{"id":53,"date":"2022-03-28T12:01:11","date_gmt":"2022-03-28T06:31:11","guid":{"rendered":"https:\/\/ccssmathanswers.com\/?p=53"},"modified":"2022-04-07T14:26:57","modified_gmt":"2022-04-07T08:56:57","slug":"go-math-grade-3-answer-key-chapter-1-addition-and-subtraction-within-1000","status":"publish","type":"post","link":"https:\/\/bigideasmathanswers.com\/go-math-grade-3-answer-key-chapter-1-addition-and-subtraction-within-1000\/","title":{"rendered":"Go Math Grade 3 Answer Key Chapter 1 Addition and Subtraction within 1,000"},"content":{"rendered":"<p>Become a master in maths taking the help of Go Math Grade 3 Answer Key Chapter 1 Addition and Subtraction within 1000. Begin your preparation and learn all the fundamental topics in it. Solve all the Problems in Chapter 1 easily from here and understand the concept behind them. Download <a href=\"https:\/\/ccssmathanswers.com\/go-math-grade-3-answer-key\/\" target=\"_blank\" rel=\"noopener noreferrer\">Go Math Grade 3 Answer Key<\/a> Chapter 1 Addition and Subtraction within 1,000 free of cost and learn the fundamentals easily.<\/p>\n<h2>Go Math Grade 3 Answer Key Chapter 1 Addition and Subtraction within 1,000<\/h2>\n<p>You can make the most out of the Grade 3 Go Math Solutions Key Chapter 1 through the quick links available. Simply tap on the topic you want and learn various questions involved in it easily. There are different models in addition and subtraction. We have listed all of them by considering enough examples and explained every problem step by step.<\/p>\n<p><strong>Lesson 1: Number Patterns\u00a0<\/strong><\/p>\n<ul>\n<li><a href=\"#Number_Patterns_Page_No_9\">Lesson 1: Number Patterns \u2013 Page 9<\/a><\/li>\n<li><a href=\"#Number_Patterns_Lesson_Check_Page_No_10\">Lesson 1: Number Patterns Lesson Check &#8211; Page No 10<\/a><\/li>\n<\/ul>\n<p><strong>Lesson 2: Round to the Nearest Ten<\/strong><\/p>\n<ul>\n<li><a href=\"#Round_to_the_Nearest_Ten_Page_No_15\">Lesson 2: Round to the Nearest Ten &#8211; Page 15<\/a><\/li>\n<li><a href=\"#Round_to_the_Nearest_Ten_Lesson_Check_Page_No_16\">Lesson 2: Round to the Nearest Ten Lesson Check &#8211; Page No 16<\/a><\/li>\n<\/ul>\n<p><strong>Lesson 3: Estimate Sums<\/strong><\/p>\n<ul>\n<li><a href=\"#Estimate_Sums_Page_No_21\">Lesson 3: Estimate Sums &#8211; Page No &#8211; 21<\/a><\/li>\n<li><a href=\"#Estimate_Sums_Lesson_Check_Page_No_22\">Lesson 3 Estimate Sums Lesson Check &#8211; Page No &#8211; 22<\/a><\/li>\n<\/ul>\n<p><strong>Lesson 4: Mental Math Strategies for Addition<\/strong><\/p>\n<ul>\n<li><a href=\"#Mental_Math_Strategies_for_Addition_Page_No_27\">Lesson 4: Mental Math Strategies for Addition &#8211; Page No &#8211; 27<\/a><\/li>\n<li><a href=\"#Mental_Math_Strategies_for_Addition_Lesson_Check_Page_No_28\">Lesson 4: Mental Math Strategies for Addition Lesson Check &#8211; Page No &#8211; 28<\/a><\/li>\n<\/ul>\n<p><strong>Lesson 5: Use Properties to Add<\/strong><\/p>\n<ul>\n<li><a href=\"#Use_Properties_to_Add_Page_No_33\">Lesson 5: Use Properties to Add &#8211; Page No 33<\/a><\/li>\n<li><a href=\"#Use_Properties_to_Add_Lesson_Check_Page_No_34\">Lesson 5: Use Properties to Add Lesson Check &#8211; Page No 34<\/a><\/li>\n<\/ul>\n<p><strong>Lesson 6: Use the Break Apart Strategy to Add<\/strong><\/p>\n<ul>\n<li><a href=\"#Use_the_Break_Apart_Startegy_to_Add_Page_No_39\">Lesson 6: Use the Break Apart Strategy to Add &#8211; Page No 39<\/a><\/li>\n<li><a href=\"#Use_the_Break_Apart_Strategy_to_Add_Lesson_Check_Page_No_40\">Lesson 6: Use the Break Apart Strategy to Add Lesson Check &#8211; Page No 40<\/a><\/li>\n<\/ul>\n<p><strong>Lesson 7: Use Place Value to Add<\/strong><\/p>\n<ul>\n<li><a href=\"#Use_the_Place_Value_to_Add_Page_No_45\">Lesson 7: Use Place Value to Add &#8211; Page No 45<\/a><\/li>\n<li><a href=\"#Use_the_Place_Value_to_Add_Lesson_Check_Page_No_46\">Lesson 7: Use Place Value to Add Lesson Check &#8211; Page No 46<\/a><\/li>\n<\/ul>\n<p><strong>Mid Chapter Check Point<\/strong><\/p>\n<ul>\n<li><a href=\"#Mid_Chapter_Check_Point_Vocabulary_Page No_47\">Mid Chapter Check Point &#8211; Vocabulary &#8211; Page No 47<\/a><\/li>\n<li><a href=\"#Mid_Chapter_Check_Point_Vocabulary_Lesson_Check_Page No_48\">Mid Chapter Check Point &#8211; Vocabulary Lesson Check &#8211; Page No 48<\/a><\/li>\n<\/ul>\n<p><strong>Lesson 8: Estimate Differences<\/strong><\/p>\n<ul>\n<li><a href=\"#Estimate_Differences_Page No_53\">Lesson 8: Estimate Differences &#8211; Page No 53<\/a><\/li>\n<li><a href=\"#Estimate_Differences_Lesson_Check_Page No_54\">Lesson 8: Estimate Differences Lesson Check &#8211; Page No 54<\/a><\/li>\n<\/ul>\n<p><strong>Lesson 9: Mental Math Strategies for Subtraction<\/strong><\/p>\n<ul>\n<li><a href=\"#Mental_Math_Strategies_for_Subtraction _Page No_59\">Lesson 9: Mental Math Strategies for Subtraction &#8211; Page No &#8211; 59<\/a><\/li>\n<li><a href=\"#Mental_Math_Strategies_for_Subtraction _Lesson_Check_Page No_60\">Lesson 9: Mental Math Strategies for Subtraction Lesson Check &#8211; Page No &#8211; 60<\/a><\/li>\n<\/ul>\n<p><strong>Lesson 10: Use Place Value to Subtract<\/strong><\/p>\n<ul>\n<li><a href=\"#Use_Place_Value_to_Subtract_Page No_65\">Lesson 10: Use Place Value to Subtract &#8211; Page No 65<\/a><\/li>\n<li><a href=\"#Use_Place_Value_to_Subtract_Lesson_Check_Page No_66\">Lesson 10: Use Place Value to Subtract Lesson Check &#8211; Page No 66<\/a><\/li>\n<\/ul>\n<p><strong>Lesson 11: Combine Place Values to Subtract<\/strong><\/p>\n<ul>\n<li><a href=\"#Combine_Place_Values_to_Subtract_Page No_71\">Lesson 11: Combine Place Values to Subtract &#8211; Page No &#8211; 71<\/a><\/li>\n<li><a href=\"#Combine_Place_Values_to_Subtract_Lesson_Check_Page No_72\">Lesson 11: Combine Place Values to Subtract Lesson Check &#8211; Page No 72<\/a><\/li>\n<\/ul>\n<p><strong>Lesson 12: Problem Solving \u2022 Model Addition and Subtraction<\/strong><\/p>\n<ul>\n<li><a href=\"#Problem_Solving_Model_Addition_and_Subtraction_Page No_77\">Lesson 12: Problem Solving \u2022 Model Addition and Subtraction Page No &#8211; 77<\/a><\/li>\n<li><a href=\"#Problem_Solving_Model_Addition_and_Subtraction_Lesson_Check_Page No_78\">Lesson 12: Problem Solving \u2022 Model Addition and Subtraction Lesson Check &#8211; Page No &#8211; 78<\/a><\/li>\n<\/ul>\n<p><strong>Review\/Test<\/strong><\/p>\n<ul>\n<li><a href=\"#Review_Test_Page No_79\">Review\/Test &#8211; Page No &#8211; 79<\/a><\/li>\n<li><a href=\"#&lt;a id=&quot;Review_Test_Page No_80&quot;&gt;&lt;\/a&gt;\">Review\/Test &#8211; Page No &#8211; 80<\/a><\/li>\n<li><a href=\"#Review_Test_Page No_81\">Review\/Test &#8211; Page No &#8211; 81<\/a><\/li>\n<li><a href=\"#&lt;a id=&quot;Review_Test_Page No_82&quot;&gt;&lt;\/a&gt;\">Review\/Test &#8211; Page No &#8211; 82<\/a><\/li>\n<li><a href=\"#Review_Test_Page No_83\">Review\/Test &#8211; Page No &#8211; 83<\/a><\/li>\n<li><a href=\"#Review_Test_Page No_84\">Review\/Test &#8211; Page No &#8211; 84<\/a><\/li>\n<\/ul>\n<h3><a id=\"Number_Patterns_Page_No_9\"><\/a>Number Patterns &#8211; Page No. 9<\/h3>\n<p>Find the sum. Then use the Commutative Property of Addition to write the related addition sentence.<br \/>\nQuestion 1:<br \/>\n9 + 2 =\u00a0<span style=\"text-decoration: underline;\"> 11\u00a0<\/span><\/p>\n<p>Answer:<\/p>\n<p>What is the commutative property of addition?<br \/>\nTo \u201ccommute\u201d means to move around or travel.<br \/>\nAccording to the commutative property of addition, changing the order of the numbers we are adding, does not change the sum.<br \/>\nif you are adding nine and two together, the commutative property of addition says that you will get the same answer whether you are adding<br \/>\n9 + 2 or 2 + 9.<br \/>\n2 + 9 =\u00a0<span style=\"text-decoration: underline;\"> 11\u00a0<\/span><\/p>\n<p>Question 2:<br \/>\n4 + 7 =\u00a0<span style=\"text-decoration: underline;\"><br \/>\n<\/span><span style=\"text-decoration: underline;\">\u00a0 \u00a0<\/span> + <span style=\"text-decoration: underline;\">\u00a0 \u00a0\u00a0<\/span> =\u00a0 11<\/p>\n<p>Answer:<\/p>\n<p>If you are adding four and seven together, the commutative property of addition says that you will get the same answer whether you are adding 4 + 7 or 7 + 4.<br \/>\n4 + 7 =\u00a0<span style=\"text-decoration: underline;\"> 11<br \/>\n<\/span><span style=\"text-decoration: underline;\">7 <\/span>\u00a0+ <span style=\"text-decoration: underline;\">\u00a04\u00a0<\/span> =\u00a0 11<\/p>\n<p>Question 3:<br \/>\n3 + 6 = <span style=\"text-decoration: underline;\"><br \/>\n<\/span><span style=\"text-decoration: underline;\">\u00a0 \u00a0\u00a0<\/span> + <span style=\"text-decoration: underline;\">\u00a0 \u00a0\u00a0<\/span> =\u00a0 11<\/p>\n<p>Answer:<\/p>\n<p>According to the commutative property of addition, changing the order of the numbers we are adding, does not change the sum.<br \/>\nThere will be no change in the sum whether you add 3 + 6 or 6 + 3.<br \/>\n3 + 6 =\u00a0<span style=\"text-decoration: underline;\"> 9<br \/>\n<\/span><span style=\"text-decoration: underline;\">\u00a06 <\/span>\u00a0+ <span style=\"text-decoration: underline;\">\u00a03\u00a0<\/span> =\u00a0 9<\/p>\n<p>Question 4:<br \/>\n3 + 10 = <span style=\"text-decoration: underline;\"><br \/>\n<\/span><span style=\"text-decoration: underline;\">\u00a0 \u00a0\u00a0<\/span> + <span style=\"text-decoration: underline;\">\u00a0 \u00a0\u00a0<\/span> =\u00a0 11<\/p>\n<p>Answer:<\/p>\n<p>According to the commutative property of addition, changing the order of the numbers we are adding, does not change the sum.<br \/>\nThere will be no change in the sum whether you add 3 + 10 or 10 + 3 = 13.<br \/>\n3 + 10 =\u00a0<span style=\"text-decoration: underline;\"> 13<br \/>\n<\/span><span style=\"text-decoration: underline;\">\u00a010 <\/span>\u00a0+ <span style=\"text-decoration: underline;\">\u00a03\u00a0<\/span> =\u00a0 13<\/p>\n<p>Question 5:<br \/>\n6 + 7 = <span style=\"text-decoration: underline;\"><br \/>\n<\/span><span style=\"text-decoration: underline;\">\u00a0 \u00a0\u00a0<\/span> + <span style=\"text-decoration: underline;\">\u00a0 \u00a0\u00a0<\/span> =\u00a0 13<\/p>\n<p>Answer:<\/p>\n<p>According to the commutative property of addition, changing the order of the numbers we are adding, does not change the sum.<br \/>\nThere will be no change in the sum whether you add 6 + 7 or 7 + 6 = 13.<br \/>\n6 + 7 =\u00a0<span style=\"text-decoration: underline;\"> 13<br \/>\n<\/span><span style=\"text-decoration: underline;\">\u00a07 <\/span>\u00a0+ <span style=\"text-decoration: underline;\">\u00a06\u00a0<\/span> =\u00a0 13<\/p>\n<p>Question 6:<br \/>\n7 + 5 = <span style=\"text-decoration: underline;\"><br \/>\n<\/span><span style=\"text-decoration: underline;\">\u00a0 \u00a0\u00a0<\/span> + <span style=\"text-decoration: underline;\">\u00a0 \u00a0\u00a0<\/span> =\u00a0 12<\/p>\n<p>Answer:<\/p>\n<p>If you are adding five and seven together, the commutative property of addition says that you will get the same answer whether you are adding 7 + 5 or 5 + 7 = 12<br \/>\n7 + 5 =\u00a0<span style=\"text-decoration: underline;\"> 12<br \/>\n<\/span><span style=\"text-decoration: underline;\">\u00a05 <\/span>\u00a0+ <span style=\"text-decoration: underline;\">\u00a07\u00a0<\/span> =\u00a0 12<\/p>\n<p>Question 7:<br \/>\n8 + 9 = <span style=\"text-decoration: underline;\"><br \/>\n<\/span><span style=\"text-decoration: underline;\">\u00a0 \u00a0\u00a0<\/span> + <span style=\"text-decoration: underline;\">\u00a0 \u00a0\u00a0<\/span> =\u00a0 17<\/p>\n<p>Answer:<\/p>\n<p>If you are adding eight and nine together, the commutative property of addition says that you will get the same answer whether you are adding 8 + 9 or 9 + 8.<br \/>\n8 + 9 =\u00a0<span style=\"text-decoration: underline;\"> 17<br \/>\n<\/span><span style=\"text-decoration: underline;\">\u00a09 <\/span>\u00a0+ <span style=\"text-decoration: underline;\">\u00a08\u00a0<\/span> =\u00a0 17<\/p>\n<p>Question 8:<br \/>\n0 + 4 = <span style=\"text-decoration: underline;\"><br \/>\n<\/span><span style=\"text-decoration: underline;\">\u00a0 \u00a0\u00a0<\/span> + <span style=\"text-decoration: underline;\">\u00a0 \u00a0\u00a0<\/span> =\u00a0 4<\/p>\n<p>Answer:<\/p>\n<p>According to the commutative property of addition, changing the order of the numbers we are adding, does not change the sum.<br \/>\n0 + 4 =\u00a0<span style=\"text-decoration: underline;\"> 4<br \/>\n<\/span><span style=\"text-decoration: underline;\">\u00a04 <\/span>\u00a0+ <span style=\"text-decoration: underline;\">\u00a00\u00a0<\/span> =\u00a0 4<\/p>\n<p>Question 9:<br \/>\n9 + 6 = <span style=\"text-decoration: underline;\"><br \/>\n<\/span><span style=\"text-decoration: underline;\">\u00a0 \u00a0\u00a0<\/span> + <span style=\"text-decoration: underline;\">\u00a0 \u00a0\u00a0<\/span> =\u00a0 15<\/p>\n<p>Answer:<\/p>\n<p>According to the commutative property of addition, changing the order of the numbers we are adding, does not change the sum.<br \/>\nThere will be no change in the sum whether you add 9 + 6 or 6 + 9 = 15<br \/>\n9 + 6 =\u00a0<span style=\"text-decoration: underline;\"> 15<br \/>\n<\/span><span style=\"text-decoration: underline;\">\u00a06 <\/span>\u00a0+ <span style=\"text-decoration: underline;\">\u00a09\u00a0<\/span> =\u00a0 15<\/p>\n<p><em><strong>Is the sum even or odd? Write even or odd.<\/strong><\/em><\/p>\n<p><strong>Even Numbers<\/strong>:<\/p>\n<p>Any integer that can be divided exactly by 2 is an even number. The last digit is 0, 2, 4, 6 or 8<br \/>\nExample: \u221224, 0, 6 and 38 are all even numbers<\/p>\n<p><strong>Odd Numbers<\/strong>:<\/p>\n<p>Any integer that cannot be divided exactly by 2 is an odd number. The last digit is 1, 3, 5, 7 or 9<br \/>\nExample: \u22123, 1, 7 and 35 are all odd numbers<br \/>\nOdd numbers are in between the even numbers.<\/p>\n<p>Question 10:<br \/>\n5 + 2<\/p>\n<p>Answer:<\/p>\n<p>The sum of two odd numbers is an odd number.<br \/>\n5 + 2 = 7.<br \/>\n\u2234 7 is an odd number.<\/p>\n<p>Question 11:<br \/>\n6 + 4<\/p>\n<p>Answer:<\/p>\n<p>The sum of two even numbers is always an even number.<br \/>\n6 + 4 = 10.<br \/>\n\u2234 10 is an even number.<\/p>\n<p>Question 12:<br \/>\n1 + 0<\/p>\n<p>Answer:<br \/>\nThe Sum of any number with zero is always the same number.<br \/>\n1 + 0 = 1.<br \/>\n\u2234 1 is an odd number.<\/p>\n<p>Question 13:<br \/>\n5 + 5<\/p>\n<p>Answer:<br \/>\nAny integer that can be divided exactly by 2 is an even number.<br \/>\n5 + 5 = 10.<br \/>\n\u2234 10 is an even number.<\/p>\n<p>Question 14:<br \/>\n3 + 8<\/p>\n<p>Answer:<\/p>\n<p>The sum of an even and odd number is an odd number.<br \/>\n3 + 8 = 11.<br \/>\n\u2234 11 is an odd number.<\/p>\n<p>Question 15:<br \/>\n7 + 7<\/p>\n<p>Answer:<\/p>\n<p>7 + 7 = 14.<br \/>\n\u2234 14 is an even number.<\/p>\n<p>Question 16:<br \/>\nAda writes 10 + 8 = 18 on the board. Maria wants to use the Commutative Property of Addition to rewrite Ada\u2019s addition sentence. What number sentence should Maria write?<\/p>\n<p>Answer:<\/p>\n<p>According to the commutative property of addition, changing the order of the numbers we are adding, does not change the sum.<br \/>\nIf you are adding ten and eight together, the commutative property of addition says that you will get the same answer whether you are adding 10 + 8 or 8 + 10.<br \/>\nMaria should write 8 + 10 =18.<\/p>\n<p>Question 17:<br \/>\nJackson says he has an odd number of model cars. He has 6 cars on one shelf and 8 cars on another shelf. Is Jackson correct? Explain.<\/p>\n<p>Answer:<\/p>\n<p>Jackson has 6 cars on one shelf and 8 cars on another shelf, hence the total number of cars Jackson has = sum of the cars on both shelves = 6 + 8 = 14.<br \/>\n14 is an even number ends with &#8216;4&#8217; in the last digit.<br \/>\nGiven Statement is False, Jackson has an even number of model cars i.e. 14.<\/p>\n<h3><a id=\"Number_Patterns_Lesson_Check_Page_No_10\"><\/a>Number Patterns Lesson Check Page No 10<\/h3>\n<p>Question 1<br \/>\nMarvella says that the sum of her addends is odd. Which of the following could be Marvella\u2019s addition problem?<\/p>\n<p>Options:<br \/>\n(a) 5 + 3<br \/>\n(b) 9 + 7<br \/>\n(c) 2 + 8<br \/>\n(d) 5 + 6<\/p>\n<p>Answer:<\/p>\n<p>(a) 5 + 3 = 8 (Even Number)<br \/>\n(b) 9 + 7 = 16 (Even Number)<br \/>\n(c) 2 + 8 = 10 (Even Number)<br \/>\n(d) 5 + 6 = 11 (Odd Number)<\/p>\n<p>Option (d) is Correct.<\/p>\n<p>Question 2<br \/>\nWhich number sentence shows the Commutative Property of Addition?<br \/>\n3 + 9 = 12<\/p>\n<p>(a) 12 &#8211; 9 = 3<br \/>\n(b) 12 = 8 + 4<br \/>\n(c) 9 + 3 = 12<br \/>\n(d) 12 &#8211; 3 = 9<\/p>\n<p>Answer:<\/p>\n<p>3 + 9 = 12 and 9 + 3 = 12 are commutative.<br \/>\nOption (c) is correct.<\/p>\n<p>Spiral Review<br \/>\nQuestion 3<br \/>\nAmber has 2 quarters, a dime, and 3 pennies. How much money does Amber have?<\/p>\n<p>(a) 53 \u00a2<br \/>\n(b) 58 \u00a2<br \/>\n(c) 63 \u00a2<br \/>\n(d) 68 \u00a2<\/p>\n<p>Answer:<\/p>\n<p>Amber has<br \/>\n2 quarters = 2 x 25 = 50 \u00a2<br \/>\n1 dime = 10 \u00a2<br \/>\n3 pennies = 3 \u00a2<br \/>\n\u2234 Money does Amber have = 2 quarters + 1 dime + 3 pennies<br \/>\n= 50 \u00a2 + 10 \u00a2 + 3 \u00a2 = 63 \u00a2<br \/>\nOption (c) is correct.<\/p>\n<p>Question 4<br \/>\nJosh estimates the height of his desk. Which is the best estimate?<\/p>\n<p>(a) 1 foot<br \/>\n(b) 2 feet<br \/>\n(c) 5 feet<br \/>\n(d) 9 feet<\/p>\n<p>Answer:<\/p>\n<p>So, from the given choices, 2 feet or approximately 24 inches would be the most viable answer because most standard desks have a height around 28 inches to 30 inches. 1 foot is too low, while 5 feet and 9 feet are too high. Therefore, 3 to 4 feet would be the most perfect answer but since we have a limited number of options, the nearest reasonable estimate value would be 2 feet. The original numbers from a problem does not exceed in a reasonable estimate.<\/p>\n<p>Option (b) is correct.<\/p>\n<p><strong>Use the bar graph for 5\u20136.<\/strong><\/p>\n<p><img loading=\"lazy\" class=\"wp-image-75 size-full aligncenter\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2020\/06\/Go-Math-Grade-3-Answer-Key-Chapter-1-Number-Patterns-Page-10.jpg\" alt=\"Go Math Grade 3 Answer Key Chapter 1 Number Patterns Page 10\" width=\"387\" height=\"283\" srcset=\"https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2020\/06\/Go-Math-Grade-3-Answer-Key-Chapter-1-Number-Patterns-Page-10.jpg 387w, https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2020\/06\/Go-Math-Grade-3-Answer-Key-Chapter-1-Number-Patterns-Page-10-300x219.jpg 300w\" sizes=\"(max-width: 387px) 100vw, 387px\" \/><\/p>\n<p>Question 5<br \/>\nWho read the most books?