{"id":2660,"date":"2022-03-28T16:45:38","date_gmt":"2022-03-28T11:15:38","guid":{"rendered":"https:\/\/ccssmathanswers.com\/?p=2660"},"modified":"2022-04-07T14:25:05","modified_gmt":"2022-04-07T08:55:05","slug":"go-math-grade-4-answer-key-homework-practice-fl-chapter-3-multiply-2-digit-numbers","status":"publish","type":"post","link":"https:\/\/bigideasmathanswers.com\/go-math-grade-4-answer-key-homework-practice-fl-chapter-3-multiply-2-digit-numbers\/","title":{"rendered":"Go Math Grade 4 Answer Key Homework Practice FL Chapter 3 Multiply 2-Digit Numbers"},"content":{"rendered":"<p>Parents are you searching for the best answer key resource to practice all the concepts of multiplication then here it is\u00a0<strong>Go Math Grade 4 Answer Key Homework Practice FL Chapter 3 Multiply 2-Digit Numbers<\/strong>. It aids your kid&#8217;s preparation and makes them grasp all the concepts clearly. One of the best ways to learn the grade 4 Ch 3 Multiply 2-Digit Numbers basics in primary schools is by referring to the <a href=\"https:\/\/ccssmathanswers.com\/go-math-grade-4-answer-key\/\" target=\"_blank\" rel=\"noopener noreferrer\">Go Math Grade 4 Answer Key<\/a>.<\/p>\n<p>However, it also supports students of grade 4 to overcome the difficulties of the basics of maths by presenting the Answer Key for Go Math Grade 4 Homework Practice FL Chapter 3 Multiply 2-Digit Numbers.<\/p>\n<h2>Go Math Grade 4 Answer Key Homework Practice FL Chapter 3 Multiply 2-Digit Numbers<\/h2>\n<p>Remember that Go Math Grade 4 Answer Key Homework Practice FL Chapter 3 Multiply 2-Digit Numbers are available in pdf format here to download easily and access them for free. So, check out the respective topic of <strong>Go Math grade 4 ch 3 Solutions key<\/strong> and learn the techniques by referring to the subject experts&#8217; designed step by steps explanations. Just click on the link and solve complex questions with simple techniques.<\/p>\n<p><strong>Lesson: 1 &#8211; Multiply by Tens<\/strong><\/p>\n<ul>\n<li><a href=\"#Common_Core_Multiply_2_Digit_Numbers_Page_No_51\">Common Core &#8211; Multiply 2-Digit Numbers &#8211; Page No. 51<\/a><\/li>\n<li><a href=\"#Common_Core_Multiply_2_Digit_Numbers_Page_No_52\">Common Core &#8211; Multiply 2-Digit Numbers &#8211; Page No. 52<\/a><\/li>\n<\/ul>\n<p><strong>Lesson: 2 &#8211; Estimate Products<\/strong><\/p>\n<ul>\n<li><a href=\"#Common_Core_Multiply_2_Digit_Numbers_Page_No_53\">Common Core &#8211; Multiply 2-Digit Numbers &#8211; Page No. 53<\/a><\/li>\n<li><a href=\"#Common_Core_Multiply_2_Digit_Numbers_Page_No_54\">Common Core &#8211; Multiply 2-Digit Numbers &#8211; Page No. 54<\/a><\/li>\n<\/ul>\n<p><strong>Lesson: 3 &#8211; Investigate \u2022 Area Models and Partial Products<\/strong><\/p>\n<ul>\n<li><a href=\"#Common_Core_Multiply_2_Digit_Numbers_Page_No_55\">Common Core &#8211; Multiply 2-Digit Numbers &#8211; Page No. 55<\/a><\/li>\n<li><a href=\"#Common_Core_Multiply_2_Digit_Numbers_Page_No_56\">Common Core &#8211; Multiply 2-Digit Numbers &#8211; Page No. 56<\/a><\/li>\n<\/ul>\n<p><strong>Lesson: 4 &#8211; Multiply Using Partial Products<\/strong><\/p>\n<ul>\n<li><a href=\"#Common_Core_Multiply_2_Digit_Numbers_Page_No_57\">Common Core &#8211; Multiply 2-Digit Numbers &#8211; Page No. 57<\/a><\/li>\n<li><a href=\"#Common_Core_Multiply_2_Digit_Numbers_Page_No_58\">Common Core &#8211; Multiply 2-Digit Numbers &#8211; Page No. 58<\/a><\/li>\n<\/ul>\n<p><strong>Lesson: 5 &#8211; Multiply with Regrouping<\/strong><\/p>\n<ul>\n<li><a href=\"#Common_Core_Multiply_2_Digit_Numbers_Page_No_59\">Common Core &#8211; Multiply 2-Digit Numbers &#8211; Page No. 59<\/a><\/li>\n<li><a href=\"#Common_Core_Multiply_2_Digit_Numbers_Page_No_60\">Common Core &#8211; Multiply 2-Digit Numbers &#8211; Page No. 60<\/a><\/li>\n<\/ul>\n<p><strong>Lesson: 6 &#8211; Choose a Multiplication Method<\/strong><\/p>\n<ul>\n<li><a href=\"#Common_Core_Multiply_2_Digit_Numbers_Page_No_61\">Common Core &#8211; Multiply 2-Digit Numbers &#8211; Page No. 61<\/a><\/li>\n<li><a href=\"#Common_Core_Multiply_2_Digit_Numbers_Page_No_62\">Common Core &#8211; Multiply 2-Digit Numbers &#8211; Page No. 62<\/a><\/li>\n<\/ul>\n<p><strong>Lesson: 7 &#8211; Problem Solving \u2022 Multiply 2-Digit Numbers<\/strong><\/p>\n<ul>\n<li><a href=\"#Common_Core_Multiply_2_Digit_Numbers_Page_No_63\">Common Core &#8211; Multiply 2-Digit Numbers &#8211; Page No. 63<\/a><\/li>\n<li><a href=\"#Common_Core_Multiply_2_Digit_Numbers_Page_No_64\">Common Core &#8211; Multiply 2-Digit Numbers &#8211; Page No. 64<\/a><\/li>\n<\/ul>\n<p><strong>Lesson: 8<\/strong><\/p>\n<ul>\n<li><a href=\"#Common_Core_Multiply_2_Digit_Numbers_Page_No_65\">Common Core &#8211; Multiply 2-Digit Numbers &#8211; Page No. 65<\/a><\/li>\n<li><a href=\"#Common_Core_Multiply_2_Digit_Numbers_Page_No_66\">Common Core &#8211; Multiply 2-Digit Numbers &#8211; Page No. 66<\/a><\/li>\n<\/ul>\n<h3><a id=\"Common_Core_Multiply_2_Digit_Numbers_Page_No_51\"><\/a>Common Core &#8211; Multiply 2-Digit Numbers &#8211; Page No. 51<\/h3>\n<p><strong>Multiply by Tens<\/strong><\/p>\n<p><strong>Choose a method. Then find the product.<\/strong><\/p>\n<p>Question 1.<br \/>\n16 \u00d7 60 = <span style=\"text-decoration: underline;\">960<\/span><br \/>\nUse the halving-and-doubling strategy.<br \/>\nFind half of 16: 16 \u00f7 2 = 8.<br \/>\nMultiply this number by 60: 8 \u00d7 60 = 480<br \/>\nDouble this result: 2 \u00d7 480 = 960<\/p>\n<p>Question 2.<br \/>\n80 \u00d7 22 = _____<\/p>\n<p>Answer: 1760<\/p>\n<p>Explanation:<br \/>\nBy using the place value method, Multiply 80 \u00d7 22<br \/>\nYou can think of 80 as 8 tens<br \/>\n80 \u00d7 22 = (22 \u00d7 8) tens<br \/>\n= 176 tens<br \/>\n= 176 \u00d7 10 = 1760<br \/>\n80 \u00d7 22 = 1760<\/p>\n<p>Question 3.<br \/>\n30 \u00d7 52 = _____<\/p>\n<p>Answer: 1560<\/p>\n<p>Explanation:<br \/>\nUse the Associative Property<br \/>\nYou can think of 30 as 3 \u00d7 10<br \/>\n30 \u00d7 52 = (3 \u00d7 10) \u00d7 52<br \/>\n= 3 \u00d7 (10 \u00d7 52)<br \/>\n= 3 \u00d7 520<br \/>\n= 1560<br \/>\n30 \u00d7 52 = 1560<\/p>\n<p>Question 4.<br \/>\n60 \u00d7 20 = _____<\/p>\n<p>Answer: 1200<\/p>\n<p>Explanation:<br \/>\n60 \u00d7 20<br \/>\nUse the halving and doubling strategy<br \/>\nhalf of the 60 to make the problem simpler<br \/>\n60\/ 2 = 30<br \/>\nMultiply 30 with 20<br \/>\n30 \u00d7 20 = 600<br \/>\nDouble the 600<br \/>\n2 \u00d7 600= 1200<br \/>\n60 \u00d7 20 = 1200<\/p>\n<p>Question 5.<br \/>\n40 \u00d7 35 = _____<\/p>\n<p>Answer: 1400<\/p>\n<p>Explanation:<br \/>\nBy using the Associative Property 40 \u00d7 35<br \/>\nYou can think of 40 as 4 \u00d7 10<br \/>\n40 \u00d7 35 = (4 \u00d7 10) \u00d7 35<br \/>\n= 4 \u00d7 (10 \u00d7 35)<br \/>\n= 4 \u00d7 350<br \/>\n= 1400<br \/>\n40 \u00d7 35 = 1400<\/p>\n<p>Question 6.<br \/>\n10 \u00d7 90 = _____<\/p>\n<p>Answer: 900<\/p>\n<p>Explanation:<br \/>\nBy using the place value method, Multiply 10 x 90<br \/>\nYou can think of 90 as 9 tens<br \/>\n10 \u00d7 90 = (10 \u00d7 9) tens<br \/>\n= 90 tens<br \/>\n= 10 \u00d7 90 = 900<\/p>\n<p>Question 7.<br \/>\n31 \u00d7 50 = _____<\/p>\n<p>Answer: 1,550<\/p>\n<p>Explanation:<br \/>\nUse the place value method to multiply 31 \u00d7 50<br \/>\nYou can think of 50 as 5 tens<br \/>\n31 \u00d7 50 = 31 \u00d7 5 tens<br \/>\n= 155 tens<br \/>\n= 1,550<br \/>\n31 \u00d7 50 = 1,550<\/p>\n<p><em><strong>Problem Solving<\/strong><\/em><\/p>\n<p>Question 8.<br \/>\nKenny bought 20 packs of baseball cards. There are 12 cards in each pack. How many cards did Kenny buy?<br \/>\n_____ cards<\/p>\n<p>Answer: 240 cards<\/p>\n<p>Explanation:<br \/>\nFrom the given data,<br \/>\nKenny bought 20 packs of basketball cards<br \/>\nThere are 12 cards in each pack = 12 \u00d7 20 cards<br \/>\nUse the associative property<br \/>\nYou can write 20 as 2 \u00d7 10<br \/>\n12 \u00d7 20 = 12 \u00d7 (2 \u00d7 10)<br \/>\n= (12 \u00d7 2) \u00d7 10<br \/>\n= (24) \u00d7 10<br \/>\n= 240 cards<br \/>\nKenny bought 240 cards<\/p>\n<p>Question 9.<br \/>\nThe Hart family drove 10 hours to their vacation spot. They drove an average of 48 miles each hour. How many miles did they drive in all?<br \/>\n_____ miles<\/p>\n<p>Answer: 480 miles<\/p>\n<p>Explanation:<br \/>\nAs per the given data,<br \/>\nHart family drove 10 hours to their vacation spot<br \/>\nThe average speed per each hour is = 48 miles<br \/>\nTotal miles = 48 \u00d7 10<br \/>\nUse the halving and doubling strategy<br \/>\nHalf of the 48 to make the problem simpler<br \/>\n48\/ 2 = 24<br \/>\nMultiply 24 with 10 = 24 \u00d7 10 = 240<br \/>\nDouble the value = 2 \u00d7 240 = 480 miles<br \/>\nTotal miles drove by hart family = 480 miles.<\/p>\n<h3><a id=\"Common_Core_Multiply_2_Digit_Numbers_Page_No_52\"><\/a>Common Core &#8211; Multiply 2-Digit Numbers &#8211; Page No. 52<\/h3>\n<p><em><strong>Lesson Check<\/strong><\/em><\/p>\n<p>Question 1.<br \/>\nFor the school play, 40 rows of chairs are set up. There are 22 chairs in each row. How many chairs are there in all?<br \/>\nOptions:<br \/>\na. 800<br \/>\nb. 840<br \/>\nc. 880<br \/>\nd. 8,800<\/p>\n<p>Answer: 880<\/p>\n<p>Explanation:<br \/>\nAs per the given data<br \/>\nFor the school play, 40 rows of chairs are available. 22 chairs are available in each row.<br \/>\nThen total chairs in school play are = 22 \u00d7\u00a040<br \/>\nBy using the place value method<br \/>\nYou can think of 40 as 4 tens<br \/>\n22 \u00d7 40 = 22 \u00d7 4 tens<br \/>\n= 88 tens<br \/>\n= 880<br \/>\nTotal chairs in school are = 880<br \/>\nThus the answer is option c.<\/p>\n<p>Question 2.<br \/>\nAt West School, there are 20 classrooms. Each classroom has 20 students. How many students are at West School?