{"id":90082,"date":"2022-03-30T11:48:28","date_gmt":"2022-03-30T06:18:28","guid":{"rendered":"https:\/\/bigideasmathanswers.com\/?p=90082"},"modified":"2022-04-07T14:38:59","modified_gmt":"2022-04-07T09:08:59","slug":"envision-math-common-core-grade-4-answer-key-topic-2","status":"publish","type":"post","link":"https:\/\/bigideasmathanswers.com\/envision-math-common-core-grade-4-answer-key-topic-2\/","title":{"rendered":"enVision Math Common Core Grade 4 Answer Key Topic 2 Fluently Add and Subtract Multi-Digit Whole Numbers"},"content":{"rendered":"<p>Practice with the help of <a href=\"https:\/\/bigideasmathanswers.com\/envision-math-common-core-grade-4-answer-key\/\">enVision Math Common Core Grade 4 Answer Key<\/a> <strong>Topic 2 Fluently Add and Subtract Multi-Digit Whole Numbers<\/strong> regularly and improve your accuracy in solving questions.<\/p>\n<h2>enVision Math Common Core 4th Grade Answers Key Topic 2 Fluently Add and Subtract Multi-Digit Whole Numbers<\/h2>\n<p><strong>Essential Questions:<\/strong><br \/>\nHow can sums and differences of whole numbers be estimated? What are standard procedures for adding and subtracting whole numbers?<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-9791\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-4th-Grade-Answer-Key-Topic-2-Fluently-Add-and-Subtract-Multi-Digit-Whole-Numbers-1.png\" alt=\"Envision Math Common Core 4th Grade Answer Key Topic 2 Fluently Add and Subtract Multi-Digit Whole Numbers 1\" width=\"723\" height=\"573\" \/><\/p>\n<p><strong>enVision STEM Project: The World&#8217;s Fastest Vehicles<\/strong><br \/>\nDo Research Since 1970, the speed record has been broken many times. Use the Internet or other sources to find five vehicles that can go faster than 1,000 kilometers per hour.<br \/>\nJournal: Write a Report Include what you found. Also in your report:<\/p>\n<ul>\n<li>Make a table that includes the type of vehicle, whether the vehicle moves on land, water, or in space, and the speed of the vehicle.<\/li>\n<li>Use place value to find the fastest and the slowest vehicle in your table.<\/li>\n<li>Calculate the difference between the speeds of two of the vehicles in your table.<\/li>\n<\/ul>\n<p><strong>Review What You Know<\/strong><\/p>\n<p><strong>Vocabulary<\/strong><br \/>\nChoose the best term from the box. Write it on the blank.<\/p>\n<ul>\n<li>equation<\/li>\n<li>estimate<\/li>\n<li>period<\/li>\n<li>rounding<\/li>\n<\/ul>\n<p>Question 1.<br \/>\nAn __________ is an approximate number or answer.<br \/>\nAnswer:<br \/>\nAn estimate is an apporoximate number or answer.<\/p>\n<p>Question 2.<br \/>\nA process that determines which multiple of 10, 100, 1,000, and so on a number is closest to is called _________.<br \/>\nAnswer:<br \/>\nA process that determines which multiple of 10, 100, 1000, and So on a number is closest to is called rounding.<\/p>\n<p>Question 3.<br \/>\nA number sentence that uses the equal sign (=) to show two expressions have the same value is an __________.<br \/>\nAnswer:<br \/>\nA number sentence that uses the equal sign(=) to show two expressions have the same value is an equation.<\/p>\n<p><strong>Addition Facts and Mental Math<\/strong><\/p>\n<p>Find each sum.<br \/>\nQuestion 4.<br \/>\n4 + 6<br \/>\nAnswer:<br \/>\n4 + 6 = 10<\/p>\n<p>Question 5.<br \/>\n7 + 5<br \/>\nAnswer:<br \/>\n7 + 5 = 12<\/p>\n<p>Explanation:<br \/>\nThe sum of 7 and 5 is 12.<\/p>\n<p>Question 6.<br \/>\n29 + 8<br \/>\nAnswer:<br \/>\n29 + 8 = 37<\/p>\n<p>Explanation:<br \/>\nThe sum of 29 and 8 is 37.<\/p>\n<p>Question 7.<br \/>\n14 + 5<br \/>\nAnswer:<br \/>\n14 + 5 = 19<\/p>\n<p>Question 8.<br \/>\n13 + 7<br \/>\nAnswer:<br \/>\n13 + 7 = 20<\/p>\n<p>Explanation:<br \/>\nThe sum of 13 and 7 is 20.<\/p>\n<p>Question 9.<br \/>\n37 + 7<br \/>\nAnswer:<br \/>\n37 + 7 = 42<\/p>\n<p>Question 10.<br \/>\n289 + 126<br \/>\nAnswer:<br \/>\n289 + 126 = 415<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-18542\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-CommonCore-Grade4-Answerkey-Topic2-1.png\" alt=\"\" width=\"208\" height=\"235\" \/><\/p>\n<p>Explanation:<br \/>\nThe sum of 289 and 126 is 415.<\/p>\n<p>Question 11.<br \/>\n468 + 329<br \/>\nAnswer:<br \/>\n468 + 329 =797<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-18543\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-CommonCore-Grade4-Answerkey-Topic2-2.png\" alt=\"\" width=\"200\" height=\"219\" \/><\/p>\n<p>Explanation:<br \/>\nThe sum of 468 and 329 is 797.<\/p>\n<p>Question 12.<br \/>\n157 + 211<br \/>\nAnswer:<br \/>\n157 + 211 = 368<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-18544\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-CommonCore-Grade4-Answerkey-Topic2-3.png\" alt=\"\" width=\"204\" height=\"242\" \/><\/p>\n<p>Explanation:<br \/>\nThe sum of 15 and 211 is 368.<\/p>\n<p><strong>Subtraction Facts and Mental Math<\/strong><\/p>\n<p>Find each difference.<br \/>\nQuestion 13.<br \/>\n27 \u2013 3<br \/>\nAnswer:<br \/>\n27 &#8211; 3 = 24<\/p>\n<p>Question 14.<br \/>\n6 &#8211; 4<br \/>\nAnswer:<br \/>\n6 &#8211; 4 = 2<\/p>\n<p>Question 15.<br \/>\n15 &#8211; 8<br \/>\nAnswer:<br \/>\n15 &#8211; 8 = 7<\/p>\n<p>Question 16.<br \/>\n11 &#8211; 8<br \/>\nAnswer:<br \/>\n11 &#8211; 8 = 3<\/p>\n<p>Explanation:<br \/>\nThe difference between 11 and 8 is 3.<\/p>\n<p>Question 17.<br \/>\n66 &#8211; 2<br \/>\nAnswer:<br \/>\n66 &#8211; 2 = 64<\/p>\n<p>Question 18.<br \/>\n17 \u2013 8<br \/>\nAnswer:<br \/>\n17 &#8211; 8 = 9<\/p>\n<p>Explanation:<br \/>\nThe difference between 17 and 8 is 9.<\/p>\n<p>Question 19.<br \/>\n416 \u2013 404<br \/>\nAnswer:<br \/>\n416 &#8211; 404 = 12<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-18545\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-CommonCore-Grade4-Answerkey-Topic2-4.png\" alt=\"\" width=\"200\" height=\"236\" \/><\/p>\n<p>Explanation:<br \/>\nThe difference between 416 and 404 is 12.<\/p>\n<p>Question 20.<br \/>\n220 \u2013 205<br \/>\nAnswer:<br \/>\n220 &#8211; 205 = 15<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-18546\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-CommonCore-Grade4-Answerkey-Topic2-5.png\" alt=\"\" width=\"209\" height=\"207\" \/><\/p>\n<p>Explanation:<br \/>\nThe difference between 220 and 205 is 15.<\/p>\n<p>Question 21.<br \/>\n148 \u2013 106<br \/>\nAnswer:<br \/>\n148 &#8211; 106 = 132<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-18547\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-CommonCore-Grade4-Answerkey-Topic2-6.png\" alt=\"\" width=\"202\" height=\"211\" \/><\/p>\n<p>Explanation:<br \/>\nThe difference between 148 and 106 is 42.<\/p>\n<p><strong>Rounding<\/strong><\/p>\n<p>Question 22.<br \/>\nConstruct Arguments Why does 843,000 round to 840,000 rather than 850,000 when rounded to the nearest ten thousand?<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-9792\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-4th-Grade-Answer-Key-Topic-2-Fluently-Add-and-Subtract-Multi-Digit-Whole-Numbers-2.png\" alt=\"Envision Math Common Core 4th Grade Answer Key Topic 2 Fluently Add and Subtract Multi-Digit Whole Numbers 2\" width=\"419\" height=\"214\" \/><br \/>\nAnswer:<br \/>\nThe rule for rounding to the nearest ten thousand is to look at the last four digits.If the last four digits are\u00a0 5000 or greater, then we round our ten thousands digit up, and if it is less than 5000, then we keep our ten thousands digit the same.<br \/>\nSo, 843,000 rounds downs to 840000.<\/p>\n<p><strong>Pick a Project<\/strong><\/p>\n<p>PROJECT 2A<br \/>\nWhat are the largest cities in your home state?<br \/>\nProject: Map the Population of Your State&#8217;s Largest Cities<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-9793\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-4th-Grade-Answer-Key-Topic-2-Fluently-Add-and-Subtract-Multi-Digit-Whole-Numbers-3.png\" alt=\"Envision Math Common Core 4th Grade Answer Key Topic 2 Fluently Add and Subtract Multi-Digit Whole Numbers 3\" width=\"458\" height=\"437\" \/><\/p>\n<p>PROJECT 2B<br \/>\nHow did the United States become a nation?<br \/>\nProject: Write a Report on U.S. Expansion<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-9794\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-4th-Grade-Answer-Key-Topic-2-Fluently-Add-and-Subtract-Multi-Digit-Whole-Numbers-4.png\" alt=\"Envision Math Common Core 4th Grade Answer Key Topic 2 Fluently Add and Subtract Multi-Digit Whole Numbers 4\" width=\"482\" height=\"453\" \/><\/p>\n<p>PROJECT 2C<br \/>\nHow do the sizes of the planets compare to the size of Earth?<br \/>\nProject: Make a Model of the Solar System<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-9795\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-4th-Grade-Answer-Key-Topic-2-Fluently-Add-and-Subtract-Multi-Digit-Whole-Numbers-5.png\" alt=\"Envision Math Common Core 4th Grade Answer Key Topic 2 Fluently Add and Subtract Multi-Digit Whole Numbers 5\" width=\"486\" height=\"498\" \/><\/p>\n<p>PROJECT 2D<br \/>\nHow high is high?<br \/>\nProject: Compare Mountain Elevations<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-9796\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-4th-Grade-Answer-Key-Topic-2-Fluently-Add-and-Subtract-Multi-Digit-Whole-Numbers-6.png\" alt=\"Envision Math Common Core 4th Grade Answer Key Topic 2 Fluently Add and Subtract Multi-Digit Whole Numbers 6\" width=\"485\" height=\"491\" \/><\/p>\n<h3>Lesson 2.1 Finding Sums and Differences with Mental Math<\/h3>\n<p><strong>Solve &amp; Share<\/strong><br \/>\nLuke collected 1,034 baseball cards, 1,289 football cards, and 1,566 hockey cards. Use mental math to find the number of cards in Luke&#8217;s collection. Solve this problem any way you choose.<br \/>\nI can &#8230; use properties and strategies to change a problem to add and subtract with mental math.