Numbers of 581 and 213= 575 &#8211; 220 =\u00a0 355.<\/p>\n<p>Question 15.<br \/>\n<strong>Modeling Real Life<\/strong><br \/>\nA drama club sold 259 tickets for a school play. So far, 103 people have arrived for the play. About how many more people are expected to arrive?<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-10738\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2020\/12\/Big-Ideas-Math-Answer-Key-Grade-3-Chapter-7-Round-and-Estimate-Numbers-7.5-29.png\" alt=\"Big Ideas Math Answer Key Grade 3 Chapter 7 Round and Estimate Numbers 7.5 29\" width=\"182\" height=\"145\" \/><\/p>\n<p>Answer:<br \/>\nNumber of tickets sold for school play= 259<br \/>\nNumber of people arrived for the play = 103<br \/>\nNumber of people expected to arrive still = 259 &#8211; 103 = 156.<\/p>\n<p>Question 16.<br \/>\n<strong>Modeling Real Life<\/strong><br \/>\nConstruction workers are building an 800-foot tall building. They complete 76 feet one month and 195 feet the next month. About how many more feet do they have left to build?<\/p>\n<p>Answer:<br \/>\nThe total length of the foot ball building = 800 feet<br \/>\nNumber of feet workers completed in one month =76 feet<br \/>\nNumber of feet workers completed in next month = 195 feet<br \/>\nConstruction left out to build = Total -Completed work in one month &#8211; Completed work in next month<br \/>\n=800 &#8211; 76 &#8211; 195 = 529 feet.<\/p>\n<p><strong>Review &amp; Refresh<\/strong><\/p>\n<p>Question 17.<br \/>\nFind the area of the rectangle<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-10739\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2020\/12\/Big-Ideas-Math-Answer-Key-Grade-3-Chapter-7-Round-and-Estimate-Numbers-7.5-30.png\" alt=\"Big Ideas Math Answer Key Grade 3 Chapter 7 Round and Estimate Numbers 7.5 30\" width=\"551\" height=\"72\" srcset=\"https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2020\/12\/Big-Ideas-Math-Answer-Key-Grade-3-Chapter-7-Round-and-Estimate-Numbers-7.5-30.png 551w, https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2020\/12\/Big-Ideas-Math-Answer-Key-Grade-3-Chapter-7-Round-and-Estimate-Numbers-7.5-30-300x39.png 300w\" sizes=\"(max-width: 551px) 100vw, 551px\" \/><\/p>\n<p>Answer:<br \/>\nGiven: Length of Rectangle= 10 m<br \/>\nBreath of Rectangle= 2 m<br \/>\nArea of Rectangle= Length x Breath = 10 m X 2 m = 20 square metres.<\/p>\n<h3><a id=\"Round_and_Estimate_Numbers_Performance_Task\"><\/a>Round and Estimate Numbers Performance Task<\/h3>\n<p>Question 1.<br \/>\nThe table shows the number of photos a photographer takes each day.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-10740\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2020\/12\/Big-Ideas-Math-Answers-3rd-Grade-Chapter-7-Round-and-Estimate-Numbers-1.png\" alt=\"Big Ideas Math Answers 3rd Grade Chapter 7 Round and Estimate Numbers 1\" width=\"207\" height=\"196\" \/><br \/>\na. About how many more photos does the photographer take on Saturday than Sunday?<br \/>\nb.Estimate the total number of photos taken all four days.<br \/>\nc.Is the actual number of photos more than or less than your estimate from above? Explain.<br \/>\nd.The photographer\u2019s camera can store 700 photos. About how many more photos can the photographer take?<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-10741\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2020\/12\/Big-Ideas-Math-Answers-3rd-Grade-Chapter-7-Round-and-Estimate-Numbers-2.png\" alt=\"Big Ideas Math Answers 3rd Grade Chapter 7 Round and Estimate Numbers 2\" width=\"158\" height=\"107\" \/><br \/>\ne. The photographer gives you all of the photos. You put some photos in an album. You have 453 photos left. How many photos are in your album?