<br \/>\nOptions:<br \/>\na. 40<br \/>\nb. 400<br \/>\nc. 440<br \/>\nd. 4,000<\/p>\n<p>Answer: 400<\/p>\n<p>Explanation:<br \/>\nFrom the given data,<br \/>\nTotal classrooms in west school = 20<br \/>\nNumber of students per each classroom = 20<br \/>\nThen, total students at West School = 20 \u00d7 20<br \/>\nBy using the associative property<br \/>\nYou can think of 20 as 2 \u00d7 10<br \/>\n20 \u00d7 20 = 20 \u00d7 (2 \u00d7 10)<br \/>\n= (20 \u00d7 2) \u00d7 10<br \/>\n=(40) \u00d7 10<br \/>\n=400<br \/>\nTotal number of students at West School = 400<br \/>\nThus the answer is option b.<\/p>\n<p><em><strong>Spiral Review<\/strong><\/em><\/p>\n<p>Question 3.<br \/>\nAlex has 48 stickers. This is 6 times the number of stickers Max has. How many stickers does Max have?<br \/>\nOptions:<br \/>\na. 6<br \/>\nb. 7<br \/>\nc. 8<br \/>\nd. 9<\/p>\n<p>Answer: 8<\/p>\n<p>Explanation:<br \/>\nAs per the give data,<br \/>\nAlex has 48 stickers<br \/>\nThat means, X= 48<br \/>\nThis is 6 times the number of stickers max has = Y = 6X = 48<br \/>\nThen, number of stickers with Max = Y = X = 48\/6 = 8<br \/>\nNumber of stickers with Max = Y = 8 Stickers.<br \/>\nThus the answer is option c.<\/p>\n<p>Question 4.<br \/>\nAli\u2019s dog weighs 8 times as much as her cat. Together, the two pets weigh 54 pounds. How much does Ali\u2019s dog weigh?<br \/>\nOptions:<br \/>\na. 6 pounds<br \/>\nb. 42 pounds<br \/>\nc. 46 pounds<br \/>\nd. 48 pounds<\/p>\n<p>Answer: 48 pounds<\/p>\n<p>Explanation:<br \/>\nFrom the given data,<br \/>\nAli\u2019s cat weight = X<br \/>\nAli\u2019s dog weight = 8 times as much as Ali\u2019s cat = 8X<br \/>\nTogether, the two pets weight = (X + 8X) = 54 pounds<br \/>\n9X = 54 pounds<br \/>\nX = 54\/9 pounds = 6 pounds<br \/>\nThen, Ali\u2019s dog weight = 8X =8 x 6 = 48 pounds.<br \/>\nThus the answer is option d.<\/p>\n<p>Question 5.<br \/>\nAllison has 3 containers with 25 crayons in each. She also has 4 boxes of markers with 12 markers in each box. She gives 10 crayons to a friend. How many crayons and markers does Allison have now?<br \/>\nOptions:<br \/>\na. 34<br \/>\nb. 113<br \/>\nc. 123<br \/>\nd. 133<\/p>\n<p>Answer: 113<\/p>\n<p>Explanation:<br \/>\nAs per the given data,<br \/>\nAllison has 3 containers with 25 crayons in each = X = 3 \u00d7 25 = 75<br \/>\nAllison has 4 boxes of markers with 12 markers in each box = Y = 4 \u00d7 12 = 48<br \/>\nAllison gives 10 crayons to a friend = Z = 75 &#8211; 10 = 65<br \/>\nNow, total number of crayons and markers with Allison = Y + Z = 48 + 65 = 113<br \/>\nThus the answer is option b.<\/p>\n<p>Question 6.<br \/>\nThe state of Utah covers 82,144 square miles. The state of Montana covers 145,552 square miles. What is the total area of the two states?<br \/>\nOptions:<br \/>\na. 63,408 square miles<br \/>\nb. 223,408 square miles<br \/>\nc. 227,696 square miles<br \/>\nd. 966,992 square miles<\/p>\n<p>Answer: 227,696 square miles<\/p>\n<p>Explanation:<br \/>\nFrom the given data,<br \/>\nThe state of Utah covers 82,144 square miles<br \/>\nThe state of Montana covers 145,552 square miles<br \/>\nThen, Total area of the two states = 82,144 + 145,552<br \/>\nThe total area of two states = 227,696 square miles.<br \/>\nThus the answer is option c.<\/p>\n<h3><a id=\"Common_Core_Multiply_2_Digit_Numbers_Page_No_53\"><\/a>Common Core &#8211; Multiply 2-Digit Numbers &#8211; Page No. 53<\/h3>\n<p>Estimate Products<\/p>\n<p>Estimate the product. Choose a method.<\/p>\n<p>Question 1.<br \/>\n38 \u00d7 21<br \/>\n38 \u00d7 21<br \/>\n\u2193\u00a0 \u00a0 \u00a0 \u00a0 \u2193<br \/>\n40 \u00d7 20<br \/>\n<span style=\"text-decoration: underline;\">800<\/span><\/p>\n<p>Question 2.<br \/>\n63 \u00d7 19<br \/>\nEstimate: _______<\/p>\n<p>Answer: 1200<\/p>\n<p>Explanation:<br \/>\n63\u00a0 \u00a0 \u00a019<br \/>\n\u2193\u00a0 \u00a0 \u00a0 \u00a0 \u2193<br \/>\n60\u00a0 \u00a0 \u00a020<br \/>\nUse mental math<br \/>\n60 \u00d7 20 = 1200<\/p>\n<p>Question 3.<br \/>\n27 \u00d7 $42<br \/>\nEstimate: _______<\/p>\n<p>Answer: 1200<\/p>\n<p>Explanation:<br \/>\n27\u00a0 \u00a0 \u00a042<br \/>\n\u2193\u00a0 \u00a0 \u00a0 \u00a0 \u2193<br \/>\n30\u00a0 \u00a0 \u00a0 40<br \/>\nUse mental math<br \/>\n30 \u00d7 $40 = $1200<\/p>\n<p>Question 4.<br \/>\n73 \u00d7 67<br \/>\nEstimate: _______<\/p>\n<p>Answer: 4900<\/p>\n<p>Explanation:<br \/>\n73\u00a0 \u00a0 \u00a0 67<\/p>\n<p><img loading=\"lazy\" class=\"alignnone wp-image-2728\" src=\"https:\/\/i1.wp.com\/gomathanswerkey.com\/wp-content\/uploads\/2020\/07\/Go-Math-Grade-4-Answer-Key-Chapter-3-Multiply-2-Digit-Numbers.png?resize=15%2C46&amp;ssl=1\" alt=\"Go Math Grade 4 Answer Key Chapter 3 Multiply 2-Digit Numbers\" width=\"15\" height=\"46\" data-recalc-dims=\"1\" \/>\u00a0 \u00a0 \u00a0\u00a0<img loading=\"lazy\" class=\"alignnone wp-image-2728\" src=\"https:\/\/i1.wp.com\/gomathanswerkey.com\/wp-content\/uploads\/2020\/07\/Go-Math-Grade-4-Answer-Key-Chapter-3-Multiply-2-Digit-Numbers.png?resize=15%2C46&amp;ssl=1\" alt=\"Go Math Grade 4 Answer Key Chapter 3 Multiply 2-Digit Numbers\" width=\"15\" height=\"46\" data-recalc-dims=\"1\" \/><br \/>\n70\u00a0 \u00a0 \u00a0 70<br \/>\nUse mental math<br \/>\n70 \u00d7 70 = 4900<\/p>\n<p>Question 5.<br \/>\n37 \u00d7 $44<br \/>\nEstimate: _______<\/p>\n<p>Answer: 1600<\/p>\n<p>Explanation:<br \/>\n37\u00a0 \u00a0 \u00a044<br \/>\n\u2193\u00a0 \u00a0 \u00a0 \u00a0 \u2193<br \/>\n40\u00a0 \u00a0 \u00a040<br \/>\nUse mental math<br \/>\n40 \u00d7 $40 = $1600<\/p>\n<p>Question 6.<br \/>\n85 \u00d7 71<br \/>\nEstimate: _______<\/p>\n<p>Answer: 6300<\/p>\n<p>Explanation:<br \/>\n85\u00a0 \u00a0 \u00a071<br \/>\n\u2193\u00a0 \u00a0 \u00a0 \u00a0 \u2193<br \/>\n90\u00a0 \u00a0 \u00a070<br \/>\nUse mental math<br \/>\n90 \u00d7 70 = 6300<\/p>\n<p>Question 7.<br \/>\n88 \u00d7 56<br \/>\nEstimate: _______<\/p>\n<p>Answer: 5400<\/p>\n<p>Explanation:<br \/>\n88\u00a0 \u00a0 \u00a056<br \/>\n\u2193\u00a0 \u00a0 \u00a0 \u00a0 \u2193<br \/>\n90\u00a0 \u00a0 \u00a0 60<br \/>\nUse mental math<br \/>\n90 \u00d7 60 = 5400<\/p>\n<p>Question 8.<br \/>\n97 \u00d7 13<br \/>\nEstimate: _______<\/p>\n<p>Answer: 1000<\/p>\n<p>Explanation:<br \/>\n97\u00a0 \u00a0 \u00a013<br \/>\n\u2193\u00a0 \u00a0 \u00a0 \u00a0 \u2193<br \/>\n100\u00a0 \u00a0 10<br \/>\nUse mental math<br \/>\n100 \u00d7 10 = 1000<\/p>\n<p>Question 9.<br \/>\n92 \u00d7 64<br \/>\nEstimate: _______<\/p>\n<p>Answer: 5400<\/p>\n<p>Explanation:<br \/>\n92\u00a0 \u00a0 \u00a064<br \/>\n\u2193\u00a0 \u00a0 \u00a0 \u00a0 \u2193<br \/>\n90\u00a0 \u00a0 \u00a0 60<br \/>\nUse mental math<br \/>\n90 \u00d7 60 = 5400<\/p>\n<p><em><strong>Problem Solving<\/strong><\/em><\/p>\n<p>Question 10.<br \/>\nA dime has a diameter of about 18 millimeters. About how many millimeters long would a row of 34 dimes be?<br \/>\nabout ______ millimeters<\/p>\n<p>Answer:<\/p>\n<p>about 600 millimeters<\/p>\n<p>Explanation:<br \/>\nFrom the given data,<br \/>\nA dime has a diameter of about 18 millimeters<br \/>\nThen, 34 dimes diameter = 18 \u00d7 34<br \/>\n18 x 34<br \/>\n\u2193\u00a0 \u00a0 \u00a0 \u00a0 \u2193<br \/>\n20 \u00d7 30 = 600<br \/>\nSo, 34 dimes have a diameter of about 600 millimeters long<\/p>\n<p>Question 11.<br \/>\nA half-dollar has a diameter of about 31 millimeters. About how many millimeters long would a row of 56 half-dollars be?<br \/>\nabout ______ millimeters<\/p>\n<p>Answer: 1800 millimeters<\/p>\n<p>Explanation:<br \/>\nAs per the given data,<br \/>\nA half \u2013 dollar has a diameter of about 31 millimeters<br \/>\nThen, 56 half-dollars diameter = 31 \u00d7 56<br \/>\n31\u00a0 \u00a0 \u00a056<br \/>\n\u2193\u00a0 \u00a0 \u00a0 \u00a0 \u2193<br \/>\n30\u00a0 \u00a0 \u00a060<br \/>\nSo, 56 half-dollars have a diameter of about 1800 millimeters long.<\/p>\n<h3><a id=\"Common_Core_Multiply_2_Digit_Numbers_Page_No_54\"><\/a>Common Core &#8211; Multiply 2-Digit Numbers &#8211; Page No. 54<\/h3>\n<p><em><strong>Lesson Check<\/strong><\/em><\/p>\n<p>Question 1.<br \/>\nWhich is the best estimate for the product<br \/>\n43 \u00d7 68?<br \/>\nOptions:<br \/>\na. 3,500<br \/>\nb. 2,800<br \/>\nc. 2,400<br \/>\nd. 280<\/p>\n<p>Answer: 2,800<\/p>\n<p>Explanation:<br \/>\nRound to the nearest tens<br \/>\n43 \u00d7 68<br \/>\n\u2193\u00a0 \u00a0 \u00a0 \u00a0 \u2193<br \/>\n40 \u00d7 70<br \/>\nUse mental math<br \/>\n4 \u00d7 7 = 28<br \/>\n40 \u00d7 70 = 2800<br \/>\nEstimated product of 43 \u00d7 68 = 2800<br \/>\nThe correct answer is option b.<\/p>\n<p>Question 2.<br \/>\nMarissa burns 93 calories each time she plays fetch with her dog. She plays fetch with her dog once a day. About how many calories will Marissa burn playing fetch with her dog in 28 days?<br \/>\nOptions:<br \/>\na. 4,000<br \/>\nb. 2,700<br \/>\nc. 2,000<br \/>\nd. 270<\/p>\n<p>Answer: 2,700<\/p>\n<p>Explanation:<br \/>\nFrom the given data,<br \/>\nMarissa burned calories each time when she plays fetch with her dog= 93 calories<br \/>\nThen, Marissa burned calories in 28 days while playing fetch with her dog = 28 \u00d7 93<br \/>\nRound to the nearest tens<br \/>\n28 \u00d7 93<br \/>\n\u2193\u00a0 \u00a0 \u00a0 \u00a0 \u2193<br \/>\n30 \u00d7 90<br \/>\nThen, estimated burned calories in 28 days by Marissa = 2700 calories<br \/>\nThe correct answer is option b.<\/p>\n<p><em><strong>Spiral Review<\/strong><\/em><\/p>\n<p>Question 3.<br \/>\nUse the model to find 3 \u00d7 126.<br \/>\n<img loading=\"lazy\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2020\/07\/Go-Math-Grade-4-Answer-Key-Homework-Practice-FL-Chapter-3-Multiply-2-Digit-Numbers-img-1.jpg\" alt=\"Go Math Grade 4 Answer Key Homework Practice FL Chapter 3 Multiply 2-Digit Numbers Common Core - Multiply 2-Digit Numbers img 1\" width=\"252\" height=\"90\" \/><br \/>\nOptions:<br \/>\na. 368<br \/>\nb. 378<br \/>\nc. 468<br \/>\nd. 478<\/p>\n<p>Answer: 378<\/p>\n<p>Explanation:<br \/>\nFrom the above Figure,<br \/>\n3 \u00d7 126 = 3 \u00d7 100 + 3 \u00d7 20 + 3 \u00d7 6<br \/>\n= 300 + 60 + 18<br \/>\n= 378<br \/>\n3 \u00d7 126 = 378<br \/>\nThe correct answer is option b.<\/p>\n<p>Question 4.