<\/p>\n<p>(a) Alicia<br \/>\n(b) Bob<br \/>\n(c) Juan<br \/>\n(d) Maria<\/p>\n<p>Answer:<\/p>\n<p>The number of Books Read:<br \/>\nJuan &#8211; 6<br \/>\nBob &#8211; 2<br \/>\nMaria &#8211; 4<br \/>\nAlicia &#8211; 5<br \/>\nJuan Read the most books.<br \/>\nOption (c) is correct.<\/p>\n<p>Question 6<br \/>\nWho read 3 more books than Bob?<\/p>\n<p>(a) Alicia<br \/>\n(b) Juan<br \/>\n(c) Maria<br \/>\n(d) no one<\/p>\n<p>Answer:<\/p>\n<p>Alicia read 3 books.<br \/>\nOption (a) is correct.<\/p>\n<h3><a id=\"Round_to_the_Nearest_Ten_Page_No_15\"><\/a>Lesson 2: Round to the Nearest Ten Page 15<\/h3>\n<p><strong>Round to the Nearest Ten or Hundred<\/strong><\/p>\n<p>Locate and label 739 on the number line.<br \/>\nRound to the nearest hundred.<\/p>\n<p><img loading=\"lazy\" class=\"alignnone wp-image-88 size-full\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2020\/06\/Go-Math-Grade-3-Chapter-1-Round-to-the-Nearest-Ten-or-Hundred-Page-15-Answer-Key.jpg\" alt=\"Go Math Grade 3 Chapter 1 Round to the Nearest Ten or Hundred Page 15 Answer Key\" width=\"571\" height=\"71\" srcset=\"https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2020\/06\/Go-Math-Grade-3-Chapter-1-Round-to-the-Nearest-Ten-or-Hundred-Page-15-Answer-Key.jpg 571w, https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2020\/06\/Go-Math-Grade-3-Chapter-1-Round-to-the-Nearest-Ten-or-Hundred-Page-15-Answer-Key-300x37.jpg 300w\" sizes=\"(max-width: 571px) 100vw, 571px\" \/><\/p>\n<p>Question 1<\/p>\n<p>(i) 739 is between __ and __<\/p>\n<p>Answer:<\/p>\n<p>739 is between <span style=\"text-decoration: underline;\">700<\/span> and <span style=\"text-decoration: underline;\">800<\/span>.<\/p>\n<p>Question 2<\/p>\n<p>739 is closer to <span style=\"text-decoration: underline;\">\u00a0 \u00a0 \u00a0 <\/span>than it is to <span style=\"text-decoration: underline;\">\u00a0 \u00a0 \u00a0<\/span>.<\/p>\n<p>Answer:<\/p>\n<p>739 is closer to <span style=\"text-decoration: underline;\">\u00a0700 <\/span>than it is to <span style=\"text-decoration: underline;\">\u00a0800<\/span>.<\/p>\n<p><strong>Round to the nearest ten and hundred.<\/strong><\/p>\n<p><strong>Round to the nearest ten<\/strong><\/p>\n<p>Rounding Numbers to the nearest 10 means finding which 10 they are nearest to. For example, 68 rounded to the nearest 10 is 70.<\/p>\n<p><strong>Rule for rounding to the nearest 10<\/strong><\/p>\n<p>Look at the number in the one&#8217;s place and&#8230;<\/p>\n<p><img loading=\"lazy\" class=\"wp-image-104 size-full aligncenter\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2020\/06\/Rule-for-rounding-to-the-nearest-10.png\" alt=\"Rule for rounding to the nearest 10\" width=\"272\" height=\"54\" \/><\/p>\n<p>Work through the examples below that show rounding to the nearest 10.<\/p>\n<p><img loading=\"lazy\" class=\"wp-image-103 size-full aligncenter\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2020\/06\/Rounding-numbers-to-the-nearest-10.png\" alt=\"Rounding numbers to the nearest 10\" width=\"440\" height=\"371\" srcset=\"https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2020\/06\/Rounding-numbers-to-the-nearest-10.png 440w, https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2020\/06\/Rounding-numbers-to-the-nearest-10-300x253.png 300w\" sizes=\"(max-width: 440px) 100vw, 440px\" \/><\/p>\n<p><strong>Round to the nearest hundred<\/strong><\/p>\n<p>Rounding numbers to the nearest 100 means finding which 100 they are nearest to. For example, 680 rounded to the nearest 100 is 700.<\/p>\n<p><strong>Rule for rounding to the nearest 100<\/strong><\/p>\n<p>Look at the number in the tens&#8217; place and&#8230;<\/p>\n<p><img loading=\"lazy\" class=\"size-full wp-image-104 aligncenter\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2020\/06\/Rule-for-rounding-to-the-nearest-10.png\" alt=\"Rule for rounding to the nearest 10\" width=\"272\" height=\"54\" \/><\/p>\n<p>Work through the examples below that show rounding to the nearest 100.<\/p>\n<p><img loading=\"lazy\" class=\"wp-image-112 size-full aligncenter\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2020\/06\/Rounding-numbers-to-the-nearest-100.png\" alt=\"Rounding numbers to the nearest 100\" width=\"530\" height=\"400\" srcset=\"https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2020\/06\/Rounding-numbers-to-the-nearest-100.png 530w, https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2020\/06\/Rounding-numbers-to-the-nearest-100-300x226.png 300w\" sizes=\"(max-width: 530px) 100vw, 530px\" \/><\/p>\n<p>Question 3<br \/>\n739 rounded to the nearest hundred is<\/p>\n<p>Answer:<\/p>\n<p>Let&#8217;s round 739 to the nearest 100.<br \/>\nThe nearest 100&#8217;s on both sides of 739 are 700 and 800.<br \/>\n700 is the nearest 100 to 739.<br \/>\n\u2234 739 rounded to the nearest hundred is &#8216;700&#8217;<\/p>\n<p>Question 4<br \/>\n363<br \/>\nRound to nearest ten:\u00a0<span style=\"text-decoration: underline;\"><br \/>\n<\/span>Round to nearest hundred:\u00a0<span style=\"text-decoration: underline;\"> \u00a0 \u00a0\u00a0<\/span><\/p>\n<p>Answer:<\/p>\n<p>(i) Let&#8217;s round 363 to the nearest 10.<\/p>\n<p>The nearest 10&#8217;s on both sides of 363 are 360 and 370.<br \/>\n360 is the nearest 10 to 363.<br \/>\n\u2234 363 rounded to the nearest ten is &#8216;360&#8217;<br \/>\nRound to nearest ten: <span style=\"text-decoration: underline;\">360<\/span><\/p>\n<p>(ii) Let&#8217;s round 363 to the nearest 100.<\/p>\n<p>The nearest 100&#8217;s on both sides of 363 are 300 and 400.<br \/>\n400 is the nearest 100 to 363.<br \/>\n\u2234 363 rounded to the nearest hundred is &#8216;400&#8217;<br \/>\nRound to nearest hundred: <span style=\"text-decoration: underline;\">400<\/span><\/p>\n<p>Question 5<br \/>\n829<br \/>\nRound to nearest ten: <span style=\"text-decoration: underline;\"> \u00a0 \u00a0\u00a0<\/span><span style=\"text-decoration: underline;\"><br \/>\n<\/span>Round to nearest hundred:\u00a0<span style=\"text-decoration: underline;\"> \u00a0 \u00a0\u00a0<\/span><\/p>\n<p>Answer:<\/p>\n<p>(i) Lets round 829 to the nearest 10.<br \/>\nThe nearest 10&#8217;s on both sides of 829 is 820 and 830.<br \/>\nRound to nearest ten: <span style=\"text-decoration: underline;\">830<\/span><\/p>\n<p>(ii) Let&#8217;s round 829 to the nearest 100<br \/>\nThe nearest 100&#8217;s on both sides of 829 is 800 and 900.<br \/>\nThe number rounded to 829 nearest to 100 is 800.<br \/>\nRound to nearest hundred: <span style=\"text-decoration: underline;\">800<\/span><\/p>\n<p>Question 6<br \/>\n572<br \/>\nRound to nearest ten: <span style=\"text-decoration: underline;\"> \u00a0 \u00a0\u00a0<\/span><span style=\"text-decoration: underline;\"><br \/>\n<\/span>Round to nearest hundred:\u00a0<span style=\"text-decoration: underline;\"> \u00a0 \u00a0\u00a0<\/span><\/p>\n<p>Answer:<\/p>\n<p>(i) Lets round 572 to the nearest 10.<br \/>\nThe nearest 10&#8217;s on both sides of 572 is 560 and 570.<br \/>\nThe number rounded to 572 is 570.<br \/>\nRound to nearest ten: <span style=\"text-decoration: underline;\">570<\/span><\/p>\n<p>(ii) Let&#8217;s round 572 to the nearest 100<br \/>\nThe nearest 100&#8217;s on both sides of 572 is 500 and 600.<br \/>\nThe number rounded to 572 nearest to 100<br \/>\nRound to nearest hundred: <span style=\"text-decoration: underline;\">600<\/span><\/p>\n<p>Question 7<br \/>\n209<br \/>\nRound to nearest ten:\u00a0<span style=\"text-decoration: underline;\"><br \/>\n<\/span>Round to nearest hundred:\u00a0<span style=\"text-decoration: underline;\"> \u00a0 \u00a0\u00a0<\/span><\/p>\n<p>Answer:<\/p>\n<p>(i) Lets round 209 to the nearest 10.<br \/>\nThe nearest 10&#8217;s on both sides of 209 is 200 and 210.<br \/>\nThe number rounded to Round to nearest ten: <span style=\"text-decoration: underline;\">210<\/span><\/p>\n<p>(ii) Let&#8217;s round 209 to the nearest 100<br \/>\nThe nearest 100&#8217;s on both sides of 209 are 200 and 300.<br \/>\nThe number rounded to 209 nearest to 100 is 200.<br \/>\nRound to nearest hundred: <span style=\"text-decoration: underline;\">200<\/span><\/p>\n<p>Question 8<br \/>\n663<br \/>\nRound to nearest ten:\u00a0<span style=\"text-decoration: underline;\"><br \/>\n<\/span>Round to nearest hundred:\u00a0<span style=\"text-decoration: underline;\"> \u00a0 \u00a0\u00a0<\/span><\/p>\n<p>Answer:<\/p>\n<p>(i) Lets round 663 to the nearest 10.<br \/>\nThe nearest 10&#8217;s on both sides of 663 are 660 and 670.<br \/>\nRound to nearest ten: <span style=\"text-decoration: underline;\">660<\/span><\/p>\n<p>(ii) Let&#8217;s round 663 to the nearest 100<br \/>\nThe nearest 100&#8217;s on both sides of 663 are 600 and 700.<br \/>\nThe number rounded to 663 nearest to 100 is 700.<br \/>\nRound to nearest hundred:\u00a0<span style=\"text-decoration: underline;\">700<\/span><\/p>\n<p>Question 9<br \/>\n949<br \/>\nRound to nearest ten:\u00a0<span style=\"text-decoration: underline;\"><br \/>\n<\/span>Round to nearest hundred:\u00a0<span style=\"text-decoration: underline;\"> \u00a0 \u00a0\u00a0<\/span><\/p>\n<p>Answer:<\/p>\n<p>(i) Lets round 949 to the nearest 10.<br \/>\nThe nearest 10&#8217;s on both sides of 949 is 940 and 950.<br \/>\nRound to nearest ten: <span style=\"text-decoration: underline;\">950<\/span><\/p>\n<p>(ii) Let&#8217;s round 949 to the nearest 100<br \/>\nThe nearest 100&#8217;s on both sides of 949 are 900 and 1000.<br \/>\nThe number rounded to 949 nearest to 100 is 900.<br \/>\nRound to nearest hundred: <span style=\"text-decoration: underline;\">900<\/span><\/p>\n<p>Question 10<br \/>\n762<br \/>\nRound to nearest ten:\u00a0<span style=\"text-decoration: underline;\"><br \/>\n<\/span>Round to nearest hundred:\u00a0<span style=\"text-decoration: underline;\"> \u00a0 \u00a0\u00a0<\/span><\/p>\n<p>Answer:<\/p>\n<p>(i) Lets round 762 to the nearest 10.<br \/>\nThe nearest 10&#8217;s on both sides of 762 is 760 and 770.<br \/>\nRound to nearest ten:\u00a0<span style=\"text-decoration: underline;\"> 760<\/span><\/p>\n<p>(ii) Let&#8217;s round 762 to the nearest 100<br \/>\nThe nearest 100&#8217;s on both sides of 762 are 700 and 800.<br \/>\nThe number rounded to 762 nearest to 100 is 800.<br \/>\nRound to nearest hundred:\u00a0<span style=\"text-decoration: underline;\"> 800\u00a0<\/span><\/p>\n<p>Question 11<br \/>\n399<br \/>\nRound to nearest ten:\u00a0<span style=\"text-decoration: underline;\"><br \/>\n<\/span>Round to nearest hundred:\u00a0<span style=\"text-decoration: underline;\"> \u00a0 \u00a0\u00a0<\/span><\/p>\n<p>Answer:<\/p>\n<p>(i) Lets round 399 to the nearest 10.<br \/>\nThe nearest 10&#8217;s on both sides of 399 is 390 and 400.<br \/>\nRound to nearest ten: <span style=\"text-decoration: underline;\">400<br \/>\n<\/span><\/p>\n<p>(ii) Let&#8217;s round 399 to the nearest 100<br \/>\nThe nearest 100&#8217;s on both sides of 399 are 300 and 400.<br \/>\nThe number rounded to 399 nearest to 100 is 400<br \/>\nRound to nearest hundred: <span style=\"text-decoration: underline;\">400<\/span><\/p>\n<p>Question 12<br \/>\n402<br \/>\nRound to nearest ten:\u00a0<span style=\"text-decoration: underline;\"><br \/>\n<\/span>Round to nearest hundred:\u00a0<span style=\"text-decoration: underline;\"> \u00a0 \u00a0\u00a0<\/span><\/p>\n<p>Answer:<\/p>\n<p>(i) Lets round 402 to the nearest 10.<br \/>\nThe nearest 10&#8217;s on both sides of 402 is 400 and 410.<br \/>\nRound to nearest ten: <span style=\"text-decoration: underline;\">400<\/span><\/p>\n<p>(ii) Let&#8217;s round 402 to the nearest 100<br \/>\nThe nearest 100&#8217;s on both sides of 402 are 400 and 500.<br \/>\nThe number rounded to 402 nearest to 100 is 400.<br \/>\nRound to nearest hundred: <span style=\"text-decoration: underline;\">400<\/span><\/p>\n<p><em>Problem Solving<\/em><\/p>\n<p>Question 13<br \/>\nThe baby elephant weighs 435 pounds. What is its weight rounded to the nearest hundred pounds?<br \/>\n<span style=\"text-decoration: underline;\">\u00a0 \u00a0 \u00a0 \u00a0\u00a0<\/span> \u00a0pounds<\/p>\n<p>Answer:<\/p>\n<p>Let&#8217;s round 435 to the nearest hundred pounds.<br \/>\nThe nearest 100&#8217;s on both sides of 435 are 400 and 500.<br \/>\n400 is the nearest 100 to 435.<br \/>\n\u2234 435 rounded to the nearest hundred pounds is &#8216;400&#8217;<br \/>\nRound to nearest hundred: <span style=\"text-decoration: underline;\">400 pounds<\/span><\/p>\n<p>Question 14<br \/>\nJayce sold 218 cups of lemonade at his lemonade stand. What is 218 rounded to the nearest ten?<br \/>\n<span style=\"text-decoration: underline;\">\u00a0 \u00a0 \u00a0 \u00a0\u00a0<\/span> \u00a0cups<\/p>\n<p>Answer:<\/p>\n<p>Let&#8217;s round 218 to the nearest 10.<br \/>\nThe nearest 10&#8217;s on both sides of 218 are 210 and 220.<br \/>\n218 is the nearest 10 to 220.<br \/>\n\u2234 218 rounded to the nearest ten is &#8216;220&#8217;<br \/>\nRound to nearest ten: <span style=\"text-decoration: underline;\">220<\/span><\/p>\n<h3><a id=\"Round_to_the_Nearest_Ten_Lesson_Check_Page_No_16\"><\/a>Lesson 2: Round to the Nearest Ten Lesson Check Page No 16<\/h3>\n<p><em>Lesson Check<\/em><\/p>\n<p>Question 1<br \/>\nOne day, 758 people visited the Monkey House at the zoo. What is 758 rounded to the nearest hundred?<\/p>\n<p>(a) 700<br \/>\n(b) 760<br \/>\n(c) 800<br \/>\n(d) 860<\/p>\n<p>Answer:<br \/>\nLet&#8217;s round 758 to the nearest hundred.<br \/>\nThe nearest hundred on both sides is 700 and 800.<br \/>\n\u2234 758 rounded to the nearest hundred is 800.<br \/>\nSo, the answer is option C.<\/p>\n<p>Question 2<br \/>\nSami ordered 132 dresses for her store. What is 132 rounded to the nearest ten?<\/p>\n<p>(a) 100<br \/>\n(b) 130<br \/>\n(c) 140<br \/>\n(d) 200<\/p>\n<p>Answer:<br \/>\nLet&#8217;s round 132 to the nearest 10.<br \/>\nThe nearest 10&#8217;s on both sides of 132 are 130 and 140.<br \/>\n\u2234 132 rounded to the nearest ten is &#8216;130&#8217;<br \/>\n132 rounded to the nearest ten: <span style=\"text-decoration: underline;\">130<br \/>\n<\/span>Option B is the correct answer.<\/p>\n<p><em>Spiral Review<\/em><br \/>\nQuestion 3<br \/>\nWhich describes the number sentence?<br \/>\n6 + 0 = 6<\/p>\n<p>(a) Commutative Property of Addition<br \/>\n(b) Identity Property of Addition<br \/>\n(c) even + odd = odd<br \/>\n(d) odd + odd = odd<\/p>\n<p>Answer:<br \/>\nThe Identity Property of Zero, also called the Additive Identity Property, states that if you add 0 to any number, the result will be that number. Likewise, if you subtract 0 from any number, the result will be that number.<br \/>\n6 + 0 = 6<br \/>\n\u2234 Option B is the correct answer.<\/p>\n<p>Question 4<br \/>\nWhich has an even sum?<\/p>\n<p>(a) 7 + 4<br \/>\n(b) 2 + 6<br \/>\n(c) 5 + 4<br \/>\n(d) 3 + 2<\/p>\n<p>Answer:<br \/>\nThe sum of even numbers is always even.<br \/>\n(a) 7 + 4 = 11 is odd number<br \/>\n(b) 2 + 6 = 8 is even number<br \/>\n(c) 5 + 4 = 9 is odd number<br \/>\n(d) 3 + 2 = 5 is odd number<br \/>\nSo, the answer is option (b)<\/p>\n<p>Question 5<br \/>\nWhat name describes this shape?<\/p>\n<p><img loading=\"lazy\" class=\"alignnone size-full wp-image-3454\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2020\/06\/HMH-Go-Math-Answer-Key-Grade-3-Chapter-1-image_1.jpg\" alt=\"HMH Go Math Answer Key Grade 3 Chapter 1 image_1\" width=\"148\" height=\"83\" \/><\/p>\n<p>(a) cone<br \/>\n(b) cube<br \/>\n(c) rectangle<br \/>\n(d) triangle<\/p>\n<p>Answer: Triangle<br \/>\n\u2234 Option D is the correct answer.<\/p>\n<p>Question 6<br \/>\nWhat word describes the equal shares of the shape?<\/p>\n<p><img loading=\"lazy\" class=\"alignnone size-full wp-image-3455\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2020\/06\/Go-Math-Answer-Key-Grade-3-Chapter-1-image_2.jpg\" alt=\"Go Math Answer Key Grade 3 Chapter 1 image_2\" width=\"181\" height=\"83\" \/><\/p>\n<p>(a) wholes<br \/>\n(b) thirds<br \/>\n(c) halves<br \/>\n(d) fourths<\/p>\n<p>Answer:<br \/>\nThe rectangle is divided into 4 equal rectangles.<br \/>\nSo, the name for the equal shapes is fourths.<br \/>\n\u2234 The answer is option D.<\/p>\n<h3><a id=\"Estimate_Sums_Page_No_21\"><\/a>Estimate Sums Page No &#8211; 21<\/h3>\n<p><strong>Compatible Numbers:<\/strong><\/p>\n<p>Compatible numbers are the numbers that are easy to compute mentally and are close to the real numbers.<\/p>\n<p>Use rounding or compatible numbers to estimate the sum.<\/p>\n<p>Question 1<br \/>\n198 + 727 =\u00a0 <span style=\"text-decoration: underline;\">\u00a0 \u00a0 \u00a0 \u00a0<\/span><\/p>\n<p>Answer:<\/p>\n<p>200 +725 = 925<\/p>\n<p>Explanation:<\/p>\n<p>Step 1:<br \/>\nFirst round 198 to the nearest hundred.<br \/>\nThe number rounded to 198 nearest hundred is 200.<br \/>\nWrite zeros for the tens and ones digit.<\/p>\n<p>Step 2:<br \/>\nWrite the number closer to 727.<br \/>\nThe number closer to 727 is 725.<\/p>\n<p>Step 3:<br \/>\nNow find the sum of the rounded numbers.<br \/>\n200 + 725 = 925<\/p>\n<p>Question 2<br \/>\n87 + 34<\/p>\n<p>Estimate:<\/p>\n<p><span style=\"text-decoration: underline;\">\u00a0 \u00a0 \u00a0 \u00a0<\/span> \u00a0+<span style=\"text-decoration: underline;\">\u00a0 \u00a0 \u00a0 \u00a0<\/span> \u00a0= <span style=\"text-decoration: underline;\">\u00a0 \u00a0 \u00a0 \u00a0<\/span><\/p>\n<p>Answer: 90 + 30 = 120<\/p>\n<p>Explanation:<\/p>\n<p>Step 1:<br \/>\nFirst round 87 to the nearest ten.<br \/>\nThe number rounded to 87 nearest ten is 90.<br \/>\nWrite zeros for the ones digit.<\/p>\n<p>Step 2:<br \/>\nWrite the number closer to 34.<br \/>\nThe number closer to 34 is 30.<\/p>\n<p>Step 3:<br \/>\nNow find the sum of the rounded numbers.<br \/>\n90 + 30 = 120<\/p>\n<p>Question 3<br \/>\n222 + 203<\/p>\n<p>Estimate:<\/p>\n<p><span style=\"text-decoration: underline;\">\u00a0 \u00a0 \u00a0 \u00a0<\/span> \u00a0+<span style=\"text-decoration: underline;\">\u00a0 \u00a0 \u00a0 \u00a0<\/span> \u00a0= <span style=\"text-decoration: underline;\">\u00a0 \u00a0 \u00a0 \u00a0<\/span><\/p>\n<p>Answer: 200 +200 = 400<\/p>\n<p>Explanation:<\/p>\n<p>Step 1:<br \/>\nFirst round 222 to the nearest hundred.<br \/>\nThe number rounded to 222 nearest hundred is 200.<br \/>\nWrite zeros for the tens and ones digit.<\/p>\n<p>Step 2:<br \/>\nWrite the number closer to 203.<br \/>\nThe number closer to 203 is 200.<\/p>\n<p>Step 3:<br \/>\nNow find the sum of the rounded numbers.<br \/>\n200 + 200 = 400<br \/>\nThe estimated sum of 222 + 203 is 400.