<br \/>\nf. Your album has 10 pages. You put an equal number of photos on each page. How many photos are on each page?<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-10742\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2020\/12\/Big-Ideas-Math-Answers-3rd-Grade-Chapter-7-Round-and-Estimate-Numbers-3.png\" alt=\"Big Ideas Math Answers 3rd Grade Chapter 7 Round and Estimate Numbers 3\" width=\"231\" height=\"151\" \/><\/p>\n<p>Answer:<br \/>\n<img src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2020\/12\/Big-Ideas-Math-Answers-3rd-Grade-Chapter-7-Round-and-Estimate-Numbers-1.png\" alt=\"Big Ideas Math Answers 3rd Grade Chapter 7 Round and Estimate Numbers 1\" \/><br \/>\na) Photos taken on Saturday by the photographer = 221<br \/>\nPhotos taken on Sunday by the photographer = 91<\/p>\n<p>Difference of photos taken on Saturday than on Sunday by the photographer= 221 &#8211; 91 = 130.<br \/>\nb)\u00a0Photos taken on Thursday by the photographer = 157<br \/>\nPhotos taken on Friday by the photographer = 104<br \/>\nPhotos taken on Saturday by the photographer = 221<br \/>\nPhotos taken on Sunday by the photographer = 91<\/p>\n<p>Total Number of photos taken by the photographer in all four days= 157+104+221+91 =\u00a0 573.<br \/>\nc)Actual total number of photos the album holds =700<br \/>\nTotal photos were taken by the photographer = 573<br \/>\nThe actual total number of photos is greater than the total estimated photos taken by the photographer.<br \/>\nd)Actual number of photos taken =573<br \/>\nTotal number of photos camera can hold = 700<br \/>\nNumber of more photos can the photographer take= 700 &#8211; 573 = 127.<br \/>\ne) Total number of photos given to me by the photographer = 573<br \/>\nNumber of photos left with me = 453<br \/>\nNumber of photos are in your album = 573 &#8211; 453 = 120.<br \/>\nf) Number of pages the album has = 10 pages<br \/>\nTotal number of photos album holds = 700<br \/>\nNumber of photos on each page= 700 <a href=\"https:\/\/ccssmathanswers.com\/?attachment_id=17819\" rel=\"attachment wp-att-17819\"><img loading=\"lazy\" class=\"alignnone size-full wp-image-17819\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2020\/12\/7.1-practice-ans-3.jpg\" alt=\"\" width=\"18\" height=\"20\" \/><\/a> 10 =70 pages.<\/p>\n<h3><a id=\"Round_and_Estimate_Numbers_Activity\"><\/a>Round and Estimate Numbers Activity<\/h3>\n<p><strong>Round to Find a Pearl<\/strong><br \/>\n<strong>Directions:<\/strong><br \/>\n1.Players take turns rolling a die.<br \/>\n2.On your turn, move your piece the number of spaces shown on the die. If the space is purple, then round the number to the nearest ten. If the space is green, then round the number to the nearest hundred.<br \/>\n3.Find the rounded number on a pearl and cover it with a counter.