<br \/>\nA store sells a certain brand of jeans for $38. One day, the store sold 6 pairs of jeans of that brand. How much money did the store make from selling the 6 pairs of jeans?<br \/>\nOptions:<br \/>\na. $188<br \/>\nb. $228<br \/>\nc. $248<br \/>\nd. $288<\/p>\n<p>Answer: $228<\/p>\n<p>Explanation:<br \/>\nAs per the given data,<br \/>\nA store sells a certain brand of jeans for rupees = $38<br \/>\nOne day, the store sold 6 pairs of jeans of that brand = 6 \u00d7 $38<br \/>\n6 \u00d7 $38 = $228<br \/>\nThe total amount of 6 pairs of jeans = $228<br \/>\nThe correct answer is option b.<\/p>\n<p>Question 5.<br \/>\nThe Gateway Arch in St. Louis, Missouri, weighs about 20,000 tons. Which amount could be the exact number of tons the Arch weighs?<br \/>\nOptions:<br \/>\na. 31,093 tons<br \/>\nb. 25,812 tons<br \/>\nc. 17,246 tons<br \/>\nd. 14,096 tons<\/p>\n<p>Answer: 17,246 tons<\/p>\n<p>Explanation:<br \/>\nFrom the given data,<br \/>\nThe Gateway Arch in St.Louis, Missouri weight = about 20,000 tons<br \/>\nFrom the available options, 17,246 tons is closer to 20,000 tons<br \/>\nThen, the exact number of tons the Arch weighs = 17,246 tons<br \/>\nThe correct answer is option c.<\/p>\n<p>Question 6.<br \/>\nWhich is another name for 23 ten thousands?<br \/>\nOptions:<br \/>\na. 23,000,000<br \/>\nb. 2,300,000<br \/>\nc. 230,000<br \/>\nd. 23,000<\/p>\n<p>Answer: 230,000<\/p>\n<p>Explanation:<br \/>\nAs per the data,<br \/>\nAnother name for 23 ten thousands = 23 \u00d7 10,000<br \/>\n= 230,000<br \/>\nAnother name for 23 ten thousand = 230,000<br \/>\nThe correct answer is option c.<\/p>\n<h3><a id=\"Common_Core_Multiply_2_Digit_Numbers_Page_No_55\"><\/a>Common Core &#8211; Multiply 2-Digit Numbers &#8211; Page No. 55<\/h3>\n<p><strong>Area Models and Partial Products<\/strong><\/p>\n<p><strong>Draw a model to represent the product.<\/strong><br \/>\n<strong>Then record the product.<\/strong><\/p>\n<p>Question 1.<br \/>\n13 \u00d7 42<br \/>\n<img loading=\"lazy\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2020\/07\/Go-Math-Grade-4-Answer-Key-Homework-Practice-FL-Chapter-3-Multiply-2-Digit-Numbers-img-2.jpg\" alt=\"Go Math Grade 4 Answer Key Homework Practice FL Chapter 3 Multiply 2-Digit Numbers Common Core - Multiply 2-Digit Numbers img 2\" width=\"270\" height=\"179\" \/><\/p>\n<p>Question 2.<br \/>\n18 \u00d7 34 = _____<\/p>\n<p>Answer:<br \/>\n<img src=\"https:\/\/i1.wp.com\/gomathanswerkey.com\/wp-content\/uploads\/2020\/07\/chapter-3-Area-models-and-partial-products-image-1.-jpg.jpg?resize=228%2C132&amp;ssl=1\" alt=\"chapter 3 - Area models and partial products- image 1. jpg\" \/><br \/>\n300 + 40 + 240 + 32 = 612<\/p>\n<p>Question 3.<br \/>\n22 \u00d7 26 = _____<\/p>\n<p>Answer:<br \/>\n<img src=\"https:\/\/i2.wp.com\/gomathanswerkey.com\/wp-content\/uploads\/2020\/07\/chapter-3-Area-models-and-partial-products-image-2.-jpg.jpg?resize=222%2C131&amp;ssl=1\" alt=\"chapter 3 - Area models and partial products- image 2. jpg\" \/><\/p>\n<p>400 + 120 + 40 + 12 = 572<\/p>\n<p>Question 4.<br \/>\n15 \u00d7 33 = _____<\/p>\n<p>Answer:<br \/>\n<img src=\"https:\/\/i0.wp.com\/gomathanswerkey.com\/wp-content\/uploads\/2020\/07\/chapter-3-Area-models-and-partial-products-image-3.-jpg.jpg?resize=212%2C141&amp;ssl=1\" alt=\"chapter 3 - Area models and partial products- image 3. jpg\" \/><\/p>\n<p>300 + 30 + 150 + 15 = 495<\/p>\n<p>Question 5.<br \/>\n23 \u00d7 29 = _____<\/p>\n<p>Answer:<br \/>\n<img src=\"https:\/\/i1.wp.com\/gomathanswerkey.com\/wp-content\/uploads\/2020\/07\/chapter-3-Area-models-and-partial-products-image-4.-jpg.jpg?resize=220%2C132&amp;ssl=1\" alt=\"chapter 3 - Area models and partial products- image 4. jpg\" \/><\/p>\n<p>400 + 180 + 60 + 27 = 667<\/p>\n<p>Question 6.<br \/>\n19 \u00d7 36 = _____<\/p>\n<p>Answer:<br \/>\n<img src=\"https:\/\/i2.wp.com\/gomathanswerkey.com\/wp-content\/uploads\/2020\/07\/chapter-3-Area-models-and-partial-products-image-5.-jpg.jpg?resize=212%2C141&amp;ssl=1\" alt=\"chapter 3 - Area models and partial products- image 5. jpg\" \/><\/p>\n<p>300 + 60 + 270 + 54 = 684<\/p>\n<p><em><strong>Problem Solving<\/strong><\/em><\/p>\n<p>Question 7.<br \/>\nSebastian made the following model to find the product 17 \u00d7 24.<br \/>\n<img loading=\"lazy\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2020\/07\/Go-Math-Grade-4-Answer-Key-Homework-Practice-FL-Chapter-3-Multiply-2-Digit-Numbers-img-3.jpg\" alt=\"Go Math Grade 4 Answer Key Homework Practice FL Chapter 3 Multiply 2-Digit Numbers Common Core - Multiply 2-Digit Numbers img 3\" width=\"299\" height=\"182\" \/><br \/>\nIs his model correct? Explain.<br \/>\ni. yes<br \/>\nii. no<\/p>\n<p>Answer: no<br \/>\n<img src=\"https:\/\/i2.wp.com\/gomathanswerkey.com\/wp-content\/uploads\/2020\/07\/chapter-3-Area-models-and-partial-products-image-6.-jpg.jpg?resize=222%2C130&amp;ssl=1\" alt=\"chapter 3 - Area models and partial products- image 6. jpg\" \/><\/p>\n<p>200 + 40 + 140 + 28 = 408<\/p>\n<p>Question 8.<br \/>\nEach student in Ms. Sike\u2019s kindergarten class has a box of crayons. Each box has 36 crayons. If there are 18 students in Ms. Sike\u2019s class, how many crayons are<br \/>\nthere in all?<br \/>\n_____ crayons<\/p>\n<p>Answer: 648 crayons<\/p>\n<p>Explanation:<br \/>\nFrom the given information,<br \/>\nEach student in Ms.Sike\u2019s kindergarten class has a box of crayons<br \/>\nCrayons in each box = 36 Crayons<br \/>\nNumber of students in Mr.Sike\u2019s class = 18 students<br \/>\nTotal crayons = 18 \u00d7 36<br \/>\n<img src=\"https:\/\/i0.wp.com\/gomathanswerkey.com\/wp-content\/uploads\/2020\/07\/chapter-3-Area-models-and-partial-products-image-7.-jpg.jpg?resize=206%2C127&amp;ssl=1\" alt=\"chapter 3 - Area models and partial products- image 7. jpg\" \/><\/p>\n<p>300 + 60 + 240 + 48 = 648<\/p>\n<h3><a id=\"Common_Core_Multiply_2_Digit_Numbers_Page_No_56\"><\/a>Common Core &#8211; Multiply 2-Digit Numbers &#8211; Page No. 56<\/h3>\n<p><em><strong>Lesson Check<\/strong><\/em><\/p>\n<p>Question 1.<br \/>\nWhich product does the model below represent?<br \/>\n<img loading=\"lazy\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2020\/07\/Go-Math-Grade-4-Answer-Key-Homework-Practice-FL-Chapter-3-Multiply-2-Digit-Numbers-img-4.jpg\" alt=\"Go Math Grade 4 Answer Key Homework Practice FL Chapter 3 Multiply 2-Digit Numbers Common Core - Multiply 2-Digit Numbers img 4\" width=\"275\" height=\"147\" \/><br \/>\nOptions:<br \/>\na. 161<br \/>\nb. 230<br \/>\nc. 340<br \/>\nd. 391<\/p>\n<p>Answer: 391<\/p>\n<p>Explanation:<br \/>\n200 + 30 + 140 + 21 = 391<br \/>\n17 \u00d7 23 = 391<br \/>\nThe correct answer is option d.<\/p>\n<p>Question 2.<br \/>\nWhich product does the model below represent?<br \/>\n<img loading=\"lazy\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2020\/07\/Go-Math-Grade-4-Answer-Key-Homework-Practice-FL-Chapter-3-Multiply-2-Digit-Numbers-img-5.jpg\" alt=\"Go Math Grade 4 Answer Key Homework Practice FL Chapter 3 Multiply 2-Digit Numbers Common Core - Multiply 2-Digit Numbers img 5\" width=\"276\" height=\"149\" \/><br \/>\nOptions:<br \/>\na. 219<br \/>\nb. 225<br \/>\nc. 244<br \/>\nd. 275<\/p>\n<p>Answer: 225<\/p>\n<p>Explanation:<br \/>\n130 + 20 + 65 + 10 = 225<br \/>\n15 \u00d7 15 = 225<br \/>\nThe correct answer is option b.<\/p>\n<p><em><strong>Spiral Review<\/strong><\/em><\/p>\n<p>Question 3.<br \/>\nMariah builds a tabletop using square tiles. There are 12 rows of tiles and 30 tiles in each row. How many tiles in all does Mariah use?<br \/>\nOptions:<br \/>\na. 100<br \/>\nb. 180<br \/>\nc. 360<br \/>\nd. 420<\/p>\n<p>Answer: 360<\/p>\n<p>Explanation:<br \/>\nFrom the given data,<br \/>\nMariah builds a tabletop using square tiles<br \/>\nSquare contains 12 rows of tiles and 30 tiles in each row = 12 \u00d7 30<br \/>\n12 \u00d7 30 = 360 tiles<br \/>\nTotal tiles used by Mariah = 360 tiles<br \/>\nThe correct answer is option c.<\/p>\n<p>Question 4.<br \/>\nTrevor bakes 8 batches of biscuits, with 14 biscuits in each batch. He sets aside 4 biscuits from each batch for a bake sale and puts the rest in a jar. How many biscuits does Trevor put in the jar?<br \/>\nOptions:<br \/>\na. 112<br \/>\nb. 80<br \/>\nc. 50<br \/>\nd. 32<\/p>\n<p>Answer: 80<\/p>\n<p>Explanation:<br \/>\nAs per the given data,<br \/>\nNumber of biscuits baked by Trevor = 8 batches<br \/>\nNumber of biscuits in each batch = 14 biscuits<br \/>\nSo, total biscuits = 14 \u00d7 8 = 112<br \/>\nTrevor sets aside 4 biscuits from each batch for a bake = 8 \u00d7 4 = 32 biscuits are aside for a bake<br \/>\nTrevor kept rest of biscuits in a jar = 112 \u2013 32 = 80<br \/>\nSo, 80 biscuits are put in the jar by Trevor.<br \/>\nThe correct answer is option b.<\/p>\n<p>Question 5.<br \/>\nLi feeds her dog 3 cups of food each day. About how many cups of food does her dog eat in 28 days?<br \/>\nOptions:<br \/>\na. 60 cups<br \/>\nb. 70 cups<br \/>\nc. 80 cups<br \/>\nd. 90 cups<\/p>\n<p>Answer: 80 cups<\/p>\n<p>Explanation:<br \/>\nAs per the given data,<br \/>\nLi feeds her dog per day = 3 cups of food<br \/>\nThen, Li feeds her dog for 28 days = 3 \u00d7 28 = 84 cups of food<br \/>\nSo, Li feeds her dog with 84 cups of food in 28 days.<br \/>\nThe correct answer is option c.<\/p>\n<p>Question 6.<br \/>\nWhich symbol makes the number sentence true?<br \/>\n4 \u25a0 0 = 0<br \/>\nOptions:<br \/>\na. +<br \/>\nb. &#8211;<br \/>\nc. \u00d7<br \/>\nd. \u00f7<\/p>\n<p>Answer: \u00d7<\/p>\n<p>Explanation:<br \/>\n4 x 0 = 0<\/p>\n<h3><a id=\"Common_Core_Multiply_2_Digit_Numbers_Page_No_57\"><\/a>Common Core &#8211; Multiply 2-Digit Numbers &#8211; Page No. 57<\/h3>\n<p><strong>Multiply Using Partial Products<\/strong><\/p>\n<p><strong>Record the product.<\/strong><\/p>\n<p>Question 1.<br \/>\n2 3<br \/>\n\u00d7 7 9<br \/>\n1, 4 0 0<br \/>\n&#8212;&#8212;&#8212;<br \/>\n2 1 0<br \/>\n1 8 0<br \/>\n+ 2 7<br \/>\n&#8212;&#8212;&#8212;<br \/>\n1, 8 17<\/p>\n<p>Question 2.