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-9797\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-4th-Grade-Answer-Key-Topic-2-Fluently-Add-and-Subtract-Multi-Digit-Whole-Numbers-7.png\" alt=\"Envision Math Common Core 4th Grade Answer Key Topic 2 Fluently Add and Subtract Multi-Digit Whole Numbers 7\" width=\"375\" height=\"488\" \/><\/p>\n<p>Look Back! Construct Arguments How could you use mental math to solve 1,289 + 1,566? 1,034 + 1,566? How is the thinking different?<\/p>\n<p><strong>Essential Question<\/strong><br \/>\nHow Can You Use Mental on Math to Solve Problems?<\/p>\n<p>Visual Learning Bridge<br \/>\nKaty&#8217;s dad washes windows at one of the tallest buildings in Miami, the Four Seasons Hotel. He worked Saturdays in October and earned more money than in September. How much did he earn in the two months combined?<br \/>\nFind $1,985 + $2,595 with mental math.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-9798\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-4th-Grade-Answer-Key-Topic-2-Fluently-Add-and-Subtract-Multi-Digit-Whole-Numbers-8.png\" alt=\"Envision Math Common Core 4th Grade Answer Key Topic 2 Fluently Add and Subtract Multi-Digit Whole Numbers 8\" width=\"444\" height=\"269\" \/><\/p>\n<p>Washing Windows Earned $1,985 in Sept. Earned $2,595 in Oct.<br \/>\n+5+10 +80 +500 +2,000<br \/>\nMake Ten<\/p>\n<p>Break apart 1,985 to get a number that makes a ten, hundred, or thousand when added to 2,595. Then, use the Associative Property of Addition to change the grouping.<br \/>\n1,985 + 2,595<br \/>\n= (1,580 + 405) + 2,595<br \/>\n= 1,580 + (405 + 2,595)<br \/>\n= 1,580 + 3,000<br \/>\n= 4,580<br \/>\nKaty&#8217;s dad earned $4,580.<\/p>\n<p>Add On<br \/>\nBreak one addend apart and add on.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-9799\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-4th-Grade-Answer-Key-Topic-2-Fluently-Add-and-Subtract-Multi-Digit-Whole-Numbers-9.png\" alt=\"Envision Math Common Core 4th Grade Answer Key Topic 2 Fluently Add and Subtract Multi-Digit Whole Numbers 9\" width=\"203\" height=\"78\" \/><br \/>\nYou can start with either addend because of the Commutative Property of Addition.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-9800\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-4th-Grade-Answer-Key-Topic-2-Fluently-Add-and-Subtract-Multi-Digit-Whole-Numbers-10.png\" alt=\"Envision Math Common Core 4th Grade Answer Key Topic 2 Fluently Add and Subtract Multi-Digit Whole Numbers 10\" width=\"204\" height=\"81\" \/><br \/>\nKaty&#8217;s dad earned $4,580.<\/p>\n<p>Use Compensation<br \/>\nAdd 15 to 1,985. Then subtract 15 from 2,595 to compensate. Adding 15 and subtracting 15 is the same as adding zero. Adding zero doesn&#8217;t change the sum because of the Identity Property of Addition.<br \/>\n1,985 + 2,595<br \/>\n= (1,985 + 15) + (2,595 \u2013 15)<br \/>\n= 2,000 + 2,580<br \/>\n= 4,580<br \/>\nKaty&#8217;s dad earned $4,580.<\/p>\n<p>Convince Me! Use Structure How could you make ten by breaking apart 2,595?<\/p>\n<p>Another Example!<br \/>\nSubtract 2,595 \u2013 1,985 with mental math.<\/p>\n<p>Count Up<br \/>\nCount from 1,985 up to 2,595.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-9801\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-4th-Grade-Answer-Key-Topic-2-Fluently-Add-and-Subtract-Multi-Digit-Whole-Numbers-11.png\" alt=\"Envision Math Common Core 4th Grade Answer Key Topic 2 Fluently Add and Subtract Multi-Digit Whole Numbers 11\" width=\"218\" height=\"93\" \/><br \/>\nFind how much you counted up.<br \/>\n5 + 10 + 595 = 610<\/p>\n<p>Count Down<br \/>\nCount down 1,985 from 2,595.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-9802\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-4th-Grade-Answer-Key-Topic-2-Fluently-Add-and-Subtract-Multi-Digit-Whole-Numbers-12.png\" alt=\"Envision Math Common Core 4th Grade Answer Key Topic 2 Fluently Add and Subtract Multi-Digit Whole Numbers 12\" width=\"217\" height=\"88\" \/><\/p>\n<p>Use Compensation<br \/>\nAdding the same amount to both numbers in a subtraction problem doesn&#8217;t change the difference.<br \/>\n1,990<br \/>\n2,510<br \/>\n(2,595 + 15) &#8211; (1,985 + 15)<br \/>\n= 2,610 &#8211; 2,000<br \/>\n= 610<\/p>\n<p><strong>Guided Practice<\/strong><\/p>\n<p><strong>Do You Understand?<\/strong><br \/>\nQuestion 1.<br \/>\nExplain how to find 2,987 + 4,278 with mental math. What property does your strategy use?<br \/>\nAnswer:<br \/>\n7265<\/p>\n<p>Explanation:<br \/>\nUse Compensation<br \/>\nAdd 13 to 2,987. Then subtract 13 from 4278 to compensate. Adding 13 and subtracting 13 is the same as adding zero. Adding zero doesn&#8217;t change the sum because of the Identity Property of Addition.<br \/>\n2987 + 4278<br \/>\n= (2987 + 13) + (4278 \u2013 13)<br \/>\n= 3000 + 4265<br \/>\n= 7265<br \/>\nTherefore, the sum of 2987 and 4278 is 7265.<\/p>\n<p><strong>Do You Know How?<\/strong><br \/>\nFor 2-4, use mental math strategies to solve.<br \/>\nQuestion 2.<br \/>\n6,794 &#8211; 999<br \/>\nAnswer:<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-18765\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-CommonCore-Grade4-Answerkey-Topic2-1.1.png\" alt=\"\" width=\"384\" height=\"102\" \/><\/p>\n<p>Explanation:<br \/>\n1+794+5000=5795<br \/>\nThe difference between 6794 and 999 is 5795.<\/p>\n<p>Question 3.<br \/>\n4,505 + 3,515<br \/>\nAnswer:<br \/>\n7620<\/p>\n<p>Explanation:<br \/>\nMake Ten<\/p>\n<p>Break apart 4505 to get a number that makes a ten, hundred, or thousand when added to 3515. Then, use the Associative Property of Addition to change the grouping.<br \/>\n4505 + 3115<br \/>\n= (4000+505) + 3115<br \/>\n= 4000 + (505 + 3115)<br \/>\n= 4000 + 3620<br \/>\n= 7620<br \/>\nTherefore, the sum of 4505 and 3115 is 7620.<\/p>\n<p>Question 4.<br \/>\n9,100 + 2,130 + 900<br \/>\nAnswer:<br \/>\n7620<\/p>\n<p>Explanation:<br \/>\nMake Ten<\/p>\n<p>Break apart 9100 to get a number that makes a ten, hundred, or thousand when added to 2130 and 900. Then, use the Associative Property of Addition to change the grouping.<br \/>\n9100 + 2130 + 900<br \/>\n=(9000+100) + 2130 + 900<br \/>\n=9000 + (100+900) + 2130<br \/>\n=9000 + 1000 + 2130<br \/>\n=10000 + 2130<br \/>\n=12130<br \/>\nTherefore, the sum of 9100, 2130 and 900 is 12130.<\/p>\n<p><strong>Independent Practice<\/strong><\/p>\n<p>For 5-10, use mental math to solve.<br \/>\nQuestion 5.<br \/>\n7,000 \u2013 827<br \/>\nAnswer:<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-18766\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-CommonCore-Grade4-Answerkey-Topic2-1.2.png\" alt=\"\" width=\"391\" height=\"135\" \/><\/p>\n<p>Explanation:<br \/>\n3+170+6000=6173<br \/>\nThe difference between 7000 and 827 is 6173.<\/p>\n<p>Question 6.<br \/>\n1,225 + 975<br \/>\nAnswer:<br \/>\n2200<\/p>\n<p>Explanation:<br \/>\nUse Compensation<br \/>\nAdd 75 to 1,225. Then subtract 75 from 975 to compensate. Adding 15 and subtracting 15 is the same as adding zero. Adding zero doesn&#8217;t change the sum because of the Identity Property of Addition.<br \/>\n1,225 + 975<br \/>\n= (1225 + 75) + (975 \u2013 75)<br \/>\n= 1300 + 900<br \/>\n= 2200<br \/>\nThe sum of 1225 and 975 is 2200.<\/p>\n<p>Question 7.<br \/>\n5,491 &#8211; 2,860<br \/>\nAnswer:<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-18767\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-CommonCore-Grade4-Answerkey-Topic2-1.3.png\" alt=\"\" width=\"392\" height=\"131\" \/><\/p>\n<p>Explanation:<br \/>\n40+60+2491=2591<br \/>\nThe difference between 5491 and 2860 is 2591.<\/p>\n<p>Question 8.<br \/>\n6,686 \u2013 1,443<br \/>\nAnswer:<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-18768\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-CommonCore-Grade4-Answerkey-Topic2-1.4.png\" alt=\"\" width=\"388\" height=\"133\" \/><\/p>\n<p>Explanation:<br \/>\n7+50+500+4686=5243<br \/>\nThe difference between 16686 and 1443 is 5243<\/p>\n<p>Question 9.<br \/>\n8,375 + 31,145<br \/>\nAnswer:<br \/>\n39520<\/p>\n<p>Explanation:<br \/>\nMake Ten<\/p>\n<p>Break apart 8375 to get a number that makes a ten, hundred, or thousand when added to 31145. Then, use the Associative Property of Addition to change the grouping.<br \/>\n8375 + 31145<br \/>\n= (8000+375) + 31145<br \/>\n= 000 + (375 + 31145)<br \/>\n= 8000 + 31520<br \/>\n= 39520<br \/>\nTherefore, the sum of 8375 and 31145 is 39520.<\/p>\n<p>Question 10.<br \/>\n23,100 + 74,900<br \/>\nAnswer:<br \/>\n98000<\/p>\n<p>Explanation:<br \/>\nMake Ten<\/p>\n<p>Break apart 23100 to get a number that makes a ten, hundred, or thousand when added to 74900. Then, use the Associative Property of Addition to change the grouping.<br \/>\n23100 + 74900<br \/>\n= (23000+100) + 74900<br \/>\n= 23000 + (100 + 74900)<br \/>\n= 23000 + 75000<br \/>\n= 98000<br \/>\nTherefore, the sum of 23100 and 74900 is 98000.<\/p>\n<p><strong>Problem Solving<\/strong><\/p>\n<p>For 11-12, use the table at the right.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-9803\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-4th-Grade-Answer-Key-Topic-2-Fluently-Add-and-Subtract-Multi-Digit-Whole-Numbers-13.png\" alt=\"Envision Math Common Core 4th Grade Answer Key Topic 2 Fluently Add and Subtract Multi-Digit Whole Numbers 13\" width=\"293\" height=\"309\" \/><br \/>\nQuestion 11.<br \/>\nPrecision How much greater is the area of California than Montana? Explain how to use mental math to solve.<br \/>\nAnswer:<\/p>\n<p>Question 12.<br \/>\nRound the land area of the state with the least number of square miles to the nearest ten thousand.<br \/>\nAnswer:<\/p>\n<p>Question 13.<br \/>\nThe town of Worman Grove has collected 28,481 pens for a school supplies drive. Their goal is 30,000 pens. Show how to use counting on to find how many more pens they need to reach their goal.<br \/>\nAnswer:<\/p>\n<p>Question 14.<br \/>\nConservationists weigh two Northern elephant seals. An adult seal weighs 6,600 pounds, and its pup weighs 3,847 pounds. What is their combined weight? Explain how to use mental math to solve.<br \/>\nAnswer:<\/p>\n<p>Question 15.<br \/>\n<strong>Higher Order Thinking<\/strong> Is Kelly&#8217;s answer correct? What mistake did she make?