<\/p>\n<p>Question 4<br \/>\n52 + 39<\/p>\n<p>Estimate:<\/p>\n<p><span style=\"text-decoration: underline;\">\u00a0 \u00a0 \u00a0 \u00a0<\/span> \u00a0+<span style=\"text-decoration: underline;\">\u00a0 \u00a0 \u00a0 \u00a0<\/span> \u00a0= <span style=\"text-decoration: underline;\">\u00a0 \u00a0 \u00a0 \u00a0<\/span><\/p>\n<p>Answer: 50 + 40 = 90<\/p>\n<p>Explanation:<\/p>\n<p>Step 1:<br \/>\nFirst round 52 to the nearest ten.<br \/>\nThe number rounded to 52 nearest ten is 50.<br \/>\nWrite zeros for the ones digit.<\/p>\n<p>Step 2:<br \/>\nWrite the number closer to 39.<br \/>\nThe number closer to 39 is 40.<\/p>\n<p>Step 3:<br \/>\nNow find the sum of the rounded numbers.<br \/>\n50 + 40 = 90<\/p>\n<p>Question 5<br \/>\n256 + 321<\/p>\n<p>Estimate:<\/p>\n<p><span style=\"text-decoration: underline;\">\u00a0 \u00a0 \u00a0 \u00a0<\/span> \u00a0+<span style=\"text-decoration: underline;\">\u00a0 \u00a0 \u00a0 \u00a0<\/span> \u00a0= <span style=\"text-decoration: underline;\">\u00a0 \u00a0 \u00a0 \u00a0<\/span><\/p>\n<p>Answer: 250 + 325 = 575<\/p>\n<p>Explanation:<\/p>\n<p>Step 1:<br \/>\nFirst round 256 to the nearest ten.<br \/>\nThe number rounded to 256 nearest ten is 250.<br \/>\nWrite zeros for the ones digit.<\/p>\n<p>Step 2:<br \/>\nWrite the number closer to 321.<br \/>\nThe number closer to 321 is 325.<\/p>\n<p>Step 3:<br \/>\nNow find the sum of the rounded numbers.<br \/>\n250 + 325 = 575<br \/>\nThe estimated sum of 256 + 321 is 575.<\/p>\n<p>Question 6<br \/>\n302 + 412<\/p>\n<p>Estimate:<\/p>\n<p><span style=\"text-decoration: underline;\">\u00a0 \u00a0 \u00a0 \u00a0<\/span> \u00a0+<span style=\"text-decoration: underline;\">\u00a0 \u00a0 \u00a0 \u00a0<\/span> \u00a0= <span style=\"text-decoration: underline;\">\u00a0 \u00a0 \u00a0 \u00a0<\/span><\/p>\n<p>Answer: 300 + 400 = 700<\/p>\n<p>Step 1:<br \/>\nFirst round 302 to the nearest ten.<br \/>\nThe number rounded to 302 nearest ten is 300.<br \/>\nWrite zeros for the ones digit.<\/p>\n<p>Step 2:<br \/>\nWrite the number closer to 412.<br \/>\nThe number closer to 412 is 400.<\/p>\n<p>Step 3:<br \/>\nNow find the sum of the rounded numbers.<br \/>\n300 + 400 = 700<\/p>\n<p>Question 7<br \/>\n519 + 124<\/p>\n<p>Estimate:<\/p>\n<p><span style=\"text-decoration: underline;\">\u00a0 \u00a0 \u00a0 \u00a0<\/span> \u00a0+<span style=\"text-decoration: underline;\">\u00a0 \u00a0 \u00a0 \u00a0<\/span> \u00a0= <span style=\"text-decoration: underline;\">\u00a0 \u00a0 \u00a0 \u00a0<\/span><\/p>\n<p>Answer: 500 + 100 = 600<\/p>\n<p>Explanation:<\/p>\n<p>Step 1:<br \/>\nFirst round 519 to the nearest hundred.<br \/>\nThe number rounded to 519 nearest hundred is 500.<br \/>\nWrite zeros for the tens and ones digit.<\/p>\n<p>Step 2:<br \/>\nWrite the number closer to 124.<br \/>\nThe number closer to 124 is 100.<\/p>\n<p>Step 3:<br \/>\nNow find the sum of the rounded numbers.<br \/>\n500 + 100 = 600<br \/>\nThe estimated sum is 600.<\/p>\n<p>Question 8<br \/>\n790 + 112<\/p>\n<p>Estimate:<\/p>\n<p><span style=\"text-decoration: underline;\">\u00a0 \u00a0 \u00a0 \u00a0<\/span> \u00a0+<span style=\"text-decoration: underline;\">\u00a0 \u00a0 \u00a0 \u00a0<\/span> \u00a0= <span style=\"text-decoration: underline;\">\u00a0 \u00a0 \u00a0 \u00a0<\/span><\/p>\n<p>Answer: 800 + 100 = 900<\/p>\n<p>Explanation:<\/p>\n<p>Step 1:<br \/>\nFirst round 790 to the nearest hundred.<br \/>\nThe number rounded to 790 nearest hundred is 800.<br \/>\nWrite zeros for the tens and ones digit.<\/p>\n<p>Step 2:<br \/>\nWrite the number closer to 112.<br \/>\nThe number closer to 112 is 100.<\/p>\n<p>Step 3:<br \/>\nNow find the sum of the rounded numbers.<br \/>\n800 + 100 = 900<br \/>\nThe estimated sum of 790 + 112 is 900.<\/p>\n<p>Question 9<br \/>\n547 + 326<\/p>\n<p>Estimate:<\/p>\n<p><span style=\"text-decoration: underline;\">\u00a0 \u00a0 \u00a0 \u00a0<\/span> \u00a0+<span style=\"text-decoration: underline;\">\u00a0 \u00a0 \u00a0 \u00a0<\/span> \u00a0= <span style=\"text-decoration: underline;\">\u00a0 \u00a0 \u00a0 \u00a0<\/span><\/p>\n<p>Answer: 550 + 325 = 875<\/p>\n<p>Explanation:<\/p>\n<p>Step 1:<br \/>\nFirst round 547 to the nearest ten.<br \/>\nThe number rounded to 547 nearest ten is 550.<br \/>\nWrite zeros for the ones digit.<\/p>\n<p>Step 2:<br \/>\nWrite the number closer to 326.<br \/>\nThe number closer to 326 is 325.<\/p>\n<p>Step 3:<br \/>\nNow find the sum of the rounded numbers.<br \/>\n550 + 325 = 875<\/p>\n<p>Question 10<br \/>\n325 + 458<\/p>\n<p>Estimate:<\/p>\n<p><span style=\"text-decoration: underline;\">\u00a0 \u00a0 \u00a0 \u00a0<\/span> \u00a0+<span style=\"text-decoration: underline;\">\u00a0 \u00a0 \u00a0 \u00a0<\/span> \u00a0= <span style=\"text-decoration: underline;\">\u00a0 \u00a0 \u00a0 \u00a0<\/span><\/p>\n<p>Answer: 325 + 500 = 825<\/p>\n<p>Explanation:<\/p>\n<p>First round 458 to the nearest hundred.<br \/>\nThe number rounded to 458 nearest hundred is 500.<br \/>\nWrite zeros for the tens and ones digit.<br \/>\nNow add 325 and 500,<br \/>\nYou get, 325 + 500 = 825<\/p>\n<p>Question 11<br \/>\n620 + 107<\/p>\n<p>Estimate:<\/p>\n<p><span style=\"text-decoration: underline;\">\u00a0 \u00a0 \u00a0 \u00a0<\/span> \u00a0+<span style=\"text-decoration: underline;\">\u00a0 \u00a0 \u00a0 \u00a0<\/span> \u00a0= <span style=\"text-decoration: underline;\">\u00a0 \u00a0 \u00a0 \u00a0<\/span><\/p>\n<p>Answer: 600 + 100 = 700<\/p>\n<p>Explanation:<\/p>\n<p>The number closer to 620 is 600.<br \/>\nAnd the number closer to 107 is 100.<br \/>\n600 + 100 = 700<br \/>\nNow the estimated sum of 620 + 107 = 700<\/p>\n<p>Problem Solving<br \/>\nQuestion 12<br \/>\nStephanie read 72 pages on Sunday and 83 pages on Monday. About how many pages did Stephanie read during the two days?<\/p>\n<p>About <span style=\"text-decoration: underline;\">\u00a0 \u00a0 \u00a0 \u00a0<\/span>\u00a0pages<\/p>\n<p>Answer: 150 pages<\/p>\n<p>Explanation:<\/p>\n<p>Stephanie read 72 pages on Sunday and 83 pages on Monday.<br \/>\nThe number rounded to 72 is 70 and the number rounded to 83 is 80.<br \/>\nTo know how many pages he read in two days we need to add the number of pages he read.<br \/>\n70 + 80 = 150 pages.<br \/>\nTherefore Stephanie read about 150 pages in 2 days.<\/p>\n<p>Question 13<br \/>\nMatt biked 345 miles last month. This month he has biked 107 miles. Altogether, about how many miles has Matt biked last month and this month?<\/p>\n<p>About <span style=\"text-decoration: underline;\">\u00a0 \u00a0 \u00a0 \u00a0<\/span> miles<\/p>\n<p>Answer: About 450 miles<\/p>\n<p>Explanation:<\/p>\n<p>Matt biked 345 miles last month.<br \/>\nThis month he has biked 107 miles.<br \/>\nThe number rounded to 345 is 350.<br \/>\nAnd the number closer to 107 is 100.<br \/>\nNow add number of miles he rides in last month and this month.<br \/>\n350 + 100 = 450 miles.<\/p>\n<h3><a id=\"Estimate_Sums_Lesson_Check_Page_No_22\"><\/a>Estimate Sums Lesson Check &#8211; Page No &#8211; 22<\/h3>\n<p>Lesson Check<br \/>\nQuestion 1<br \/>\nThe McBrides drove 317 miles on one day and 289 on the next day. What is the best estimate of the number of miles the McBrides drove in all during the two days?<\/p>\n<p>(a) 100<br \/>\n(b) 400<br \/>\n(c) 500<br \/>\n(d) 600<\/p>\n<p>Answer: 600<\/p>\n<p>Explanation:<\/p>\n<p>The McBrides drove 317 miles on one day and 289 on the next day.<br \/>\nFirst, round 317 to the nearest hundred.<br \/>\nThe number rounded to 317 nearest hundred is 300.<br \/>\nWrite zeros for the tens and ones digit.<br \/>\nNext round 289 to the nearest hundred.<br \/>\nThe number rounded to 289 nearest hundred is 300.<br \/>\nWrite zeros for the tens and ones digit.<br \/>\n300 +300 = 600.<br \/>\nOption D is the correct answer.<\/p>\n<p>Question 2<br \/>\nRyan counted 63 birds in his backyard last week. This week, he counted 71 birds in his backyard. About how many birds did Ryan count in all?<\/p>\n<p>(a) about 70<br \/>\n(b) about 100<br \/>\n(c) about 130<br \/>\n(d) about 200<\/p>\n<p>Answer: about 130<\/p>\n<p>Explanation:<\/p>\n<p>Ryan counted 63 birds in his backyard last week. This week, he counted 71 birds in his backyard.<br \/>\nThe number closer to 63 is 60.<br \/>\nThe number closer to 71 is 70.<br \/>\nNow add 60 and 70 we get 130.<br \/>\nTherefore Ryan count about 130 birds.<br \/>\nSo, the correct answer is option C.<\/p>\n<p>Spiral Review<br \/>\nQuestion 3<br \/>\nWhat name describes this shape?<\/p>\n<p><img loading=\"lazy\" class=\"size-full wp-image-282 alignnone\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2020\/06\/Go-Math-Grade-3-Chapter-1-Round-to-the-Nearest-Ten-or-Hundred-Page-22-What-name-describes-this-shape.jpg\" alt=\"Go Math Grade 3 Chapter 1 Round to the Nearest Ten or Hundred Page 22 What name describes this shape\" width=\"127\" height=\"124\" \/><\/p>\n<p>(a) cone<br \/>\n(b) cube<br \/>\n(c) quadrilateral<br \/>\n(d) square<\/p>\n<p>Answer: cube<\/p>\n<p>A cube is a three-dimensional solid object bounded by six square faces, facets or sides, with three meeting at each vertex. The cube is the only regular hexahedron and is one of the five Platonic solids. It has 6 faces, 12 edges, and 8 vertices.<\/p>\n<p>Question 4<br \/>\nWhich has an odd sum?<\/p>\n<p>(a) 9 + 9<br \/>\n(b) 5 + 3<br \/>\n(c) 6 + 7<br \/>\n(d) 2 + 8<\/p>\n<p>Answer: 6 + 7<\/p>\n<p>Explanation:<\/p>\n<p>(a) 9 + 9 = 18 even number<br \/>\n(b) 5 + 3 = 8 even number<br \/>\n(c) 6 + 7 = 13 odd number<br \/>\n(d) 2 + 8 = 10 even number<br \/>\nSo, the answer is option C.<\/p>\n<p>Question 5<br \/>\nWhat is 503 rounded to the nearest hundred?<\/p>\n<p>(a) 500<br \/>\n(b) 510<br \/>\n(c) 600<br \/>\n(d) 610<\/p>\n<p>Answer: 500<\/p>\n<p>The number 503 rounded to the nearest hundred is 500.<br \/>\nSo, the correct answer is option A.<\/p>\n<p>Question 6<br \/>\nWhat is 645 rounded to the nearest ten?<\/p>\n<p>(a) 600<br \/>\n(b) 640<br \/>\n(c) 650<br \/>\n(d) 700<\/p>\n<p>Answer: 650<\/p>\n<p>645 rounded to the nearest ten is 650.<br \/>\nSo, the correct answer is option C.<\/p>\n<h3><a id=\"Mental_Math_Strategies_for_Addition_Page_No_27\"><\/a>Mental Math Strategies for Addition Page No &#8211; 27<\/h3>\n<p>Count by tens and ones to find the sum.<\/p>\n<p>Use the number line to show your thinking.<\/p>\n<p>Question 1<\/p>\n<p><img loading=\"lazy\" class=\"size-full wp-image-283 alignnone\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2020\/06\/Go-Math-Grade-3-Chapter-1-Count-by-tens-and-ones-to-find-the-sum-Question-1.jpg\" alt=\"Go Math Grade 3 Chapter 1 Count by tens and ones to find the sum Question 1\" width=\"365\" height=\"98\" srcset=\"https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2020\/06\/Go-Math-Grade-3-Chapter-1-Count-by-tens-and-ones-to-find-the-sum-Question-1.jpg 365w, https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2020\/06\/Go-Math-Grade-3-Chapter-1-Count-by-tens-and-ones-to-find-the-sum-Question-1-300x81.jpg 300w\" sizes=\"(max-width: 365px) 100vw, 365px\" \/><\/p>\n<p>Answer: 29 + 14 = 43<\/p>\n<p>Question 2<\/p>\n<p><img loading=\"lazy\" class=\"alignnone size-full wp-image-284\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2020\/06\/Go-Math-Grade-3-Chapter-1-Count-by-tens-and-ones-to-find-the-sum-Question-2.jpg\" alt=\"Go Math Grade 3 Chapter 1 Count by tens and ones to find the sum Question 2\" width=\"360\" height=\"31\" srcset=\"https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2020\/06\/Go-Math-Grade-3-Chapter-1-Count-by-tens-and-ones-to-find-the-sum-Question-2.jpg 360w, https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2020\/06\/Go-Math-Grade-3-Chapter-1-Count-by-tens-and-ones-to-find-the-sum-Question-2-300x26.jpg 300w\" sizes=\"(max-width: 360px) 100vw, 360px\" \/><\/p>\n<p>36 + 28 =<\/p>\n<p>Answer: 36 + 28 = 64<\/p>\n<p>Question 3<\/p>\n<p><img loading=\"lazy\" class=\"alignnone size-full wp-image-284\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2020\/06\/Go-Math-Grade-3-Chapter-1-Count-by-tens-and-ones-to-find-the-sum-Question-2.jpg\" alt=\"Go Math Grade 3 Chapter 1 Count by tens and ones to find the sum Question 2\" width=\"360\" height=\"31\" srcset=\"https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2020\/06\/Go-Math-Grade-3-Chapter-1-Count-by-tens-and-ones-to-find-the-sum-Question-2.jpg 360w, https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2020\/06\/Go-Math-Grade-3-Chapter-1-Count-by-tens-and-ones-to-find-the-sum-Question-2-300x26.jpg 300w\" sizes=\"(max-width: 360px) 100vw, 360px\" \/><\/p>\n<p>45 + 26 =<\/p>\n<p>Answer: 45 + 26 = 71<\/p>\n<p>Question 4<\/p>\n<p><img loading=\"lazy\" class=\"alignnone size-full wp-image-284\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2020\/06\/Go-Math-Grade-3-Chapter-1-Count-by-tens-and-ones-to-find-the-sum-Question-2.jpg\" alt=\"Go Math Grade 3 Chapter 1 Count by tens and ones to find the sum Question 2\" width=\"360\" height=\"31\" srcset=\"https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2020\/06\/Go-Math-Grade-3-Chapter-1-Count-by-tens-and-ones-to-find-the-sum-Question-2.jpg 360w, https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2020\/06\/Go-Math-Grade-3-Chapter-1-Count-by-tens-and-ones-to-find-the-sum-Question-2-300x26.jpg 300w\" sizes=\"(max-width: 360px) 100vw, 360px\" \/><\/p>\n<p>52 + 34 =<\/p>\n<p>Answer: 52 + 34 = 86<\/p>\n<p>Use mental math to find the sum.<\/p>\n<p>Draw or describe the strategy you use.<\/p>\n<p>Question 5<br \/>\n52 + 19 =<\/p>\n<p>Answer: 52 + 19 = 71<\/p>\n<p>I Used friendly numbers.<br \/>\nSubtract 2 from 52.<br \/>\n52 &#8211; 2 = 50<br \/>\nThen add 2 to 19.<br \/>\n19 + 2 = 21<br \/>\nAdd 50 and 21<br \/>\n50 + 21 = 71<\/p>\n<p>Question 6<br \/>\n122 + 306 =<\/p>\n<p>Answer: 122 + 306 = 428<\/p>\n<p>I Used compatible numbers<br \/>\n122 = 120 + 2<br \/>\n306 = 300 + 6<br \/>\n120 + 300 = 420<br \/>\n2 + 6 = 8<br \/>\n420 + 8 = 428<\/p>\n<p>Problem Solving<br \/>\nQuestion 7<br \/>\nShelley spent 17 minutes washing the dishes. She spent 38 minutes cleaning her room. Explain how you can use mental math to find how long Shelley spent on the two tasks<\/p>\n<p><span style=\"text-decoration: underline;\">\u00a0 \u00a0 \u00a0 \u00a0<\/span> minutes<\/p>\n<p>Answer: 20 + 35 = 55 minutes<\/p>\n<p>Explanation:<\/p>\n<p>Shelley spent 17 minutes washing the dishes.<br \/>\nShe spent 38 minutes cleaning her room.<br \/>\nFirst, make friendly numbers.<br \/>\nAdd 3 to 17 to make it easy for addition<br \/>\n17 + 3 = 20<br \/>\nNext, subtract 3 from 38.<br \/>\n38 &#8211; 3 = 35<br \/>\nNow add both, 35 + 20 = 55<br \/>\nShelly spent 55 minutes on the two tasks.<\/p>\n<p>Question 8<br \/>\nIt took Marty 42 minutes to write a book report. Then he spent 18 minutes correcting his report. Explain how you can use mental math to find how long Marty spent on his book report.<\/p>\n<p><span style=\"text-decoration: underline;\">\u00a0 \u00a0 \u00a0 \u00a0<\/span> minutes<\/p>\n<p>Answer: 50 + 10 = 60 minutes<\/p>\n<p>Explanation:<\/p>\n<p>It took Marty 42 minutes to write a book report.<br \/>\nThen he spent 18 minutes correcting his report.<br \/>\nMake a friendly number<br \/>\nSubtract 2 from 42<br \/>\n42 &#8211; 2 = 40 minutes<br \/>\nNow add 2 to 18 minutes<br \/>\n18 + 2 = 20 minutes<br \/>\nNow add both, 20 + 40 = 60 minutes<br \/>\nTherefore Marty spent 60 minutes on his book report<\/p>\n<h3><a id=\"Mental_Math_Strategies_for_Addition_Lesson_Check_Page_No_28\"><\/a>Mental Math Strategies for Addition Page No &#8211; 28<\/h3>\n<p>Lesson Check<br \/>\nQuestion 1<br \/>\nSylvia spent 36\u00a2 for a pencil and 55\u00a2 for a notepad. Use mental math to find how much she spent in all.<\/p>\n<p>(a) 80\u00a2<br \/>\n(b) 81\u00a2<br \/>\n(c) 90\u00a2<br \/>\n(d) 91\u00a2<\/p>\n<p>Answer: 91\u00a2<\/p>\n<p>Explanation:<\/p>\n<p>Sylvia spent 36\u00a2 for a pencil and 55\u00a2 for a notepad.<br \/>\nStep 1:<br \/>\nMake a friendly number<br \/>\nAdd 36\u00a2 and 55\u00a2<br \/>\n36\u00a2 + 55\u00a2 = 91\u00a2<br \/>\nSo, the correct answer is option D.<\/p>\n<p>Question 2<br \/>\nWill spent 24 minutes putting together a model plane. Then he spent 48 minutes painting the model. How long did Will spend working on the model plane?<\/p>\n<p>(a) 62 minutes<br \/>\n(b) 68 minutes<br \/>\n(c) 72 minutes<br \/>\n(d) 81 minutes<\/p>\n<p>Answer: 72 minutes<\/p>\n<p>Explanation:<\/p>\n<p>Will spent 24 minutes putting together a model plane. Then he spent 48 minutes painting the model.<br \/>\nAdd 24 and 48<br \/>\n24 + 48 = 72 minutes<br \/>\nOption C is the correct answer.<\/p>\n<p><em>Spiral Review<\/em><\/p>\n<p>Question 3<br \/>\nWhat name describes this shape?<\/p>\n<p><img loading=\"lazy\" class=\"alignnone size-full wp-image-285\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2020\/06\/Go-Math-Grade-3-Chapter-1-What-name-describes-this-shape.jpg\" alt=\"Go Math Grade 3 Chapter 1 What name describes this shape\" width=\"127\" height=\"121\" \/><\/p>\n<p>(a) hexagon<br \/>\n(b) pentagon<br \/>\n(c) quadrilateral<br \/>\n(d) triangle<\/p>\n<p>Answer: pentagon<\/p>\n<p>Explanation:<\/p>\n<p>From the figure, we can observe that there are 5 sides. A pentagon is a 5-sided Polygon<br \/>\nSo, the correct answer is option B.<\/p>\n<p>Question 4<br \/>\nWhat word describes the equal shares of the shape?<\/p>\n<p><img loading=\"lazy\" class=\"alignnone size-full wp-image-286\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2020\/06\/Go-Math-Grade-3-Chapter-1-What-word-describes-the-equal-shares-of-the-shape.jpg\" alt=\"Go Math Grade 3 Chapter 1 What word describes the equal shares of the shape\" width=\"104\" height=\"102\" \/><\/p>\n<p>(a) fourths<br \/>\n(b) halves<br \/>\n(c) sixths<br \/>\n(d) thirds<\/p>\n<p>Answer: fourths<\/p>\n<p>Explanation:<\/p>\n<p>The circle is divided into 4 equal parts. The name for the equal shares of circle is fourths.<\/p>\n<p>Question 5<br \/>\nTammy wrote an addition problem that has an odd sum. Which could be Tammy\u2019s addition problem?<\/p>\n<p>(a) 2 + 6<br \/>\n(b) 3 + 5<br \/>\n(c) 5 + 6<br \/>\n(d) 7 + 7<\/p>\n<p>Answer: 5 + 6<\/p>\n<p>Explanation:<\/p>\n<p>(a) 2 + 6 = 8 even number<br \/>\n(b) 3 + 5 = 8 even number<br \/>\n(c) 5 + 6 = 11 odd number<br \/>\n(d) 7 + 7 = 14 even number<br \/>\n11 is an odd number. So, the correct answer is option C.<\/p>\n<p>Question 6<br \/>\nGreg counted 83 cars and 38 trucks in the mall parking lot. Which is the best estimate of the total number of cars and trucks Greg counted?<\/p>\n<p>(a) 100<br \/>\n(b) 110<br \/>\n(c) 120<br \/>\n(d) 130<\/p>\n<p>Answer: 120<\/p>\n<p>Explanation:<\/p>\n<p>Greg counted 83 cars and 38 trucks in the mall parking lot.<br \/>\nThe number closer to 83 is 80.<br \/>\nAnd the number closer to 38 is 40.<br \/>\n80 + 40 = 120.<br \/>\nSo, the correct answer is option C.