<br \/>\n5 6<br \/>\n\u00d7 3 2<br \/>\n&#8212;&#8212;&#8212;<br \/>\n________<\/p>\n<p>Answer: 1,792<\/p>\n<p>Explanation:<br \/>\n<img src=\"https:\/\/i1.wp.com\/gomathanswerkey.com\/wp-content\/uploads\/2020\/07\/Chapter-3-Common-core-Image-7.jpg?resize=137%2C218&amp;ssl=1\" alt=\"Chapter 3 - Common core - Image 7\" \/><\/p>\n<p>Question 3.<br \/>\n8 7<br \/>\n\u00d7 6 4<br \/>\n&#8212;&#8212;&#8212;<br \/>\n________<\/p>\n<p>Answer: 5,568<\/p>\n<p>Explanation:<br \/>\n<img src=\"https:\/\/i1.wp.com\/gomathanswerkey.com\/wp-content\/uploads\/2020\/07\/Chapter-3-Common-core-Image-8.jpg?resize=217%2C235&amp;ssl=1\" alt=\"Chapter 3 - Common core - Image 8\" \/><\/p>\n<p>Question 4.<br \/>\n3 3<br \/>\n\u00d7 2 5<br \/>\n&#8212;&#8212;&#8212;<br \/>\n________<\/p>\n<p>Answer: 825<\/p>\n<p>Explanation:<br \/>\n<img src=\"https:\/\/i0.wp.com\/gomathanswerkey.com\/wp-content\/uploads\/2020\/07\/Chapter-3-Common-core-Image-9.jpg?resize=222%2C224&amp;ssl=1\" alt=\"Chapter 3 - Common core - Image 9\" \/><\/p>\n<p>Question 5.<br \/>\n9 4<br \/>\n\u00d7 1 2<br \/>\n&#8212;&#8212;&#8212;<br \/>\n________<\/p>\n<p>Answer: 1,128<\/p>\n<p>Explanation:<br \/>\n<img src=\"https:\/\/i0.wp.com\/gomathanswerkey.com\/wp-content\/uploads\/2020\/07\/Chapter-3-Common-core-Image-10.jpg?resize=216%2C229&amp;ssl=1\" alt=\"Chapter 3 - Common core - Image 10\" \/><\/p>\n<p>Question 6.<br \/>\n5 1<br \/>\n\u00d7 7 7<br \/>\n&#8212;&#8212;&#8212;<br \/>\n________<\/p>\n<p>Answer: 3,927<\/p>\n<p>Explanation:<br \/>\n<img src=\"https:\/\/i2.wp.com\/gomathanswerkey.com\/wp-content\/uploads\/2020\/07\/Chapter-3-Common-core-Image-11.jpg?resize=218%2C230&amp;ssl=1\" alt=\"Chapter 3 - Common core - Image 11\" \/><\/p>\n<p>Question 7.<br \/>\n6 9<br \/>\n\u00d7 4 9<br \/>\n&#8212;&#8212;&#8212;<br \/>\n________<\/p>\n<p>Answer: 3,381<\/p>\n<p>Explanation:<br \/>\n<img src=\"https:\/\/i0.wp.com\/gomathanswerkey.com\/wp-content\/uploads\/2020\/07\/Chapter-3-Common-core-Image-12.jpg?resize=223%2C220&amp;ssl=1\" alt=\"Chapter 3 - Common core - Image 12\" \/><\/p>\n<p>Question 8.<br \/>\n8 6<br \/>\n\u00d7 8 4<br \/>\n&#8212;&#8212;&#8212;<br \/>\n________<\/p>\n<p>Answer: 7,224<\/p>\n<p>Explanation:<br \/>\n<img src=\"https:\/\/i2.wp.com\/gomathanswerkey.com\/wp-content\/uploads\/2020\/07\/Chapter-3-Common-core-Image-13.jpg?resize=217%2C219&amp;ssl=1\" alt=\"Chapter 3 - Common core - Image 13\" \/><\/p>\n<p>Question 9.<br \/>\n9 8<br \/>\n\u00d7 4 2<br \/>\n&#8212;&#8212;&#8212;<br \/>\n________<\/p>\n<p>Answer: 4,116<\/p>\n<p>Explanation:<br \/>\n<img src=\"https:\/\/i1.wp.com\/gomathanswerkey.com\/wp-content\/uploads\/2020\/07\/Chapter-3-Common-core-Image-14.jpg?resize=215%2C223&amp;ssl=1\" alt=\"Chapter 3 - Common core - Image 14\" \/><\/p>\n<p>Question 10.<br \/>\n7 3<br \/>\n\u00d7 3 7<br \/>\n&#8212;&#8212;&#8212;<br \/>\n________<\/p>\n<p>Answer: 2,701<\/p>\n<p>Explanation:<br \/>\n<img src=\"https:\/\/i1.wp.com\/gomathanswerkey.com\/wp-content\/uploads\/2020\/07\/Chapter-3-Common-core-Image-15.jpg?resize=215%2C229&amp;ssl=1\" alt=\"Chapter 3 - Common core - Image 15\" \/><\/p>\n<p>Question 11.<br \/>\n8 5<br \/>\n\u00d7 5 1<br \/>\n&#8212;&#8212;&#8212;<br \/>\n________<\/p>\n<p>Answer: 4,335<\/p>\n<p>Explanation:<br \/>\n<img src=\"https:\/\/i2.wp.com\/gomathanswerkey.com\/wp-content\/uploads\/2020\/07\/Chapter-3-Common-core-Image-16.jpg?resize=213%2C221&amp;ssl=1\" alt=\"Chapter 3 - Common core - Image 16\" \/><\/p>\n<p><em><strong>Problem Solving<\/strong><\/em><\/p>\n<p>Question 12.<br \/>\nEvelyn drinks 8 glasses of water a day, which is 56 glasses of water a week. How many glasses of water does she drink in a year? (1 year = 52 weeks)<br \/>\n______ glasses<\/p>\n<p>Answer: 2,912 glasses<\/p>\n<p>Explanation:<br \/>\nAs per the given data,<br \/>\nEvelyn drinks 8 glasses of water a day<br \/>\nEvelyn drinks water per week = 56 glasses<br \/>\nThen, the number of glasses per 52 weeks = 52 \u00d7 56<br \/>\n<img src=\"https:\/\/i2.wp.com\/gomathanswerkey.com\/wp-content\/uploads\/2020\/07\/Chapter-3-Common-core-Image-17.jpg?resize=211%2C218&amp;ssl=1\" alt=\"Chapter 3 - Common core - Image 17\" \/><br \/>\nTotal number of glasses of water drink by Evelyn per year = 2912 glasses of water<\/p>\n<p>Question 13.<br \/>\nJoe wants to use the Hiking Club\u2019s funds to purchase new walking sticks for each of its 19 members. The sticks cost $26 each. The club has $480. Is this enough money to buy each member a new walking stick? If not, how much more money is needed?<br \/>\nIs the money enough? ________<br \/>\nHow much more is needed? ________<\/p>\n<p>Answer:<br \/>\nThis amount is not enough to buy walking sticks<br \/>\nStill, $14 amount is needed to buy walking sticks<\/p>\n<p>Explanation:<br \/>\nFrom the given data,<br \/>\nJoe wants to use the Hiking club funds to purchase new walking sticks for each of its 19 members<br \/>\nCost per each stick = $26<br \/>\nTotal walking sticks cost per 19 members = $26 \u00d7 19<br \/>\n<img src=\"https:\/\/i2.wp.com\/gomathanswerkey.com\/wp-content\/uploads\/2020\/07\/Chapter-3-Common-core-Image-18.jpg?resize=217%2C223&amp;ssl=1\" alt=\"Chapter 3 - Common core - Image 18\" \/><\/p>\n<p>Total cost for walking sticks for 19 members = $494<br \/>\nThe club has = $480<br \/>\nThis amount is not enough to buy walking sticks.<br \/>\nStill, $14 amount is needed to buy walking sticks.<\/p>\n<h3><a id=\"Common_Core_Multiply_2_Digit_Numbers_Page_No_58\"><\/a>Common Core &#8211; Multiply 2-Digit Numbers &#8211; Page No. 58<\/h3>\n<p><em><strong>Lesson Check<\/strong><\/em><\/p>\n<p>Question 1.<br \/>\nA carnival snack booth made $76 selling popcorn in one day. It made 22 times as much selling cotton candy. How much money did the snack booth make selling<br \/>\ncotton candy?<br \/>\nOptions:<br \/>\na. $284<br \/>\nb. $304<br \/>\nc. $1,562<br \/>\nd. $1,672<\/p>\n<p>Answer: $1,672<\/p>\n<p>Explanation:<br \/>\nAs per the given data,<br \/>\nA carnival snack booth made popcorn in one day = $76<br \/>\nIt made 22 times as much selling cotton candy<br \/>\nThen, total selling cotton candy made by snack booth = $76 \u00d7 22<br \/>\n<img src=\"https:\/\/i1.wp.com\/gomathanswerkey.com\/wp-content\/uploads\/2020\/07\/Chapter-3-Common-core-Image-19.jpg?resize=215%2C226&amp;ssl=1\" alt=\"Chapter 3 - Common core - Image 19\" \/><\/p>\n<p>So, $1672 money snack booth will get for selling cotton candy.<br \/>\nThus the correct answer is option d.<\/p>\n<p>Question 2.<br \/>\nWhat are the partial products of<br \/>\n42 \u00d7 28?<br \/>\nOptions:<br \/>\na. 800, 80, 40, 16<br \/>\nb. 800, 16<br \/>\nc. 800, 40, 320, 16<br \/>\nd. 80, 16<\/p>\n<p>Answer: 800, 40, 320, 16<\/p>\n<p>Explanation:<br \/>\n<img src=\"https:\/\/i0.wp.com\/gomathanswerkey.com\/wp-content\/uploads\/2020\/07\/Chapter-3-Common-core-Image-20.jpg?resize=218%2C223&amp;ssl=1\" alt=\"Chapter 3 - Common core - Image 20\" \/><\/p>\n<p>So, partial products of 42 x 28 are 800, 40, 320, 16<br \/>\nThus the correct answer is option c.<\/p>\n<p><em><strong>Spiral Review<\/strong><\/em><\/p>\n<p>Question 3.<br \/>\nLast year, the city library collected 117 used books for its shelves. This year, it collected 3 times as many books. How many books did it collect this year?<br \/>\nOptions:<br \/>\na. 832<br \/>\nb. 428<br \/>\nc. 351<br \/>\nd. 72<\/p>\n<p>Answer: 351<\/p>\n<p>Explanation:<br \/>\nFrom the given data,<br \/>\nLast year, the number of used books collected by the city library by its shelves = 117 books<br \/>\nThis year, it collected 3 times as many books = 3 \u00d7 117 =351 books<br \/>\nTotal number of books collected by the city library for this year = 351 books<br \/>\nThus the correct answer is option c.<\/p>\n<p>Question 4.<br \/>\nWashington Elementary has 232 students. Washington High has 6 times as many students. How many students does Washington High have?<br \/>\nOptions:<br \/>\na. 1,392<br \/>\nb. 1,382<br \/>\nc. 1,292<br \/>\nd. 1,281<\/p>\n<p>Answer: 1,392<\/p>\n<p>Explanation:<br \/>\nAs per the given data,<br \/>\nThe number of students in Washington elementary = 232 students<br \/>\nWashington High has 6 times as many students = 6 x 232 = 1392<br \/>\nTotal number of students in Washington High = 1392 students<br \/>\nThus the correct answer is option a.<\/p>\n<p>Question 5.<br \/>\nWhat are the partial products of 35 \u00d7 7?<br \/>\nOptions:<br \/>\na. 10, 12<br \/>\nb. 21, 35<br \/>\nc. 210, 35<br \/>\nd. 350, 21<\/p>\n<p>Answer: 210, 35<\/p>\n<p>Explanation:<br \/>\nPartial products of 35 x 7 are 210, 35<br \/>\nThus the correct answer is option c.<\/p>\n<p>Question 6.<br \/>\nShelby has ten $5 bills and thirteen $10 bills. How much money does Shelby have in all?<br \/>\nOptions:<br \/>\na. $15<br \/>\nb. $60<br \/>\nc. $63<br \/>\nd. $180<\/p>\n<p>Answer: $180<\/p>\n<p>Explanation:<br \/>\nFrom the given data,<br \/>\nShelby has ten $5 bills and thirteen $10 bills = (10 x $5) + (13 x $10)<br \/>\n= ($50) + ($130)<br \/>\n=$180<br \/>\nTotal money with Shelby = $180<br \/>\nThus the correct answer is option d.<\/p>\n<h3><a id=\"Common_Core_Multiply_2_Digit_Numbers_Page_No_59\"><\/a>Common Core &#8211; Multiply 2-Digit Numbers &#8211; Page No. 59<\/h3>\n<p><strong>Multiply with Regrouping<\/strong><br \/>\n<strong>Estimate. Then find the product.<\/strong><\/p>\n<p>Question 1.<br \/>\nEstimate: <span style=\"text-decoration: underline;\">2,700<\/span><br \/>\nThink: 87 is close to 90 and 32 is close to 30.<br \/>\n90 \u00d7 30 = 2,700<br \/>\n<img loading=\"lazy\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2020\/07\/Go-Math-Grade-4-Answer-Key-Homework-Practice-FL-Chapter-3-Multiply-2-Digit-Numbers-img-6.jpg\" alt=\"Go Math Grade 4 Answer Key Homework Practice FL Chapter 3 Multiply 2-Digit Numbers Common Core - Multiply 2-Digit Numbers img 6\" width=\"94\" height=\"142\" \/><\/p>\n<p>Question 2.