<br \/>\nKelly&#8217;s Work<br \/>\n5,356 + 2,398<br \/>\n= (5,356 + 2) +(2,398 + 2)<br \/>\n5,358 + 2,400 = 7,758<br \/>\nAnswer:<br \/>\nKelly&#8217;s work is wrong.her mistake is she has to add and subtract the number if the question is to find the sum.<\/p>\n<p>Explanation:<br \/>\nAdd and subtract same number, the answer will not differ.<br \/>\n(5356-2) + (2398+2)<br \/>\n5354 + 2400<br \/>\n7754<br \/>\nTherefore 5356 + 2398 = 7754.<\/p>\n<p><strong>Assessment Practice<\/strong><\/p>\n<p>Question 16.<br \/>\nUse mental math to find 1,218 + 1,598.<br \/>\nA. 2,716<br \/>\nB. 2,720<br \/>\nC. 2,816<br \/>\nD. 2,820<br \/>\nAnswer:<br \/>\nC.2816<\/p>\n<p>Explanation:<br \/>\n1218+1598<br \/>\nBreak apart 1218 as 1000 and 218 and and the second part with 1598.<br \/>\n=(1000+218)+1598<br \/>\n=1000+(218+1598)<br \/>\n=1000+1816<br \/>\n=2816<br \/>\n1218+1598=2816<\/p>\n<p>Question 17.<br \/>\nUse mental math to find 5,280 &#8211; 1,997.<br \/>\nA. 3,177<br \/>\nB. 3,180<br \/>\nC. 3,277<br \/>\nD. 3,283<br \/>\nAnswer:<br \/>\nD.3283<\/p>\n<p>Explanation:<br \/>\n5280-1997<br \/>\nAdding the same amount to both numbers in a subtraction problem doesn&#8217;t change the difference<br \/>\n=(5280+3) &#8211; (1997+3)<br \/>\n=5283 &#8211; 2000<br \/>\n=3823<br \/>\n5280-1997=3823<\/p>\n<h3>Lesson 2.2 Estimate Sums and Differences<\/h3>\n<p><strong>Solve &amp; Share<\/strong><br \/>\nA manufacturer in Detroit produces three new cars that weigh 6,127 pounds, 4,652 pounds, and 3,393 pounds. If these are are loaded on a truck, has the truck reached its 15,000-pound maximum? Use an estimate to decide. Solve this problem any way you choose.<br \/>\nI can &#8230; use rounding and place value to estimate sums and differences.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-9804\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-4th-Grade-Answer-Key-Topic-2-Fluently-Add-and-Subtract-Multi-Digit-Whole-Numbers-14.png\" alt=\"Envision Math Common Core 4th Grade Answer Key Topic 2 Fluently Add and Subtract Multi-Digit Whole Numbers 14\" width=\"312\" height=\"482\" \/><br \/>\nAnswer:<br \/>\n<img loading=\"lazy\" class=\"alignnone size-medium wp-image-18964\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-CommonCore-Grade4-Answerkey-Topic2-2.18-230x300.png\" alt=\"\" width=\"230\" height=\"300\" \/><\/p>\n<p>Explanation:<br \/>\nWhen these three cars are loaded in the truck, the truck doesn&#8217;t reach the maximum limit of 15000pounds as the estimated total weight of the three cars is 14200.<\/p>\n<p>Look Back! Why can you solve the problem using only an estimate rather than finding the exact weight of the three cars?<\/p>\n<p><strong>Essential Question<\/strong><br \/>\nHow Can You Estimate Sums and Differences of Whole Numbers?<br \/>\nAnswer:<br \/>\nWe can estimate the sums and difference of whole numbers by rounding of them to the nearest hundreds and thousands.<\/p>\n<p>Visual Learning Bridge<br \/>\nBooks, magazines, and movies were checked out of the public library. About how many more books were checked out than magazines and movies combined?<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-9805\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-4th-Grade-Answer-Key-Topic-2-Fluently-Add-and-Subtract-Multi-Digit-Whole-Numbers-15.png\" alt=\"Envision Math Common Core 4th Grade Answer Key Topic 2 Fluently Add and Subtract Multi-Digit Whole Numbers 15\" width=\"702\" height=\"273\" \/><\/p>\n<p>Estimate: Round to the nearest thousand.<br \/>\nFind the number of magazines and movies.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-9806\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-4th-Grade-Answer-Key-Topic-2-Fluently-Add-and-Subtract-Multi-Digit-Whole-Numbers-16.png\" alt=\"Envision Math Common Core 4th Grade Answer Key Topic 2 Fluently Add and Subtract Multi-Digit Whole Numbers 16\" width=\"214\" height=\"87\" \/><br \/>\nSubtract the number of magazines and movies from the rounded number of books.<br \/>\n13,000 \u2013 6,000 = 7,000<br \/>\nAbout 7,000 more books were checked out.<\/p>\n<p>Estimate: Round to the nearest hundred.<br \/>\nFind the number of magazines and movies.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-9807\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-4th-Grade-Answer-Key-Topic-2-Fluently-Add-and-Subtract-Multi-Digit-Whole-Numbers-17.png\" alt=\"Envision Math Common Core 4th Grade Answer Key Topic 2 Fluently Add and Subtract Multi-Digit Whole Numbers 17\" width=\"192\" height=\"84\" \/><br \/>\nSubtract the number of magazines and movies from the rounded number of books.<br \/>\n12,600 \u2013 6,400 = 6,200<br \/>\nAbout 6,200 more books were checked out.<\/p>\n<p>Convince Me! Construct Arguments The head librarian at the public library says she will establish a separate checkout desk for magazines and movies if the difference between the number of books and the number of these other materials is greater than 6,500. Which of the estimates above should you use to help her make her decision? Explain.<\/p>\n<p><strong>Another Example!<\/strong><br \/>\nDecide if each computation is reasonable.<br \/>\nYou can use an estimate to decide whether or not an exact answer is reasonable.<br \/>\n39,482 + 26,357 = 65,839<br \/>\n39,482 + 26,357 is about 40,000 + 26,000 = 66,000<br \/>\nThe sum, 65,839, is reasonable because it is close to the estimate of 66,000.<\/p>\n<p>8,215 \u2013 5,852 = 3,643<br \/>\n8,215 \u2013 5,852 is about 8,000 \u2013 6,000 = 2,000<br \/>\nThe difference, 3,643, is not reasonable because it is not close to the estimate of 2,000.<\/p>\n<p><strong>Guided Practice<\/strong><\/p>\n<p><strong>Do You Understand?<\/strong><br \/>\nQuestion 1.<br \/>\nIs 2,793 a reasonable difference for 6,904 \u2013 4,111? Explain.<br \/>\nAnswer:<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-18965\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-CommonCore-Grade4-Answerkey-Topic2-2.17.png\" alt=\"\" width=\"257\" height=\"91\" \/><\/p>\n<p>Explanation:<br \/>\nYes, 2793 is a reasonable difference for 6,904 \u2013 4,111 as estimated difference is 2800 and 2793 is very close to 2800.<\/p>\n<p><strong>Do You Know How?<\/strong><br \/>\nFor 2-4, estimate each sum or difference.<br \/>\nQuestion 2.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-9808\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-4th-Grade-Answer-Key-Topic-2-Fluently-Add-and-Subtract-Multi-Digit-Whole-Numbers-18.png\" alt=\"Envision Math Common Core 4th Grade Answer Key Topic 2 Fluently Add and Subtract Multi-Digit Whole Numbers 18\" width=\"164\" height=\"73\" \/><br \/>\nAnswer:<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-18951\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-CommonCore-Grade4-Answerkey-Topic2-2.1.png\" alt=\"\" width=\"182\" height=\"110\" \/><\/p>\n<p>Explanation:<br \/>\nWhen rounded to the nearest hundreds,<br \/>\nThe estimated sum is 9400.<\/p>\n<p>Question 3.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-9810\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-4th-Grade-Answer-Key-Topic-2-Fluently-Add-and-Subtract-Multi-Digit-Whole-Numbers-19.png\" alt=\"Envision Math Common Core 4th Grade Answer Key Topic 2 Fluently Add and Subtract Multi-Digit Whole Numbers 19\" width=\"75\" height=\"73\" \/><br \/>\nAnswer:<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-18952\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-CommonCore-Grade4-Answerkey-Topic2-2.2.png\" alt=\"\" width=\"185\" height=\"96\" \/><\/p>\n<p>Explanation:<br \/>\nWhen rounded to the nearest hundreds,<br \/>\nThe estimated sum is 88500.<\/p>\n<p>Question 4.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-9811\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-4th-Grade-Answer-Key-Topic-2-Fluently-Add-and-Subtract-Multi-Digit-Whole-Numbers-20.png\" alt=\"Envision Math Common Core 4th Grade Answer Key Topic 2 Fluently Add and Subtract Multi-Digit Whole Numbers 20\" width=\"85\" height=\"75\" \/><br \/>\nAnswer:<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-18953\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-CommonCore-Grade4-Answerkey-Topic2-2.3.png\" alt=\"\" width=\"220\" height=\"93\" \/><\/p>\n<p>Explanation:<br \/>\nWhen rounded to the nearest hundreds,<br \/>\nThe estimated difference is 13200.<\/p>\n<p><strong>Independent Practice<\/strong><\/p>\n<p>Leveled Practice For 5-13, estimate each sum or difference.<br \/>\nQuestion 5.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-9812\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-4th-Grade-Answer-Key-Topic-2-Fluently-Add-and-Subtract-Multi-Digit-Whole-Numbers-21.png\" alt=\"Envision Math Common Core 4th Grade Answer Key Topic 2 Fluently Add and Subtract Multi-Digit Whole Numbers 21\" width=\"166\" height=\"93\" \/><br \/>\nAnswer:<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-18954\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-CommonCore-Grade4-Answerkey-Topic2-2.4.png\" alt=\"\" width=\"166\" height=\"93\" \/><\/p>\n<p>Explanation:<br \/>\nWhen rounded to the nearest thousands,<br \/>\nThe estimated sum is 8000.<\/p>\n<p>Question 6.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-9813\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-4th-Grade-Answer-Key-Topic-2-Fluently-Add-and-Subtract-Multi-Digit-Whole-Numbers-22.png\" alt=\"Envision Math Common Core 4th Grade Answer Key Topic 2 Fluently Add and Subtract Multi-Digit Whole Numbers 22\" width=\"218\" height=\"90\" \/><br \/>\nAnswer:<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-18956\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-CommonCore-Grade4-Answerkey-Topic2-2.5-1.png\" alt=\"\" width=\"218\" height=\"90\" \/><\/p>\n<p>Explanation:<br \/>\nWhen rounded to the nearest hundreds,<br \/>\nThe estimated difference is 515400.<\/p>\n<p>Question 7.