<br \/>\n4.Repeat this process until all of the pearls are covered.The player who covers the most pearls wins<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-10743\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2020\/12\/Big-Ideas-Math-Answers-3rd-Grade-Chapter-7-Round-and-Estimate-Numbers-4.png\" alt=\"Big Ideas Math Answers 3rd Grade Chapter 7 Round and Estimate Numbers 4\" width=\"692\" height=\"723\" srcset=\"https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2020\/12\/Big-Ideas-Math-Answers-3rd-Grade-Chapter-7-Round-and-Estimate-Numbers-4.png 692w, https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2020\/12\/Big-Ideas-Math-Answers-3rd-Grade-Chapter-7-Round-and-Estimate-Numbers-4-287x300.png 287w\" sizes=\"(max-width: 692px) 100vw, 692px\" \/><\/p>\n<h3><a id=\"Round_and_Estimate_Numbers_Chapter_Practice\"><\/a>Round and Estimate Numbers Chapter Practice<\/h3>\n<p><strong>7.1 Place Value<\/strong><br \/>\n<strong>Circle the value of the underlined digit.<\/strong><\/p>\n<p>Question<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-10744\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2020\/12\/Big-Ideas-Math-Answers-Grade-3-Chapter-7-Round-and-Estimate-Numbers-chp-1.png\" alt=\"Big Ideas Math Answers Grade 3 Chapter 7 Round and Estimate Numbers chp 1\" width=\"647\" height=\"101\" srcset=\"https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2020\/12\/Big-Ideas-Math-Answers-Grade-3-Chapter-7-Round-and-Estimate-Numbers-chp-1.png 647w, https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2020\/12\/Big-Ideas-Math-Answers-Grade-3-Chapter-7-Round-and-Estimate-Numbers-chp-1-300x47.png 300w\" sizes=\"(max-width: 647px) 100vw, 647px\" \/><\/p>\n<p>Answer:<br \/>\n<a href=\"https:\/\/ccssmathanswers.com\/big-ideas-math-answers-grade-3-chapter-7\/7-5-round-number-show-and-grow-45\/\" rel=\"attachment wp-att-18564\"><img loading=\"lazy\" class=\"alignnone size-full wp-image-18564\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2020\/12\/7.5-round-number-show-and-grow-44.png\" alt=\"\" width=\"309\" height=\"275\" srcset=\"https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2020\/12\/7.5-round-number-show-and-grow-44.png 309w, https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2020\/12\/7.5-round-number-show-and-grow-44-300x267.png 300w\" sizes=\"(max-width: 309px) 100vw, 309px\" \/><\/a><a href=\"https:\/\/ccssmathanswers.com\/big-ideas-math-answers-grade-3-chapter-7\/7-5-round-number-show-and-grow-46\/\" rel=\"attachment wp-att-18565\"><img loading=\"lazy\" class=\"alignnone size-full wp-image-18565\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2020\/12\/7.5-round-number-show-and-grow-45.png\" alt=\"\" width=\"287\" height=\"251\" \/><\/a><br \/>\n<a href=\"https:\/\/ccssmathanswers.com\/big-ideas-math-answers-grade-3-chapter-7\/7-1-practice-ans\/\" rel=\"attachment wp-att-17816\"><img loading=\"lazy\" class=\"alignnone size-full wp-image-17816\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2020\/12\/7.1-practice-ans.jpg\" alt=\"\" width=\"637\" height=\"128\" srcset=\"https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2020\/12\/7.1-practice-ans.jpg 637w, https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2020\/12\/7.1-practice-ans-300x60.jpg 300w\" sizes=\"(max-width: 637px) 100vw, 637px\" \/><\/a><br \/>\n<strong>Identify the value of each digit.<\/strong><\/p>\n<p>Question 3.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-10745\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2020\/12\/Big-Ideas-Math-Answers-Grade-3-Chapter-7-Round-and-Estimate-Numbers-chp-3.png\" alt=\"Big Ideas Math Answers Grade 3 Chapter 7 Round and Estimate Numbers chp 3\" width=\"259\" height=\"152\" \/><\/p>\n<p>Answer:<br \/>\n<a href=\"https:\/\/ccssmathanswers.com\/big-ideas-math-answers-grade-3-chapter-7\/7-1-practice-ans-2\/\" rel=\"attachment wp-att-17817\"><img loading=\"lazy\" class=\"alignnone size-full wp-image-17817\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2020\/12\/7.1-practice-ans-1.jpg\" alt=\"\" width=\"218\" height=\"171\" \/><\/a><\/p>\n<p>Question 4.