<\/p>\n<h3><a id=\"Use_Properties_to_Add_Page_No_33\"><\/a>Use Properties to Add Page No 33<\/h3>\n<p>Use addition properties and strategies to find the sum.<\/p>\n<p>Question 1<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-288\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2020\/06\/Go-Math-Grade-3-Chapter-1-Use-Properties-of-Add-Question-1.jpg\" alt=\"Go Math Grade 3 Chapter 1 Use Properties of Add Question 1\" width=\"296\" height=\"179\" \/><\/p>\n<p>Question 2<br \/>\n27 + 68 + 43 =<\/p>\n<p>Answer: 138<\/p>\n<p>Explanation:<\/p>\n<p>Step 1:<br \/>\nLine up the numbers by place value.<br \/>\n27<br \/>\n68<br \/>\n<span style=\"text-decoration: underline;\">+43<\/span><\/p>\n<p>Step 2:<br \/>\nGroup the ones to make them easy to add.<br \/>\nMake a 10<br \/>\n27<br \/>\n68<br \/>\n<span style=\"text-decoration: underline;\">+43<\/span><\/p>\n<p>7 + 3 = 10<br \/>\n1 will be carried to tens place.<br \/>\n8 will be in the ones place.<\/p>\n<p>Step 3:<br \/>\nGroup the tens to make them easy to add.<br \/>\n27<br \/>\n68<br \/>\n<span style=\"text-decoration: underline;\">+43<br \/>\n<\/span>6 + 4 = 10<br \/>\n10 + 3 = 13<\/p>\n<p>27 + 68 + 43 = 138<\/p>\n<p>Question 3<br \/>\n42 + 36 + 18 =<\/p>\n<p>Answer: 96<\/p>\n<p>Explanation:<\/p>\n<p>Step 1:<br \/>\nLine up the numbers by place value.<\/p>\n<p>42<br \/>\n36<br \/>\n<span style=\"text-decoration: underline;\">+18<\/span><\/p>\n<p>8 + 2 = 10<br \/>\n1 will be carried to the tens place<br \/>\n6 will be in the ones place.<\/p>\n<p>Step 2:<br \/>\nGroup the ones to make them easy to add.<br \/>\nMake a 10<br \/>\n42<br \/>\n36<br \/>\n<span style=\"text-decoration: underline;\">+18<\/span><\/p>\n<p>40 + 30 + 10 + 10 = 90<\/p>\n<p>Step 3:<br \/>\nGroup the tens to make them easy to add.<br \/>\n90 + 6 = 96<\/p>\n<p>Question 4<br \/>\n74 + 35 + 16 + 45 =<\/p>\n<p>Answer: 170<\/p>\n<p>Explanation:<\/p>\n<p>Step 1:<br \/>\nLine up the numbers by place value.<br \/>\n74<br \/>\n35<br \/>\n16<br \/>\n<span style=\"text-decoration: underline;\">+45<\/span><\/p>\n<p>Step 2:<br \/>\nGroup the ones to make them easy to add.<br \/>\nMake a 10<br \/>\n74<br \/>\n35<br \/>\n16<br \/>\n<span style=\"text-decoration: underline;\">+45<\/span><\/p>\n<p>6 + 4 = 10<br \/>\n5 + 5 = 10<br \/>\n10 + 10 = 20<br \/>\n2 will be carried to tens place<br \/>\n0 will be in the ones place.<\/p>\n<p>Step 3:<br \/>\nGroup the tens to make them easy to add.<br \/>\n70 + 30 + 10 + 40 +20 = 170<\/p>\n<p>Question 5<br \/>\n41 + 26 + 149 =<\/p>\n<p>Answer: 216<\/p>\n<p>Explanation:<\/p>\n<p>Step 1:<br \/>\nLine up the numbers by place value.<\/p>\n<p>149<br \/>\n41<br \/>\n<span style=\"text-decoration: underline;\">+26<\/span><\/p>\n<p>Step 2:<br \/>\nGroup the ones to make them easy to add.<br \/>\nMake a 10<\/p>\n<p>149<br \/>\n41<br \/>\n<span style=\"text-decoration: underline;\">+26<\/span><\/p>\n<p>9 + 1 = 10<br \/>\n1 will be carried to tens place.<br \/>\n6 will be in the ones place.<\/p>\n<p>Step 3:<br \/>\nGroup the tens to make them easy to add.<br \/>\n140 + 40 + 20 + 10 = 210<br \/>\n210 + 6 = 216<\/p>\n<p>Question 6<br \/>\n52 + 64 + 28 + 44 =<\/p>\n<p>Answer: 188<\/p>\n<p>Explanation:<\/p>\n<p>Step 1:<br \/>\nLine up the numbers by place value.<br \/>\n52<br \/>\n64<br \/>\n28<br \/>\n<span style=\"text-decoration: underline;\">+44<\/span><\/p>\n<p>Step 2:<br \/>\nGroup the ones to make them easy to add.<br \/>\nMake a 10<\/p>\n<p>52<br \/>\n64<br \/>\n28<br \/>\n<span style=\"text-decoration: underline;\">+44<\/span><\/p>\n<p>8 + 2 = 10<br \/>\n4 + 4 = 8<br \/>\n1 will be carried to the tens place.<br \/>\n8 will be in the ones place.<\/p>\n<p>Step 3:<br \/>\nGroup the tens to make them easy to add.<br \/>\n50 + 60 + 20 + 40 + 10 = 180<br \/>\n180 + 8 = 188<\/p>\n<p>Problem Solving<br \/>\nQuestion 7<br \/>\nA pet shelter has 26 dogs, 37 cats, and 14 gerbils. How many of these animals are in the pet shelter in all?<\/p>\n<p><span style=\"text-decoration: underline;\">\u00a0 \u00a0 \u00a0 \u00a0<\/span> animals<\/p>\n<p>Answer: 77 animals<\/p>\n<p>Explanation:<\/p>\n<p>Given that, A pet shelter has 26 dogs, 37 cats, and 14 gerbils.<br \/>\nAdd the total number of pets<br \/>\n26 + 37 + 14 = 77 animals.<\/p>\n<p>Question 8<br \/>\nThe pet shelter bought 85 pounds of dog food, 50 pounds of cat food, and 15 pounds of gerbil food. How many pounds of animal food did the pet shelter buy?<\/p>\n<p><span style=\"text-decoration: underline;\">\u00a0 \u00a0 \u00a0 \u00a0<\/span> pounds<\/p>\n<p>Answer: 150 pounds<\/p>\n<p>Explanation:<\/p>\n<p>Step 1:<br \/>\nLine up the numbers by place value.<\/p>\n<p>85<br \/>\n50<br \/>\n<span style=\"text-decoration: underline;\">+15<\/span><\/p>\n<p>Step 2:<br \/>\nGroup the ones to make them easy to add.<br \/>\nMake a 10<\/p>\n<p>85<br \/>\n50<br \/>\n<span style=\"text-decoration: underline;\">+15<\/span><\/p>\n<p>5 + 5 = 10<\/p>\n<p>Step 3:<br \/>\nGroup the tens to make them easy to add.<br \/>\n80 + 50 + 10 + 10 = 150<\/p>\n<h3><a id=\"Use_Properties_to_Add_Lesson_Check_Page_No_34\"><\/a>Use Properties to Add Page No 34<\/h3>\n<p>Lesson Check<br \/>\nQuestion 1<br \/>\nAt summer camp there are 52 boys, 47 girls, and 18 adults. How many people are at summer camp?<\/p>\n<p>(a) 97<br \/>\n(b) 107<br \/>\n(c) 117<br \/>\n(d) 127<\/p>\n<p>Answer: 117<\/p>\n<p>Explanation:<\/p>\n<p>At summer camp there are 52 boys, 47 girls, and 18 adults.<br \/>\n57<br \/>\n47<br \/>\n<span style=\"text-decoration: underline;\">+18<\/span><\/p>\n<p>52 + 47 + 18 = 117<br \/>\nTherefore 117 people are at summer camp.<br \/>\nThe correct answer is option C.<\/p>\n<p>Question 2<br \/>\nAt camp, 32 children are swimming, 25 are fishing, and 28 are canoeing. How many children are swimming, fishing, or canoeing?<\/p>\n<p>(a) 75<br \/>\n(b) 85<br \/>\n(c) 95<br \/>\n(d) 105<\/p>\n<p>Answer: 85<\/p>\n<p>Explanation:<\/p>\n<p>At camp, 32 children are swimming, 25 are fishing, and 28 are canoeing.<br \/>\n32<br \/>\n25<br \/>\n<span style=\"text-decoration: underline;\">+28<br \/>\n<\/span><\/p>\n<p>Make a group of 10.<\/p>\n<p>32<br \/>\n25<br \/>\n<span style=\"text-decoration: underline;\">+28<br \/>\n<\/span><\/p>\n<p>8 + 2 = 10<br \/>\n1 will be carried to the tens place.<br \/>\n5 will be in the ones place.<br \/>\n30 + 20 + 20 + 10 = 80<br \/>\n80 + 5 = 85<br \/>\nThe correct answer is option B.<\/p>\n<p>Spiral Review<br \/>\nQuestion 3<br \/>\nFour students estimated the width of the door to their classroom. Who made the best estimate?<\/p>\n<p>(a) Ted: 1 foot<br \/>\n(b) Hank: 3 feet<br \/>\n(c) Ann: 10 feet<br \/>\n(d) Maria: 15 feet<\/p>\n<p>Answer: Hank: 3 feet<\/p>\n<p>Question 4<br \/>\nFour students estimated the height of the door to their classroom. Who made the best estimate?<\/p>\n<p>(a) Larry: 1 meter<br \/>\n(b) Garth: 2 meters<br \/>\n(c) Ida: 14 meters<br \/>\n(d) Jill: 20 meters<\/p>\n<p>Answer: Garth: 2 meters<\/p>\n<p>Question 5<br \/>\nJeff\u2019s dog weighs 76 pounds. What is the dog\u2019s weight rounded to the nearest ten pounds?<\/p>\n<p>(a) 70 pounds<br \/>\n(b) 80 pounds<br \/>\n(c) 90 pounds<br \/>\n(d) 100 pounds<\/p>\n<p>Answer: 80 pounds<\/p>\n<p>Explanation:<\/p>\n<p>Jeff\u2019s dog weighs 76 pounds.<br \/>\n76 rounded to the nearest ten is 80.<br \/>\nThe correct answer is option B.<\/p>\n<p>Question 6<br \/>\nMs. Kirk drove 164 miles in the morning and 219 miles in the afternoon. Which is the best estimate of the total number of miles she drove that day?<\/p>\n<p>(a) 100 miles<br \/>\n(b) 200 miles<br \/>\n(c) 400 miles<br \/>\n(d) 500 miles<\/p>\n<p>Answer: 400 miles<\/p>\n<p>Explanation:<\/p>\n<p>Ms. Kirk drove 164 miles in the morning and 219 miles in the afternoon.<br \/>\nThe number closer to 164 is 200.<br \/>\nThe number closer to 219 is 200.<br \/>\nNow add the total number of mile<br \/>\n200 + 200 = 400 miles.<br \/>\nThe correct answer is option C.<\/p>\n<h3><a id=\"Use_the_Break_Apart_Startegy_to_Add_Page_No_39\"><\/a>Use the Break Apart Strategy to Add Page No 39<\/h3>\n<p>Estimate. Then use the break apart strategy to find the sum.<\/p>\n<p>Question 1<\/p>\n<p><img loading=\"lazy\" class=\"alignnone size-full wp-image-291\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2020\/06\/Go-Math-Grade-3-Chapter-1-Use-the-Break-Apart-Strategy-to-Add-Question-1.png\" alt=\"\" width=\"163\" height=\"88\" \/><\/p>\n<p>Question 2<br \/>\n518 + 372<\/p>\n<p>Estimate: <span style=\"text-decoration: underline;\">900<\/span><\/p>\n<p>Sum:<br \/>\n518 = 500 + 10 + 8<br \/>\n<span style=\"text-decoration: underline;\">+372<\/span> = <span style=\"text-decoration: underline;\">300 + 70 + 2<\/span><br \/>\n890\u00a0 \u00a0 \u00a0800 + 80 + 10<\/p>\n<p>Question 3<br \/>\n473 + 123<\/p>\n<p>Estimate: <span style=\"text-decoration: underline;\">600<\/span><\/p>\n<p>Sum:<br \/>\n473 = 400 + 70 + 3<br \/>\n<span style=\"text-decoration: underline;\">123<\/span> = <span style=\"text-decoration: underline;\">100 + 20 + 3<\/span><br \/>\n596 = 500 + 90 + 6<\/p>\n<p>Question 4<br \/>\n208 + 569<\/p>\n<p>Estimate: <span style=\"text-decoration: underline;\">800<\/span><\/p>\n<p>Sum:<br \/>\n208 = 200 + 00 + 8<br \/>\n<span style=\"text-decoration: underline;\">569<\/span> = <span style=\"text-decoration: underline;\">500 + 60 + 9<\/span><br \/>\n777 = 700 + 70 + 7<\/p>\n<p>Question 5<br \/>\n731 + 207<\/p>\n<p>Estimate: <span style=\"text-decoration: underline;\">900<\/span><\/p>\n<p>Sum:<br \/>\n731 = 700 + 30 + 1<br \/>\n<span style=\"text-decoration: underline;\">207<\/span> = <span style=\"text-decoration: underline;\">200 + 00 + 7<\/span><br \/>\n938 = 900 + 30 + 8<\/p>\n<p>Question 6<br \/>\n495 + 254<\/p>\n<p>Estimate: <span style=\"text-decoration: underline;\">800<\/span><\/p>\n<p>Sum:<br \/>\n495 = 400 + 90 + 5<br \/>\n<span style=\"text-decoration: underline;\">254<\/span> = <span style=\"text-decoration: underline;\">200 + 50 + 4<\/span><br \/>\n749 = 700 + 40 + 9<\/p>\n<p><em>Problem Solving<\/em><br \/>\nUse the table for 7\u20138.<\/p>\n<p><img loading=\"lazy\" class=\"alignnone size-full wp-image-292\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2020\/06\/Go-Math-Grade-3-Chapter-1-Problem-Solving.jpg\" alt=\"Go Math Grade 3 Chapter 1 Problem Solving\" width=\"237\" height=\"172\" \/><\/p>\n<p>Question 7<br \/>\nLaura is making a building using Set A and Set C. How many blocks can she use in her building?<\/p>\n<p><span style=\"text-decoration: underline;\">\u00a0 \u00a0 \u00a0 \u00a0<\/span> blocks<\/p>\n<p>Answer: 410 blocks<\/p>\n<p>Add set A and Set C<br \/>\n165 + 245 = 410 blocks<\/p>\n<p>165 = 100 + 60 +5<br \/>\n<span style=\"text-decoration: underline;\">245 = 200 + 40 + 5<\/span><br \/>\n410 = 300 + 100 + 10<br \/>\nShe can use 410 blocks in her building.<\/p>\n<p>Question 8<br \/>\nClark is making a building using Set B and Set C. How many blocks can he use in his building?<\/p>\n<p><span style=\"text-decoration: underline;\">\u00a0 \u00a0 \u00a0 \u00a0<\/span> blocks<\/p>\n<p>Answer: 433 blocks<\/p>\n<p>Add Set B and Set C<br \/>\n188 + 245 =<\/p>\n<p>188 = 100 + 80 + 8<br \/>\n<span style=\"text-decoration: underline;\">245 = 200 + 40 + 5<\/span><br \/>\n433 = 300 + 120 + 13<br \/>\nHe can use 433 blocks in his building.<\/p>\n<h3><a id=\"Use_the_Break_Apart_Strategy_to_Add_Lesson_Check_Page_No_40\"><\/a>Use the Break Apart Strategy to Add Page No 40<\/h3>\n<p>Lesson Check<br \/>\nQuestion 1<br \/>\nArthur read two books last week. One book has 216 pages. The other book has 327 pages. Altogether, how many pages are in the two books?<\/p>\n<p>(a) 533<br \/>\n(b) 543<br \/>\n(c) 633<br \/>\n(d) 643<\/p>\n<p>Answer: 543<\/p>\n<p>Explanation:<\/p>\n<p>Add 216 and 327<br \/>\n216 = 200 + 10 + 6<br \/>\n<span style=\"text-decoration: underline;\">327 = 300 + 20 + 7<\/span><br \/>\n543 = 500 + 30 + 13<\/p>\n<p>So, the correct answer is option B.<\/p>\n<p>Question 2<br \/>\nOne skeleton in a museum has 189 bones. Another skeleton has 232 bones. How many bones in all are in the two skeletons?<\/p>\n<p>(a) 311<br \/>\n(b) 312<br \/>\n(c) 411<br \/>\n(d) 421<\/p>\n<p>Answer: 421<\/p>\n<p>Explanation:<\/p>\n<p>Add 189 and 232<br \/>\n189 = 100 + 80 + 9<br \/>\n<span style=\"text-decoration: underline;\">232 = 200 + 30 + 2<\/span><br \/>\n421 = 300 + 110 + 11<br \/>\nThus the answer is option D.<\/p>\n<p>Spiral Review<br \/>\nQuestion 3<br \/>\nCulver has 1 quarter, 3 dimes, and a penny. How much money does he have?<\/p>\n<p>(a) 41\u00a2<br \/>\n(b) 55\u00a2<br \/>\n(c) 56\u00a2<br \/>\n(d) 86\u00a2<\/p>\n<p>Answer: 56\u00a2<\/p>\n<p>Explanation:<\/p>\n<p>1 quarter = $0.25<br \/>\n1 dime = $0.10<br \/>\n3 dimes = $0.10 \u00d7 3 = $0.30<br \/>\n1 penny = $0.01<br \/>\nAdd $0.25 + $0.30 + $0.01 = $0.56 = 56 cents<br \/>\nThus the correct answer is option C.<\/p>\n<p>Question 4<br \/>\nFelicia has 34 quarters, 25 dimes, and 36 pennies. How many coins does Felicia have?<\/p>\n<p>(a) 75<br \/>\n(b) 85<br \/>\n(c) 95<br \/>\n(d) 105<\/p>\n<p>Answer: 95<\/p>\n<p>Explanation:<\/p>\n<p>1 quarter = $0.25<br \/>\n34 quarters = $0.25 \u00d7 34 = $8.5<br \/>\n25 dimes = $0.10 \u00d7 25 = $2.5<br \/>\n36 pennies = $0.01 \u00d7 36 = 0.36<br \/>\nOption C is the correct answer.<\/p>\n<p>Question 5<br \/>\nJonas wrote 9 + 8 = 17. Which number sentence shows the Commutative Property of Addition?<\/p>\n<p>(a) 9 + 0 = 9<br \/>\n(b) 8 + 9 = 17<br \/>\n(c) 17 &#8211; 9 = 8<br \/>\n(d) 17 &#8211; 8 = 9<\/p>\n<p>Answer: 8 + 9 = 17<\/p>\n<p>According to the commutative property of addition, changing the order of the numbers we are adding, does not change the sum.<br \/>\nSo, the correct answer is option B.<\/p>\n<p>Question 6<br \/>\nAt Kennedy School there are 37 girls and 36 boys in the third grade. How many students are in the third grade at Kennedy School?<\/p>\n<p>(a) 63<br \/>\n(b) 73<br \/>\n(c) 81<br \/>\n(d) 91<\/p>\n<p>Answer: 73<\/p>\n<p>Explanation:<\/p>\n<p>Given that,<br \/>\nAt Kennedy School there are 37 girls and 36 boys in the third grade.<br \/>\nAdd number of girls and boys = 37 + 36 = 73<br \/>\nTherefore the correct answer is option B.<\/p>\n<h3><a id=\"Use_the_Place_Value_to_Add_Page_No_45\"><\/a>Use Place Value to Add Page No 45<\/h3>\n<p>Estimate. Then find the sum.<\/p>\n<p>Question 1<br \/>\nEstimate: <strong><span style=\"text-decoration: underline;\">600<\/span><\/strong><\/p>\n<p>324 + 285 = 609<\/p>\n<p>324<br \/>\n<span style=\"text-decoration: underline;\">285<\/span><br \/>\n609<\/p>\n<p>Question 2<br \/>\n519\u00a0 + 347<\/p>\n<p>Estimate: 500 + 300 = <span style=\"text-decoration: underline;\">800<\/span><\/p>\n<p>Sum: 519 + 347<br \/>\n519<br \/>\n<span style=\"text-decoration: underline;\">347<\/span><br \/>\n866<\/p>\n<p>Question 3<br \/>\n323 + 151<\/p>\n<p>Estimate: 323 + 151 = 325 + 150= 475<\/p>\n<p>Sum:<\/p>\n<p>323<br \/>\n<span style=\"text-decoration: underline;\">151<\/span><br \/>\n474<\/p>\n<p>Question 4<br \/>\n169 + 354<\/p>\n<p>Estimate: 150 + 350 =<span style=\"text-decoration: underline;\"> 500<\/span><\/p>\n<p>Sum:<\/p>\n<p>169<br \/>\n<span style=\"text-decoration: underline;\">354<\/span><br \/>\n523<\/p>\n<p>Question 5<br \/>\n148 + 285<\/p>\n<p>Estimate: 150 + 300 = <span style=\"text-decoration: underline;\">450<\/span><\/p>\n<p>Sum: 148 + 285 = 433<\/p>\n<p>148<br \/>\n<span style=\"text-decoration: underline;\">285<\/span><br \/>\n433<\/p>\n<p>Question 6<br \/>\n270 + 453<\/p>\n<p>Estimate: 300 + 450 = <span style=\"text-decoration: underline;\">750<\/span><\/p>\n<p>Sum: 270 + 453 = <span style=\"text-decoration: underline;\">723<\/span><\/p>\n<p>270<br \/>\n<span style=\"text-decoration: underline;\">453<\/span><br \/>\n723<\/p>\n<p>Question 7<br \/>\n275 + 116<\/p>\n<p>Estimate: 275 + 100 = <span style=\"text-decoration: underline;\">375<\/span><\/p>\n<p>Sum:<\/p>\n<p>275<br \/>\n<span style=\"text-decoration: underline;\">116<\/span><br \/>\n391<\/p>\n<p>Question 8<br \/>\n157 + 141<\/p>\n<p>Estimate: 150 + 150 = <span style=\"text-decoration: underline;\">300<\/span><\/p>\n<p>Sum:<\/p>\n<p>157<br \/>\n<span style=\"text-decoration: underline;\">141<\/span><br \/>\n298<\/p>\n<p>Question 9<br \/>\n127 + 290<\/p>\n<p>Estimate: 100 + 300 = <span style=\"text-decoration: underline;\">400<\/span><\/p>\n<p>Sum:<\/p>\n<p>127<br \/>\n<span style=\"text-decoration: underline;\">290<\/span><br \/>\n417<\/p>\n<p>Question 10<br \/>\n258 + 565<\/p>\n<p>Estimate: 250 + 550 = <span style=\"text-decoration: underline;\">800<\/span><\/p>\n<p>Sum:<\/p>\n<p>258<br \/>\n<span style=\"text-decoration: underline;\">565<\/span><br \/>\n823<\/p>\n<p>Question 11<br \/>\n311 + 298<\/p>\n<p>Estimate: 300 + 300 = 600<\/p>\n<p>Sum:<\/p>\n<p>311<br \/>\n<span style=\"text-decoration: underline;\">298<\/span><br \/>\n609<\/p>\n<p>Question 12<br \/>\n534 + 256<\/p>\n<p>Estimate: 550 + 250 = 800<\/p>\n<p>Sum:<\/p>\n<p>534<br \/>\n<span style=\"text-decoration: underline;\">256<\/span><br \/>\n790<\/p>\n<p><em><strong>Problem Solving<\/strong><\/em><br \/>\nQuestion 13<br \/>\nMark has 215 baseball cards. Emily has 454 baseball cards. How many baseball cards do Mark and Emily have altogether?<\/p>\n<p><span style=\"text-decoration: underline;\">\u00a0 \u00a0 \u00a0 \u00a0<\/span> cards<\/p>\n<p>Answer: 669 baseball cards.<\/p>\n<p>Explanation:<\/p>\n<p>Given,<br \/>\nMark has 215 baseball cards.<br \/>\nEmily has 454 baseball cards.<br \/>\nTotal number of baseball cards = 215 + 454 = 669<br \/>\nTherefore there are 669 baseball cards.<\/p>\n<p>Question 14<br \/>\nJason has 330 pennies. Richie has 268 pennies. Rachel has 381 pennies. Which two students have more than 700 pennies combined?<\/p>\n<p>Answer: Jason and Rachel<\/p>\n<p>Explanation:<\/p>\n<p>Jason has 330 pennies. Richie has 268 pennies. Rachel has 381 pennies.<br \/>\nThe rounded number of 330 is 300.<br \/>\nThe number closer to 268 is 300<br \/>\nThe number rounded to 381 is 400.<br \/>\nYou will get 700 when to combine the pennies of Jason and Rachel<\/p>\n<h3><a id=\"Use_the_Place_Value_to_Add_Lesson_Check_Page_No_46\"><\/a>Lesson Check Page No 46<\/h3>\n<p>Question 1<br \/>\nThere are 167 students in the third grade. The same number of students is in the fourth grade. How many third graders and fourth graders are there in all?<\/p>\n<p>(a) 224<br \/>\n(b) 234<br \/>\n(c) 324<br \/>\n(d) 334<\/p>\n<p>Answer: 334<\/p>\n<p>Explanation:<\/p>\n<p>Given that there are 167 students in the third grade.<br \/>\nThe same number of students is in the fourth grade.<br \/>\nThat means there are 167 students in the fourth grade.