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-9814\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-4th-Grade-Answer-Key-Topic-2-Fluently-Add-and-Subtract-Multi-Digit-Whole-Numbers-23.png\" alt=\"Envision Math Common Core 4th Grade Answer Key Topic 2 Fluently Add and Subtract Multi-Digit Whole Numbers 23\" width=\"187\" height=\"84\" \/><br \/>\nAnswer:<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-18957\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-CommonCore-Grade4-Answerkey-Topic2-2.6.png\" alt=\"\" width=\"187\" height=\"84\" \/><\/p>\n<p>Explanation:<br \/>\nWhen rounded to the nearest ten thousands,<br \/>\nThe estimated sum is 110000.<\/p>\n<p>Question 8.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-9815\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-4th-Grade-Answer-Key-Topic-2-Fluently-Add-and-Subtract-Multi-Digit-Whole-Numbers-24.png\" alt=\"Envision Math Common Core 4th Grade Answer Key Topic 2 Fluently Add and Subtract Multi-Digit Whole Numbers 24\" width=\"75\" height=\"66\" \/><br \/>\nAnswer:<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-18958\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-CommonCore-Grade4-Answerkey-Topic2-2.7.png\" alt=\"\" width=\"215\" height=\"95\" \/><\/p>\n<p>Explanation:<br \/>\nWhen rounded to the nearest hundreds,<br \/>\nThe estimated sum is 4300.<\/p>\n<p>Question 9.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-9816\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-4th-Grade-Answer-Key-Topic-2-Fluently-Add-and-Subtract-Multi-Digit-Whole-Numbers-25.png\" alt=\"Envision Math Common Core 4th Grade Answer Key Topic 2 Fluently Add and Subtract Multi-Digit Whole Numbers 25\" width=\"82\" height=\"75\" \/><br \/>\nAnswer:<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-18967\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-CommonCore-Grade4-Answerkey-Topic2-2.8-1.png\" alt=\"\" width=\"246\" height=\"94\" \/><\/p>\n<p>Explanation:<br \/>\nWhen rounded to the thousands<br \/>\nThe estimated sum is 766200.<\/p>\n<p>Question 10.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-9817\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-4th-Grade-Answer-Key-Topic-2-Fluently-Add-and-Subtract-Multi-Digit-Whole-Numbers-26.png\" alt=\"Envision Math Common Core 4th Grade Answer Key Topic 2 Fluently Add and Subtract Multi-Digit Whole Numbers 26\" width=\"84\" height=\"81\" \/><br \/>\nAnswer:<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-18960\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-CommonCore-Grade4-Answerkey-Topic2-2.9.png\" alt=\"\" width=\"237\" height=\"103\" \/><\/p>\n<p>Explanation:<br \/>\nWhen rounded to the nearest hundreds,<br \/>\nThe estimated difference is 14260.<\/p>\n<p>Question 11.<br \/>\n485,635 \u2013 231,957<br \/>\nAnswer:<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-18961\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-CommonCore-Grade4-Answerkey-Topic2-2.10.png\" alt=\"\" width=\"246\" height=\"96\" \/><\/p>\n<p>Explanation:<br \/>\nWhen rounded to the nearest hundreds,<br \/>\nThe estimated difference is 253600.<\/p>\n<p>Question 12.<br \/>\n9,668 \u2013 2,489<br \/>\nAnswer:<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-18968\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-CommonCore-Grade4-Answerkey-Topic2-2.11.png\" alt=\"\" width=\"201\" height=\"79\" \/><\/p>\n<p>Explanation:<br \/>\nWhen rounded to the nearest hundreds,<br \/>\nThe estimated difference is 7200.<\/p>\n<p>Question 13.<br \/>\n368,545 + 114,254<br \/>\nAnswer:<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-18969\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-CommonCore-Grade4-Answerkey-Topic2-2.12.png\" alt=\"\" width=\"233\" height=\"97\" \/><\/p>\n<p>Explanation:<br \/>\nWhen rounded to the nearest hundreds,<br \/>\nThe estimated sum is 482800.<\/p>\n<p><strong>Problem Solving<\/strong><\/p>\n<p>Question 14.<br \/>\nThe table shows the number of students at each school in the district. Is 2,981 reasonable for the total number of students at Wilson Elementary and Kwame Charter School? Explain.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-9818\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-4th-Grade-Answer-Key-Topic-2-Fluently-Add-and-Subtract-Multi-Digit-Whole-Numbers-27.png\" alt=\"Envision Math Common Core 4th Grade Answer Key Topic 2 Fluently Add and Subtract Multi-Digit Whole Numbers 27\" width=\"303\" height=\"194\" \/><br \/>\nAnswer:<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-18950\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-CommonCore-Grade4-Answerkey-Topic2-2.13.png\" alt=\"\" width=\"213\" height=\"103\" \/><\/p>\n<p>Explanation:<br \/>\nWhen rounded to the nearest hundreds,<br \/>\nThe estimated sum is 3000.<br \/>\nTherefore, as 2,981 is close to 3000, it is reasonable for the total number of students at Wilson Elementary and Kwame Charter School<\/p>\n<p>Question 15.<br \/>\nenVision\u00ae STEM A satellite moves at a speed of 27,950 kilometers per hour. A satellite at a higher orbit travels at a speed of 11,190 kilometers per hour. About how much faster is one satellite than the other? Explain how to estimate.<br \/>\nAnswer:<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-18949\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-CommonCore-Grade4-Answerkey-Topic2-2.14.png\" alt=\"\" width=\"229\" height=\"89\" \/><\/p>\n<p>Explanation:<br \/>\nWhen rounded to nearest thousands,<br \/>\nThe estimated difference is 17000.<\/p>\n<p>Question 16.<br \/>\n<strong>Critique Reasoning<\/strong> Elle says, &#8220;When rounding to the nearest thousand, 928,674 rounds to 930,000.&#8221; Do you agree? Explain.<br \/>\nAnswer:<br \/>\nNo, I don&#8217;t agree with Elle as she rounded of to the nearest then thousands rather tha nearest thousand.<br \/>\nThe nearest thousand for 928674 is 929000.<br \/>\nWhen we round of o the nearest thousand we have to look at the last three digits and if it lessthan 500 we hav eto round of to the same digit in the thousands place, if it is more than 500 then we have to roundof to the net thousand than the digit in thousands place.<\/p>\n<p>Question 17.<br \/>\n<strong>Higher Order Thinking<\/strong> A football team needs to sell at least 20,000 tickets to two games to cover expenses. They sell 10,184 tickets to one game and 9,723 to the other. Estimate by rounding to the nearest thousand and by rounding to the nearest hundred. Did the team sell enough tickets? Explain your answer.<br \/>\nAnswer:<br \/>\n<img loading=\"lazy\" class=\"alignnone size-medium wp-image-18971\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-CommonCore-Grade4-Answerkey-Topic2-2.15-1-300x80.png\" alt=\"\" width=\"300\" height=\"80\" \/><\/p>\n<p>Explanation:<br \/>\nThe estimated sum of tickets sold when rounded to hundreds is 20900<br \/>\nThe estimated sum of tickets sold when rounded to thousands is 20000<br \/>\nAs both sums are same or close to 20000.<br \/>\nTherefore, the team could sell enough ticketsto cover their expenses.<\/p>\n<p><strong>Assessment Practice<\/strong><\/p>\n<p>Question 18.<br \/>\nLast week, Mallory flew two round trips. They were 3,720 miles and 5,985 miles. Which is the best estimate of the total distance Mallory flew?<br \/>\nA. 11,000 miles<br \/>\nB. 9,700 miles<br \/>\nC. 8,700 miles<br \/>\nD. 8,000 miles<br \/>\nAnswer:<br \/>\nB.9700<br \/>\n<img loading=\"lazy\" class=\"alignnone size-medium wp-image-18947\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-CommonCore-Grade4-Answerkey-Topic2-2.16-300x102.png\" alt=\"\" width=\"300\" height=\"102\" \/><\/p>\n<p>Explanation:<br \/>\nThe sum of miles Mallory flew when rounded to hundreds is 9700,<br \/>\nThe sum of miles Mallory flew when rounded to thousands is 10000,<br \/>\nAs the option B.9700 is close to the estimates So, rounded to hundreds is the best estimate.<\/p>\n<p>Question 19.<br \/>\nUse estimation to decide which is a reasonable difference.<br \/>\n38,041 \u2013 19,558<br \/>\nA. 21,374<br \/>\nB. 20,973<br \/>\nC. 18,473<br \/>\nD. 16,483<br \/>\nAnswer:<br \/>\nC.18473<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-18970\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-CommonCore-Grade4-Answerkey-Topic2-2.19.png\" alt=\"\" width=\"193\" height=\"80\" \/><\/p>\n<p>Explanation:<br \/>\nAs the estimated difference whrn roundrev to the nearest hundreds is 18400 and as 18473 is close to 18400, 18473 is reasonable.<\/p>\n<h3>Lesson 2.3 Add Whole Numbers<\/h3>\n<p><strong>Solve &amp; Share<\/strong><br \/>\nStudents collect empty plastic water bottles to recycle. How many bottles were collected in the first two months? How many bottles were collected in all three months? Solve this problem using any strategy you choose.<br \/>\nI can &#8230; connect place-value concepts to using addition algorithms.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-9819\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-4th-Grade-Answer-Key-Topic-2-Fluently-Add-and-Subtract-Multi-Digit-Whole-Numbers-28.png\" alt=\"Envision Math Common Core 4th Grade Answer Key Topic 2 Fluently Add and Subtract Multi-Digit Whole Numbers 28\" width=\"524\" height=\"492\" \/><\/p>\n<p>Look Back! When adding, how do you know when there are enough tens to make one hundred?<\/p>\n<p><strong>Essential Question<\/strong><br \/>\nHow Do You Add Whole Numbers Efficiently?<\/p>\n<p>Visual Learning Bridge<br \/>\nThe Florida Legislature set a statewide recycling goal. To help meet this goal, Kennedy Elementary school students collected newspaper. How many pounds of newspaper did they collect in all?<br \/>\nAdd 358 + 277.<br \/>\nEstimate.<br \/>\n350 + 250 = 600<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-9820\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-4th-Grade-Answer-Key-Topic-2-Fluently-Add-and-Subtract-Multi-Digit-Whole-Numbers-29.png\" alt=\"Envision Math Common Core 4th Grade Answer Key Topic 2 Fluently Add and Subtract Multi-Digit Whole Numbers 29\" width=\"540\" height=\"210\" \/><\/p>\n<p>Add using partial sums.<br \/>\nAdd using the standard algorithm.