<br \/>\n7 3<br \/>\n\u00d7 2 8<br \/>\n&#8212;&#8212;&#8212;<br \/>\nEstimate: _______<br \/>\nProduct: _______<\/p>\n<p>Answer:<br \/>\nEstimate: 2,100<br \/>\nProduct: 2,044<\/p>\n<p>Explanation:<br \/>\nEstimate: 73 is close to 70; 28 is close to 30.<br \/>\nSo, 70 \u00d7 30 = 2,100.<br \/>\nProduct: Write 73 as 7 tens and 3 ones. Multiply 28 by 3 ones.<br \/>\n2<br \/>\n28<br \/>\n\u00d7 73<br \/>\n\u2014\u2014\u2013<br \/>\n84 &lt;\u2013 3 \u00d7 28<br \/>\nMultiply 28 by 7 tens<br \/>\n5<br \/>\n28<br \/>\n\u00d7 73<br \/>\n\u2014\u2014\u2013<br \/>\n1960 &lt;\u2013 70 \u00d7 28<br \/>\nAdd the partial products.<br \/>\n84 + 1960 = 2,044.<br \/>\nSo, 73 \u00d7 28 = 2,044.<\/p>\n<p>Question 3.<br \/>\n4 8<br \/>\n\u00d7 3 8<br \/>\n&#8212;&#8212;&#8212;<br \/>\nEstimate: _______<br \/>\nProduct: _______<\/p>\n<p>Answer:<br \/>\nEstimate: 2,000<br \/>\nProduct: 1,824<\/p>\n<p>Explanation:<br \/>\n48 is close to 50 and 38 is close to 40.<br \/>\nEstimate: 50 \u00d7 40 = 2,000<br \/>\n40 \u00d7 38 = 1520<br \/>\n8 \u00d7 38 = 304<br \/>\n1520 + 304 = 1824.<br \/>\nProduct: 1,824<\/p>\n<p>Question 4.<br \/>\n5 9<br \/>\n\u00d7 5 2<br \/>\n&#8212;&#8212;&#8212;<br \/>\nEstimate: _______<br \/>\nProduct: _______<\/p>\n<p>Answer:<br \/>\nEstimate: 3,000<br \/>\nProduct: 3,068<\/p>\n<p>Explanation:<br \/>\n59 is close to 60 and 52 is close to 50.<br \/>\nEstimate: 60 \u00d7 50 = 3,000<br \/>\n50 \u00d7 52 = 2600<br \/>\n9 \u00d7 52 = 468<br \/>\n2600 + 468 = 3068.<br \/>\nProduct: 3,068.<\/p>\n<p>Question 5.<br \/>\n8 4<br \/>\n\u00d7 4 0<br \/>\n&#8212;&#8212;&#8212;<br \/>\nEstimate: _______<br \/>\nProduct: _______<\/p>\n<p>Answer:<br \/>\nEstimate: 3,200<br \/>\nProduct: 3,360<\/p>\n<p>Explanation:<br \/>\n84 is close to 80 and 40 is close to 40.<br \/>\nEstimate: 80 \u00d7 40 = 3,200<br \/>\n80 \u00d7 40 = 3,200<br \/>\n4 \u00d7 40 = 160<br \/>\n3200 + 160 = 3,360.<br \/>\nProduct: 3,360.<\/p>\n<p>Question 6.<br \/>\n8 3<br \/>\n\u00d7 7 7<br \/>\n&#8212;&#8212;&#8212;<br \/>\nEstimate: _______<br \/>\nProduct: _______<\/p>\n<p>Answer:<br \/>\nEstimate: 6,400<br \/>\nProduct: 6,391<\/p>\n<p>Explanation:<br \/>\n83 is close to 80 and 77 is close to 80.<br \/>\nEstimate: 80 \u00d7 80 = 6,400<br \/>\n80 \u00d7 77 = 6,160<br \/>\n3 \u00d7 77 = 231<br \/>\n6,160 + 231 = 6,391.<br \/>\nProduct: 6,391.<\/p>\n<p>Question 7.<br \/>\n9 1<br \/>\n\u00d7 1 9<br \/>\n&#8212;&#8212;&#8212;<br \/>\nEstimate: _______<br \/>\nProduct: _______<\/p>\n<p>Answer:<\/p>\n<p>Estimate: 1,800<br \/>\nProduct: 1,729<\/p>\n<p>Explanation:<br \/>\n91 is close to 90 and 19 is close to 20.<br \/>\nEstimate: 90 \u00d7 20 = 1,800<br \/>\n90 \u00d7 19 = 1,710<br \/>\n1 \u00d7 19 = 19<br \/>\n1,710+ 19 = 1,729.<br \/>\nProduct: 1,729.<\/p>\n<p><em><strong>Problem Solving<\/strong><\/em><\/p>\n<p>Question 8.<br \/>\nBaseballs come in cartons of 84 baseballs. A team orders 18 cartons of baseballs. How many baseballs does the team order?<br \/>\n______ baseballs<\/p>\n<p>Answer: 1,512 baseballs<\/p>\n<p>Explanation:<br \/>\nGiven,<br \/>\nBaseballs come in cartons of 84 baseballs.<br \/>\nA team orders 18 cartons of baseballs.<br \/>\nTo find total baseballs, 84 \u00d7 18<br \/>\n80 \u00d7 18 = 1,440<br \/>\n4 \u00d7 18 = 72<br \/>\n84 \u00d7 18 = 1,512<br \/>\nThus the team order 1512 baseballs.<\/p>\n<p>Question 9.<br \/>\nThere are 16 tables in the school lunch room. Each table can seat 22 students. How many students can be seated at lunch at one time?<br \/>\n______ students<\/p>\n<p>Answer: 352 students<\/p>\n<p>Explanation:<br \/>\nGiven,<br \/>\nThere are 16 tables in the school lunch room.<br \/>\nEach table can seat 22 students.<br \/>\nTotal Students = 16 \u00d7 22<br \/>\n10 \u00d7 22 = 220<br \/>\n6 \u00d7 22 = 132<br \/>\n220 + 132 = 352.<br \/>\n352 students can be seated at lunch at one time.<\/p>\n<h3><a id=\"Common_Core_Multiply_2_Digit_Numbers_Page_No_60\"><\/a>Common Core &#8211; Multiply 2-Digit Numbers &#8211; Page No. 60<\/h3>\n<p><em><strong>Lesson Check<\/strong><\/em><\/p>\n<p>Question 1.<br \/>\nThe art teacher has 48 boxes of crayons. There are 64 crayons in each box. Which is the best estimate of the number of crayons the art teacher has?<br \/>\nOptions:<br \/>\na. 2,400<br \/>\nb. 2,800<br \/>\nc. 3,000<br \/>\nd. 3,500<\/p>\n<p>Answer: 3,000<\/p>\n<p>Explanation:<br \/>\nGiven,<br \/>\nThe art teacher has 48 boxes of crayons. There are 64 crayons in each box.<br \/>\nTotal number of crayons = 48 \u00d7 64<br \/>\n48 is close to 50; 64 is close to 60<br \/>\n50 \u00d7 60 = 3,000.<br \/>\nThe art teacher has about 3, 000 crayons.<br \/>\nThe correct answer is option c.<\/p>\n<p>Question 2.<br \/>\nA basketball team scored an average of 52 points in each of 15 games. How many points did the team score in all?<br \/>\nOptions:<br \/>\na. 500<br \/>\nb. 312<br \/>\nc. 780<br \/>\nd. 1,000<\/p>\n<p>Answer: 780<\/p>\n<p>Explanation:<br \/>\nGiven,<br \/>\nA basketball team scored an average of 52 points in each of 15 games.<br \/>\nTotal Points = 52 \u00d7 15<br \/>\n50 \u00d7 15 = 750<br \/>\n2 \u00d7 15 = 30<br \/>\n750 + 30 = 780.<br \/>\nThe basketball team scored 780 points in total.<br \/>\nThe correct answer is option c.<\/p>\n<p><em><strong>Spiral Review<\/strong><\/em><\/p>\n<p>Question 3.<br \/>\nOne Saturday, an orchard sold 83 bags of apples. There are 27 apples in each bag. Which expression represents the total number of apples sold?<br \/>\nOptions:<br \/>\na. 16 + 6 + 56 + 21<br \/>\nb. 160 + 60 + 56 + 21<br \/>\nc. 160 + 60 + 560 + 21<br \/>\nd. 1,600 + 60 + 560 + 21<\/p>\n<p>Answer: 1,600 + 60 + 560 + 21<\/p>\n<p>Explanation:<br \/>\nTotal number of apples sold = 83 \u00d7 27<br \/>\n80 \u00d7 27 = 2,160<br \/>\n3 \u00d7 27 = 81<br \/>\n2,160 + 81 = 2,241.<br \/>\nThe total number of apples sold = 2,241.<br \/>\n16 + 6 + 56 + 21 = 99 not equal to 2,241<br \/>\n160 + 60 + 56 + 21 = 297 not equal to 2,241<br \/>\n160 + 60 + 560 + 21 = 801 not equal to 2,241<br \/>\n1,600 + 60 + 560 + 21 = 2,241 equal to 2,241<br \/>\n1,600 + 60 + 560 + 21 = 2,241 is correct.<br \/>\nThe correct answer is option d.<\/p>\n<p>Question 4.<br \/>\nHannah has a grid of squares that has 12 rows with 15 squares in each row. She colors 5 rows of 8 squares in the middle of the grid blue. She colors the rest of the squares red. How many squares does Hannah color red?<br \/>\nOptions:<br \/>\na. 40<br \/>\nb. 140<br \/>\nc. 180<br \/>\nd. 220<\/p>\n<p>Answer: 140<\/p>\n<p>Explanation:<br \/>\nHannah has a grid of squares that has 12 rows with 15 squares in each row = 12 \u00d7 15 = 180.<br \/>\nShe colors 5 rows of 8 squares in the middle of the grid blue.<br \/>\nThe grid of squares in blue = 5 \u00d7 8 = 40.<br \/>\nThe grid of squares in red = 180 \u2013 40 = 140.<br \/>\nThe correct answer is option b.<\/p>\n<p>Question 5.<br \/>\nGabriella has 4 times as many erasers a Leona. Leona has 8 erasers. How many erasers does Gabriella have?<br \/>\nOptions:<br \/>\na. 32<br \/>\nb. 24<br \/>\nc. 12<br \/>\nd. 2<\/p>\n<p>Answer: 32<\/p>\n<p>Explanation:<br \/>\nGiven,<br \/>\nGabriella has 4 times as many erasers a Leona.<br \/>\nLeona has 8 erasers.<br \/>\nGabriella have 4 x 8 = 32 erasers.<br \/>\nThe correct answer is option a.<\/p>\n<p>Question 6.<br \/>\nPhil has 3 times as many rocks as Peter. Together, they have 48 rocks. How many more rocks does Phil have than Peter?<br \/>\nOptions:<br \/>\na. 36<br \/>\nb. 24<br \/>\nc. 16<br \/>\nd. 12<\/p>\n<p>Answer: 24<\/p>\n<p>Explanation:<br \/>\nPhil has 3 times as many rocks as Peter. Together, they have 48 rocks<br \/>\nIf Peter has x rocks, Phil has 3x rocks<br \/>\n3x + x = 48.<br \/>\n4x = 48.<br \/>\nx = 48\/4 = 12.<br \/>\nPeter has 12 rocks. Phil has 3 \u00d7 12 = 36 rocks.<br \/>\nPhil has 36 \u2013 12 = 24 more rocks than Peter.<br \/>\nThe correct answer is option b.<\/p>\n<h3><a id=\"Common_Core_Multiply_2_Digit_Numbers_Page_No_61\"><\/a>Common Core &#8211; Multiply 2-Digit Numbers &#8211; Page No. 61<\/h3>\n<p><strong>Choose a Multiplication Method<\/strong><\/p>\n<p><strong>Estimate. Then choose a method to find the product.<\/strong><\/p>\n<p>Question 1.<br \/>\nEstimate: <span style=\"text-decoration: underline;\">1,200<\/span><br \/>\n3 1<br \/>\n\u00d7 4 3<br \/>\n&#8212;&#8212;-<br \/>\n9 3<br \/>\n+ 1, 2 4 0<br \/>\n&#8212;&#8212;&#8212;&#8211;<br \/>\n1, 3 3 3<\/p>\n<p>Question 2.<br \/>\n6 7<br \/>\n\u00d7 8 5<br \/>\n&#8212;&#8212;&#8212;-<br \/>\nEstimate: _________<br \/>\nProduct: _________<\/p>\n<p>Answer:<br \/>\nEstimate: 6,300<br \/>\nProduct: 5,695<\/p>\n<p>Explanation:<br \/>\nEstimate: 67 is close to 70; 85 is close to 90.<br \/>\n70 \u00d7 90 = 6,300.<br \/>\nProduct: 67 \u00d7 85<br \/>\n80 \u00d7 6 tens = 480 tens<br \/>\n80 \u00d7 7 ones = 560 ones<br \/>\n5 \u00d7 6 tens = 30 tens<br \/>\n5 \u00d7 7 ones = 35 ones.<br \/>\nAdd partial products.<br \/>\n4800 + 560 + 300 + 35 = 5,695.<\/p>\n<p>Question 3.<br \/>\n6 8<br \/>\n\u00d7 3 8<br \/>\n&#8212;&#8212;&#8212;-<br \/>\nEstimate: _________<br \/>\nProduct: _________<\/p>\n<p>Answer:<br \/>\nEstimate: 2,800<br \/>\nProduct: 2,584<\/p>\n<p>Explanation:<br \/>\nEstimate: 68 is close to 70; 38 is close to 40.<br \/>\n70 \u00d7 40 = 2,800.<br \/>\nProduct: 68 \u00d7 38<br \/>\n30 \u00d7 6 tens = 180 tens<br \/>\n30 \u00d7 8 ones = 240 ones<br \/>\n8 \u00d7 6 tens = 48 tens<br \/>\n8 \u00d7 8 ones = 64 ones.<br \/>\nAdd partial products.<br \/>\n1800 + 240 + 480 + 64 = 2,584.<\/p>\n<p>Question 4.<br \/>\n9 5<br \/>\n\u00d7 1 7<br \/>\n&#8212;&#8212;&#8212;-<br \/>\nEstimate: _________<br \/>\nProduct: _________<\/p>\n<p>Answer:<br \/>\nEstimate: 1,700<br \/>\nProduct: 1,615<\/p>\n<p>Explanation:<br \/>\nEstimate: 95 is close to 100.<br \/>\n100 \u00d7 17 = 1,700.<br \/>\nProduct: 95 \u00d7 17<br \/>\n10 \u00d7 9 tens = 90 tens<br \/>\n10 \u00d7 5 ones = 50 ones<br \/>\n7 \u00d7 9 tens = 63 tens<br \/>\n7 \u00d7 5 ones = 35 ones.<br \/>\nAdd partial products.<br \/>\n900 + 50 + 630 + 35 = 1,615.