<br \/>\nTo find the total number of students in third grade and fourth grade<br \/>\nYou need to add 167 and 167<br \/>\n167 + 167 = 334.<br \/>\nThus the correct answer is option D.<\/p>\n<p>Question 2<br \/>\nJamal read a book with 128 pages. Then he read a book with 179 pages. How many pages did Jamal read in all?<\/p>\n<p>(a) 397<br \/>\n(b) 307<br \/>\n(c) 297<br \/>\n(d) 207<\/p>\n<p>Answer: 307<\/p>\n<p>Explanation:<\/p>\n<p>Jamal read a book with 128 pages. Then he read a book with 179 pages.<br \/>\n128 + 179 = 307<br \/>\nSo, the answer is option B.<\/p>\n<p>Spiral Review<br \/>\nQuestion 3<br \/>\nAdam travels 248 miles on Monday. He travels 167 miles on Tuesday. Which is the best estimate for the total number of miles Adam travels?<\/p>\n<p>(a) 200<br \/>\n(b) 300<br \/>\n(c) 400<br \/>\n(d) 500<\/p>\n<p>Answer: 400<\/p>\n<p>Explanation:<\/p>\n<p>Adam travels 248 miles on Monday. He travels 167 miles on Tuesday.<br \/>\nThe number closer to 248 is 200<br \/>\nAnd the number closer to 167 is 200.<br \/>\n200 + 200 = 400<br \/>\nThus the estimated number of miles Adam travels is 400.<\/p>\n<p>Question 4<br \/>\nWes made $14, $62, $40, and $36 mowing lawns. How much did he make in all mowing lawns?<\/p>\n<p>(a) $116<br \/>\n(b) $152<br \/>\n(c) $166<br \/>\n(d) $188<\/p>\n<p>Answer: $152<\/p>\n<p>Explanation:<\/p>\n<p>Add<br \/>\n14<br \/>\n62<br \/>\n40<br \/>\n<span style=\"text-decoration: underline;\">+36<\/span><br \/>\n152<br \/>\nThus the correct answer is option B.<\/p>\n<p>Question 5<br \/>\nThere are 24 students in Mrs. Cole\u2019s class and 19 students in Mr. Garmen\u2019s class. How many students in all are in the two classes?<\/p>\n<p>(a) 43<br \/>\n(b) 40<br \/>\n(c) 33<br \/>\n(d) 5<\/p>\n<p>Answer: 43<\/p>\n<p>Add 24 and 19<br \/>\n24 + 19 = 43<br \/>\nThus the correct answer is option A.<\/p>\n<p>Question 6<br \/>\nThere were 475 children at the baseball game on Sunday. What is 475 rounded to the nearest ten?<\/p>\n<p>(a) 400<br \/>\n(b) 470<br \/>\n(c) 480<br \/>\n(d) 500<\/p>\n<p>Answer: 480<\/p>\n<p>Explanation:<\/p>\n<p>There were 475 children at the baseball game on Sunday.<br \/>\n475 rounded to the nearest ten is 480.<br \/>\nSo, the answer is option C.<\/p>\n<h3><a id=\"Mid_Chapter_Check_Point_Vocabulary_Page No_47\"><\/a>Mid Chapter Check Point &#8211; Vocabulary Page No 47<\/h3>\n<p>Choose the best term from the box.<\/p>\n<p><img loading=\"lazy\" class=\"alignnone size-full wp-image-294\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2020\/06\/Go-Math-Grade-3-Chapter-1-Choose-the-best-term-from-the-box..jpg\" alt=\"Go Math Grade 3 Chapter 1 Choose the best term from the box.\" width=\"265\" height=\"287\" \/><\/p>\n<p>Question 1<br \/>\nA ________ is an ordered set of numbers or objects in which the order helps you predict what comes next.<\/p>\n<p>Answer: Pattern is an ordered set of numbers or objects in which the order helps you predict what comes next.<\/p>\n<p>Question 2<br \/>\nThe _________ states that when you add zero to any number, the sum is that number.<\/p>\n<p>Answer: Identity property of Addition states that when you add zero to any number, the sum is that number<\/p>\n<p>Concepts and Skills<br \/>\nIs the sum even or odd? Write even or odd.<\/p>\n<p>Question 3<br \/>\n8 + 3<\/p>\n<p>Answer: 8 + 3 = 11 is an odd number.<\/p>\n<p>Question 4<br \/>\n9 + 7<\/p>\n<p>Answer: 9 + 7 = 16 is an even number<\/p>\n<p>Question 5<br \/>\n4 + 6<\/p>\n<p>Answer: 4 + 6 = 10 is an even number<\/p>\n<p>Use rounding or compatible numbers to estimate the sum.<\/p>\n<p>Question 6<br \/>\n56+32<\/p>\n<p>Estimate:<\/p>\n<p><span style=\"text-decoration: underline;\">\u00a0 \u00a0 \u00a0 \u00a0<\/span> \u00a0+<span style=\"text-decoration: underline;\">\u00a0 \u00a0 \u00a0 \u00a0<\/span> \u00a0= <span style=\"text-decoration: underline;\">\u00a0 \u00a0 \u00a0 \u00a0<\/span><\/p>\n<p>Answer:<br \/>\nThe number which is compatible to 56 is 50.<br \/>\nThe number compatible to 32 is 25<br \/>\n50<br \/>\n<span style=\"text-decoration: underline;\">25<\/span><br \/>\n75<\/p>\n<p><span style=\"text-decoration: underline;\">50<\/span> + <span style=\"text-decoration: underline;\">25<\/span> = <span style=\"text-decoration: underline;\">75<\/span><\/p>\n<p>Question 7<br \/>\n271+425<\/p>\n<p>Estimate:<\/p>\n<p><span style=\"text-decoration: underline;\">\u00a0 \u00a0 \u00a0 \u00a0<\/span> \u00a0+<span style=\"text-decoration: underline;\">\u00a0 \u00a0 \u00a0 \u00a0<\/span> \u00a0= <span style=\"text-decoration: underline;\">\u00a0 \u00a0 \u00a0 \u00a0<\/span><\/p>\n<p>Answer:<\/p>\n<p>The number close to 271 is 275<br \/>\n425 will be the same.<\/p>\n<p>275<br \/>\n<span style=\"text-decoration: underline;\">425<\/span><br \/>\n700<br \/>\n<span style=\"text-decoration: underline;\">425<\/span> + <span style=\"text-decoration: underline;\">275<\/span> = <span style=\"text-decoration: underline;\">700<\/span><\/p>\n<p>Question 8<br \/>\n328+127<\/p>\n<p>Estimate:<\/p>\n<p><span style=\"text-decoration: underline;\">\u00a0 \u00a0 \u00a0 \u00a0<\/span> \u00a0+<span style=\"text-decoration: underline;\">\u00a0 \u00a0 \u00a0 \u00a0<\/span> \u00a0= <span style=\"text-decoration: underline;\">\u00a0 \u00a0 \u00a0 \u00a0<\/span><\/p>\n<p>Answer:<\/p>\n<p>The number closer to 328 is 325<br \/>\nThe number closer to 127 is 125<br \/>\n<span style=\"text-decoration: underline;\">325<\/span> + <span style=\"text-decoration: underline;\">125<\/span> = <span style=\"text-decoration: underline;\">450<\/span><\/p>\n<p>Use mental math to find the sum.<\/p>\n<p>Question 9<br \/>\n46 + 14 =<\/p>\n<p>Answer: 60<\/p>\n<p>Explanation:<\/p>\n<p>Break apart the addends to make them compatible<br \/>\n46 = 40 + 6<br \/>\n14 = 10 + 4<br \/>\nNow add both<br \/>\n40 + 6<br \/>\n<span style=\"text-decoration: underline;\">10 + 4<\/span><br \/>\n50 + 10 = 60<br \/>\n46 + 14 = 60<\/p>\n<p>Question 10<br \/>\n39 + 243 =<\/p>\n<p>Answer: 282<\/p>\n<p>Explanation:<\/p>\n<p>Break apart the addends to make them compatible<br \/>\n39 = 35 + 4<br \/>\n243 = 240 + 3<br \/>\nNow add<br \/>\n240 + 3<br \/>\n<span style=\"text-decoration: underline;\">\u00a0 35 + 4<\/span><br \/>\n275 + 7<\/p>\n<p>275 + 7 = 282<br \/>\n39 + 243 = 282<\/p>\n<p>Question 11<br \/>\n326 + 402 =<\/p>\n<p>Answer: 728<\/p>\n<p>Explanation:<\/p>\n<p>Break apart the addends to make them compatible.<br \/>\n326 = 325 + 1<br \/>\n402 = 400 + 2<br \/>\nNow add<\/p>\n<p>325 + 1<br \/>\n<span style=\"text-decoration: underline;\">400 + 2<\/span><br \/>\n725 + 3 = 728<br \/>\n326 + 402 = 728<\/p>\n<p>Estimate. Then find the sum.<\/p>\n<p>Question 12<br \/>\n356+442<br \/>\nEstimate: <span style=\"text-decoration: underline;\">800<br \/>\n<\/span>Sum: <span style=\"text-decoration: underline;\">798<\/span><\/p>\n<p>Answer:<\/p>\n<p>356<br \/>\n<span style=\"text-decoration: underline;\">442<\/span><br \/>\n798<br \/>\nThe sum of 356 and 442 is 798<br \/>\nThe number close to 798 is 800.<br \/>\nTherefore the estimated sum is 800.<\/p>\n<p>Question 13<br \/>\n164+230<br \/>\nEstimate: <span style=\"text-decoration: underline;\">400<br \/>\n<\/span>Sum: <span style=\"text-decoration: underline;\">394<\/span><\/p>\n<p>Answer:<\/p>\n<p>230<br \/>\n<span style=\"text-decoration: underline;\">164<\/span><br \/>\n394<\/p>\n<p>The sum of 230 and 164 is 394<br \/>\nThe number 394 rounded to the nearest hundred is 400.<br \/>\nThus the estimated sum is 400.<\/p>\n<p>Question 14<br \/>\n545+139<br \/>\nEstimate: <span style=\"text-decoration: underline;\">700<br \/>\n<\/span>Sum: <span style=\"text-decoration: underline;\">684<\/span><\/p>\n<p>Answer:<\/p>\n<p>545<br \/>\n<span style=\"text-decoration: underline;\">139<\/span><br \/>\n684<\/p>\n<p>The sum of 545 and 139 is 684.<br \/>\n684 rounded to the nearest hundred is 700.<br \/>\nSo, the estimated difference is 700.<\/p>\n<p>Question 15<br \/>\n437+184<br \/>\nEstimate: <span style=\"text-decoration: underline;\">600<\/span><br \/>\nSum: <span style=\"text-decoration: underline;\">621<\/span><\/p>\n<p>Answer:<\/p>\n<p>437<br \/>\n<span style=\"text-decoration: underline;\">184<\/span><br \/>\n621<\/p>\n<p>The sum of 437 and 184 is 621<br \/>\n621 rounded to the nearest hundred is 600.<br \/>\nThe estimated sum is 600.<\/p>\n<h3><a id=\"Mid_Chapter_Check_Point_Vocabulary_Lesson_Check_Page No_48\"><\/a>Mid Chapter Check Point &#8211; Vocabulary Page No 48<\/h3>\n<p>Question 16<br \/>\nNancy planted 77 daisies, 48 roses, and 39 tulips. About how many roses and tulips did she plant?<\/p>\n<p>about <span style=\"text-decoration: underline;\">\u00a0 \u00a0 \u00a0 \u00a0<\/span> roses and tulips<\/p>\n<p>Answer: 90 roses and tulips<\/p>\n<p>Explanation:<\/p>\n<p>Given that, Nancy planted 77 daisies, 48 roses, and 39 tulips.<br \/>\nTo know how many roses and tulips did she plant<br \/>\nWe have to add a number of roses and a number of tulips.<br \/>\n48 and 39.<br \/>\nThe number closer to 48 is 50.<br \/>\nAnd the number closer to 39 is 40.<br \/>\nSo, the estimated sum is 90.<\/p>\n<p>Question 17<br \/>\nTomas collected 139 cans for recycling on Monday, and twice that number on Tuesday. How many cans did he collect on Tuesday?<\/p>\n<p><span style=\"text-decoration: underline;\">\u00a0 \u00a0 \u00a0 \u00a0<\/span> cans<\/p>\n<p>Answer: 278 cans<\/p>\n<p>Explanation:<\/p>\n<p>Tomas collected 139 cans for recycling on Monday, and twice that number on Tuesday.<br \/>\nTwice is nothing but double.<br \/>\n139 + 139 = 278<br \/>\nTherefore Tomas collected 278 cans on Tuesday.<\/p>\n<p>Question 18<br \/>\nThere are 294 boys and 332 girls in the Hill School. How many students are in the school?<\/p>\n<p><span style=\"text-decoration: underline;\">\u00a0 \u00a0 \u00a0 \u00a0<\/span> students<\/p>\n<p>Answer: 626 students<\/p>\n<p>Explanation:<\/p>\n<p>Given,<br \/>\nThere are 294 boys and 332 girls in the Hill School.<br \/>\nTo find the total number of students in the students<br \/>\nWe need to add the total number of boys and number of girls = 294 + 332<br \/>\n294<br \/>\n<span style=\"text-decoration: underline;\">332<\/span><br \/>\n626<br \/>\nSo, there are 626 students in the class.<\/p>\n<p>Question 19<br \/>\nMonday&#8217;s art group made 25 paper models. Tuesday&#8217;s group made 32 paper models. Wednesday&#8217;s group made 15 paper models. How many paper models did the groups make?<\/p>\n<p><span style=\"text-decoration: underline;\">\u00a0 \u00a0 \u00a0 \u00a0<\/span> paper models<\/p>\n<p>Answer: 72 paper models<\/p>\n<p>Explanation:<\/p>\n<p>Monday&#8217;s art group made 25 paper models.<br \/>\nTuesday&#8217;s group made 32 paper models.<br \/>\nWednesday&#8217;s group made 15 paper models.<br \/>\nAdd 25, 32 and 15<br \/>\n25<br \/>\n32<br \/>\n<span style=\"text-decoration: underline;\">15<\/span><br \/>\n72<\/p>\n<h3><a id=\"Estimate_Differences_Page No_53\"><\/a>Estimate Differences Page No 53<\/h3>\n<p>Use rounding or compatible numbers to estimate the difference.<\/p>\n<p>Question 1<br \/>\n40 &#8211; 13 =\u00a0<span style=\"text-decoration: underline;\"><br \/>\n<\/span>40 &#8211; 10<span style=\"text-decoration: underline;\"><br \/>\n<\/span>Estimate: 30<\/p>\n<p>Question 2<br \/>\n762 &#8211; 332<\/p>\n<p>Estimate:<\/p>\n<p><span style=\"text-decoration: underline;\">\u00a0 \u00a0 \u00a0 \u00a0<\/span> \u00a0&#8211; <span style=\"text-decoration: underline;\">\u00a0 \u00a0 \u00a0 \u00a0<\/span> \u00a0= <span style=\"text-decoration: underline;\">\u00a0 \u00a0 \u00a0 \u00a0<\/span><\/p>\n<p>Estimate: 500<\/p>\n<p>The number closer to 762 is 800<br \/>\nThe number closer to 332 is 300<br \/>\nThe difference between 800 and 300 is 500<\/p>\n<p>Question 3<br \/>\n823 &#8211; 242<\/p>\n<p>Estimate:<\/p>\n<p><span style=\"text-decoration: underline;\">\u00a0 \u00a0 \u00a0 \u00a0<\/span> \u00a0&#8211; <span style=\"text-decoration: underline;\">\u00a0 \u00a0 \u00a0 \u00a0<\/span> \u00a0= <span style=\"text-decoration: underline;\">\u00a0 \u00a0 \u00a0 \u00a0<\/span><\/p>\n<p>Estimate: 550<\/p>\n<p>The number 823 rounded to the nearest hundred is 800.<br \/>\nThe number closer to 242 is 250<br \/>\n800<br \/>\n<span style=\"text-decoration: underline;\">-250<\/span><br \/>\n550<\/p>\n<p>Question 4<br \/>\n98 &#8211; 49<\/p>\n<p>Estimate:<\/p>\n<p><span style=\"text-decoration: underline;\">\u00a0 \u00a0 \u00a0 \u00a0<\/span> \u00a0&#8211; <span style=\"text-decoration: underline;\">\u00a0 \u00a0 \u00a0 \u00a0<\/span> \u00a0= <span style=\"text-decoration: underline;\">\u00a0 \u00a0 \u00a0 \u00a0<\/span><\/p>\n<p>Estimate: 50<\/p>\n<p>The number closer to 98 is 100<br \/>\nThe round number of 49 is 50.<br \/>\n100<br \/>\n<span style=\"text-decoration: underline;\">-50<\/span><br \/>\n50<\/p>\n<p>Question 5<br \/>\n287 &#8211; 162<\/p>\n<p>Estimate:<\/p>\n<p><span style=\"text-decoration: underline;\">\u00a0 \u00a0 \u00a0 \u00a0<\/span> \u00a0&#8211; <span style=\"text-decoration: underline;\">\u00a0 \u00a0 \u00a0 \u00a0<\/span> \u00a0= <span style=\"text-decoration: underline;\">\u00a0 \u00a0 \u00a0 \u00a0<\/span><\/p>\n<p>Estimate: 100<\/p>\n<p>282 rounded to the nearest hundred is 300<br \/>\n162 rounded to the nearest hundred is 200<br \/>\n300<br \/>\n<span style=\"text-decoration: underline;\">-200<\/span><br \/>\n100<\/p>\n<p>Question 6<br \/>\n359 &#8211; 224<\/p>\n<p>Estimate:<\/p>\n<p><span style=\"text-decoration: underline;\">\u00a0 \u00a0 \u00a0 \u00a0<\/span> \u00a0&#8211; <span style=\"text-decoration: underline;\">\u00a0 \u00a0 \u00a0 \u00a0<\/span> \u00a0= <span style=\"text-decoration: underline;\">\u00a0 \u00a0 \u00a0 \u00a0<\/span><\/p>\n<p>Estimate: 125<\/p>\n<p>The number closer to 359 is 350<br \/>\nThe number closer to 224 is 225<br \/>\n350<br \/>\n<span style=\"text-decoration: underline;\">-225<\/span><br \/>\n125<\/p>\n<p>Question 7<br \/>\n68 &#8211; 31<\/p>\n<p>Estimate:<\/p>\n<p><span style=\"text-decoration: underline;\">\u00a0 \u00a0 \u00a0 \u00a0<\/span> \u00a0&#8211; <span style=\"text-decoration: underline;\">\u00a0 \u00a0 \u00a0 \u00a0<\/span> \u00a0= <span style=\"text-decoration: underline;\">\u00a0 \u00a0 \u00a0 \u00a0<\/span><\/p>\n<p>Estimate: 40<br \/>\nThe round number of 68 is 70<br \/>\nThe number closer to 31 is 30<br \/>\n70<br \/>\n<span style=\"text-decoration: underline;\">-30<\/span><br \/>\n40<\/p>\n<p>Question 8<br \/>\n476 &#8211; 155<\/p>\n<p>Estimate:<\/p>\n<p><span style=\"text-decoration: underline;\">\u00a0 \u00a0 \u00a0 \u00a0<\/span>\u00a0 &#8211; <span style=\"text-decoration: underline;\">\u00a0 \u00a0 \u00a0 \u00a0<\/span> \u00a0= <span style=\"text-decoration: underline;\">\u00a0 \u00a0 \u00a0 \u00a0<\/span><\/p>\n<p>Estimate: 325<\/p>\n<p>The number closer to 476 is 475<br \/>\nThe number closer to 155 is 150<br \/>\n475<br \/>\n<span style=\"text-decoration: underline;\">-150<\/span><br \/>\n325<\/p>\n<p>Question 9<br \/>\n622 &#8211; 307<\/p>\n<p>Estimate:<\/p>\n<p><span style=\"text-decoration: underline;\">\u00a0 \u00a0 \u00a0 \u00a0<\/span> \u00a0&#8211; <span style=\"text-decoration: underline;\">\u00a0 \u00a0 \u00a0 \u00a0<\/span> \u00a0= <span style=\"text-decoration: underline;\">\u00a0 \u00a0 \u00a0 \u00a0<\/span><\/p>\n<p>Estimate: 300<\/p>\n<p>622 nearest to the hundred is 600<br \/>\n307 nearest to the hundred is 300<br \/>\n600<br \/>\n<span style=\"text-decoration: underline;\">-300<\/span><br \/>\n300<\/p>\n<p>Question 10<br \/>\n771 &#8211; 531<\/p>\n<p>Estimate:<\/p>\n<p><span style=\"text-decoration: underline;\">\u00a0 \u00a0 \u00a0 \u00a0<\/span> \u00a0+<span style=\"text-decoration: underline;\">\u00a0 \u00a0 \u00a0 \u00a0<\/span> \u00a0= <span style=\"text-decoration: underline;\">\u00a0 \u00a0 \u00a0 \u00a0<\/span><\/p>\n<p>Estimate: 225<\/p>\n<p>The number closer to 771 is 775<br \/>\n531 nearest to ten is 550<br \/>\n775<br \/>\n<span style=\"text-decoration: underline;\">550<\/span><br \/>\n225<\/p>\n<p>Question 11<br \/>\n299 &#8211; 61<\/p>\n<p>Estimate:<\/p>\n<p><span style=\"text-decoration: underline;\">\u00a0 \u00a0 \u00a0 \u00a0<\/span> \u00a0+<span style=\"text-decoration: underline;\">\u00a0 \u00a0 \u00a0 \u00a0<\/span> \u00a0= <span style=\"text-decoration: underline;\">\u00a0 \u00a0 \u00a0 \u00a0<\/span><\/p>\n<p>Estimate: 240<\/p>\n<p>The number closer to 299 is 300<br \/>\nThe number closer to 61 is 60<br \/>\n300<br \/>\n<span style=\"text-decoration: underline;\">-60<\/span><br \/>\n240<\/p>\n<p>Problem Solving<\/p>\n<p>Question 12<br \/>\nBen has a collection of 812 stamps. He gives his brother 345 stamps. About how many stamps does Ben have left?<\/p>\n<p>About <span style=\"text-decoration: underline;\">\u00a0 \u00a0 \u00a0 \u00a0<\/span> stamps<\/p>\n<p>Answer: About 450 stamps<\/p>\n<p>Explanation:<\/p>\n<p>Ben has a collection of 812 stamps. He gives his brother 345 stamps.<br \/>\n812 to the nearest hundred is 800<br \/>\n345 to the nearest ten is 350<br \/>\n800<br \/>\n<span style=\"text-decoration: underline;\">-350<\/span><br \/>\n450<br \/>\nThus about 450 stamps are left.<\/p>\n<p>Question 13<br \/>\nDanika is making necklaces. She has 512 silver beads and 278 blue beads. About how many more silver than blue beads does Danika have?<\/p>\n<p>About <span style=\"text-decoration: underline;\">\u00a0 \u00a0 \u00a0 \u00a0<\/span> more silver than blue beads<\/p>\n<p>Answer: About 200 more silver than blue beads<\/p>\n<p>Explanation:<\/p>\n<p>Given,<br \/>\nDanika is making necklaces.<br \/>\nShe has 512 silver beads and 278 blue beads.<br \/>\nThe number closer to 512 is 500<br \/>\n278 to the nearest hundred is 300<br \/>\nThe difference between 500 and 300 is 200.<br \/>\nTherefore Danika has about 200 more silver than blue beads.<\/p>\n<h3><a id=\"Estimate_Differences_Lesson_Check_Page No_54\"><\/a>Lesson Check Page No 54<\/h3>\n<p>Question 1<br \/>\nJorge has 708 baseball cards and 394 basketball cards. About how many more baseball cards than basketball cards does Jorge have?<\/p>\n<p>(a) about 200<br \/>\n(b) about 300<br \/>\n(c) about 400<br \/>\n(d) about 500<\/p>\n<p>Answer: about 300<\/p>\n<p>Explanation:<\/p>\n<p>Jorge has 708 baseball cards and 394 basketball cards.<br \/>\nThe number closer to 708 is 700.<br \/>\nThe number closer to 394 is 400<br \/>\n700<br \/>\n<span style=\"text-decoration: underline;\">-400<\/span><br \/>\n300<br \/>\nSo, the correct answer is option A.<\/p>\n<p>Question 2<br \/>\nDanika is making necklaces. She has 512 silver beads and 278 blue beads. About how many more silver than blue beads does Danika have?<\/p>\n<p>(a) about 200<br \/>\n(b) about 300<br \/>\n(c) about 400<br \/>\n(d) about 800<\/p>\n<p>Answer: about 200<\/p>\n<p>Explanation:<\/p>\n<p>Danika is making necklaces. She has 512 silver beads and 278 blue beads.