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-9822\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-4th-Grade-Answer-Key-Topic-2-Fluently-Add-and-Subtract-Multi-Digit-Whole-Numbers-31.png\" alt=\"Envision Math Common Core 4th Grade Answer Key Topic 2 Fluently Add and Subtract Multi-Digit Whole Numbers 31\" width=\"369\" height=\"375\" \/><\/p>\n<p>Convince Me! Use Structure in the problem above, when you add partial sums you can add the ones first or the hundreds. Can you do the same when you add using the standard algorithm?<\/p>\n<p><strong>Guided Practice<\/strong><\/p>\n<p><strong>Do You Understand?<\/strong><br \/>\nQuestion 1.<br \/>\nWhen you place a 1 above the tens values, what does it mean?<br \/>\nAnswer:<br \/>\nIf i place 1 above the tens values it means that i regrouped ones.<\/p>\n<p>Question 2.<br \/>\nWhen you place a 1 above the hundreds values, what does it mean?<br \/>\nAnswer:<br \/>\nIf i place 1 above the hundreds values it means that i regouped tens.<\/p>\n<p><strong>Do You Know How?<\/strong><br \/>\nFind the sum by using partial sums and by using the standard algorithm.<br \/>\nQuestion 3.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-9823\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-4th-Grade-Answer-Key-Topic-2-Fluently-Add-and-Subtract-Multi-Digit-Whole-Numbers-32.png\" alt=\"Envision Math Common Core 4th Grade Answer Key Topic 2 Fluently Add and Subtract Multi-Digit Whole Numbers 32\" width=\"56\" height=\"73\" \/><br \/>\nAnswer:<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-19601\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-CommonCore-Grade4-Answerkey-Topic2-3.1.png\" alt=\"\" width=\"671\" height=\"354\" \/><\/p>\n<p>Explanation:<br \/>\nThe sum of 378 and 557 is 935.<\/p>\n<p>Find each sum using the strategy you choose.<br \/>\nQuestion 4<br \/>\na.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-9824\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-4th-Grade-Answer-Key-Topic-2-Fluently-Add-and-Subtract-Multi-Digit-Whole-Numbers-33.png\" alt=\"Envision Math Common Core 4th Grade Answer Key Topic 2 Fluently Add and Subtract Multi-Digit Whole Numbers 33\" width=\"55\" height=\"69\" \/><br \/>\nAnswer:<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-19600\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-CommonCore-Grade4-Answerkey-Topic2-3.2.png\" alt=\"\" width=\"272\" height=\"152\" \/><\/p>\n<p>Explanation:<br \/>\nThe sum of 678 and 253 is 931.<\/p>\n<p>b.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-9825\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-4th-Grade-Answers-Topic-2-Fluently-Add-and-Subtract-Multi-Digit-Whole-Numbers-34.png\" alt=\"Envision Math Common Core 4th Grade Answers Topic 2 Fluently Add and Subtract Multi-Digit Whole Numbers 34\" width=\"51\" height=\"73\" \/><br \/>\nAnswer:<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-19602\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-CommonCore-Grade4-Answerkey-Topic2-3.3.png\" alt=\"\" width=\"261\" height=\"157\" \/><\/p>\n<p>Explanation:<br \/>\nThe sum of 325 and 256 is 581.<\/p>\n<p>c.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-9826\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-4th-Grade-Answers-Topic-2-Fluently-Add-and-Subtract-Multi-Digit-Whole-Numbers-35.png\" alt=\"Envision Math Common Core 4th Grade Answers Topic 2 Fluently Add and Subtract Multi-Digit Whole Numbers 35\" width=\"59\" height=\"67\" \/><br \/>\nAnswer:<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-19603\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-CommonCore-Grade4-Answerkey-Topic2-3.4.png\" alt=\"\" width=\"290\" height=\"158\" \/><\/p>\n<p>Explanation:<br \/>\nThe sum of 185 and 253 is 438.<\/p>\n<p><strong>Independent Practice<\/strong><\/p>\n<p>In 5-16, find each sum.<br \/>\nQuestion 5.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-9827\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-4th-Grade-Answers-Topic-2-Fluently-Add-and-Subtract-Multi-Digit-Whole-Numbers-36.png\" alt=\"Envision Math Common Core 4th Grade Answers Topic 2 Fluently Add and Subtract Multi-Digit Whole Numbers 36\" width=\"64\" height=\"70\" \/><br \/>\nAnswer:<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-19604\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-CommonCore-Grade4-Answerkey-Topic2-3.5.png\" alt=\"\" width=\"280\" height=\"154\" \/><\/p>\n<p>Explanation:<br \/>\nThe sum of 148 and 157 is 305.<\/p>\n<p>Question 6.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-9828\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-4th-Grade-Answers-Topic-2-Fluently-Add-and-Subtract-Multi-Digit-Whole-Numbers-37.png\" alt=\"Envision Math Common Core 4th Grade Answers Topic 2 Fluently Add and Subtract Multi-Digit Whole Numbers 37\" width=\"54\" height=\"70\" \/><br \/>\nAnswer:<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-19605\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-CommonCore-Grade4-Answerkey-Topic2-3.6.png\" alt=\"\" width=\"281\" height=\"158\" \/><\/p>\n<p>Explanation:<br \/>\nThe sum of 389 and 461 is 850.<\/p>\n<p>Question 7.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-9829\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-4th-Grade-Answers-Topic-2-Fluently-Add-and-Subtract-Multi-Digit-Whole-Numbers-38.png\" alt=\"Envision Math Common Core 4th Grade Answers Topic 2 Fluently Add and Subtract Multi-Digit Whole Numbers 38\" width=\"59\" height=\"76\" \/><br \/>\nAnswer:<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-19606\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-CommonCore-Grade4-Answerkey-Topic2-3.7.png\" alt=\"\" width=\"267\" height=\"154\" \/><\/p>\n<p>Explanation:<br \/>\nThe sum of 365 and 458 is 823.<\/p>\n<p>Question 8.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-9830\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-4th-Grade-Answers-Topic-2-Fluently-Add-and-Subtract-Multi-Digit-Whole-Numbers-39.png\" alt=\"Envision Math Common Core 4th Grade Answers Topic 2 Fluently Add and Subtract Multi-Digit Whole Numbers 39\" width=\"50\" height=\"83\" \/><br \/>\nAnswer:<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-19607\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-CommonCore-Grade4-Answerkey-Topic2-3.8.png\" alt=\"\" width=\"344\" height=\"333\" \/><\/p>\n<p>Explanation:<br \/>\nThe sum of 126 and 138 is 264.<\/p>\n<p>Question 9.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-9831\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-4th-Grade-Answers-Topic-2-Fluently-Add-and-Subtract-Multi-Digit-Whole-Numbers-40.png\" alt=\"Envision Math Common Core 4th Grade Answers Topic 2 Fluently Add and Subtract Multi-Digit Whole Numbers 40\" width=\"57\" height=\"75\" \/><br \/>\nAnswer:<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-19608\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-CommonCore-Grade4-Answerkey-Topic2-3.9.png\" alt=\"\" width=\"255\" height=\"154\" \/><\/p>\n<p>Explanation:<br \/>\nThe sum of 371 and 454 is 825.<\/p>\n<p>Question 10.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-9832\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-4th-Grade-Answers-Topic-2-Fluently-Add-and-Subtract-Multi-Digit-Whole-Numbers-41.png\" alt=\"Envision Math Common Core 4th Grade Answers Topic 2 Fluently Add and Subtract Multi-Digit Whole Numbers 41\" width=\"58\" height=\"61\" \/><br \/>\nAnswer:<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-19609\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-CommonCore-Grade4-Answerkey-Topic2-3.10.png\" alt=\"\" width=\"263\" height=\"150\" \/><\/p>\n<p>Explanation:<br \/>\nThe sum of 357 and 498 is 855.<\/p>\n<p>Question 11.<br \/>\n142 + 178<br \/>\nAnswer:<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-19610\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-CommonCore-Grade4-Answerkey-Topic2-3.11.png\" alt=\"\" width=\"318\" height=\"336\" \/><\/p>\n<p>Explanation:<br \/>\nThe sum of 142 and 178 is 320.<\/p>\n<p>Question 12.<br \/>\n565 + 694<br \/>\nAnswer:<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-19618\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-CommonCore-Grade4-Answerkey-Topic2-3.12.png\" alt=\"\" width=\"261\" height=\"147\" \/><\/p>\n<p>Explanation:<br \/>\nThe sum of 565 and 694 is 1259.<\/p>\n<p>Question 13.<br \/>\n375 + 548<br \/>\nAnswer:<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-19617\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-CommonCore-Grade4-Answerkey-Topic2-3.13.png\" alt=\"\" width=\"272\" height=\"158\" \/><\/p>\n<p>Explanation:<br \/>\nThe sum of 375 and 548 is 923.<\/p>\n<p>Question 14.<br \/>\n718 + 865<br \/>\nAnswer:<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-19616\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-CommonCore-Grade4-Answerkey-Topic2-3.14.png\" alt=\"\" width=\"267\" height=\"146\" \/><\/p>\n<p>Explanation:<br \/>\nThe sum of 718 and 865 is 1583.<\/p>\n<p>Question 15.<br \/>\n909 + 624<br \/>\nAnswer:<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-19615\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-CommonCore-Grade4-Answerkey-Topic2-3.15.png\" alt=\"\" width=\"279\" height=\"163\" \/><br \/>\nExplanation:<br \/>\nThe sum of 909 and 624 is 1533.<\/p>\n<p>Question 16.<br \/>\n129 + 587<br \/>\nAnswer:<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-19614\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-CommonCore-Grade4-Answerkey-Topic2-3.16.png\" alt=\"\" width=\"263\" height=\"155\" \/><br \/>\nExplanation:<br \/>\nThe sum of 129 and 587 is 716.<\/p>\n<p><strong>Problem Solving<\/strong><\/p>\n<p>Question 17.<br \/>\n<strong>Construct Arguments<\/strong> Harmony solved this problem using the standard algorithm, but she made an error. What was her error, and how can she fix it?<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-9833\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-4th-Grade-Answers-Topic-2-Fluently-Add-and-Subtract-Multi-Digit-Whole-Numbers-42.png\" alt=\"Envision Math Common Core 4th Grade Answers Topic 2 Fluently Add and Subtract Multi-Digit Whole Numbers 42\" width=\"74\" height=\"103\" \/><br \/>\nAnswer:<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-19613\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-CommonCore-Grade4-Answerkey-Topic2-3.17.png\" alt=\"\" width=\"366\" height=\"345\" \/><\/p>\n<p>Explanation:<br \/>\nThe sum of 437 and 175 is 612.