<\/p>\n<p>Question 5.<br \/>\n4 9<br \/>\n\u00d7 5 4<br \/>\n&#8212;&#8212;&#8212;-<br \/>\nEstimate: _________<br \/>\nProduct: _________<\/p>\n<p>Answer:<br \/>\nEstimate: 2,500<br \/>\nProduct: 2,646<\/p>\n<p>Explanation:<br \/>\nEstimate: 49 is close to 50; 54 is close to 50.<br \/>\n50 \u00d7 50 = 2,500.<br \/>\nProduct: 49 \u00d7 54<br \/>\n50 \u00d7 4 tens = 200 tens<br \/>\n50 \u00d7 9 ones = 450 ones<br \/>\n4 \u00d7 4 tens = 16 tens<br \/>\n4 \u00d7 9 ones = 36 ones.<br \/>\nAdd partial products.<br \/>\n2000 + 450 + 160 + 36 = 2,646.<\/p>\n<p>Question 6.<br \/>\n9 1<br \/>\n\u00d7 2 6<br \/>\n&#8212;&#8212;&#8212;-<br \/>\nEstimate: _________<br \/>\nProduct: _________<\/p>\n<p>Answer:<br \/>\nEstimate: 2,700<br \/>\nProduct: 2,366<\/p>\n<p>Explanation:<br \/>\nEstimate: 91 is close to 90; 26 is close to 30.<br \/>\n90 \u00d7 30 = 2,700.<br \/>\nProduct: 49 \u00d7 54<br \/>\n20 \u00d7 9 tens = 180 tens<br \/>\n20 \u00d7 1 ones = 20 ones<br \/>\n6 \u00d7 9 tens = 54 tens<br \/>\n6 \u00d7 1 ones = 6 ones.<br \/>\nAdd partial products.<br \/>\n1800 + 20 + 540 + 6 = 2,366.<\/p>\n<p>Question 7.<br \/>\n8 2<br \/>\n\u00d7 1 9<br \/>\n&#8212;&#8212;&#8212;-<br \/>\nEstimate: _________<br \/>\nProduct: _________<\/p>\n<p>Answer:<br \/>\nEstimate: 1,600<br \/>\nProduct: 1,558<\/p>\n<p>Explanation:<br \/>\nEstimate: 82 is close to 80; 19 is close to 20.<br \/>\n80 \u00d7 20 = 1,600.<br \/>\nProduct: 82 \u00d7 19<br \/>\n10 \u00d7 8 tens = 80 tens<br \/>\n10 \u00d7 2 ones = 20 ones<br \/>\n9 \u00d7 8 tens = 72 tens<br \/>\n9 \u00d7 2 ones = 18 ones.<br \/>\nAdd partial products.<br \/>\n800 + 20 + 720 + 18 = 1,558.<\/p>\n<p>Question 8.<br \/>\n4 6<br \/>\n\u00d7 2 7<br \/>\n&#8212;&#8212;&#8212;-<br \/>\nEstimate: _________<br \/>\nProduct: _________<\/p>\n<p>Answer:<br \/>\nEstimate: 1,500<br \/>\nProduct: 1,242<\/p>\n<p>Explanation:<br \/>\nEstimate: 46 is close to 50; 27 is close to 30.<br \/>\n50 \u00d7 30 = 1,500.<br \/>\nProduct: 46 \u00d7 27<br \/>\n20 \u00d7 4 tens = 80 tens<br \/>\n20 \u00d7 6 ones = 120 ones<br \/>\n7 \u00d7 4 tens = 28 tens<br \/>\n7 \u00d7 6 ones = 42 ones.<br \/>\nAdd partial products.<br \/>\n800 + 120 + 280 + 42 = 1,242.<\/p>\n<p>Question 9.<br \/>\n4 1<br \/>\n\u00d7 3 3<br \/>\n&#8212;&#8212;&#8212;-<br \/>\nEstimate: _________<br \/>\nProduct: _________<\/p>\n<p>Answer:<br \/>\nEstimate: 1,200<br \/>\nProduct: 1,353<\/p>\n<p>Explanation:<br \/>\nEstimate: 41 is close to 40; 33 is close to 30.<br \/>\n40 \u00d7 30 = 1,200.<br \/>\nProduct: 41 \u00d7 33<br \/>\n30 \u00d7 4 tens = 120 tens<br \/>\n30 \u00d7 1 ones = 30 ones<br \/>\n3 \u00d7 4 tens = 12 tens<br \/>\n3 \u00d7 1 ones = 3 ones.<br \/>\nAdd partial products.<br \/>\n1200 + 30 + 120 + 3 = 1,353.<\/p>\n<p>Question 10.<br \/>\n9 7<br \/>\n\u00d7 1 3<br \/>\n&#8212;&#8212;&#8212;-<br \/>\nEstimate: _________<br \/>\nProduct: _________<\/p>\n<p>Answer:<br \/>\nEstimate: 1,300<br \/>\nProduct: 1,261<\/p>\n<p>Explanation:<br \/>\nEstimate: 97 is close to 100.<br \/>\n100 \u00d7 13 = 1,300.<br \/>\nProduct: 97 \u00d7 13<br \/>\n10 \u00d7 9 tens = 90 tens<br \/>\n10 \u00d7 7 ones = 70 ones<br \/>\n3 \u00d7 9 tens = 27 tens<br \/>\n3 \u00d7 7 ones = 21 ones.<br \/>\nAdd partial products.<br \/>\n900 + 70 + 270 + 21 = 1,261.<\/p>\n<p>Question 11.<br \/>\n7 5<br \/>\n\u00d7 6 9<br \/>\n&#8212;&#8212;&#8212;-<br \/>\nEstimate: _________<br \/>\nProduct: _________<\/p>\n<p>Answer:<br \/>\nEstimate: 5,600<br \/>\nProduct: 5,195<\/p>\n<p>Explanation:<br \/>\nEstimate: 75 is close to 80; 69 is close to 70.<br \/>\n80 \u00d7 70 = 5,600.<br \/>\nProduct: 75 \u00d7 69<br \/>\n60 \u00d7 7 tens = 420 tens<br \/>\n60 \u00d7 5 ones = 300 ones<br \/>\n9 \u00d7 7 tens = 63 tens<br \/>\n9 \u00d7 5 ones = 45 ones.<br \/>\nAdd partial products.<br \/>\n4200 + 300 + 630 + 45 = 5,195.<\/p>\n<p><em><strong>Problem Solving<\/strong><\/em><\/p>\n<p>Question 12.<br \/>\nA movie theatre has 26 rows of seats. There are 18 seats in each row. How many seats are there in all?<br \/>\n_____ seats<\/p>\n<p>Answer: 468 seats<\/p>\n<p>Explanation:<br \/>\nGiven,<br \/>\nA movie theatre has 26 rows of seats.<br \/>\nThere are 18 seats in each row.<br \/>\n26 x 18 = 468 seats.<br \/>\n20 x 18 = 360<br \/>\n6 x 18 = 108<br \/>\n108+360 = 468.<br \/>\nTherefore there are 468 seats in all.<\/p>\n<p>Question 13.<br \/>\nEach class at Briarwood Elementary collected at least 54 cans of food during the food drive. If there are 29 classes in the school, what was the least number of<br \/>\ncans collected?<br \/>\n_____ cans<\/p>\n<p>Answer: 1,566 cans<\/p>\n<p>Explanation:<br \/>\nEach class at Briarwood Elementary collected at least 54 cans of food.<br \/>\nIf there are 29 classes in the school,<br \/>\nthe least number of cans collected = 54 x 29 = 1,566 cans.<\/p>\n<h3><a id=\"Common_Core_Multiply_2_Digit_Numbers_Page_No_62\"><\/a>Common Core &#8211; Multiply 2-Digit Numbers &#8211; Page No. 62<\/h3>\n<p><em><strong>Lesson Check<\/strong><\/em><\/p>\n<p>Question 1.<br \/>\nA choir needs new robes for each of its 46 singers. Each robe costs $32. What will be the total cost for all 46 robes?<br \/>\nOptions:<br \/>\na. $1,472<br \/>\nb. $1,372<br \/>\nc. $1,362<br \/>\nd. $230<\/p>\n<p>Answer: $1,472<\/p>\n<p>Explanation:<br \/>\nGiven,<br \/>\nA choir needs new robes for each of its 46 singers. Each robe costs $32.<br \/>\n46 \u00d7 $32<br \/>\n40 \u00d7 $32 = $1,280<br \/>\n6 \u00d7 $32 = $192<br \/>\n$1,280 + $192 = $1,472<br \/>\nThe correct answer is option a.<\/p>\n<p>Question 2.<br \/>\nA wall on the side of a building is made up of 52 rows of bricks with 44 bricks in each row. How many bricks make up the wall?<br \/>\nOptions:<br \/>\na. 3,080<br \/>\nb. 2,288<br \/>\nc. 488<br \/>\nd. 416<\/p>\n<p>Answer: 2,288<\/p>\n<p>Explanation:<br \/>\nGiven,<br \/>\nA wall on the side of a building is made up of 52 rows of bricks with 44 bricks in each row.<br \/>\n52 \u00d7 44<br \/>\n50 \u00d7 44 = 2,200<br \/>\n2 \u00d7 44 = 88<br \/>\n2,200 + 88 = 2,288.<br \/>\n2,288 bricks make up the wall.<br \/>\nThe correct answer is option b.<\/p>\n<p><em><strong>Spiral Review<\/strong><\/em><\/p>\n<p>Question 3.<br \/>\nWhich expression shows how to multiply 4 \u00d7 362 by using place value and expanded form?<br \/>\nOptions:<br \/>\na. (4 \u00d7 3) + (4 \u00d7 6) + (4 \u00d7 2)<br \/>\nb. (4 \u00d7 300) + (4 \u00d7 600) +(4 \u00d7 200)<br \/>\nc. (4 \u00d7 300) + (4 \u00d7 60) + (4 \u00d7 20)<br \/>\nd. (4 \u00d7 300) + (4 \u00d7 60) + (4 \u00d7 2)<\/p>\n<p>Answer: (4 \u00d7 300) + (4 \u00d7 60) + (4 \u00d7 2)<\/p>\n<p>Explanation:<br \/>\n4 \u00d7 362 = 1,448<br \/>\na. (4 \u00d7 3) + (4 \u00d7 6) + (4 \u00d7 2) = 12 + 24 + 8 = 44 not equal to 1,448.<br \/>\nb. (4 \u00d7 300) + (4 \u00d7 600) +(4 \u00d7 200) = 1200 + 2400 + 800 = 4,400 not equal to 1,448.<br \/>\nc. (4 \u00d7 300) + (4 \u00d7 60) + (4 \u00d7 20) = 1200 + 240 + 80 = 1,520 not equal to 1,448.<br \/>\nd. (4 \u00d7 300) + (4 \u00d7 60) + (4 \u00d7 2) = 1200 + 240 + 8 = 1,448 equal to 1,448.<br \/>\nThe correct answer is option d.<\/p>\n<p>Question 4.<br \/>\nUse the model below. What is the product 4 \u00d7 492?<br \/>\n<img loading=\"lazy\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2020\/07\/Go-Math-Grade-4-Answer-Key-Homework-Practice-FL-Chapter-3-Multiply-2-Digit-Numbers-img-7.jpg\" alt=\"Go Math Grade 4 Answer Key Homework Practice FL Chapter 3 Multiply 2-Digit Numbers Common Core - Multiply 2-Digit Numbers img 7\" width=\"276\" height=\"116\" \/><br \/>\nOptions:<br \/>\na. 16 + 36 + 8 = 60<br \/>\nb. 160 + 36 + 8 = 204<br \/>\nc. 160 + 360 + 8 = 528<br \/>\nd. 1,600 + 360 + 8 = 1,968<\/p>\n<p>Answer: 1,600 + 360 + 8 = 1,968<\/p>\n<p><img src=\"https:\/\/i2.wp.com\/gomathanswerkey.com\/wp-content\/uploads\/2020\/07\/Grade-4-Chapter-3-Common-Core-182.png?resize=300%2C139&amp;ssl=1\" alt=\"Grade 4 Chapter 3 Common Core 182\" \/><\/p>\n<p>1,600 + 360 + 8 = 1,968<br \/>\nThe correct answer is option d.<\/p>\n<p>Question 5.<br \/>\nWhat is the sum 13,094 + 259,728?<br \/>\nOptions:<br \/>\na. 272,832<br \/>\nb. 272,822<br \/>\nc. 262,722<br \/>\nd. 262,712<\/p>\n<p>Answer: 262,722<\/p>\n<p>Explanation:<br \/>\n13,094 + 259,728 = 262,722<br \/>\nThe correct answer is option c.<\/p>\n<p>Question 6.<br \/>\nDuring the 2008\u20132009 season, there were 801,372 people who attended the home hockey games in Philadelphia. There were 609,907 people who attended the home hockey games in Phoenix. How much greater was the home attendance in Philadelphia than in Phoenix that season?<br \/>\nOptions:<br \/>\na. 101,475<br \/>\nb. 191,465<br \/>\nc. 201,465<br \/>\nd. 202,465<\/p>\n<p>Answer: 191,465<\/p>\n<p>Explanation:<br \/>\nGiven,<br \/>\nDuring the 2008\u20132009 season, there were 801,372 people who attended the home hockey games in Philadelphia.<br \/>\nThere were 609,907 people who attended the home hockey games in Phoenix.<br \/>\n801,372 \u2013 609,907 = 191,465<br \/>\nPhiladelphia attendance is 191,465 greater than in Phoenix that season.<br \/>\nThe correct answer is option b.<\/p>\n<h3><a id=\"Common_Core_Multiply_2_Digit_Numbers_Page_No_63\"><\/a>Common Core &#8211; Multiply 2-Digit Numbers &#8211; Page No. 63<\/h3>\n<p><strong>Problem Solving Multiply 2 &#8211; Digit numbers<\/strong><\/p>\n<p><strong>Solve each problem. Use a bar model to help.<\/strong><\/p>\n<p>Question 1.<br \/>\nMason counted an average of 18 birds at his bird feeder each day for 20 days. Gloria counted an average of 21 birds at her bird feeder each day for 16 days. How many more birds did Mason count at his feeder than Gloria counted at hers?<br \/>\n<img loading=\"lazy\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2020\/07\/Go-Math-Grade-4-Answer-Key-Homework-Practice-FL-Chapter-3-Multiply-2-Digit-Numbers-img-8.jpg\" alt=\"Go Math Grade 4 Answer Key Homework Practice FL Chapter 3 Multiply 2-Digit Numbers Common Core - Multiply 2-Digit Numbers img 8\" width=\"307\" height=\"150\" \/><br \/>\nBirds counted by Mason: 18 \u00d7 20 = 360<br \/>\nBirds counted by Gloria: 21 \u00d7 16 = 336<br \/>\nDraw a bar model to compare.