<br \/>\nThe number closer to 512 is 500<br \/>\n278 to the nearest hundred is 300<br \/>\nThe difference between 500 and 300 is 200.<br \/>\nTherefore Danika has about 200 more silver than blue beads.<br \/>\nSo, the correct answer is option A.<\/p>\n<p>Spiral Review<br \/>\nQuestion 3<br \/>\nA store manager ordered 402 baseball caps and 122 ski caps. Which is the best estimate of the total number of caps the manager ordered?<\/p>\n<p>(a) 300<br \/>\n(b) 500<br \/>\n(c) 600<br \/>\n(d) 700<\/p>\n<p>Answer: 500<\/p>\n<p>Explanation:<\/p>\n<p>A store manager ordered 402 baseball caps and 122 ski caps.<br \/>\nTo find the best estimate of the total number of caps the manager ordered<br \/>\nWe have to add baseball caps and ski caps.<br \/>\nThe number closer to 402 is 400<br \/>\nThe number closer to 122 is 100.<br \/>\n400 + 100 = 500<br \/>\nSo, the correct answer is option B.<\/p>\n<p>Question 4<br \/>\nAutumn collected 129 seashells at the beach. What is 129 rounded to the nearest ten?<\/p>\n<p>(a) 100<br \/>\n(b) 120<br \/>\n(c) 130<br \/>\n(d) 200<\/p>\n<p>Answer: 130<\/p>\n<p>Explanation:<\/p>\n<p>Autumn collected 129 seashells at the beach.<br \/>\n129 rounded to the nearest ten is 130<br \/>\nSo, the correct answer is option C.<\/p>\n<p>Question 5<br \/>\nFind the sum.<\/p>\n<p>585 + 346<\/p>\n<p>(a) 239<br \/>\n(b) 821<br \/>\n(c) 900<br \/>\n(d) 931<\/p>\n<p>Answer: 931<\/p>\n<p>585<br \/>\n<span style=\"text-decoration: underline;\">+346<\/span><br \/>\n931<br \/>\nThe correct answer is option D.<\/p>\n<p>Question 6<br \/>\nJulie made $22, $55, $38, and $25 babysitting. How much did she make in all babysitting?<\/p>\n<p>(a) $102<br \/>\n(b) $115<br \/>\n(c) $140<br \/>\n(d) $165<\/p>\n<p>Answer: $140<\/p>\n<p>Explanation:<\/p>\n<p>Julie made $22, $55, $38, and $25 babysitting.<br \/>\nPut all the numbers in the order<br \/>\n22<br \/>\n55<br \/>\n38<br \/>\n<span style=\"text-decoration: underline;\">+25<\/span><br \/>\n140<br \/>\nSo, the correct answer is option C.<\/p>\n<h3><a id=\"Mental_Math_Strategies_for_Subtraction _Page No_59\"><\/a>Mental Math Strategies for Subtraction Page No &#8211; 59<\/h3>\n<p>Use mental math to find the difference.<br \/>\nDraw or describe the strategy you use.<br \/>\nQuestion 1:<br \/>\n74 &#8211; 39 = 35<\/p>\n<p><img loading=\"lazy\" class=\"alignnone size-full wp-image-295\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2020\/06\/Go-Math-Grade-3-Chapter-1-Mental-Math-Strategies-for-Subtraction.jpg\" alt=\"Go Math Grade 3 Chapter 1 Mental Math Strategies for Subtraction\" width=\"393\" height=\"105\" srcset=\"https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2020\/06\/Go-Math-Grade-3-Chapter-1-Mental-Math-Strategies-for-Subtraction.jpg 393w, https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2020\/06\/Go-Math-Grade-3-Chapter-1-Mental-Math-Strategies-for-Subtraction-300x80.jpg 300w\" sizes=\"(max-width: 393px) 100vw, 393px\" \/><\/p>\n<p>Question 2<br \/>\n93 &#8211; 28 =<\/p>\n<p>Answer: 65<\/p>\n<p>I use friendly numbers.<br \/>\nAdd 2 to the 93.<br \/>\n93 + 2 = 95<br \/>\nAdd 2 to 28<br \/>\n28 + 2 = 30<br \/>\n95 &#8211; 30 = 65<\/p>\n<p>Question 3<br \/>\n51 &#8211; 9 =<\/p>\n<p>Answer: 42<br \/>\nI used friendly numbers to subtract 9 from 51.<br \/>\nNow add 1 to 9<br \/>\n9 + 1 = 10<br \/>\nNow subtract 10 from 51<br \/>\n51 &#8211; 10 = 41<br \/>\nNow add 1 to 41<br \/>\n41 + 1 = 42<\/p>\n<p>Question 4<br \/>\n76 &#8211; 23 =<\/p>\n<p>Answer:<\/p>\n<p>I used friendly numbers<br \/>\nSubtract 1 from 76<br \/>\n76 &#8211; 1 = 75<br \/>\n75 &#8211; 23 = 52<br \/>\nNow add 1 to 52<br \/>\n52 + 1 = 53.<br \/>\n76 &#8211; 23 = 53<\/p>\n<p>Question 5<br \/>\n357 &#8211; 214 =<\/p>\n<p>Answer:<\/p>\n<p>I use break apart strategy.<br \/>\n300 &#8211; 200 = 100<br \/>\n50 &#8211; 10 = 40<br \/>\n7 &#8211; 4 = 3<br \/>\n100 + 40 + 3 = 143<br \/>\n357 &#8211; 214 = 143<\/p>\n<p>Question 6<br \/>\n285 &#8211; 99 =<\/p>\n<p>Answer:<\/p>\n<p>I used friendly numbers.<br \/>\nThe number close to 99 is 100<br \/>\n285 &#8211; 100 = 185<br \/>\nNow add 1 to 185<br \/>\n185 + 1 = 186<br \/>\n285 &#8211; 99 = 186<\/p>\n<p>Problem Solving<br \/>\nQuestion 7<br \/>\nRuby has 78 books. Thirty-one of the books are on shelves. The rest are still packed in boxes. How many of Ruby\u2019s books are still in boxes?<\/p>\n<p><span style=\"text-decoration: underline;\">\u00a0 \u00a0 \u00a0 \u00a0<\/span> books<\/p>\n<p>Answer: 47 books<\/p>\n<p>Explanation:<\/p>\n<p>Ruby has 78 books. Thirty-one of the books are on shelves. The rest are still packed in boxes.<br \/>\nTo know the remaining books in the boxes.<br \/>\nSubtract 31 from 78.<br \/>\n78 &#8211; 31<br \/>\n70 &#8211; 30 = 40<br \/>\n8 &#8211; 1 = 7<br \/>\n40 + 7 = 47 books<br \/>\nTherefore 47 of Ruby\u2019s books are still in boxes.<\/p>\n<p>Question 8<br \/>\nKyle has 130 pins in his collection. He has 76 of the pins displayed on his wall. The rest are in a drawer. How many of Kyle\u2019s pins are in a drawer?<\/p>\n<p><span style=\"text-decoration: underline;\">\u00a0 \u00a0 \u00a0 \u00a0<\/span> pins<\/p>\n<p>Answer: 54 pins<\/p>\n<p>Explanation:<\/p>\n<p>Kyle has 130 pins in his collection.<br \/>\nHe has 76 of the pins displayed on his wall. The rest are in a drawer.<br \/>\n130 &#8211; 76 = 54<br \/>\nThus there are 54 pins in a drawer.<\/p>\n<h3><a id=\"Mental_Math_Strategies_for_Subtraction _Lesson_Check_Page No_60\"><\/a>Lesson Check Page No &#8211; 60<\/h3>\n<p>Question 1<br \/>\nOne day, a baker made 54 fruit pies. At the end of the day, only 9 of the pies were NOT sold. How many pies were sold that day?<\/p>\n<p>(a) 43<br \/>\n(b) 45<br \/>\n(c) 63<br \/>\n(d) 65<\/p>\n<p>Answer: 45<\/p>\n<p>Explanation:<\/p>\n<p>Given,<br \/>\nOne day, a baker made 54 fruit pies.<br \/>\nAt the end of the day, only 9 of the pies were NOT sold.<br \/>\nNumber of pies sold that day = x<br \/>\nx + 9 = 54<br \/>\nx = 54 &#8211; 9 = 45<br \/>\nx = 45<br \/>\nTherefore the number of pies sold that day = 45<br \/>\nSo, the correct answer is option B.<\/p>\n<p>Question 2<br \/>\nGeorge\u2019s father bought a 50-pound bag of wild bird seed. At the end of two weeks, 36 pounds of seed were left in the bag. How many pounds of seed had been used?<\/p>\n<p>(a) 14 pounds<br \/>\n(b) 24 pounds<br \/>\n(c) 26 pounds<br \/>\n(d) 86 pounds<\/p>\n<p>Answer: 14 pounds<\/p>\n<p>Explanation:<\/p>\n<p>George\u2019s father bought a 50-pound bag of wild bird seed.<br \/>\nAt the end of two weeks, 36 pounds of seed were left in the bag.<br \/>\nNumber of pounds used = x<br \/>\nx + 36 = 50<br \/>\nx = 50 &#8211; 36<br \/>\nx = 14<br \/>\nTherefore George\u2019s father used 14 pounds.<br \/>\nThe correct answer is option A.<\/p>\n<p>Spiral Review<br \/>\nQuestion 3<br \/>\nFor a party, Shaun blew up 36 red balloons, 28 white balloons, and 24 blue balloons. How many balloons did he blow up in all?<\/p>\n<p>(a) 78<br \/>\n(b) 81<br \/>\n(c) 87<br \/>\n(d) 88<\/p>\n<p>Answer: 88<\/p>\n<p>Explanation:<\/p>\n<p>For a party, Shaun blew up 36 red balloons, 28 white balloons, and 24 blue balloons.<br \/>\nTotal number of balloons = 36 + 28 + 24<br \/>\n36<br \/>\n28<br \/>\n<span style=\"text-decoration: underline;\">+24<\/span><br \/>\n88<br \/>\nSo, the answer is option D.<\/p>\n<p>Question 4<br \/>\nTiffany has read 115 pages of her book. She has 152 pages left to read. How many pages are in the book?<\/p>\n<p>(a) 37<br \/>\n(b) 267<br \/>\n(c) 277<br \/>\n(d) 367<\/p>\n<p>Answer: 267<\/p>\n<p>Explanation:;<\/p>\n<p>Tiffany has read 115 pages of her book.<br \/>\nShe has 152 pages left to read.<br \/>\nTotal number of pages = 152 + 115<br \/>\n152<br \/>\n<span style=\"text-decoration: underline;\">+115<\/span><br \/>\n267<\/p>\n<p>Question 5<br \/>\nThe flower shop had 568 flowers on Monday. By Tuesday, the shop had 159 flowers left. About how many flowers had been sold?<\/p>\n<p>(a) about 200<br \/>\n(b) about 300<br \/>\n(c) about 400<br \/>\n(d) about 500<\/p>\n<p>Answer: about 400<\/p>\n<p>Explanation:<\/p>\n<p>The flower shop had 568 flowers on Monday.<br \/>\nBy Tuesday, the shop had 159 flowers left.<br \/>\nThe number closer to 568 is 600.<br \/>\nThe number closer to 159 is 200<br \/>\nSubtract 200 from 600.<br \/>\n600 &#8211; 200 = 400<br \/>\nThe correct answer is option C.<\/p>\n<p>Question 6<br \/>\nThere are 383 books in one section of the school library. Of the books, 165 are fiction books. Which is the best estimate of the number of books in that section that are NOT fiction?<\/p>\n<p>(a) about 200<br \/>\n(b) about 300<br \/>\n(c) about 400<br \/>\n(d) about 500<\/p>\n<p>Answer: about 200<\/p>\n<p>Explanation:<\/p>\n<p>There are 383 books in one section of the school library.<br \/>\nOf the books, 165 are fiction books.<br \/>\n383 to the nearest hundred is 400.<br \/>\n165 to the nearest hundred is 200<br \/>\n400 &#8211; 200 = 200<br \/>\nSo, the correct answer is option A.<\/p>\n<h3><a id=\"Use_Place_Value_to_Subtract_Page No_65\"><\/a>Use Place Value to Subtract Page No 65<\/h3>\n<p>Estimate. Then find the difference.<\/p>\n<p>Question 1<br \/>\nEstimate: <span style=\"text-decoration: underline;\">500<\/span><\/p>\n<p>585 &#8211; 119<\/p>\n<p>Subtract 119 from 585<\/p>\n<p>585<br \/>\n<span style=\"text-decoration: underline;\">119<\/span><br \/>\n466<br \/>\n585 &#8211; 119 = 466<\/p>\n<p>Question 2<br \/>\n738 &#8211; 227<\/p>\n<p>Estimate: 5<span style=\"text-decoration: underline;\">00<\/span><\/p>\n<p>Difference: <span style=\"text-decoration: underline;\">511<\/span><\/p>\n<p>Subtract 227 from 738<br \/>\n738<br \/>\n<span style=\"text-decoration: underline;\">227<\/span><br \/>\n511<br \/>\nThe estimated difference of 511 is 500.<br \/>\n738 &#8211; 227 = 511<\/p>\n<p>Question 3<br \/>\n651 &#8211; 376<br \/>\nEstimate: <span style=\"text-decoration: underline;\">300<\/span><br \/>\nDifference: <span style=\"text-decoration: underline;\">275<\/span><\/p>\n<p>Subtract 376 from 651<br \/>\n651<br \/>\n<span style=\"text-decoration: underline;\">376<\/span><br \/>\n275<br \/>\n651 &#8211; 376 = 275<br \/>\nThe estimated difference is 300<\/p>\n<p>Question 4<br \/>\n815 &#8211; 281<br \/>\nEstimate: <span style=\"text-decoration: underline;\">500\u00a0<\/span><br \/>\nDifference: <span style=\"text-decoration: underline;\">534<\/span><\/p>\n<p>Subtract 281 from 815<\/p>\n<p>815<br \/>\n<span style=\"text-decoration: underline;\">281<\/span><br \/>\n534<br \/>\n815 &#8211; 281 = 534<br \/>\nThe estimated difference is 500<\/p>\n<p>Question 5<br \/>\n487 &#8211; 290<\/p>\n<p>Estimate: <span style=\"text-decoration: underline;\">200<br \/>\n<\/span>Difference: <span style=\"text-decoration: underline;\">197<\/span><\/p>\n<p>487<br \/>\n<span style=\"text-decoration: underline;\">290<\/span><br \/>\n197<br \/>\n487 &#8211; 290 = 197<br \/>\nThe estimated difference is 200.<\/p>\n<p>Question 6<br \/>\n936 &#8211; 329<\/p>\n<p>Estimate: <span style=\"text-decoration: underline;\">600<\/span><br \/>\nDifference: <span style=\"text-decoration: underline;\">607<\/span><\/p>\n<p>936<br \/>\n<span style=\"text-decoration: underline;\">329<\/span><br \/>\n607<br \/>\n936 &#8211; 329 = 607<br \/>\nThe estimated difference is 600.<\/p>\n<p>Question 7<br \/>\n270 &#8211; 128<\/p>\n<p>Estimate: <span style=\"text-decoration: underline;\">140<\/span><br \/>\nDifference: <span style=\"text-decoration: underline;\">142<\/span><\/p>\n<p>Subtract 128 from 270<br \/>\n270<br \/>\n<span style=\"text-decoration: underline;\">128<\/span><br \/>\n142<br \/>\n270 &#8211; 128 = 142<br \/>\nThe estimated difference is 140.<\/p>\n<p>Question 8<br \/>\n364 &#8211; 177<\/p>\n<p>Estimate: <span style=\"text-decoration: underline;\">200<br \/>\n<\/span>Difference: <span style=\"text-decoration: underline;\">187<\/span><\/p>\n<p>Subtract 177 from 364<br \/>\n364<br \/>\n<span style=\"text-decoration: underline;\">177<\/span><br \/>\n187<br \/>\n364 &#8211; 177 = 187<br \/>\nThe estimated difference is 200.<\/p>\n<p>Question 9<br \/>\n627 &#8211; 253<\/p>\n<p>Estimate: <span style=\"text-decoration: underline;\">400<\/span><br \/>\nDifference: <span style=\"text-decoration: underline;\">374<\/span><\/p>\n<p>Subtract 253 from 627<br \/>\n627<br \/>\n<span style=\"text-decoration: underline;\">253<\/span><br \/>\n374<br \/>\n627 &#8211; 253 = 374<br \/>\nThe estimated difference is 374<\/p>\n<p>Question 10<br \/>\n862 &#8211; 419<\/p>\n<p>Estimate: <span style=\"text-decoration: underline;\">450<\/span><br \/>\nDifference: <span style=\"text-decoration: underline;\">443<\/span><\/p>\n<p>Subtract 419 from 862<br \/>\n862<br \/>\n<span style=\"text-decoration: underline;\">419<\/span><br \/>\n443<br \/>\n862 &#8211; 419 = 443<br \/>\nThe estimated difference is 450.<\/p>\n<p>Question 11<br \/>\n726 &#8211; 148<\/p>\n<p>Estimate: <span style=\"text-decoration: underline;\">550<\/span><br \/>\nDifference: <span style=\"text-decoration: underline;\">578<\/span><\/p>\n<p>Subtract 148 from 726<br \/>\n726<br \/>\n<span style=\"text-decoration: underline;\">148<\/span><br \/>\n578<br \/>\n726 &#8211; 148 = 578<br \/>\nThe estimated difference is 550.<\/p>\n<p>Question 12<br \/>\n543 &#8211; 358<\/p>\n<p>Estimate: <span style=\"text-decoration: underline;\">200<br \/>\n<\/span>Difference: <span style=\"text-decoration: underline;\">185<\/span><\/p>\n<p>Subtract 358 from 543<br \/>\n543<br \/>\n<span style=\"text-decoration: underline;\">358<\/span><br \/>\n185<br \/>\n543 &#8211; 358 = 185<br \/>\nThe estimated difference is 200.<\/p>\n<p>Problem Solving<br \/>\nQuestion 13<br \/>\nMrs. Cohen has 427 buttons. She uses 195 buttons to make puppets. How many buttons does Mrs. Cohen have left?<\/p>\n<p><span style=\"text-decoration: underline;\">\u00a0 \u00a0 \u00a0 \u00a0<\/span> buttons<\/p>\n<p>Answer: 232 buttons<\/p>\n<p>Explanation:<\/p>\n<p>Mrs. Cohen has 427 buttons.<br \/>\nShe uses 195 buttons to make puppets.<br \/>\nTo find how many buttons left, we have to subtract number of buttons she used to make puppets from the total number of buttons.<br \/>\n427 &#8211; 195 = 232<br \/>\nTherefore 232 buttons are left.<\/p>\n<p>Question 14<br \/>\nThere were 625 ears of corn and 247 tomatoes sold at a farm stand. How many more ears of corn were sold than tomatoes?<\/p>\n<p><span style=\"text-decoration: underline;\">\u00a0 \u00a0 \u00a0 \u00a0<\/span> more ears<\/p>\n<p>Answer: 378 more ears of corn<\/p>\n<p>Explanation:<\/p>\n<p>There were 625 ears of corn and 247 tomatoes sold at a farm stand.<br \/>\nTo know number of ears of corn were sold than tomatoes we have to subtract 247 from 625<br \/>\n625<br \/>\n<span style=\"text-decoration: underline;\">-247<\/span><br \/>\n378<br \/>\nThus 378 more ears of corn were sold than tomatoes.<\/p>\n<h3><a id=\"Use_Place_Value_to_Subtract_Lesson_Check_Page No_66\"><\/a>Use Place Value to Subtract Page No 66<\/h3>\n<p>Question 1<br \/>\nOn Saturday, 453 people go to a school play. On Sunday, 294 people go to the play. How many more people go to the play on Saturday?<\/p>\n<p>(a) 159<br \/>\n(b) 169<br \/>\n(c) 259<br \/>\n(d) 747<\/p>\n<p>Answer: 159<\/p>\n<p>Explanation:<\/p>\n<p>On Saturday, 453 people go to a school play. On Sunday, 294 people go to the play.<br \/>\nTo find how many more people go to the play on Saturday<br \/>\nWe need to subtract number of people go to the play on Sunday from the number of people go to the play on Saturday<br \/>\n= 453 &#8211; 294 = 159<br \/>\n159 more people go to the play on Saturday.<br \/>\nThus the correct answer is option A.<\/p>\n<p>Question 2<br \/>\nCorey has 510 marbles. He fills one jar with 165 marbles. How many of Corey\u2019s marbles are NOT in the jar?<\/p>\n<p>(a) 675<br \/>\n(b) 455<br \/>\n(c) 350<br \/>\n(d) 345<\/p>\n<p>Answer: 345<\/p>\n<p>Explanation:<\/p>\n<p>Corey has 510 marbles.<br \/>\nHe fills one jar with 165 marbles.<br \/>\nLet the number of Corey\u2019s marbles are NOT in the jar be x<br \/>\nx + 165 = 510<br \/>\nx = 510 &#8211; 165<br \/>\nx = 345<br \/>\nTherefore 345 marbles are NOT in the jar.<br \/>\nThe correct answer is option D.<\/p>\n<p>Spiral Review<br \/>\nQuestion 3<br \/>\nPattie brought 64 peppers to sell at the farmers\u2019 market. There were 12 peppers left at the end of the day. How many peppers did Pattie sell?<\/p>\n<p>(a) 50<br \/>\n(b) 52<br \/>\n(c) 62<br \/>\n(d) 78<\/p>\n<p>Answer: 52<\/p>\n<p>Explanation:<\/p>\n<p>Pattie brought 64 peppers to sell at the farmers\u2019 market.<br \/>\nThere were 12 peppers left at the end of the day.<br \/>\nTo find number of peppers did Pattie sell<br \/>\nSubtract 12 from 64<br \/>\n64 &#8211; 12 = 52<br \/>\nThe correct answer is option B.<\/p>\n<p>Question 4<br \/>\nAn airplane flies 617 miles in the morning. Then it flies 385 miles in the afternoon. About how many more miles does the airplane fly in the morning?<\/p>\n<p>(a) about 100 miles<br \/>\n(b) about 200 miles<br \/>\n(c) about 300 miles<br \/>\n(d) about 900 miles<\/p>\n<p>Answer: about\u00a0200 miles<\/p>\n<p>Explanation:<\/p>\n<p>An airplane flies 617 miles in the morning.<br \/>\nThen it flies 385 miles in the afternoon.<br \/>\nHere we have to use the concept of estimated difference.<br \/>\nThe number closer to 617 is 600<br \/>\nThe number closer to 385 is 400<br \/>\n600 &#8211; 400 = 200<br \/>\nAbout 200 miles airplane fly in the morning.<br \/>\nSo, the correct answer is option B.<\/p>\n<p>Question 5<br \/>\nWhat is the unknown number?<\/p>\n<p>(\u25a0 + 4) + 59 = 70<\/p>\n<p>(a) 4<br \/>\n(b) 6<br \/>\n(c) 7<br \/>\n(d) 8<\/p>\n<p>Answer: 7<\/p>\n<p>Explanation:<\/p>\n<p>Let \u25a0 be the unknown number<br \/>\n(\u25a0 + 4) + 59 = 70<br \/>\n(\u25a0 + 4) = 70 &#8211; 59<br \/>\n(\u25a0 + 4) = 11<br \/>\n(\u25a0 = 11 &#8211; 4<br \/>\n\u25a0 = 7<br \/>\nThus the correct answer is option C.<\/p>\n<p>Question 6<br \/>\nDexter has 128 shells. He needs 283 more shells for his art project. How many shells will Dexter use for his art project?<\/p>\n<p>(a) 155<br \/>\n(b) 165<br \/>\n(c) 401<br \/>\n(d) 411<\/p>\n<p>Answer: 411<\/p>\n<p>Explanation:<\/p>\n<p>Dexter has 128 shells. He needs 283 more shells for his art project.<br \/>\nTo know the total number of shells that Dexter used for his art project<br \/>\nyou need to add 128 and 283<br \/>\n283 + 128 = 411<br \/>\nSo, the correct answer is option D.<\/p>\n<h3><a id=\"Combine_Place_Values_to_Subtract_Page No_71\"><\/a>Combine Place Values to Subtract Page No &#8211; 71<\/h3>\n<p>Estimate. Then find the difference.