<br \/>\nHarmony didnot regroup tens.she should regroup tens and place 1 above the hundreds place to solve the problem.<\/p>\n<p>Question 18.<br \/>\n<strong>Higher Order Thinking<\/strong> For which problems would you use a mental strategy or the standard algorithm to solve? Explain.<br \/>\n499 + 121<br \/>\n827 +385<br \/>\n175 + 325<br \/>\nAnswer:<br \/>\nI use mental strategy to solve 499+121 and 175+325 as the number in hundreds place is small and it is easy to slove mentally, I use standard algorithm to solve 827+385 as the number in hundreds place is big.<\/p>\n<p>Question 19.<br \/>\nA Little League team played a doubleheader (two back-to-back baseball games). The first game lasted 155 minutes. The second game lasted 175 minutes. There was a 30-minute break between games. What was the total time of the doubleheader?<br \/>\nAnswer:<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-19612\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-CommonCore-Grade4-Answerkey-Topic2-3.18.png\" alt=\"\" width=\"484\" height=\"145\" \/><\/p>\n<p>Explanation:<br \/>\nA Little League team played a doubleheader, The first game lasted 155 minutes. The second game lasted 175 minutes. There was a 30-minute break between games.<br \/>\nTo find the total time of the doubleheader we need to add 155, 165 and 30.<br \/>\nThe the total time of the doubleheader is 360.<\/p>\n<p><strong>Assessment Practice<\/strong><\/p>\n<p>Question 20.<br \/>\nSelect all the correct sums.<br \/>\n\u2610 742 + 353 = 1,095<br \/>\n\u2610 428 + 247 = 665<br \/>\n\u2610 604 + 684 = 1,288<br \/>\n\u2610 735 + 298 = 1,033<br \/>\n\u2610 912 + 198 = 1,010<br \/>\nAnswer:<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-19619\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-CommonCore-Grade4-Answerkey-Topic2-3.20.png\" alt=\"\" width=\"194\" height=\"142\" \/><\/p>\n<p>Explanation:<br \/>\nThe marked sums are correct.<\/p>\n<p>Question 21.<br \/>\nWhat is the missing digit in the addition problem?<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-9834\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-4th-Grade-Answers-Topic-2-Fluently-Add-and-Subtract-Multi-Digit-Whole-Numbers-43.png\" alt=\"Envision Math Common Core 4th Grade Answers Topic 2 Fluently Add and Subtract Multi-Digit Whole Numbers 43\" width=\"102\" height=\"96\" \/><br \/>\nAnswer:<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-19611\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-CommonCore-Grade4-Answerkey-Topic2-3.19.png\" alt=\"\" width=\"242\" height=\"217\" \/><\/p>\n<p>Explanation:<br \/>\nTo find the missing number first subtract 1004 and 659, we get 345 as the answer.The missing tens is 4.<\/p>\n<h3>Lesson 2.4 Add Greater Numbers<\/h3>\n<p><strong>Solve &amp; Share<\/strong><br \/>\nErica&#8217;s class collected 4,219 bottles for the recycling center. Ana&#8217;s class collected 3,742 bottles. Leon&#8217;s class collected 4,436 bottles. How many bottles did the three classes collect? Solve this problem any way you choose.<br \/>\nI can &#8230; use the standard algorithm and place value to add multi-digit numbers.<\/p>\n<p><img loading=\"lazy\" class=\"alignnone size-full wp-image-19842\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-CommonCore-Grade4-Answerkey-Topic2-4.22.png\" alt=\"\" width=\"413\" height=\"494\" \/><\/p>\n<p>Look Back! Generalize Which properties allow you to change the order and grouping of numbers to add? How did you use these properties?<\/p>\n<p><strong>Essential Question<\/strong><br \/>\nbaby How Do You Add Greater Numbers?<\/p>\n<p>Visual Learning Bridge<br \/>\nPlans for remodeling a sports stadium include adding an additional 19,255 seats. How many seats will be in the remodeled stadium?<br \/>\nSeats in the original stadium:<br \/>\n20,000 + 4,595 = 24,595<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-9836\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-4th-Grade-Answers-Topic-2-Fluently-Add-and-Subtract-Multi-Digit-Whole-Numbers-45.png\" alt=\"Envision Math Common Core 4th Grade Answers Topic 2 Fluently Add and Subtract Multi-Digit Whole Numbers 45\" width=\"693\" height=\"304\" \/><\/p>\n<p>Step 1<br \/>\nUse the standard algorithm for addition<br \/>\nTo add 24,595 + 19,255, add the ones, then the tens, and then the hundreds. Regroup if necessary<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-9837\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-4th-Grade-Answers-Topic-2-Fluently-Add-and-Subtract-Multi-Digit-Whole-Numbers-46.png\" alt=\"Envision Math Common Core 4th Grade Answers Topic 2 Fluently Add and Subtract Multi-Digit Whole Numbers 46\" width=\"90\" height=\"86\" \/><\/p>\n<p>Step 2<br \/>\nAdd the thousands and the ten thousands. Regroup if necessary.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-9838\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-4th-Grade-Answers-Topic-2-Fluently-Add-and-Subtract-Multi-Digit-Whole-Numbers-47.png\" alt=\"Envision Math Common Core 4th Grade Answers Topic 2 Fluently Add and Subtract Multi-Digit Whole Numbers 47\" width=\"106\" height=\"111\" \/><br \/>\nThe remodeled stadium will have 43,850 seats.<br \/>\nYou can add two or more numbers when you line up the numbers by place value. Add one place at a time.<\/p>\n<p>Step 3<br \/>\nUse an estimate to check if your answer is reasonable.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-9839\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-4th-Grade-Answers-Topic-2-Fluently-Add-and-Subtract-Multi-Digit-Whole-Numbers-48.png\" alt=\"Envision Math Common Core 4th Grade Answers Topic 2 Fluently Add and Subtract Multi-Digit Whole Numbers 48\" width=\"184\" height=\"80\" \/><br \/>\n43,850 is close to the estimate of 44,000, so the answer is reasonable.<\/p>\n<p>Convince Me! Construct Arguments When using the standard algorithm to add 24,595 + 19,255, how do you regroup 1 ten + 9 tens + 5 tens?<\/p>\n<p><strong>Another Example!<\/strong><br \/>\nFind 30,283 + 63,423 + 6,538.<br \/>\nExplain how to check that your answer is reasonable.<br \/>\nEstimate:<br \/>\n30,000 + 63,000 + 7,000 = 100,000<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-9840\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-4th-Grade-Answers-Topic-2-Fluently-Add-and-Subtract-Multi-Digit-Whole-Numbers-49.png\" alt=\"Envision Math Common Core 4th Grade Answers Topic 2 Fluently Add and Subtract Multi-Digit Whole Numbers 49\" width=\"78\" height=\"111\" \/><br \/>\nThe sum is reasonable because it is close to the estimate of 100,000.<\/p>\n<p><strong>Guided Practices<\/strong><\/p>\n<p><strong>Do You Understand?<\/strong><br \/>\nQuestion 1.<br \/>\nWhen adding 36,424 and 24,482, why is there no regrouping in the final step?<br \/>\nAnswer:<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-19815\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-CommonCore-Grade4-Answerkey-Topic2-4.1.png\" alt=\"\" width=\"340\" height=\"354\" \/><\/p>\n<p>Explanation:<br \/>\nWhen 36424 and 24482 are added there is no regrouping in the final step because the sum of the final numbers donot exceed 9.<\/p>\n<p>Question 2.<br \/>\nScience-volunteer teams catalog 7,836 species of insects and 4,922 species of spiders. How many species did the volunteers catalog?<br \/>\nAnswer:<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-19816\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-CommonCore-Grade4-Answerkey-Topic2-4.2.png\" alt=\"\" width=\"326\" height=\"349\" \/><\/p>\n<p>Explanation:<br \/>\n12758 species the volunteers cataloged.<\/p>\n<p><strong>Do You Know How?<\/strong><br \/>\nFor 3-6, find each sum. Check that your answer is reasonable.<br \/>\nQuestion 3.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-9841\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-4th-Grade-Answers-Topic-2-Fluently-Add-and-Subtract-Multi-Digit-Whole-Numbers-50.png\" alt=\"Envision Math Common Core 4th Grade Answers Topic 2 Fluently Add and Subtract Multi-Digit Whole Numbers 50\" width=\"73\" height=\"71\" \/><br \/>\nAnswer:<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-19817\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-CommonCore-Grade4-Answerkey-Topic2-4.3.png\" alt=\"\" width=\"337\" height=\"358\" \/><\/p>\n<p>Explanation:<br \/>\nThe sum of 14926 and 3382 is 18308.Answer is reasonable as the estimate 18000 is close to the answer.<\/p>\n<p>Question 4.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-9842\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-4th-Grade-Answers-Topic-2-Fluently-Add-and-Subtract-Multi-Digit-Whole-Numbers-51.png\" alt=\"Envision Math Common Core 4th Grade Answers Topic 2 Fluently Add and Subtract Multi-Digit Whole Numbers 51\" width=\"87\" height=\"68\" \/><br \/>\nAnswer:<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-19814\" style=\"letter-spacing: 0px;\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-CommonCore-Grade4-Answerkey-Topic2-4.4.png\" alt=\"\" width=\"341\" height=\"353\" \/><\/p>\n<p>Explanation:<br \/>\nThe sum of 423156 and 571607 is 994763.Answer is reasonable as the estimate 99500 is close to the answer.<\/p>\n<p>Question <span style=\"font-size: inherit; letter-spacing: 0px;\">5.<\/span><\/p>\n<p><img loading=\"lazy\" class=\"alignnone size-full wp-image-9843\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-4th-Grade-Answers-Topic-2-Fluently-Add-and-Subtract-Multi-Digit-Whole-Numbers-52.png\" alt=\"Envision Math Common Core 4th Grade Answers Topic 2 Fluently Add and Subtract Multi-Digit Whole Numbers 52\" width=\"70\" height=\"80\" \/><br \/>\nAnswer:<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-19841\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-CommonCore-Grade4-Answerkey-Topic2-4.18.png\" alt=\"\" width=\"320\" height=\"345\" \/><\/p>\n<p>Explanation:<br \/>\nThe sum of 3258 and 1761 is 5019.Answer is reasonable as the estimate 5100 is close to the answer.