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-10746\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2020\/12\/Big-Ideas-Math-Answers-Grade-3-Chapter-7-Round-and-Estimate-Numbers-chp-4.png\" alt=\"Big Ideas Math Answers Grade 3 Chapter 7 Round and Estimate Numbers chp 4\" width=\"264\" height=\"164\" \/><\/p>\n<p>Answer:<br \/>\n<a href=\"https:\/\/ccssmathanswers.com\/big-ideas-math-answers-grade-3-chapter-7\/7-1-practice-ans-3\/\" rel=\"attachment wp-att-17818\"><img loading=\"lazy\" class=\"alignnone size-full wp-image-17818\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2020\/12\/7.1-practice-ans-2.jpg\" alt=\"\" width=\"226\" height=\"183\" \/><\/a><br \/>\n<strong>7.2 Round Numbers Using a Number Line<\/strong><br \/>\n<strong>Round the number to the nearest ten and to the nearest hundred.<\/strong><\/p>\n<p>Question 5.<br \/>\n725<br \/>\nNearest ten: ____<br \/>\nNearest hundred: _____<\/p>\n<p>Answer:<br \/>\n<a href=\"https:\/\/ccssmathanswers.com\/big-ideas-math-answers-grade-3-chapter-7\/7-5-round-number-show-and-grow-39\/\" rel=\"attachment wp-att-18558\"><img loading=\"lazy\" class=\"alignnone size-full wp-image-18558\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2020\/12\/7.5-round-number-show-and-grow-38.png\" alt=\"\" width=\"560\" height=\"82\" srcset=\"https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2020\/12\/7.5-round-number-show-and-grow-38.png 560w, https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2020\/12\/7.5-round-number-show-and-grow-38-300x44.png 300w\" sizes=\"(max-width: 560px) 100vw, 560px\" \/><\/a><br \/>\nThe nearest Ten of 725 is 730.<br \/>\n<a href=\"https:\/\/ccssmathanswers.com\/big-ideas-math-answers-grade-3-chapter-7\/7-5-round-number-show-and-grow-40\/\" rel=\"attachment wp-att-18559\"><img loading=\"lazy\" class=\"alignnone size-full wp-image-18559\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2020\/12\/7.5-round-number-show-and-grow-39.png\" alt=\"\" width=\"555\" height=\"87\" srcset=\"https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2020\/12\/7.5-round-number-show-and-grow-39.png 555w, https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2020\/12\/7.5-round-number-show-and-grow-39-300x47.png 300w\" sizes=\"(max-width: 555px) 100vw, 555px\" \/><\/a><br \/>\nThe nearest Hundred of 725 is 700.<\/p>\n<p>Question 6.<br \/>\n34 Nearest ten: ______<br \/>\nNearest hundred: ______<\/p>\n<p>Answer:<br \/>\n<a href=\"https:\/\/ccssmathanswers.com\/big-ideas-math-answers-grade-3-chapter-7\/7-5-round-number-show-and-grow-41\/\" rel=\"attachment wp-att-18560\"><img loading=\"lazy\" class=\"alignnone size-full wp-image-18560\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2020\/12\/7.5-round-number-show-and-grow-40.png\" alt=\"\" width=\"543\" height=\"77\" srcset=\"https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2020\/12\/7.5-round-number-show-and-grow-40.png 543w, https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2020\/12\/7.5-round-number-show-and-grow-40-300x43.png 300w\" sizes=\"(max-width: 543px) 100vw, 543px\" \/><\/a><br \/>\nNearest Ten of 34 is 30.