<\/p>\n<p>Question 1<br \/>\nEstimate: <span style=\"text-decoration: underline;\">200<\/span><\/p>\n<p>476 &#8211; 269<\/p>\n<p>476<br \/>\n<span style=\"text-decoration: underline;\">-269<\/span><br \/>\n207<br \/>\nThe estimated difference is 200.<\/p>\n<p>Question 2<br \/>\n615 &#8211; 342<\/p>\n<p>Estimate: <span style=\"text-decoration: underline;\">300<br \/>\n<\/span>Difference: <span style=\"text-decoration: underline;\">273<\/span><\/p>\n<p>615<br \/>\n<span style=\"text-decoration: underline;\">-342<\/span><br \/>\n273<br \/>\nThe difference between 615 and 342 is 273<br \/>\nThe estimated difference is 300.<\/p>\n<p>Question 3<br \/>\n508 &#8211; 113<\/p>\n<p>Estimate: <span style=\"text-decoration: underline;\">400<br \/>\n<\/span>Difference: <span style=\"text-decoration: underline;\">395<\/span><\/p>\n<p>508<br \/>\n<span style=\"text-decoration: underline;\">-113<\/span><br \/>\n395<br \/>\nThe difference between 508 and 113 is 395<br \/>\nThe estimated difference is 400<\/p>\n<p>Question 4<br \/>\n716 &#8211; 229<\/p>\n<p>Estimate: <span style=\"text-decoration: underline;\">500<br \/>\n<\/span>Difference: <span style=\"text-decoration: underline;\">487<\/span><\/p>\n<p>716<br \/>\n<span style=\"text-decoration: underline;\">229<\/span><br \/>\n487<br \/>\nThe number closer to 487 is 500.<br \/>\nThe difference is 487.<\/p>\n<p>Question 5<br \/>\n700 &#8211; 326<\/p>\n<p>Estimate: <span style=\"text-decoration: underline;\">400<\/span><br \/>\nDifference: <span style=\"text-decoration: underline;\">374<\/span><\/p>\n<p>700<br \/>\n<span style=\"text-decoration: underline;\">326<\/span><br \/>\n374<br \/>\nThe number closer to 374 is 400.<br \/>\nThe difference is 374.<\/p>\n<p>Question 6<br \/>\n325 &#8211; 179<\/p>\n<p>Estimate: <span style=\"text-decoration: underline;\">100<\/span><br \/>\nDifference: <span style=\"text-decoration: underline;\">146<\/span><\/p>\n<p>325<br \/>\n<span style=\"text-decoration: underline;\">179<\/span><br \/>\n146<br \/>\nThe number closer to 146 is 100<br \/>\nThe difference is 146.<\/p>\n<p>Question 7<br \/>\n935 &#8211; 813<\/p>\n<p>Estimate: <span style=\"text-decoration: underline;\">100<br \/>\n<\/span>Difference: <span style=\"text-decoration: underline;\">122<\/span><\/p>\n<p>935<br \/>\n<span style=\"text-decoration: underline;\">813<\/span><br \/>\n122<br \/>\nThe number closer to 122 is 100.<br \/>\nThe difference is 122.<\/p>\n<p>Question 8<br \/>\n358 &#8211; 292<\/p>\n<p>Estimate: <span style=\"text-decoration: underline;\">50<\/span><br \/>\nDifference: <span style=\"text-decoration: underline;\">66<\/span><\/p>\n<p>358<br \/>\n<span style=\"text-decoration: underline;\">292<\/span><br \/>\n66<br \/>\nThe number closer to 66 is 50.<br \/>\nThe difference is 66.<\/p>\n<p>Question 9<br \/>\n826 &#8211; 617<\/p>\n<p>Estimate: <span style=\"text-decoration: underline;\">200<\/span><br \/>\nDifference: <span style=\"text-decoration: underline;\">209<\/span><\/p>\n<p>826<br \/>\n<span style=\"text-decoration: underline;\">617<\/span><br \/>\n209<br \/>\nThe number closer to 209 is 200.<br \/>\nThe difference is 209.<\/p>\n<p>Question 10<br \/>\n900 &#8211; 158<\/p>\n<p>Estimate: <span style=\"text-decoration: underline;\">750<br \/>\n<\/span>Difference: <span style=\"text-decoration: underline;\">742<\/span><\/p>\n<p>900<br \/>\n<span style=\"text-decoration: underline;\">158<\/span><br \/>\n742<br \/>\nThe number closer to 742 is 750.<br \/>\nThe difference is 742<\/p>\n<p>Question 11<br \/>\n607 &#8211; 568<\/p>\n<p>Estimate: <span style=\"text-decoration: underline;\">40<br \/>\n<\/span>Difference: <span style=\"text-decoration: underline;\">39<\/span><\/p>\n<p>607<br \/>\n<span style=\"text-decoration: underline;\">568<\/span><br \/>\n39<br \/>\nThe number closer to 39 is 40.<br \/>\nThe difference is 40.<\/p>\n<p>Question 12<br \/>\n973 &#8211; 869<\/p>\n<p>Estimate: <span style=\"text-decoration: underline;\">100<\/span><\/p>\n<p>Difference: <span style=\"text-decoration: underline;\">104<\/span><\/p>\n<p>973<br \/>\n<span style=\"text-decoration: underline;\">869<\/span><br \/>\n104<br \/>\nThe number closer to 104 is 100.<br \/>\nThe difference is 104.<\/p>\n<p>Problem Solving<br \/>\nQuestion 13<br \/>\nBev scored 540 points. This was 158 points more than Ike scored. How many points did Ike score?<\/p>\n<p><span style=\"text-decoration: underline;\"> \u00a0 \u00a0 \u00a0<\/span> points<\/p>\n<p>Answer: 382 points<\/p>\n<p>Explanation:<\/p>\n<p>Bev scored 540 points. This was 158 points more than Ike scored.<br \/>\nLet the number of points Ike scored = x<br \/>\nx + 158 = 540<br \/>\nx = 540 &#8211; 158<br \/>\nx = 382<br \/>\nTherefore the points that Ike scored is 382.<\/p>\n<p>Question 14<br \/>\nA youth group earned $285 washing cars. The group\u2019s expenses were $79. How much profit did the group make washing cars?<\/p>\n<p>$ <span style=\"text-decoration: underline;\"> \u00a0 \u00a0 \u00a0<\/span> profit<\/p>\n<p>Answer: $206<\/p>\n<p>Explanation:<\/p>\n<p>A youth group earned $285 washing cars.<br \/>\nThe group\u2019s expenses were $79.<br \/>\nTo find how much profit did the group make washing cars.<br \/>\nSubtract 79 from 285<br \/>\n285 &#8211; 79<br \/>\n285<br \/>\n<span style=\"text-decoration: underline;\">-79<\/span><br \/>\n206<br \/>\nThe group makes $206 profit by washing cars.<\/p>\n<h3><a id=\"Combine_Place_Values_to_Subtract_Lesson_Check_Page No_72\"><\/a>Lesson 11: Combine Place Values to Subtract Page No 72<\/h3>\n<p>Question 1<br \/>\nA television program lasts for 120 minutes. Of that time, 36 minutes are taken up by commercials. What is the length of the actual program without the commercials?<\/p>\n<p>(a) 84 minutes<br \/>\n(b) 94 minutes<br \/>\n(c) 104 minutes<br \/>\n(d) 156 minutes<\/p>\n<p>Answer: 84 minutes<\/p>\n<p>Explanation:<\/p>\n<p>A television program lasts for 120 minutes.<br \/>\nOf that time, 36 minutes are taken up by commercials.<br \/>\nTo find the length of the actual program without the commercials<br \/>\nSubtract 36 minutes from 120 minutes<br \/>\n120<br \/>\n<span style=\"text-decoration: underline;\">-36<\/span><br \/>\n84<br \/>\nThus the length of the actual program without the commercials is 84 minutes.<br \/>\nThe correct answer is option A.<\/p>\n<p>Question 2<br \/>\nSyd spent 215 minutes at the library. Of that time, he spent 120 minutes on the computer. How much of his time at the library did Sid NOT spend on the computer?<\/p>\n<p>(a) 85 minutes<br \/>\n(b) 95 minutes<br \/>\n(c) 105 minutes<br \/>\n(d) 335 minutes<\/p>\n<p>Answer: 95 minutes<\/p>\n<p>Explanation:<\/p>\n<p>Syd spent 215 minutes at the library.<br \/>\nOf that time, he spent 120 minutes on the computer.<br \/>\nTo find How much of his time at the library did Sid NOT spend on the computer<br \/>\nWe have to subtract the time he spent on the computer from the total time he spent at the library.<br \/>\ni.e., 215 &#8211; 120 = 95 minutes<br \/>\nSo, the correct answer is option B.<\/p>\n<p>Spiral Review<br \/>\nQuestion 3<br \/>\nXavier\u2019s older brother has 568 songs on his music player. To the nearest hundred, about how many songs are on the music player?<\/p>\n<p>(a) 500<br \/>\n(b) 600<br \/>\n(c) 700<br \/>\n(d) 800<\/p>\n<p>Answer: 600<\/p>\n<p>Explanation:<\/p>\n<p>Xavier\u2019s older brother has 568 songs on his music player.<br \/>\n568 to the nearest hundred is 600.<br \/>\nThus the correct answer is option B.<\/p>\n<p>Question 4<br \/>\nThe students traveled to the zoo in 3 buses. One bus had 47 students. The second bus had 38 students. The third bus had 43 students. How many students in all were on the three buses?<\/p>\n<p>(a) 108<br \/>\n(b) 118<br \/>\n(c) 128<br \/>\n(d) 138<\/p>\n<p>Answer: 128<\/p>\n<p>Explanation:<\/p>\n<p>The students traveled to the zoo in 3 buses.<br \/>\nOne bus had 47 students.<br \/>\nThe second bus had 38 students.<br \/>\nThe third bus had 43 students.<br \/>\nTotal number of students in all three buses = x<br \/>\nx = 47 + 38 + 43<br \/>\nx = 128 students.<br \/>\nSo, the correct answer is option C.<\/p>\n<p>Question 5<br \/>\nCallie has 83 postcards in her collection. Of the postcards, 24 are from Canada. The rest of the postcards are from the United States. How many of the postcards are from the United States?<\/p>\n<p>(a) 58<br \/>\n(b) 59<br \/>\n(c) 61<br \/>\n(d) 69<\/p>\n<p>Answer: 59<\/p>\n<p>Explanation:<\/p>\n<p>Callie has 83 postcards in her collection.<br \/>\nOf the postcards, 24 are from Canada.<br \/>\nThe rest of the postcards are from the United States.<br \/>\nSubtract 24 from 83 we get the number of postcards is from the United States.<br \/>\n83 &#8211; 24 = 59<br \/>\nSo, the correct answer is option B.<\/p>\n<p>Question 6<br \/>\nThere were 475 seats set up for the school play. At one performance, 189 of the seats were empty. How many seats were filled at that performance?<\/p>\n<p>(a) 286<br \/>\n(b) 296<br \/>\n(c) 314<br \/>\n(d) 396<\/p>\n<p>Answer: 286<\/p>\n<p>Explanation:<\/p>\n<p>There were 475 seats set up for the school play.<br \/>\nAt one performance, 189 of the seats were empty.<br \/>\nLet the Number of seats were filled at that performance = x<br \/>\nx + 189 = 475<br \/>\nx = 475 &#8211; 189<br \/>\nx = 286<br \/>\nThus the correct answer is option A.<\/p>\n<h3><a id=\"Problem_Solving_Model_Addition_and_Subtraction_Page No_77\"><\/a>Problem Solving \u2022 Model Addition and Subtraction Page No &#8211; 77<\/h3>\n<p>Use the bar model to solve the problem.<\/p>\n<p>Question 1<br \/>\nElena went bowling. Elena\u2019s score in the first game was 127. She scored 16 more points in the second game than in the first game. What was her total score?<\/p>\n<p><img loading=\"lazy\" class=\"alignnone size-full wp-image-297\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2020\/06\/Go-Math-Grade-3-Chapter-1-Model-Addition-and-Substraction-Problem-Solving-Question-1.jpg\" alt=\"Go Math Grade 3 Chapter 1 Model Addition and Substraction Problem Solving Question 1\" width=\"679\" height=\"282\" srcset=\"https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2020\/06\/Go-Math-Grade-3-Chapter-1-Model-Addition-and-Substraction-Problem-Solving-Question-1.jpg 679w, https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2020\/06\/Go-Math-Grade-3-Chapter-1-Model-Addition-and-Substraction-Problem-Solving-Question-1-300x125.jpg 300w\" sizes=\"(max-width: 679px) 100vw, 679px\" \/><\/p>\n<p>Question 2<br \/>\nMike\u2019s Music sold 287 CDs on the first day of a 2-day sale. The store sold 96 more CDs on the second day than on the first day. How many CDs in all were sold during the 2-day sale?<\/p>\n<p><img loading=\"lazy\" class=\"alignnone size-full wp-image-296\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2020\/06\/Go-Math-Grade-3-Chapter-1-Model-Addition-and-Substraction-Problem-Solving-Question-2.jpg\" alt=\"Go Math Grade 3 Chapter 1 Model Addition and Substraction Problem Solving Question 2\" width=\"680\" height=\"146\" srcset=\"https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2020\/06\/Go-Math-Grade-3-Chapter-1-Model-Addition-and-Substraction-Problem-Solving-Question-2.jpg 680w, https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2020\/06\/Go-Math-Grade-3-Chapter-1-Model-Addition-and-Substraction-Problem-Solving-Question-2-300x64.jpg 300w\" sizes=\"(max-width: 680px) 100vw, 680px\" \/><\/p>\n<p><span style=\"text-decoration: underline;\">\u00a0 \u00a0 \u00a0<\/span> CDs<\/p>\n<p>Answer: 670 CDs<\/p>\n<p>Explanation:<\/p>\n<p>Mike\u2019s Music sold 287 CDs on the first day of a 2-day sale.<br \/>\nThe store sold 96 more CDs on the second day than on the first day.<br \/>\nThe means Mike&#8217;s music sold CDs on the second day = 287 + 96 = 383.<br \/>\n\u2605 = 283 CDs<br \/>\nTotal CDs were sold during the 2-day sale = 383 + 287<br \/>\n\u2666 = 383 + 287 = 670 CDs<\/p>\n<h3><a id=\"Problem_Solving_Model_Addition_and_Subtraction_Lesson_Check_Page No_78\"><\/a>Lesson Check Page No &#8211; 78<\/h3>\n<p>Question 1<br \/>\nMs. Hinely picked 46 tomatoes from her garden on Friday. On Saturday, she picked 17 tomatoes. How many tomatoes did she pick in all?<\/p>\n<p>(a) 109<br \/>\n(b) 63<br \/>\n(c) 53<br \/>\n(d) 29<\/p>\n<p>Answer: 63<\/p>\n<p>Explanation:<\/p>\n<p>Ms. Hinely picked 46 tomatoes from her garden on Friday.<br \/>\nOn Saturday, she picked 17 tomatoes.<br \/>\nFirst, find how many tomatoes did she pick in all.<br \/>\n46 + 17 = \u2605<br \/>\n\u2605 = 63<br \/>\nSo, the correct answer is option B.<\/p>\n<p>Question 2<br \/>\nRosa read 57 pages of a book in the morning. She read 13 fewer pages in the afternoon. How many pages did Rosa read in the afternoon?<\/p>\n<p>(a) 44<br \/>\n(b) 60<br \/>\n(c) 70<br \/>\n(d) 83<\/p>\n<p>Answer: 44<\/p>\n<p>Explanation:<\/p>\n<p>Rosa read 57 pages of a book in the morning.<br \/>\nShe read 13 fewer pages in the afternoon.<br \/>\n57 &#8211; 13 = \u2666<br \/>\n\u2666 = 57 &#8211; 13<br \/>\n\u2666 = 44<br \/>\nThus the correct answer is option A.<\/p>\n<p>Spiral Review<br \/>\nQuestion 3<br \/>\nMike has 57 action figures. Alex has 186 action figures. Which is the best estimate of the number of action figures Mike and Alex have altogether?<\/p>\n<p>(a) 150<br \/>\n(b) 250<br \/>\n(c) 350<br \/>\n(d) 400<\/p>\n<p>Answer: 250<\/p>\n<p>Explanation:<\/p>\n<p>Mike has 57 action figures.<br \/>\nAlex has 186 action figures.<br \/>\n186 &#8211; 57 = \u2605<br \/>\n\u2605 = 186 &#8211; 57<br \/>\n\u2605 = 129<br \/>\nNow Add Mike and Alex action figures<br \/>\n\u2666 = 186 + 57 = 243<br \/>\nThe estimated figure of 243 is 250.<br \/>\nThus the correct answer is option B.<\/p>\n<p>Question 4<br \/>\nThere are 500 sheets of paper in the pack Hannah bought. She has used 137 sheets already. How many sheets of paper does Hannah have left?<\/p>\n<p>(a) 363<br \/>\n(b) 463<br \/>\n(c) 400<br \/>\n(d) 637<\/p>\n<p>Answer: 363<\/p>\n<p>Explanation:<\/p>\n<p>There are 500 sheets of paper in the pack Hannah bought. She has used 137 sheets already.<br \/>\nTo find how many sheets of paper does Hannah have left<br \/>\nWe have to subtract the number of sheets used from the total number of sheets.<br \/>\n500 &#8211; 137 = \u2605<br \/>\n\u2605 = 500 &#8211; 137<br \/>\n\u2605 = 363<br \/>\nTherefore 343 sheets are left.<br \/>\nThe correct answer is option A.<\/p>\n<p>Question 5<br \/>\nThere were 378 visitors to the science museum on Friday. There were 409 visitors on Saturday. How many more people visited the museum on Saturday?<\/p>\n<p>(a) 25<br \/>\n(b) 31<br \/>\n(c) 171<br \/>\n(d) 787<\/p>\n<p>Answer: 31<\/p>\n<p>Explanation:<\/p>\n<p>There were 378 visitors to the science museum on Friday.<br \/>\nThere were 409 visitors on Saturday.<br \/>\nTo find how many more people visited the museum on Saturday.<br \/>\nSubtract the number of visitors on Friday from the number of visitors on Saturday.<br \/>\n409 &#8211; 378 = 31<br \/>\n31 people visited more\u00a0the museum on Saturday.<br \/>\nSo the correct answer is option B.<\/p>\n<p>Question 6<br \/>\nRavi scores 247 points in a video game. How many more points does he need to score a total of 650?<\/p>\n<p>(a) 897<br \/>\n(b) 430<br \/>\n(c) 417<br \/>\n(d) 403<\/p>\n<p>Answer: 403<\/p>\n<p>Explanation:<\/p>\n<p>Ravi scores 247 points in a video game.<br \/>\nLet x be the points he needs to score a total of 650<br \/>\nx + 247 = 650<br \/>\nx = 650 &#8211; 247<br \/>\nx = 403<br \/>\nThus he needs 403 points to make a score of 650.<br \/>\nThe correct answer is option D.<\/p>\n<h3><a id=\"Review_Test_Page No_79\"><\/a>Review\/Test &#8211; Page No 79<\/h3>\n<p>Question 1<\/p>\n<p>For numbers 1a\u20131d, choose Yes or No to tell whether the sum is even.<\/p>\n<p>a. 5 + 8<\/p>\n<p>(a) yes<br \/>\n(b) no<\/p>\n<p>Answer: No<\/p>\n<p>Explanation:<\/p>\n<p>5 + 8 = 13 is an odd number.<br \/>\nSo, the answer is no.<\/p>\n<p>Question 1<br \/>\nb. 9 + 3<\/p>\n<p>(a) yes<br \/>\n(b) no<\/p>\n<p>Answer: Yes<\/p>\n<p>Explanation:<\/p>\n<p>9 + 3 = 12 is an even number.<br \/>\nSo, the answer is yes.<\/p>\n<p>Question 1<br \/>\nc. 6 + 7<\/p>\n<p>(a) yes<br \/>\n(b) no<\/p>\n<p>Answer: No<\/p>\n<p>Explanation:<\/p>\n<p>6 + 7 = 13 is an odd number.<br \/>\nSo, the answer is no.<\/p>\n<p>Question 1<br \/>\nd. 9 + 5<\/p>\n<p>(a) yes<br \/>\n(b) no<\/p>\n<p>Answer: Yes<\/p>\n<p>Explanation:<\/p>\n<p>9 + 5 = 14 is an even number.<br \/>\nSo, the answer is yes.<\/p>\n<p>Question 2<br \/>\nSelect the number sentences that show the Commutative Property of Addition. Mark all that apply.<\/p>\n<p>(a) 14 + 8 = 22<br \/>\n(b) 8 + 14 = 14 + 8<br \/>\n(c) 8 + (13 + 1) = (8 + 13) + 1<br \/>\n(d) (5 + 9) + 8 = (9 + 5) + 8<\/p>\n<p>Answer: 8 + 14 = 14 + 8<\/p>\n<p>Explanation:<\/p>\n<p>According to the commutative property of addition, changing the order of the numbers we are adding, does not change the sum.<br \/>\nSo, the answer is option B.<\/p>\n<p>Question 3<br \/>\nSelect the numbers that round to 300 when rounded to the nearest hundred. Mark all that apply.<\/p>\n<p>(a) 238<br \/>\n(b) 250<br \/>\n(c) 283<br \/>\n(d) 342<br \/>\n(e) 359<\/p>\n<p>Answer: 283<\/p>\n<p>Explanation:<br \/>\n283 rounded to the nearest hundred is 300.<br \/>\nSo, the correct answer is option C.<\/p>\n<p>Question 4<br \/>\nThere are 486 books in the classroom library. Complete the chart to show 486 rounded to the nearest 10.<\/p>\n<p><img loading=\"lazy\" class=\"alignnone size-full wp-image-298\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2020\/06\/Go-Math-Grade-3-Chapter-1-Model-Addition-and-Substraction-Problem-Solving-Question-4.jpg\" alt=\"Go Math Grade 3 Chapter 1 Model Addition and Substraction Problem Solving Question 4\" width=\"300\" height=\"75\" \/><\/p>\n<p>Answer:<\/p>\n<table style=\"height: 51px;\" border=\"2\" width=\"701\">\n<tbody>\n<tr>\n<td width=\"66\"><strong>Hundreds<\/strong><\/td>\n<td width=\"66\"><strong>Tens<\/strong><\/td>\n<td width=\"66\"><strong>Ones<\/strong><\/td>\n<\/tr>\n<tr>\n<td width=\"66\">400<\/td>\n<td width=\"66\">90<\/td>\n<td width=\"66\">0<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p>486 rounded to the nearest ten is 490.<\/p>\n<h3><a id=\"Review_Test_Page No_80\"><\/a>Review\/Test &#8211; Page No &#8211; 80<\/h3>\n<p>Question 5<br \/>\nWrite each number sentence in the box below the better estimate of the sum.