<\/p>\n<p>Question 6.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-9844\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-4th-Grade-Answers-Topic-2-Fluently-Add-and-Subtract-Multi-Digit-Whole-Numbers-53.png\" alt=\"Envision Math Common Core 4th Grade Answers Topic 2 Fluently Add and Subtract Multi-Digit Whole Numbers 53\" width=\"76\" height=\"81\" \/><br \/>\nAnswer:<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-19840\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-CommonCore-Grade4-Answerkey-Topic2-4.19.png\" alt=\"\" width=\"338\" height=\"339\" \/><\/p>\n<p>Explanation:<br \/>\nThe sum of 82385 and 49817 is 132202.Answer is reasonable as the estimate 132000 is close to the answer.<\/p>\n<p><strong>Independent Practice<\/strong><\/p>\n<p>For 7-16, find each sum. Check that <span style=\"font-size: inherit; letter-spacing: 0px;\">your answer is reasonable.<\/span><\/p>\n<p>Question 7.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-9845\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-4th-Grade-Answers-Topic-2-Fluently-Add-and-Subtract-Multi-Digit-Whole-Numbers-54.png\" alt=\"Envision Math Common Core 4th Grade Answers Topic 2 Fluently Add and Subtract Multi-Digit Whole Numbers 54\" width=\"74\" height=\"77\" \/><br \/>\nAnswer:<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-19839\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-CommonCore-Grade4-Answerkey-Topic2-4.20.png\" alt=\"\" width=\"321\" height=\"338\" \/><\/p>\n<p>Explanation:<br \/>\nThe sum of 14312 and 9617 is 23929.Answer is reasonable as the estimate 24000 is close to the answer.<\/p>\n<p>Question 8.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-9846\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-4th-Grade-Answers-Topic-2-Fluently-Add-and-Subtract-Multi-Digit-Whole-Numbers-55.png\" alt=\"Envision Math Common Core 4th Grade Answers Topic 2 Fluently Add and Subtract Multi-Digit Whole Numbers 55\" width=\"90\" height=\"79\" \/><br \/>\nAnswer:<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-19838\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-CommonCore-Grade4-Answerkey-Topic2-4.21.png\" alt=\"\" width=\"322\" height=\"345\" \/><\/p>\n<p>Explanation:<br \/>\nThe sum of 275558 and 605131 is 880689.Answer is reasonable as the estimate 881000 is close to the answer.<\/p>\n<p>Question 9.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-9847\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-4th-Grade-Answers-Topic-2-Fluently-Add-and-Subtract-Multi-Digit-Whole-Numbers-56.png\" alt=\"Envision Math Common Core 4th Grade Answers Topic 2 Fluently Add and Subtract Multi-Digit Whole Numbers 56\" width=\"76\" height=\"75\" \/><br \/>\nAnswer:<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-19813\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-CommonCore-Grade4-Answerkey-Topic2-4.5.png\" alt=\"\" width=\"342\" height=\"359\" \/><\/p>\n<p>Explanation:<br \/>\nThe sum of 38911 and 45681 is 84592.Answer is reasonable as the estimate 85000 is close to the answer.<\/p>\n<p>Question 10.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-9848\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-4th-Grade-Answers-Topic-2-Fluently-Add-and-Subtract-Multi-Digit-Whole-Numbers-57.png\" alt=\"Envision Math Common Core 4th Grade Answers Topic 2 Fluently Add and Subtract Multi-Digit Whole Numbers 57\" width=\"68\" height=\"68\" \/><br \/>\nAnswer:<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-19812\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-CommonCore-Grade4-Answerkey-Topic2-4.6.png\" alt=\"\" width=\"342\" height=\"359\" \/><\/p>\n<p>Explanation:<br \/>\nThe sum of 5801 and 4189 is 9990.Answer is reasonable as the estimate 10000 is close to the answer.<\/p>\n<p>Question 11.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-9849\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-4th-Grade-Answers-Topic-2-Fluently-Add-and-Subtract-Multi-Digit-Whole-Numbers-58.png\" alt=\"Envision Math Common Core 4th Grade Answers Topic 2 Fluently Add and Subtract Multi-Digit Whole Numbers 58\" width=\"70\" height=\"77\" \/><br \/>\nAnswer:<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-19811\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-CommonCore-Grade4-Answerkey-Topic2-4.7.png\" alt=\"\" width=\"342\" height=\"359\" \/><\/p>\n<p>Explanation:<br \/>\nThe sum of 8818 and 1182 is 10000.Answer is reasonable as the estimate 10000 is close to the answer.<\/p>\n<p>Question 12.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-9850\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-4th-Grade-Answers-Topic-2-Fluently-Add-and-Subtract-Multi-Digit-Whole-Numbers-59.png\" alt=\"Envision Math Common Core 4th Grade Answers Topic 2 Fluently Add and Subtract Multi-Digit Whole Numbers 59\" width=\"64\" height=\"82\" \/><br \/>\nAnswer:<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-19810\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-CommonCore-Grade4-Answerkey-Topic2-4.8.png\" alt=\"\" width=\"342\" height=\"359\" \/><\/p>\n<p>Explanation:<br \/>\nThe sum of 5555 and 7412 is 12967.Answer is reasonable as the estimate 13000 is close to the answer.<\/p>\n<p>Question 13.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-9851\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-4th-Grade-Answers-Topic-2-Fluently-Add-and-Subtract-Multi-Digit-Whole-Numbers-60.png\" alt=\"Envision Math Common Core 4th Grade Answers Topic 2 Fluently Add and Subtract Multi-Digit Whole Numbers 60\" width=\"76\" height=\"75\" \/><br \/>\nAnswer:<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-19809\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-CommonCore-Grade4-Answerkey-Topic2-4.9.png\" alt=\"\" width=\"342\" height=\"359\" \/><\/p>\n<p>Explanation:<br \/>\nThe sum of 21009 and 5529 is 26538.Answer is reasonable as the estimate 26600 is close to the answer.<\/p>\n<p>Question 14.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-9852\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-4th-Grade-Answers-Topic-2-Fluently-Add-and-Subtract-Multi-Digit-Whole-Numbers-61.png\" alt=\"Envision Math Common Core 4th Grade Answers Topic 2 Fluently Add and Subtract Multi-Digit Whole Numbers 61\" width=\"73\" height=\"77\" \/><br \/>\nAnswer:<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-19808\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-CommonCore-Grade4-Answerkey-Topic2-4.10.png\" alt=\"\" width=\"342\" height=\"359\" \/><\/p>\n<p>Explanation:<br \/>\nThe sum of 30080 and 19187 is 49267.Answer is reasonable as the estimate 49000 is close to the answer.<\/p>\n<p>Question 15.<br \/>\n29,634 + 12,958 + 6,835<br \/>\nAnswer:<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-19807\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-CommonCore-Grade4-Answerkey-Topic2-4.11.png\" alt=\"\" width=\"265\" height=\"267\" \/><\/p>\n<p>Explanation:<br \/>\nThe sum of 29634, 12958 and 6835 is 49427.<\/p>\n<p>Question 16.<br \/>\n64,673 + 48,262 + 8,918<br \/>\nAnswer:<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-19806\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-CommonCore-Grade4-Answerkey-Topic2-4.12.png\" alt=\"\" width=\"299\" height=\"263\" \/><\/p>\n<p>Explanation:<br \/>\nThe sum of 64673, 48262 and 8918 is 121853.<\/p>\n<p><strong>Problem Solving<\/strong><\/p>\n<p>Question 17.<br \/>\nAubrey writes a blog. 29,604 people read her first post. The next week, 47,684 people read her second post. Aubrey&#8217;s third post had 41,582 readers. What is the total number of readers?<br \/>\nAnswer:<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-19805\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-CommonCore-Grade4-Answerkey-Topic2-4.13.png\" alt=\"\" width=\"259\" height=\"252\" \/><\/p>\n<p>Explanation:<br \/>\nThe sum of 29604, 47684 and 4152 is 81440.<br \/>\nTherefore the total number of readers are 81440.<\/p>\n<p>Question 18.<br \/>\nWrite the number name for 21,604.<br \/>\nAnswer:<br \/>\nNumber name of 21604 is Twenty one thousand six hundred four.<\/p>\n<p>Question 19.<br \/>\n<strong>Higher Order Thinking<\/strong> Explain the mistake made when finding the sum at the right. What is the correct sum?<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-9853\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-4th-Grade-Answers-Topic-2-Fluently-Add-and-Subtract-Multi-Digit-Whole-Numbers-62.png\" alt=\"Envision Math Common Core 4th Grade Answers Topic 2 Fluently Add and Subtract Multi-Digit Whole Numbers 62\" width=\"185\" height=\"169\" \/><br \/>\nAnswer:<br \/>\nThe correct sum is 872879.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-19804\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-CommonCore-Grade4-Answerkey-Topic2-4.14.png\" alt=\"\" width=\"294\" height=\"211\" \/><\/p>\n<p>Explanation:<br \/>\nThe sum of 638528 and 234351 is 872879.<br \/>\nThe mistake is regrouping 8 and 4 thousands as 1 tensthousand is not done in the given sum.<\/p>\n<p>Question 20.<br \/>\n<strong>Number Sense<\/strong> Maria added 45,273 and 35,687 and got a sum of 70,960. Is Maria&#8217;s answer reasonable? Explain.<br \/>\nAnswer:<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-19843\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-CommonCore-Grade4-Answerkey-Topic2-4.15-1.png\" alt=\"\" width=\"244\" height=\"211\" \/><\/p>\n<p>Explanation:<br \/>\nEstimate:<br \/>\n45273-45000, 35687-36000<br \/>\n45000+36000=81000<br \/>\nThe sum of 45273 and 35687 is 80960.Maria&#8217;s answer is not reasonable as the estimate is not close to the answer.<\/p>\n<p>Question 21.<br \/>\nMake Sense and Persevere There were 130,453 pairs of skates rented at an ice rink in one year. The next year, 108,626 pairs were rented. The following year 178,119 pairs were rented. How many pairs were rented during the busiest two years? How many pairs were rented during all three years?