<br \/>\n<a href=\"https:\/\/ccssmathanswers.com\/big-ideas-math-answers-grade-3-chapter-7\/7-5-round-number-show-and-grow-42\/\" rel=\"attachment wp-att-18561\"><img loading=\"lazy\" class=\"alignnone size-full wp-image-18561\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2020\/12\/7.5-round-number-show-and-grow-41.png\" alt=\"\" width=\"558\" height=\"87\" srcset=\"https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2020\/12\/7.5-round-number-show-and-grow-41.png 558w, https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2020\/12\/7.5-round-number-show-and-grow-41-300x47.png 300w\" sizes=\"(max-width: 558px) 100vw, 558px\" \/><\/a><br \/>\nNearest Hundred of 34 is 0.<br \/>\n<strong>7.3 Round Numbers Using Place Value<\/strong><br \/>\n<strong>Round the number to the nearest ten and to the nearest hundred.<\/strong><\/p>\n<p>Question 7.<br \/>\n247<br \/>\nNearest ten: ____<br \/>\nNearest hundred: _____<\/p>\n<p>Answer:<br \/>\n<a href=\"https:\/\/ccssmathanswers.com\/big-ideas-math-answers-grade-3-chapter-7\/7-5-round-number-show-and-grow-37\/\" rel=\"attachment wp-att-18556\"><img loading=\"lazy\" class=\"alignnone size-full wp-image-18556\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2020\/12\/7.5-round-number-show-and-grow-36.png\" alt=\"\" width=\"542\" height=\"80\" srcset=\"https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2020\/12\/7.5-round-number-show-and-grow-36.png 542w, https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2020\/12\/7.5-round-number-show-and-grow-36-300x44.png 300w\" sizes=\"(max-width: 542px) 100vw, 542px\" \/><\/a><br \/>\nNearest Ten of 247 is 250.<br \/>\n<a href=\"https:\/\/ccssmathanswers.com\/big-ideas-math-answers-grade-3-chapter-7\/7-5-round-number-show-and-grow-38\/\" rel=\"attachment wp-att-18557\"><img loading=\"lazy\" class=\"alignnone size-full wp-image-18557\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2020\/12\/7.5-round-number-show-and-grow-37.png\" alt=\"\" width=\"531\" height=\"78\" srcset=\"https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2020\/12\/7.5-round-number-show-and-grow-37.png 531w, https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2020\/12\/7.5-round-number-show-and-grow-37-300x44.png 300w\" sizes=\"(max-width: 531px) 100vw, 531px\" \/><\/a><br \/>\nNearest Hundred of 247 is 200.<\/p>\n<p>Question 8.<br \/>\n571<br \/>\nNearest ten: ____<br \/>\nNearest hundred: _____<\/p>\n<p>Answer:<br \/>\n<a href=\"https:\/\/ccssmathanswers.com\/big-ideas-math-answers-grade-3-chapter-7\/7-5-round-number-show-and-grow-43\/\" rel=\"attachment wp-att-18562\"><img loading=\"lazy\" class=\"alignnone size-full wp-image-18562\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2020\/12\/7.5-round-number-show-and-grow-42.png\" alt=\"\" width=\"550\" height=\"80\" srcset=\"https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2020\/12\/7.5-round-number-show-and-grow-42.png 550w, https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2020\/12\/7.5-round-number-show-and-grow-42-300x44.png 300w\" sizes=\"(max-width: 550px) 100vw, 550px\" \/><\/a><br \/>\nThe nearest Ten of 571 is\u00a0 570.<br \/>\n<a href=\"https:\/\/ccssmathanswers.com\/big-ideas-math-answers-grade-3-chapter-7\/7-5-round-number-show-and-grow-44\/\" rel=\"attachment wp-att-18563\"><img loading=\"lazy\" class=\"alignnone size-full wp-image-18563\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2020\/12\/7.5-round-number-show-and-grow-43.png\" alt=\"\" width=\"547\" height=\"87\" srcset=\"https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2020\/12\/7.5-round-number-show-and-grow-43.png 547w, https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2020\/12\/7.5-round-number-show-and-grow-43-300x48.png 300w\" sizes=\"(max-width: 547px) 100vw, 547px\" \/><\/a><br \/>\nThe nearest Hundred of 571 is 600.