<\/p>\n<p>393+225=\u25a0 481+215=\u25a0<\/p>\n<p>352+328=\u25a0 309+335=\u25a0<\/p>\n<p><img loading=\"lazy\" class=\"alignnone size-full wp-image-299\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2020\/06\/Write-each-number-sentence-in-the-box-below-the-better-estimate-of-the-sum.jpg\" alt=\"Write each number sentence in the box below the better estimate of the sum\" width=\"329\" height=\"112\" srcset=\"https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2020\/06\/Write-each-number-sentence-in-the-box-below-the-better-estimate-of-the-sum.jpg 329w, https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2020\/06\/Write-each-number-sentence-in-the-box-below-the-better-estimate-of-the-sum-300x102.jpg 300w\" sizes=\"(max-width: 329px) 100vw, 329px\" \/><\/p>\n<p>Answer:<\/p>\n<table style=\"height: 51px;\" border=\"2\" width=\"701\">\n<tbody>\n<tr>\n<td width=\"66\"><strong>600<\/strong><\/td>\n<td width=\"66\"><strong>700<\/strong><\/td>\n<\/tr>\n<tr>\n<td width=\"66\">393+225 = 618<br \/>\nThe estimated sum is 600.309+335= 644<br \/>\nThe estimated sum is 600.<\/td>\n<td width=\"66\">481+215= 696<br \/>\nThe estimated sum is 700.352+328= 680<br \/>\nThe estimated sum is 700.<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p>Explanation:<\/p>\n<p>393+225=\u25a0<br \/>\n\u25a0 = 618<br \/>\nThe number closer to 618 is 600<\/p>\n<p>481+215=\u25a0<br \/>\n\u25a0 = 696<br \/>\nThe number closer to 696 is 700<\/p>\n<p>352+328=\u25a0<br \/>\n\u25a0 = 680<br \/>\nThe number closer to 680 is 700.<\/p>\n<p>309+335=\u25a0<br \/>\n\u25a0 = 644<br \/>\nThe number closer to 644 is 600.<\/p>\n<p>Question 6<br \/>\nDiana sold 336 muffins at the bake sale. Bob sold 287 muffins. Bob estimates that he sold 50 fewer muffins than Diana. How did he estimate? Explain.<\/p>\n<p>Answer:<\/p>\n<p>Diana sold 336 muffins at the bake sale.<br \/>\nBob sold 287 muffins.<br \/>\nBob estimates that he sold 50 fewer muffins than Diana.<br \/>\nTo know whether his estimation is right or wrong we have to subtract muffins that Bob sold from muffins that Diana sold<br \/>\n336 &#8211; 287 = 49<br \/>\nThe number closer to 49 is 50.<br \/>\nSo, Bob&#8217;s estimation is correct.<\/p>\n<p>Question 7<br \/>\nThe table shows how many books each class read.<\/p>\n<p><img loading=\"lazy\" class=\"alignnone size-full wp-image-300\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2020\/06\/Go-Math-Grade-3-The-table-shows-how-many-books-each-class-read.jpg\" alt=\"Go Math Grade 3 The table shows how many books each class read\" width=\"230\" height=\"138\" \/><\/p>\n<p>For numbers 7a\u20137d, select True or False for each statement.<\/p>\n<p>a. Ms. Martin\u2019s class read about 100 more books than Mr. Lopez\u2019s class.<\/p>\n<p>(i) True<br \/>\n(ii) False<\/p>\n<p>Answer: True<\/p>\n<p>Explanation:<\/p>\n<p>Number of books that Mr. Lopez\u2019s class read = 273<br \/>\nNumber of books that Ms. Martin\u2019s class read = 402<br \/>\n402<br \/>\n<span style=\"text-decoration: underline;\">&#8211; 273<\/span><br \/>\n129<br \/>\nSo, the statement Ms. Martin\u2019s class read about 100 more books than Mr. Lopez\u2019s class is true.<\/p>\n<p>Question 7<br \/>\nb. The 3 classes read over 900 books altogether.<\/p>\n<p>(i) True<br \/>\n(ii) False<\/p>\n<p>Answer: True<\/p>\n<p>Explanation:<\/p>\n<p>Number of books that Mr. Lopez\u2019s class read = 273<br \/>\nNumber of books that Ms. Martin\u2019s class read = 402<br \/>\nNumber of books that Mrs. Wang read = 247<br \/>\n273<br \/>\n402<br \/>\n<span style=\"text-decoration: underline;\">274<\/span><br \/>\n949<br \/>\nTherefore the statement the 3 classes read over 900 books altogether is true.<\/p>\n<p>Question 7<br \/>\nc. Mrs. Wang\u2019s class read about 50 fewer books than Mr. Lopez\u2019s class.<\/p>\n<p>(i) True<br \/>\n(ii) False<\/p>\n<p>Answer: False<\/p>\n<p>Explanation:<\/p>\n<p>Number of books that Mrs. Wang read = 247<br \/>\nNumber of books that Mr. Lopez\u2019s class read = 273<br \/>\n273<br \/>\n<span style=\"text-decoration: underline;\">&#8211; 247<\/span><br \/>\n26<br \/>\nThus the statement Mrs. Wang\u2019s class read about 50 fewer books than Mr. Lopez\u2019s class is false.<\/p>\n<p>Question 7<br \/>\nd. Ms. Martin\u2019s and Mrs. Wang\u2019s class read about 700 books.<\/p>\n<p>(i) True<br \/>\n(ii) False<\/p>\n<p>Answer: False<\/p>\n<p>Explanation:<\/p>\n<p>Number of books that Ms. Martin\u2019s class read = 402<br \/>\nNumber of books that Mrs. Wang read = 247<br \/>\n402<br \/>\n<span style=\"text-decoration: underline;\">247<\/span><br \/>\n649<br \/>\nTherefore the statement Ms. Martin\u2019s and Mrs. Wang\u2019s class read about 700 books is false.<\/p>\n<h3><a id=\"Review_Test_Page No_81\"><\/a>Review\/Test &#8211; Page No &#8211; 81<\/h3>\n<p>Question 8<br \/>\nJanna buys 2 bags of dog food for her dogs. One bag weighs 37 pounds. The other bag weighs 15 pounds. How many pounds do both bags weigh? Explain how you solved the problem.<\/p>\n<p><span style=\"text-decoration: underline;\">\u00a0 \u00a0 \u00a0<\/span> pounds<\/p>\n<p>Answer: 52 pounds<\/p>\n<p>Explanation:<\/p>\n<p>Janna buys 2 bags of dog food for her dogs. One bag weighs 37 pounds. The other bag weighs 15 pounds.<br \/>\nI used friendly numbers<\/p>\n<p>37 = 35 + 2<br \/>\n<span style=\"text-decoration: underline;\">15<\/span> = <span style=\"text-decoration: underline;\">15 + 0<\/span><br \/>\n52 =\u00a0 50 + 2<br \/>\nThe weight of 2 bags is 52 pounds.<\/p>\n<p>Question 9<br \/>\nChoose the property that makes the statement true.<\/p>\n<p>The <img loading=\"lazy\" class=\"alignnone size-full wp-image-3973\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2020\/06\/Go-Math-grade-3-Chapter-1-answer-key-review-image_1.jpg\" alt=\"Go Math grade 3 Chapter 1 answer key review image_1\" width=\"144\" height=\"126\" \/> Property of addition states that you can group addends in different ways and get the same sum.<\/p>\n<p>Answer: The Associative Property of addition states that you can group addends in different ways and get the same sum.<\/p>\n<p>Use the table for 10\u201312.<\/p>\n<p><img loading=\"lazy\" class=\"alignnone size-full wp-image-301\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2020\/06\/Go-Math-Grade-3-Chapter-1-Problem-Solving-Use-the-table-for-10\u201312.jpg\" alt=\"Go Math Grade 3 Chapter 1 Problem Solving Use the table for 10\u201312\" width=\"282\" height=\"138\" \/><\/p>\n<p>Question 10<br \/>\nThe table shows the number of sweaters sold online in three months. How many sweaters were sold in January and February?<\/p>\n<p><span style=\"text-decoration: underline;\">\u00a0 \u00a0 \u00a0 \u00a0<\/span> sweaters<\/p>\n<p>Answer: 700 sweaters<\/p>\n<p>Explanation:<\/p>\n<p>The number of sweets sold in the month of January = 402<br \/>\nThe number of sweets sold in the month of February = 298<br \/>\nFirst, make the friendly numbers to make the addition easy.|<br \/>\nSubtract 2 from 402 = 402 &#8211; 2 = 400<br \/>\nNext add 2 to 298 = 298 + 2 = 300<br \/>\nNow add both<br \/>\n400 + 300 = 700<br \/>\nTherefore 700 sweaters were sold in January and February.<\/p>\n<p>Question 11<br \/>\nHow many more sweaters were sold in January than March?<\/p>\n<p><span style=\"text-decoration: underline;\">\u00a0 \u00a0 \u00a0 \u00a0<\/span> sweaters<\/p>\n<p>Answer: 231 sweaters<\/p>\n<p>Explanation:<\/p>\n<p>The number of sweets sold in the month of January = 402<br \/>\nThe number of sweets sold in the month of March = 171<br \/>\nTo find how many more sweaters were sold in January than March, we have subtracted the number of sweaters sold in the march from January<br \/>\n402 &#8211; 171 = 231<br \/>\n231 more sweaters were sold in January than March.<\/p>\n<p>Question 12<\/p>\n<p>How many more sweaters were sold in February and March than in January?<\/p>\n<p><span style=\"text-decoration: underline;\">\u00a0 \u00a0 \u00a0 \u00a0<\/span> sweaters<\/p>\n<p>Answer: 67 sweaters<\/p>\n<p>Explanation:<\/p>\n<p>The number of sweets sold in the month of January = 402<br \/>\nThe number of sweets sold in the month of February = 298<br \/>\nThe number of sweets sold in the month of March = 171<br \/>\nTotal number of sweaters sold in February and March = 298 + 171 = 469<br \/>\nNow subtract 402 from 469<br \/>\n469 &#8211; 402 = 67 sweaters<br \/>\n67 more sweaters were sold in February and March than in January.<\/p>\n<h3><a id=\"Review_Test_Page No_82\"><\/a>Review\/Test &#8211; Page No &#8211; 82<\/h3>\n<p>Question 13<br \/>\nHelp Dana find the sum.<\/p>\n<p>346 + 421 + 152<br \/>\nFor numbers 13a\u201313d, select Yes or No to tell Dana when to regroup.<\/p>\n<p>a. Regroup the ones.<\/p>\n<p>(a) yes<br \/>\n(b) no<\/p>\n<p>Answer: Yes<\/p>\n<p>Question 13<br \/>\nb. Add the regrouped ten.<\/p>\n<p>(a) yes<br \/>\n(b) no<\/p>\n<p>Answer: No<\/p>\n<p>Question 13<br \/>\nc. Regroup the tens.<\/p>\n<p>(a) yes<br \/>\n(b) no<\/p>\n<p>Answer: Yes<\/p>\n<p>Question 13<br \/>\nd. Add the regrouped hundred.<\/p>\n<p>(a) yes<br \/>\n(b) no<\/p>\n<p>Answer: Yes<\/p>\n<p>Question 14<br \/>\nAlexandra has 78 emails in her inbox. She deletes 47 emails. How many emails are left in her inbox? Draw jumps and label the number line to show your thinking.<\/p>\n<p><img loading=\"lazy\" class=\"alignnone size-full wp-image-302\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2020\/06\/Go-Math-Grade-3-Chapter-1-Alexandra-has-78-emails-in-her-inbox.-She-deletes-47-emails.jpg\" alt=\"Go Math Grade 3 Chapter 1 Alexandra has 78 emails in her inbox. She deletes 47 emails\" width=\"485\" height=\"52\" srcset=\"https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2020\/06\/Go-Math-Grade-3-Chapter-1-Alexandra-has-78-emails-in-her-inbox.-She-deletes-47-emails.jpg 485w, https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2020\/06\/Go-Math-Grade-3-Chapter-1-Alexandra-has-78-emails-in-her-inbox.-She-deletes-47-emails-300x32.jpg 300w\" sizes=\"(max-width: 485px) 100vw, 485px\" \/><\/p>\n<p><span style=\"text-decoration: underline;\">\u00a0 \u00a0 \u00a0 \u00a0<\/span> emails<\/p>\n<p>Answer: 31 emails<\/p>\n<p>Explanation:<\/p>\n<p>Alexandra has 78 emails in her inbox.<br \/>\nShe deletes 47 emails.<br \/>\nLet x be the number of emails left in her inbox<br \/>\nx + 47 = 78<br \/>\nx = 78 &#8211; 47<br \/>\nx = 31<br \/>\nTherefore, 31 emails are left in her inbox.<\/p>\n<p>Question 15<br \/>\nDaniel has 402 pieces in a building set. He uses 186 pieces to build a house. How many pieces does he have left? Show your work.<\/p>\n<p><span style=\"text-decoration: underline;\">\u00a0 \u00a0 \u00a0 \u00a0<\/span> pieces<\/p>\n<p>Answer: 216 pieces<\/p>\n<p>Explanation:<\/p>\n<p>Daniel has 402 pieces in a building set.<br \/>\nHe uses 186 pieces to build a house.<br \/>\nx be the number of pieces he had left<br \/>\nx + 186 = 402<br \/>\nx = 402 &#8211; 186<br \/>\nx = 216 pieces<br \/>\nThus he left 216 pieces to build a house<\/p>\n<h3><a id=\"Review_Test_Page No_83\"><\/a>Review\/Test &#8211; Page No &#8211; 83<\/h3>\n<p>Question 16<br \/>\nLuke solves this problem. He says the difference is 214. Explain the mistake Luke made. What is the correct difference?<\/p>\n<p>352\u2212148 = <span style=\"text-decoration: underline;\">\u00a0 \u00a0 \u00a0 \u00a0<\/span><\/p>\n<p>Answer: 204<\/p>\n<p>Explanation:<\/p>\n<p>Make friendly numbers to make the subtraction easy.<br \/>\nFirst subtract 2 from 352 = 350<br \/>\n350<br \/>\n<span style=\"text-decoration: underline;\">148<\/span><br \/>\n202<br \/>\n1 will be borrowed from tens place. So 0 becomes 10.<br \/>\n10 &#8211; 8 = 2<br \/>\n4 &#8211; 4 = 0<br \/>\n300 &#8211; 100 = 200<br \/>\n200 + 2 = 202<br \/>\nNow add 2 to 202 you get 204.<\/p>\n<p>Question 17<br \/>\nSunnyday Elementary School is having its annual Read-a-thon. The third graders have read 573 books so far. Their goal is to read more than 900 books. What is the least number of books they need to read to reach their goal? Explain.<\/p>\n<p><span style=\"text-decoration: underline;\">\u00a0 \u00a0 \u00a0 \u00a0<\/span> books<\/p>\n<p>Answer: 327 books<\/p>\n<p>Explanation:<\/p>\n<p>Sunnyday Elementary School is having its annual Read-a-thon.<br \/>\nThe third graders have read 573 books so far. Their goal is to read more than 900 books.<br \/>\nLet the 3rd graders have to read the total number of books = x<br \/>\nx + 573 = 900<br \/>\nx = 900 &#8211; 573<br \/>\nx = 327<br \/>\nThus the least number of books they need to read to reach their goal is 327 books.<\/p>\n<p>Question 18<br \/>\nThere are 318 fiction books in the class library. The number of nonfiction books is 47 less than the number of fiction books.<\/p>\n<p>Part A<\/p>\n<p>About how many nonfiction books are there in the class library? Explain.<\/p>\n<p>About <span style=\"text-decoration: underline;\">\u00a0 \u00a0 \u00a0 \u00a0<\/span> nonfiction books<\/p>\n<p>Answer: About 270 nonfiction books<\/p>\n<p>Explanation:<\/p>\n<p>Given that,<br \/>\nThere are 318 fiction books in the class library.<br \/>\nThe number of nonfiction books is 47 less than the number of fiction books.<br \/>\nNumber of non fictions books = x<br \/>\nx + 47 = 318<br \/>\nx = 318 &#8211; 47<br \/>\nx = 271<br \/>\nThe number closer to 271 is 270.<br \/>\nSo, there are about 270 nonfiction books.<\/p>\n<p>Question 18<br \/>\nPart B<\/p>\n<p>How many fiction and nonfiction books are there in the class library altogether? Show your work.<\/p>\n<p><span style=\"text-decoration: underline;\">\u00a0 \u00a0 \u00a0 \u00a0<\/span> total books<\/p>\n<p>Answer: 589<\/p>\n<p>Explanation:<\/p>\n<p>Number of fiction books = 318<br \/>\nNumber of nonfiction books = 271<br \/>\nTo find the total number of books we need to add both fiction and nonfiction books<br \/>\n= 318 + 271 = 589<br \/>\nThere are 589 books in the class library.<\/p>\n<h3><a id=\"Review_Test_Page No_84\"><\/a>Review\/Test &#8211; Page No &#8211; 84<\/h3>\n<p>Question 19<br \/>\nAlia used 67 + 38 = 105 to check her subtraction. Which math problem could she be checking? Mark all that apply.<\/p>\n<p>67\u221238=\u25a0<br \/>\n105\u221267=\u25a0<br \/>\n105+38=\u25a0<br \/>\n105\u221238=\u25a0<\/p>\n<p>Answer: 105\u221267= 38; 105\u221238=67<br \/>\nShe can use option B and Option D to check her subtraction.<\/p>\n<p>Question 20<br \/>\nAlex and Erika collect shells. The tables show the kinds of shells they collected.<\/p>\n<p><img loading=\"lazy\" class=\"alignnone size-full wp-image-305\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2020\/06\/Go-Math-Grade-3-Chapter-1-Problem-Solving-Alex-and-Erika-collect-shells.-The-tables-show-the-kinds-of-shells-they-collected..jpg\" alt=\"Go Math Grade 3 Chapter 1 Problem Solving Alex and Erika collect shells. The tables show the kinds of shells they collected.\" width=\"459\" height=\"135\" srcset=\"https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2020\/06\/Go-Math-Grade-3-Chapter-1-Problem-Solving-Alex-and-Erika-collect-shells.-The-tables-show-the-kinds-of-shells-they-collected..jpg 459w, https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2020\/06\/Go-Math-Grade-3-Chapter-1-Problem-Solving-Alex-and-Erika-collect-shells.-The-tables-show-the-kinds-of-shells-they-collected.-300x88.jpg 300w\" sizes=\"(max-width: 459px) 100vw, 459px\" \/><\/p>\n<p>Part A<\/p>\n<p>Who collected more shells? How many did she collect? About how many more is that? Explain how you solved the problem.<\/p>\n<p><span style=\"text-decoration: underline;\">\u00a0 \u00a0 \u00a0 \u00a0<\/span><\/p>\n<p>Answer: Alex<\/p>\n<p>Alxe&#8217;s Shells:<br \/>\nNumber of Scallop = 36<br \/>\nNumber of Jingle shells = 95<br \/>\nNumber of Clam = 115<br \/>\nNow add all the three shells = 36 + 95 + 115 = 246 shells<\/p>\n<p>Erika&#8217;s shells:<\/p>\n<p>Number of Scallop = 82<br \/>\nNumber of Whelk shells = 28<br \/>\nNumber of Clam = 108<br \/>\nNow add all the three shells = 82 + 28 + 108 = 218 shells<br \/>\nAlex collected about 250 shells.<\/p>\n<p>Question 20<br \/>\nPart B<\/p>\n<p>Alex and Erika have the greatest number of what kind of shell? How many shells of that kind do they have? Show your work.<\/p>\n<p>Answer: Clam<\/p>\n<p>The greatest number of shells that Alex and Erika collected are Clam.<\/p>\n<p><em>Conclusion<\/em><\/p>\n<p>In addition to the exercise and homework problems we also provide the solutions for the Extra Practice. So, the students are advised to go through the <a href=\"https:\/\/ccssmathanswers.com\/go-math-grade-3-answer-key-chapter-1-addition-and-subtraction-within-1000-extra-practice\/\" target=\"_blank\" rel=\"noopener noreferrer\">Go Math Answer Key Grade 3 Chapter 1 Addition and Subtraction within 1,000 Extra Practice<\/a> to test your math skills in this chapter. You can also your friends to improve their math skills by sharing this link.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Become a master in maths taking the help of Go Math Grade 3 Answer Key Chapter 1 Addition and Subtraction within 1000. Begin your preparation and learn all the fundamental topics in it. Solve all the Problems in Chapter 1 easily from here and understand the concept behind them. Download Go Math Grade 3 Answer &#8230; <a title=\"Go Math Grade 3 Answer Key Chapter 1 Addition and Subtraction within 1,000\" class=\"read-more\" href=\"https:\/\/bigideasmathanswers.com\/go-math-grade-3-answer-key-chapter-1-addition-and-subtraction-within-1000\/\" aria-label=\"More on Go Math Grade 3 Answer Key Chapter 1 Addition and Subtraction within 1,000\">Read more<\/a><\/p>\n","protected":false},"author":2,"featured_media":8945,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"spay_email":""},"categories":[2],"tags":[],"jetpack_featured_media_url":"https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2020\/09\/go-math-grade-3-chapter-1-addition-and-subtraction-within-1-000-answer-key.jpeg","_links":{"self":[{"href":"https:\/\/bigideasmathanswers.com\/wp-json\/wp\/v2\/posts\/53"}],"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\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/bigideasmathanswers.com\/wp-json\/wp\/v2\/comments?post=53"}],"version-history":[{"count":1,"href":"https:\/\/bigideasmathanswers.com\/wp-json\/wp\/v2\/posts\/53\/revisions"}],"predecessor-version":[{"id":92843,"href":"https:\/\/bigideasmathanswers.com\/wp-json\/wp\/v2\/posts\/53\/revisions\/92843"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/bigideasmathanswers.com\/wp-json\/wp\/v2\/media\/8945"}],"wp:attachment":[{"href":"https:\/\/bigideasmathanswers.com\/wp-json\/wp\/v2\/media?parent=53"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/bigideasmathanswers.com\/wp-json\/wp\/v2\/categories?post=53"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/bigideasmathanswers.com\/wp-json\/wp\/v2\/tags?post=53"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}