<br \/>\nSubtract. 360 &#8211; 336 = 24<br \/>\nSo, Mason counted <span style=\"text-decoration: underline;\">24<\/span> more birds.<\/p>\n<p>Question 2.<br \/>\nThe 24 students in Ms. Lee\u2019s class each collected an average of 18 cans for recycling. The 21 students in Mr. Galvez\u2019s class each collected an average of 25 cans for recycling. How many more cans were collected by Mr. Galvez\u2019s class than Ms. Lee\u2019s class?<br \/>\n_____ more cans<\/p>\n<p>Answer: 93 more cans<\/p>\n<p>Explanation:<br \/>\nThe number of cans collected by Ms. Lee\u2019s class = 18 \u00d7 24 = 432.<br \/>\nThe number of cans collected by Mr. Galvez\u2019s class = 25 \u00d7 21 = 525.<br \/>\nUse Bar Model<br \/>\n<img src=\"https:\/\/i1.wp.com\/gomathanswerkey.com\/wp-content\/uploads\/2020\/07\/Grade-4-Chapter-3-Common-Core-187.png?resize=300%2C150&amp;ssl=1\" alt=\"Grade 4 Chapter 3 Common Core 187\" \/><\/p>\n<p>Subtract. 525 \u2013 432 = 93 more cans.<br \/>\nSo, Mr. Galvez\u2019s class collected 93 more cans than Ms. Lee\u2019s class.<\/p>\n<p>Question 3.<br \/>\nAt East School, each of the 45 classrooms has an average of 22 students. At West School, each of the 42 classrooms has an average of 23 students. How many more students are at East School than at West School?<br \/>\n_____ more students<\/p>\n<p>Answer: 24 more students<\/p>\n<p>Explanation:<br \/>\nStudents in East school = 45 \u00d7 22 = 990.<br \/>\nStudents in West School = 42 \u00d7 23 = 966.<br \/>\nUse Bar Model<br \/>\n<img src=\"https:\/\/i2.wp.com\/gomathanswerkey.com\/wp-content\/uploads\/2020\/07\/Grade-4-Chapter-3-Common-Core-image-2-187.png?resize=300%2C133&amp;ssl=1\" alt=\"Grade 4 Chapter 3 Common Core image 2 187\" \/><\/p>\n<p>Subtract. 990 \u2013 966 = 24.<br \/>\nSo, East School has 24 students more than West School.<\/p>\n<p>Question 4.<br \/>\nA zoo gift shop orders 18 boxes of 75 key rings each and 15 boxes of 80 refrigerator magnets each. How many more key rings than refrigerator magnets does the gift shop order?<br \/>\n_____ more key rings<\/p>\n<p>Answer: 150 more key rings<\/p>\n<p>Explanation:<br \/>\nNumber of Key Rings = 75 x 18 = 1,350.<br \/>\nNumber of Refrigerator Magnets= 80 x 15 = 1,200.<br \/>\nUse Bar Model<br \/>\n<img src=\"https:\/\/i2.wp.com\/gomathanswerkey.com\/wp-content\/uploads\/2020\/07\/Grade-4-Chapter-3-Common-Core-image-3-187.png?resize=300%2C142&amp;ssl=1\" alt=\"Grade 4 Chapter 3 Common Core image 3 187\" \/><br \/>\nSubtract. 1,350 \u2013 1,200 = 150.<br \/>\nSo, key rings are 150 more than refrigerator magnets.<\/p>\n<h3><a id=\"Common_Core_Multiply_2_Digit_Numbers_Page_No_64\"><\/a>Common Core &#8211; Multiply 2-Digit Numbers &#8211; Page No. 64<\/h3>\n<p><em><strong>Lesson Check<\/strong><\/em><\/p>\n<p>Question 1.<br \/>\nAce Manufacturing ordered 17 boxes with 85 ball bearings each. They also ordered 15 boxes with 90 springs each. How many more ball bearings than springs did they order?<br \/>\nOptions:<br \/>\na. 5<br \/>\nb. 85<br \/>\nc. 90<br \/>\nd. 95<\/p>\n<p>Answer: 95<\/p>\n<p>Explanation:<br \/>\nNumber of ball bearings = 85 \u00d7 17 = 1,445.<br \/>\nNumber of springs = 90 \u00d7 15 = 1,350.<br \/>\nUse Bar Model<br \/>\n<img src=\"https:\/\/i1.wp.com\/gomathanswerkey.com\/wp-content\/uploads\/2020\/07\/Grade-4-Chapter-3-Common-Core-image-1-188.png?resize=300%2C138&amp;ssl=1\" alt=\"Grade 4 Chapter 3 Common Core image 1 188\" \/><\/p>\n<p>Subtract. 1,445 \u2013 1,350 = 95.<br \/>\nSo, ball bearings are 95 more than springs.<br \/>\nThe correct answer is option d.<\/p>\n<p>Question 2.<br \/>\nElton hiked 16 miles each day on a 12-day hiking trip. Lola hiked 14 miles each day on her 16-day hiking trip. In all, how many more miles did Lola hike than Elton hiked?<br \/>\nOptions:<br \/>\na. 2 miles<br \/>\nb. 18 miles<br \/>\nc. 32 miles<br \/>\nd. 118 miles<\/p>\n<p>Answer: 32 miles<\/p>\n<p>Explanation:<br \/>\nHiking trip by Elton = 12 \u00d7 16 = 192.<br \/>\nHiking trip by Lola = 16 \u00d7 14 = 224.<br \/>\nUse Bar Model<br \/>\n<img src=\"https:\/\/i0.wp.com\/gomathanswerkey.com\/wp-content\/uploads\/2020\/07\/Grade-4-Chapter-3-Common-Core-image-2-188.png?resize=300%2C147&amp;ssl=1\" alt=\"Grade 4 Chapter 3 Common Core image 2 188\" \/><\/p>\n<p>Subtract. 224 \u2013 192 = 32.<br \/>\nSo, the Hiking trip by Lola is 32 times more than the Hiking trip by Elton.<br \/>\nThe correct answer is option c.<\/p>\n<p><em><strong>Spiral Review<\/strong><\/em><\/p>\n<p>Question 3.<br \/>\nAn orchard has 24 rows of apple trees. There are 35 apple trees in each row. How many apple trees are in the orchard?<br \/>\nOptions:<br \/>\na. 59<br \/>\nb. 192<br \/>\nc. 740<br \/>\nd. 840<\/p>\n<p>Answer: 840<\/p>\n<p>Explanation:<br \/>\nAn orchard has 24 rows of apple trees. There are 35 apple trees in each row.<br \/>\n24 \u00d7 35 = 840 apple trees are in the orchard.<br \/>\nThe correct answer is option d.<\/p>\n<p>Question 4.<br \/>\nAn amusement park reported 354,605 visitors last summer. What is this number rounded to the nearest thousand?<br \/>\nOptions:<br \/>\na. 354,600<br \/>\nb. 355,000<br \/>\nc. 360,000<br \/>\nd. 400,000<\/p>\n<p>Answer: 355,000<\/p>\n<p>Explanation:<br \/>\nAn amusement park reported 354,605 visitors last summer. 4,605 is close to 5,000.<br \/>\nSo, the answer is 355,000.<br \/>\nThe correct answer is option b.<\/p>\n<p>Question 5.<br \/>\nAttendance at the football game was 102,653. What is the value of the digit 6?<br \/>\nOptions:<br \/>\na. 6<br \/>\nb. 60<br \/>\nc. 600<br \/>\nd. 6,000<\/p>\n<p>Answer: 600<\/p>\n<p>Explanation:<br \/>\nDigit 6 is at hundreds of positions.<br \/>\nSo, the answer is 6 x 100 = 600.<br \/>\nThe correct answer is option c.<\/p>\n<p>Question 6.<br \/>\nJill\u2019s fish weighs 8 times as much as her parakeet. Together, the pets weigh 63 ounces. How much does the fish weigh?<br \/>\nOptions:<br \/>\na. 7 ounces<br \/>\nb. 49 ounces<br \/>\nc. 55 ounces<br \/>\nd. 56 ounces<\/p>\n<p>Answer: 56 ounces<\/p>\n<p>Explanation:<br \/>\nLet Jill\u2019s parakeet = X.<br \/>\nJill\u2019s fish weighs 8 times as much as her parakeet = 8X.<br \/>\nTogether, the pets weigh 63 ounces.<br \/>\nX + 8X = 63.<br \/>\n9X = 63.<br \/>\nX = 63\/9 = 7.<br \/>\nSo, Jill\u2019s parakeet =7.<br \/>\nJill\u2019s fish = 7 \u00d7 8 = 56 ounces.<br \/>\nThe correct answer is option d.<\/p>\n<h3><a id=\"Common_Core_Multiply_2_Digit_Numbers_Page_No_65\"><\/a>Common Core &#8211; Multiply 2-Digit Numbers &#8211; Page No. 65<\/h3>\n<p><em><strong>Lesson 3.1<\/strong><\/em><\/p>\n<p><strong>Choose a method. Then find the product.<\/strong><\/p>\n<p>Question 1.<br \/>\n12 \u00d7 60 = _____<\/p>\n<p>Answer: 720<\/p>\n<p>Explanation:<br \/>\nBy using the place value method<br \/>\nYou can take 10 as 1 ten<br \/>\n12 \u00d7 60 = 12 \u00d7 6 ten<br \/>\n= 72 ten<br \/>\n12 \u00d7 60 = 720<\/p>\n<p>Question 2.<br \/>\n56 \u00d7 40 = _____<\/p>\n<p>Answer: 2240<\/p>\n<p>Explanation:<br \/>\n56 \u00d7 40<br \/>\nBy using the associative property<br \/>\nYou can think of 40 as (4 \u00d7 10)<br \/>\n56 \u00d7 40 = 56 \u00d7 (4 \u00d7 10)<br \/>\n= (56 \u00d7 4) \u00d7 10<br \/>\n= 224 \u00d7 10<br \/>\n56 \u00d7 40 = 2240<\/p>\n<p>Question 3.<br \/>\n30 \u00d7 40 = _____<\/p>\n<p>Answer: 1200<\/p>\n<p>Explanation:<br \/>\n30 \u00d7 40<br \/>\nBy using the place value method<br \/>\nYou can take 30 as 3 tens<br \/>\n30 \u00d7 40 = 30 \u00d7 4 tens<br \/>\n= 120 tens<br \/>\n30 \u00d7 40 = 1200<\/p>\n<p>Question 4.<br \/>\n50 \u00d7 67 = _____<\/p>\n<p>Answer: 3350<\/p>\n<p>Explanation:<br \/>\nBy using the place value method<br \/>\nYou can take 50 as 5 tens<br \/>\n50 x 67 = 67 x 5 tens<br \/>\n= 335 tens<br \/>\n50 \u00d7 67 = 3350<\/p>\n<p><em><strong>Lesson 3.2<\/strong><\/em><\/p>\n<p><strong>Estimate the product. Choose a method.<\/strong><\/p>\n<p>Question 5.<br \/>\n33 \u00d7 76 = _____<\/p>\n<p>Answer: 2400<\/p>\n<p>Round to the nearest tens.<br \/>\n33 is close to 30; 76 is close to 80;<br \/>\nUse the mental math<br \/>\n30 \u00d7 80\u00a0 = 2400<br \/>\nSo, estimated product of 33 \u00d7 76 = 2400<\/p>\n<p>Question 6.<br \/>\n43 \u00d7 90 = _____<\/p>\n<p>Answer: 3600<\/p>\n<p>Explanation:<br \/>\nRound to the nearest tens.<br \/>\n43 is close to 40; 90 is close to 90;<br \/>\nUse the mental math, then<br \/>\n9 \u00d7 4 = 36<br \/>\n90 \u00d7 40 = 3,600<br \/>\nSo, estimated product of 43 \u00d7 90 = 3,600<\/p>\n<p>Question 7.<br \/>\n47 \u00d7 $ 66 = _____<\/p>\n<p>Answer: $3500<\/p>\n<p>Explanation:<br \/>\nRound to the nearest tens.<br \/>\n47 is close to 50; 66 is close to 70;<br \/>\nUse the mental math, then<br \/>\n50 \u00d7 70 = 3,500<br \/>\nSo, estimated product of 50 \u00d7 70 = $3,500<\/p>\n<p>Question 8.<br \/>\n12 \u00d7 81 = _____<\/p>\n<p>Answer: 800<\/p>\n<p>Explanation:<br \/>\nRound to the nearest tens.<br \/>\n12 is close to 10; 81 is close to 80;<br \/>\nUse mental math, then<br \/>\n10 \u00d7 80 = 800<br \/>\nSo, the estimated product of 12 \u00d7 81 = 800<\/p>\n<p>Question 9.<br \/>\n46 \u00d7 47 = _____<\/p>\n<p>Answer: 2500<\/p>\n<p>Explanation:<br \/>\nRound to the nearest tens.<br \/>\n46 is close to 50; 47 is close to 50;<br \/>\nUse mental math, then<br \/>\n50 \u00d7 50 = 2500<br \/>\nSo, the estimated product of 46 \u00d7 47 = 2500<\/p>\n<p>Question 10.<br \/>\n58 \u00d7 79 = _____<\/p>\n<p>Answer: 4800<\/p>\n<p>Explanation:<br \/>\nRound to the nearest tens.<br \/>\n58 is close to 60; 79 is close to 80;<br \/>\nUse mental math, then<br \/>\n60 \u00d7 80 = 4800<br \/>\nSo, the estimated product of 58 \u00d7 79 = 4800<\/p>\n<p>Question 11.<br \/>\n24 \u00d7 73 = _____<\/p>\n<p>Answer: 1400<\/p>\n<p>Explanation:<br \/>\nRound to the nearest tens.