<\/p>\n<p>Question 9.<br \/>\n86<br \/>\nNearest ten: ____<br \/>\nNearest hundred: _____<\/p>\n<p>Answer:<br \/>\n<a href=\"https:\/\/ccssmathanswers.com\/big-ideas-math-answers-grade-3-chapter-7\/7-5-round-number-show-and-grow-35\/\" rel=\"attachment wp-att-18553\"><img loading=\"lazy\" class=\"alignnone size-full wp-image-18553\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2020\/12\/7.5-round-number-show-and-grow-34.png\" alt=\"\" width=\"542\" height=\"89\" srcset=\"https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2020\/12\/7.5-round-number-show-and-grow-34.png 542w, https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2020\/12\/7.5-round-number-show-and-grow-34-300x49.png 300w\" sizes=\"(max-width: 542px) 100vw, 542px\" \/><\/a><br \/>\nNearest Ten of\u00a0 86 is 90<br \/>\n<a href=\"https:\/\/ccssmathanswers.com\/big-ideas-math-answers-grade-3-chapter-7\/7-5-round-number-show-and-grow-36\/\" rel=\"attachment wp-att-18554\"><img loading=\"lazy\" class=\"alignnone size-full wp-image-18554\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2020\/12\/7.5-round-number-show-and-grow-35.png\" alt=\"\" width=\"525\" height=\"79\" srcset=\"https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2020\/12\/7.5-round-number-show-and-grow-35.png 525w, https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2020\/12\/7.5-round-number-show-and-grow-35-300x45.png 300w\" sizes=\"(max-width: 525px) 100vw, 525px\" \/><\/a><br \/>\nThe nearest Hundred of 86 is 100.<\/p>\n<p>Question 4.<br \/>\nNumber Sense<br \/>\nDescartes rounds 742 to 700. To what place does he round?<\/p>\n<p>Answer:<br \/>\n<a href=\"https:\/\/ccssmathanswers.com\/big-ideas-math-answers-grade-3-chapter-7\/7-5-round-number-show-and-grow-33\/\" rel=\"attachment wp-att-18551\"><img loading=\"lazy\" class=\"alignnone size-full wp-image-18551\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2020\/12\/7.5-round-number-show-and-grow-32.png\" alt=\"\" width=\"576\" height=\"100\" srcset=\"https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2020\/12\/7.5-round-number-show-and-grow-32.png 576w, https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2020\/12\/7.5-round-number-show-and-grow-32-300x52.png 300w\" sizes=\"(max-width: 576px) 100vw, 576px\" \/><\/a><br \/>\nNearest Ten of 742 is 740<br \/>\n<a href=\"https:\/\/ccssmathanswers.com\/big-ideas-math-answers-grade-3-chapter-7\/7-5-round-number-show-and-grow-34\/\" rel=\"attachment wp-att-18552\"><img loading=\"lazy\" class=\"alignnone size-full wp-image-18552\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2020\/12\/7.5-round-number-show-and-grow-33.png\" alt=\"\" width=\"523\" height=\"111\" srcset=\"https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2020\/12\/7.5-round-number-show-and-grow-33.png 523w, https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2020\/12\/7.5-round-number-show-and-grow-33-300x64.png 300w\" sizes=\"(max-width: 523px) 100vw, 523px\" \/><\/a><br \/>\nThe nearest Hundred of 742 is 700.<br \/>\nDescartes rounds 742 to its Nearest Hundred.<br \/>\n<strong>7.4 Estimate Sums<\/strong><br \/>\n<strong>Estimate the sum<\/strong><\/p>\n<p>Question 11.<br \/>\n33 + 59<br \/>\n___ + ____ = ___<\/p>\n<p>Answer:<br \/>\nSum of 33 + 59 = 92.<\/p>\n<p>Question 12.<br \/>\n124 + 477<br \/>\n____ + ____ = ____<\/p>\n<p>Answer:<br \/>\nSum of\u00a0 124 + 477 = 601.<\/p>\n<p>Question 13.<br \/>\n122 + 181<br \/>\n____ + ____ = ____<\/p>\n<p>Answer:<br \/>\nSum of 122 + 181 = 303.<br \/>\n<strong>7.5 Estimate Differences<\/strong><br \/>\n<strong>Estimate the difference<\/strong><\/p>\n<p>Question 14.<br \/>\n692 &#8211; 71<br \/>\n___ &#8211; ____ = _____<\/p>\n<p>Answer:<br \/>\nDifference of 692 &#8211; 71 = 621<\/p>\n<p>Question 15.<br \/>\n478 &#8211; 152<br \/>\n____ &#8211; ____ = ____<\/p>\n<p>Answer:<br \/>\nDifference of 478 &#8211; 152 = 326.<\/p>\n<p>Question 16.<br \/>\n537 &#8211; 409<br \/>\n____ &#8211; ____ = _____<\/p>\n<p>Answer:<br \/>\nDifference of 537 &#8211; 409 = 128.<\/p>\n<p>Question 17.<br \/>\nModeling Real Life<br \/>\nA killer whale is 312 inches long. A striped dolphin is 102 inches long. About how much longer is the killer whale than the striped dolphin?<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-10747\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2020\/12\/Big-Ideas-Math-Answers-Grade-3-Chapter-7-Round-and-Estimate-Numbers-chp-17.png\" alt=\"Big Ideas Math Answers Grade 3 Chapter 7 Round and Estimate Numbers chp 17\" width=\"202\" height=\"130\" \/><\/p>\n<p>Answer:<br \/>\nLength of killer whale = 312 inches<br \/>\nLength of striped dolphin = 102 inches<br \/>\nThe difference in Length of the killer whales and striped dolphin = 312 inches &#8211; 102 inches = 210 inches.<\/p>\n<p><em>Final Words:<\/em><br \/>\nThe answers seen in this chapter are as per the latest edition. The Big Ideas Math Solutions are prepared by math experts so you don&#8217;t worry about the answers. I hope the details provided in Big Ideas Math Answers Grade 3 Chapter 7 Round and Estimate Numbers made you happy. Please share answers pdf with your friends and help them to overcome the difficulties of solving questions. Stay in touch with us to get answer keys for more chapters of grade 3.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Big Ideas Math Grade 3 Chapter 7 Round and Estimate Numbers Answers PDF link is available here. Students who have been looking for the solutions of BIM Book Grade 3 Chapter 7 can download the solution key provided in pdf format and begin preparation. This answer key is useful to complete the homework within time. &#8230; <a title=\"Big Ideas Math Answers Grade 3 Chapter 7 Round and Estimate Numbers\" class=\"read-more\" href=\"https:\/\/bigideasmathanswers.com\/big-ideas-math-answers-grade-3-chapter-7\/\" aria-label=\"More on Big Ideas Math Answers Grade 3 Chapter 7 Round and Estimate Numbers\">Read more<\/a><\/p>\n","protected":false},"author":9,"featured_media":89608,"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-3-Chapter-7.png","_links":{"self":[{"href":"https:\/\/bigideasmathanswers.com\/wp-json\/wp\/v2\/posts\/10630"}],"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=10630"}],"version-history":[{"count":1,"href":"https:\/\/bigideasmathanswers.com\/wp-json\/wp\/v2\/posts\/10630\/revisions"}],"predecessor-version":[{"id":90338,"href":"https:\/\/bigideasmathanswers.com\/wp-json\/wp\/v2\/posts\/10630\/revisions\/90338"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/bigideasmathanswers.com\/wp-json\/wp\/v2\/media\/89608"}],"wp:attachment":[{"href":"https:\/\/bigideasmathanswers.com\/wp-json\/wp\/v2\/media?parent=10630"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/bigideasmathanswers.com\/wp-json\/wp\/v2\/categories?post=10630"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/bigideasmathanswers.com\/wp-json\/wp\/v2\/tags?post=10630"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}