<br \/>\n24 is close to 20; 73 is close to 70;<br \/>\nUse mental math, then<br \/>\n20 \u00d7 70 = 1400<br \/>\nSo, the estimated product of 24 \u00d7 73 = 1400<\/p>\n<p>Question 12.<br \/>\n68 \u00d7 36 = _____<\/p>\n<p>Answer: 2800<\/p>\n<p>Explanation:<br \/>\nRound to the nearest tens.<br \/>\n68 is close to 70; 36 is close to 40;<br \/>\nUse mental math, then<br \/>\n70 \u00d7 40 = 2800<br \/>\nSo, the estimated product of 68 \u00d7 36 = 2800<\/p>\n<p><em><strong>Lesson 3.3<\/strong><\/em><\/p>\n<p><strong>Draw a model to represent the product.<\/strong><br \/>\n<strong>Then record the product.<\/strong><\/p>\n<p>Question 13.<br \/>\n41 \u00d7 16 = _____<\/p>\n<p>Answer: 656<\/p>\n<p>Explanation:<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-8078\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2020\/07\/Chapter-3-Common-core-image-2-1.jpg\" alt=\"Chapter-3-Common-core-image-2-1\" width=\"185\" height=\"143\" \/><br \/>\n400 + 240 + 10 + 6 = 656<\/p>\n<p>Question 14.<br \/>\n39 \u00d7 52 = _____<\/p>\n<p>Answer: 2028<\/p>\n<p>Explanation:<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-8079\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2020\/07\/Chapter-3-Common-core-image-2-2.jpg\" alt=\"Chapter-3-Common-core-image-2-2\" width=\"179\" height=\"143\" \/><br \/>\n1500 + 60 + 450 + 18 = 2028<\/p>\n<p>Question 15.<br \/>\n94 \u00d7 36 = _____<\/p>\n<p>Answer: 3384<\/p>\n<p>Explanation:<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-8080\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2020\/07\/Chapter-3-Common-core-image-2-3.jpg\" alt=\"Chapter-3-Common-core-image-2-3\" width=\"179\" height=\"143\" \/><br \/>\n2700 + 540 + 120 + 24 = 3384<\/p>\n<h3><a id=\"Common_Core_Multiply_2_Digit_Numbers_Page_No_66\"><\/a>Common Core &#8211; Multiply 2-Digit Numbers &#8211; Page No. 66<\/h3>\n<p><em><strong>Lesson 3.4<\/strong><\/em><\/p>\n<p><strong>Record the product.<\/strong><\/p>\n<p>Question 1.<br \/>\n5 3<br \/>\n\u00d7 3 7<br \/>\n&#8212;&#8212;&#8212;<br \/>\n________<\/p>\n<p>Answer: 1961<\/p>\n<p><img loading=\"lazy\" class=\"alignnone size-medium wp-image-8081\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2020\/07\/Go-Math-Grade-4-Chapter-3-img-3-1-241x300.jpg\" alt=\"Go Math Grade 4 Chapter 3 img 3-1\" width=\"241\" height=\"300\" srcset=\"https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2020\/07\/Go-Math-Grade-4-Chapter-3-img-3-1-241x300.jpg 241w, https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2020\/07\/Go-Math-Grade-4-Chapter-3-img-3-1.jpg 668w\" sizes=\"(max-width: 241px) 100vw, 241px\" \/><\/p>\n<p>Question 2.<br \/>\n4 8<br \/>\n\u00d7 47<br \/>\n&#8212;&#8212;&#8212;<br \/>\n________<\/p>\n<p>Answer: 2256<\/p>\n<p><img loading=\"lazy\" class=\"alignnone size-medium wp-image-8082\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2020\/07\/Go-Math-Grade-4-Chapter-3-img-3-2-244x300.jpg\" alt=\"Go Math Grade 4 Chapter 3 img 3-2\" width=\"244\" height=\"300\" srcset=\"https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2020\/07\/Go-Math-Grade-4-Chapter-3-img-3-2-244x300.jpg 244w, https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2020\/07\/Go-Math-Grade-4-Chapter-3-img-3-2-833x1024.jpg 833w, https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2020\/07\/Go-Math-Grade-4-Chapter-3-img-3-2-768x944.jpg 768w, https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2020\/07\/Go-Math-Grade-4-Chapter-3-img-3-2.jpg 875w\" sizes=\"(max-width: 244px) 100vw, 244px\" \/><\/p>\n<p>Question 3.<br \/>\n6 5<br \/>\n\u00d7 2 8<br \/>\n&#8212;&#8212;&#8212;<br \/>\n________<\/p>\n<p>Answer: 1820<\/p>\n<p><img loading=\"lazy\" class=\"alignnone size-medium wp-image-8083\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2020\/07\/Go-Math-Grade-4-Chapter-3-img-3-3-239x300.jpg\" alt=\"Go Math Grade 4 Chapter 3 img 3-3\" width=\"239\" height=\"300\" srcset=\"https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2020\/07\/Go-Math-Grade-4-Chapter-3-img-3-3-239x300.jpg 239w, https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2020\/07\/Go-Math-Grade-4-Chapter-3-img-3-3.jpg 744w\" sizes=\"(max-width: 239px) 100vw, 239px\" \/><\/p>\n<p>Question 4.<br \/>\n9 2<br \/>\n\u00d7 7 9<br \/>\n&#8212;&#8212;&#8212;<br \/>\n________<\/p>\n<p>Answer: 7268<\/p>\n<p><img loading=\"lazy\" class=\"alignnone size-medium wp-image-8084\" src=\"https:\/\/ccssmathanswers.com\/wp-content\/uploads\/2020\/07\/Go-Math-Grade-4-Chapter-3-img-3-4-245x300.jpg\" alt=\"Go Math Grade 4 Chapter 3 img 3-4\" width=\"245\" height=\"300\" srcset=\"https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2020\/07\/Go-Math-Grade-4-Chapter-3-img-3-4-245x300.jpg 245w, https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2020\/07\/Go-Math-Grade-4-Chapter-3-img-3-4-768x939.jpg 768w, https:\/\/bigideasmathanswers.com\/wp-content\/uploads\/2020\/07\/Go-Math-Grade-4-Chapter-3-img-3-4.jpg 808w\" sizes=\"(max-width: 245px) 100vw, 245px\" \/><\/p>\n<p><em><strong>Lessons 3.5\u20133.6<\/strong><\/em><\/p>\n<p><strong>Estimate. Then choose a method to find the product.<\/strong><\/p>\n<p>Question 5.<br \/>\n4 8<br \/>\n\u00d7 2 1<br \/>\n&#8212;&#8212;&#8212;<br \/>\nEstimate: ________<br \/>\nProduct: ________<\/p>\n<p>Answer:<\/p>\n<p>Explanation:<br \/>\n48 \u00d7 21<br \/>\nEstimate: Think 48 is close to 50; 21 is close to 20.<br \/>\n50 x 20 = 1000<br \/>\nProduct:<br \/>\n10 x 5 tens = 50 tens<br \/>\n50 x 2 ones = 100 ones<br \/>\n2 x 2 tens = 40 tens<br \/>\n4 x 2 ones = 8 ones.<br \/>\nAdd partial products.<br \/>\n500 + 100 + 400 + 8 = 1008.<\/p>\n<p>Question 6.<br \/>\n$ 7 2<br \/>\n\u00d7 4 6<br \/>\n&#8212;&#8212;&#8212;<br \/>\nEstimate: ________<br \/>\nProduct: ________<\/p>\n<p>Answer: 3312<\/p>\n<p>Estimate: Think 72 is close to 70; 46 is close to 50.<br \/>\n70 \u00d7 50 = 3500<br \/>\nProduct:<br \/>\n70 x 4 tens = 280 tens<br \/>\n50 x 2 ones = 100 ones<br \/>\n4 x 10 tens = 40 tens<br \/>\n4 x 6 ones = 24 ones.<br \/>\nAdd partial products.<br \/>\n2800 + 100 + 400 + 12 = 3312<\/p>\n<p>Question 7.<br \/>\n$ 3 9<br \/>\n\u00d7 5 8<br \/>\n&#8212;&#8212;&#8212;<br \/>\nEstimate: ________<br \/>\nProduct: ________<\/p>\n<p>Answer: 2262<\/p>\n<p>Estimate: Think 39 is close to 40; 58 is close to 60.<br \/>\n40 \u00d7 60 = 2400<br \/>\nProduct:<br \/>\n30 x 5 tens = 150 tens<br \/>\n9 x 8 ones = 72 ones<br \/>\n8 x 3 tens = 24 tens<br \/>\n9 x 5 tens = 45 tens.<br \/>\nAdd partial products.<br \/>\n1500 + 240 + 450 + 72 = 2262<\/p>\n<p>Question 8.<br \/>\n27 \u00d7 $ 19<br \/>\nEstimate: ________<br \/>\nProduct: ________<\/p>\n<p>Answer: 513<\/p>\n<p>Estimate: Think 27 is close to 30; 19 is close to 20.<br \/>\n30 \u00d7 20 = 600<br \/>\nProduct:<br \/>\n20 x 9 ones = 180 ones<br \/>\n9 x 7 ones = 63 ones<br \/>\n20 x 1 tens = 20 tens<br \/>\n7 x 10 ones = 70 ones.<br \/>\nAdd partial products.<br \/>\n180 + 70 + 63 + 200 = 513<\/p>\n<p>Question 9.<br \/>\n97 \u00d7 32<br \/>\nEstimate: ________<br \/>\nProduct: ________<\/p>\n<p>Answer: 3104<\/p>\n<p>Estimate: Think 97 is close to 100; 32 is close to 30.<br \/>\n100 \u00d7 30 = 3000<br \/>\nProduct:<br \/>\n30 x 9 tens = 270 tens<br \/>\n30 x 7 ones = 210 ones<br \/>\n2 x 9 tens = 18 tens<br \/>\n2 x 7 ones = 14 ones.<br \/>\nAdd partial products.<br \/>\n2700 + 210 + 14 + 180 = 3104<\/p>\n<p>Question 10.<br \/>\n44 \u00d7 69<br \/>\nEstimate: ________<br \/>\nProduct: ________<\/p>\n<p>Answer: 3036<\/p>\n<p>Estimate: Think 44 is close to 40; 69 is close to 70.<br \/>\n100 \u00d7 30 = 3000<br \/>\nProduct:<br \/>\n40 x 6 tens = 240 tens<br \/>\n40 x 9 ones = 360 ones<br \/>\n4 x 6 tens = 24 tens<br \/>\n4 x 9 ones = 36 ones.<br \/>\nAdd partial products<br \/>\n2400 + 360 + 240 + 36 = 3036<\/p>\n<p>Question 11.<br \/>\nLast week, Ms. Simpson worked 28 hours. She stocked shelves for 45 minutes each hour for 14 of those hours. The rest of the time she worked in customer service. How many minutes last week did Ms. Simpson work in customer service? (Hint: 1 hour = 60 minutes)<br \/>\n______ minutes<\/p>\n<p>Answer: 1050 minutes<\/p>\n<p>Explanation:<br \/>\nGiven,<br \/>\nLast week, Ms. Simpson worked 28 hours.<br \/>\nShe stocked shelves for 45 minutes each hour for 14 of those hours.<br \/>\nThe rest of the time she worked in customer service.<br \/>\n45 \u00d7 14 = 630<br \/>\nShe worked 630 minutes stocking shelves, which equals 10 hours and 30 minutes.<br \/>\nAfter that, she worked another 17 hours and 30 minutes in customer service.<br \/>\n17 \u00d7 60 = 1020<br \/>\n1020 + 30 = 1050<br \/>\nMs. Simpson worked 1050 minutes in customer service.<\/p>\n<p>Question 12.<br \/>\nThe after-school craft center has 15 boxes of 64 crayons each. In 12 of the boxes, 28 of the crayons have not been used. All the rest have been used. How many of the crayons in the center have been used?<br \/>\n______ crayons<\/p>\n<p>Answer: 624 crayon<\/p>\n<p>Explanation:<br \/>\nIn 12 of the boxes, 28 crayons have not been used; this leaves 64-28=36 crayons that have been used. 12(36) = 432 crayons have been used in these boxes.<br \/>\n3 full boxes have been used; this is 3(64) = 192 crayons.<br \/>\nTogether this makes 432 + 192 = 624 crayons that have been used.<\/p>\n<h3><em>Conclusion:<\/em><\/h3>\n<p>I hope the answers provided in our Go Math Grade Chapter 3 Homework Practice FL Multiply 2-Digit Numbers are helpful for all the 4th standard students in scoring the marks in the exams. For more questions refer to Go Math Grade Chapter 3 Multiply 2-Digit Numbers pdf. All the Best Guys!!!!<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Parents are you searching for the best answer key resource to practice all the concepts of multiplication then here it is\u00a0Go Math Grade 4 Answer Key Homework Practice FL Chapter 3 Multiply 2-Digit Numbers. It aids your kid&#8217;s preparation and makes them grasp all the concepts clearly. 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