<br \/>\nAnswer:<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-19802\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-CommonCore-Grade4-Answerkey-Topic2-4.16.png\" alt=\"\" width=\"288\" height=\"230\" \/><br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-19801\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-CommonCore-Grade4-Answerkey-Topic2-4.17.png\" alt=\"\" width=\"273\" height=\"263\" \/><\/p>\n<p>Explanation:<br \/>\n308572 pairs were rented during the busiest two years.<br \/>\n417198 pairs were rented during all three years<\/p>\n<p><strong>Assessment Practice<\/strong><\/p>\n<p>Question 22.<br \/>\nSelect all the correct sums.<br \/>\n\u2610 5,742 + 8,353 = 14,095<br \/>\n\u2610 9,428 + 18,247 = 27,665<br \/>\n\u2610 29,604 + 47,684 = 77,288<br \/>\n\u2610 66,288 + 145,280 = 211,568<br \/>\n\u2610 235,912 + 19,847 = 434,382<br \/>\nAnswer:<\/p>\n<p>Question 23.<br \/>\nSelect all the addition expressions that have a sum of 89,405.<br \/>\n\u2610 78,487 + 7,998<br \/>\n\u2610 79,562 + 9,843<br \/>\n\u2610 2,222 + 77,183<br \/>\n\u2610 52,514 + 36,891<br \/>\n\u2610 6,573 + 82,832<br \/>\nAnswer:<\/p>\n<h3>Lesson 2.5 Subtract Whole Numbers<\/h3>\n<p><strong>Solve &amp; Share<\/strong><br \/>\nCarly&#8217;s parents own a motel in Orlando with 224 rooms. Last night, 176 rooms were rented. How many rooms were not rented? Solve this problem using any strategy you choose.<br \/>\nI can &#8230; connect place-value concepts to using the standard algorithm for subtraction<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-9854\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-4th-Grade-Answers-Topic-2-Fluently-Add-and-Subtract-Multi-Digit-Whole-Numbers-63.png\" alt=\"Envision Math Common Core 4th Grade Answers Topic 2 Fluently Add and Subtract Multi-Digit Whole Numbers 63\" width=\"389\" height=\"452\" \/><\/p>\n<p>Look Back! How can you use properties to find the number of rooms not rented?<\/p>\n<p><strong>Essential Question<\/strong><br \/>\nHow Can You Subtract Whole Numbers Efficiently?<\/p>\n<p>Visual Learning Bridge<br \/>\nThe movie theater already sold 172 seats. How many seats are still available?<br \/>\nSubtract 358 &#8211; 172.<br \/>\nEstimate: 400 \u2013 200 = 200<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-9855\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-4th-Grade-Answers-Topic-2-Fluently-Add-and-Subtract-Multi-Digit-Whole-Numbers-64.png\" alt=\"Envision Math Common Core 4th Grade Answers Topic 2 Fluently Add and Subtract Multi-Digit Whole Numbers 64\" width=\"481\" height=\"184\" \/><\/p>\n<p>What You Show<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-9856\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-4th-Grade-Answers-Topic-2-Fluently-Add-and-Subtract-Multi-Digit-Whole-Numbers-65.png\" alt=\"Envision Math Common Core 4th Grade Answers Topic 2 Fluently Add and Subtract Multi-Digit Whole Numbers 65\" width=\"287\" height=\"383\" \/><\/p>\n<p>What You Write<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-9857\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-4th-Grade-Answers-Topic-2-Fluently-Add-and-Subtract-Multi-Digit-Whole-Numbers-66.png\" alt=\"Envision Math Common Core 4th Grade Answers Topic 2 Fluently Add and Subtract Multi-Digit Whole Numbers 66\" width=\"377\" height=\"439\" \/><\/p>\n<p>Convince Me! Use Structure How many times do you need to regroup to subtract 483 \u2013 295? Explain.<\/p>\n<p><strong>Guided Practice<\/strong><\/p>\n<p><strong>Do You Understand?<\/strong><br \/>\nQuestion 1.<br \/>\nTo subtract 859 \u2013 583, how do you regroup 8 hundreds 5 tens?<br \/>\nAnswer:<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-19950\" style=\"letter-spacing: 0px;\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-CommonCore-Grade4-Answerkey-Topic2-5.1.png\" alt=\"\" width=\"393\" height=\"399\" \/><\/p>\n<p>Explanation:<br \/>\nThe difference of 859 and 583 is 276.<br \/>\nI regrouped 8hundreds 5tens as 7hundreds 15tens.<\/p>\n<p>Question 2.<br \/>\nWhat do you need to regroup to subtract 753 \u2013 489 using the standard algorithm?<br \/>\nAnswer:<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-19951\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-CommonCore-Grade4-Answerkey-Topic2-5.24.png\" alt=\"\" width=\"406\" height=\"400\" \/><\/p>\n<p>Explanation:<br \/>\nThe difference of 753 and 489 is 264.<br \/>\nI need to regroup 5tens 3ones and 7hundreds 4tens.<\/p>\n<p><strong>Do You Know How?<\/strong><br \/>\nIn 3-6, subtract. Use an estimate to check that your answer is reasonable.<br \/>\nQuestion 3.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-9858\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-4th-Grade-Answers-Topic-2-Fluently-Add-and-Subtract-Multi-Digit-Whole-Numbers-67.png\" alt=\"Envision Math Common Core 4th Grade Answers Topic 2 Fluently Add and Subtract Multi-Digit Whole Numbers 67\" width=\"55\" height=\"69\" \/><br \/>\nAnswer:<br \/>\nEstimate: 154 &#8212; 150, 89 &#8212; 90<br \/>\n150-90 = 60<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-19949\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-CommonCore-Grade4-Answerkey-Topic2-5.2.png\" alt=\"\" width=\"393\" height=\"278\" \/><br \/>\nExplanation:<br \/>\nThe difference of 154 and 89 is 65.<br \/>\nThe difference 65 is reasonable as it is close to the estimated difference 60.<\/p>\n<p>Question 4.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-9859\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-4th-Grade-Answers-Topic-2-Fluently-Add-and-Subtract-Multi-Digit-Whole-Numbers-68.png\" alt=\"Envision Math Common Core 4th Grade Answers Topic 2 Fluently Add and Subtract Multi-Digit Whole Numbers 68\" width=\"61\" height=\"72\" \/><br \/>\nAnswer:<br \/>\nEstimate: 592 &#8212; 590, 357 &#8212; 360<br \/>\n590-360=230<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-19948\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-CommonCore-Grade4-Answerkey-Topic2-5.3.png\" alt=\"\" width=\"411\" height=\"393\" \/><br \/>\nExplanation:<br \/>\nThe difference of 592 and 357 is 235.<br \/>\nThe difference 235 is reasonable as it is close to the estimated difference 230.<\/p>\n<p>Question 5.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-9860\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-4th-Grade-Answers-Topic-2-Fluently-Add-and-Subtract-Multi-Digit-Whole-Numbers-69.png\" alt=\"Envision Math Common Core 4th Grade Answers Topic 2 Fluently Add and Subtract Multi-Digit Whole Numbers 69\" width=\"51\" height=\"67\" \/><br \/>\nAnswer:<br \/>\nEstimate: 915 &#8212; 920, 288 &#8212; 290<br \/>\n920-290=630<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-19947\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-CommonCore-Grade4-Answerkey-Topic2-5.4.png\" alt=\"\" width=\"419\" height=\"407\" \/><br \/>\nExplanation:<br \/>\nThe difference of 915 and 288 is 627.<br \/>\nThe difference 627 is reasonable as it is close to the estimated difference 630.<\/p>\n<p>Question 6.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-9861\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-4th-Grade-Answers-Topic-2-Fluently-Add-and-Subtract-Multi-Digit-Whole-Numbers-70.png\" alt=\"Envision Math Common Core 4th Grade Answers Topic 2 Fluently Add and Subtract Multi-Digit Whole Numbers 70\" width=\"54\" height=\"66\" \/><br \/>\nAnswer:<br \/>\nEstimate: 743 &#8212; 740, 694 &#8212; 690<br \/>\n740-690=50<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-19946\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-CommonCore-Grade4-Answerkey-Topic2-5.5.png\" alt=\"\" width=\"365\" height=\"395\" \/><br \/>\nExplanation:<br \/>\nThe difference of 743 and 694 is 49.<br \/>\nThe difference 49 is reasonable as it is close to the estimated difference 50.<\/p>\n<p><strong>Independent Practice<\/strong><\/p>\n<p>In 7-18, subtract. Use an estimate to check that your answer is reasonable.<br \/>\nQuestion 7.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-9862\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-Grade-4-Answer-Key-Topic-2-Fluently-Add-and-Subtract-Multi-Digit-Whole-Numbers-71.png\" alt=\"Envision Math Common Core Grade 4 Answer Key Topic 2 Fluently Add and Subtract Multi-Digit Whole Numbers 71\" width=\"68\" height=\"57\" \/><br \/>\nAnswer:<br \/>\nEstimate: 289 &#8212; 290, 145 &#8212; 150<br \/>\n290-150=140<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-19945\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-CommonCore-Grade4-Answerkey-Topic2-5.6.png\" alt=\"\" width=\"389\" height=\"394\" \/><br \/>\nExplanation:<br \/>\nThe difference of 289 and 145 is 144.<br \/>\nThe difference 144 is reasonable as it is close to the estimated difference 140.<\/p>\n<p>Question 8.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-9863\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-Grade-4-Answer-Key-Topic-2-Fluently-Add-and-Subtract-Multi-Digit-Whole-Numbers-72.png\" alt=\"Envision Math Common Core Grade 4 Answer Key Topic 2 Fluently Add and Subtract Multi-Digit Whole Numbers 72\" width=\"63\" height=\"67\" \/><br \/>\nAnswer:<br \/>\nEstimate: 326 &#8212; 330, 184 &#8212; 180<br \/>\n330-180=150<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-19944\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-CommonCore-Grade4-Answerkey-Topic2-5.7.png\" alt=\"\" width=\"405\" height=\"405\" \/><br \/>\nExplanation:<br \/>\nThe difference of 326 and 184 is 142.<br \/>\nThe difference 142 is reasonable as it is close to the estimated difference 150.<\/p>\n<p>Question 9.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-9864\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-Grade-4-Answer-Key-Topic-2-Fluently-Add-and-Subtract-Multi-Digit-Whole-Numbers-73.png\" alt=\"Envision Math Common Core Grade 4 Answer Key Topic 2 Fluently Add and Subtract Multi-Digit Whole Numbers 73\" width=\"53\" height=\"68\" \/><br \/>\nAnswer:<br \/>\nEstimate: 736 &#8212; 740, 218 &#8212; 220<br \/>\n740-220=520<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-19942\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-CommonCore-Grade4-Answerkey-Topic2-5.8.png\" alt=\"\" width=\"395\" height=\"398\" \/><br \/>\nExplanation:<br \/>\nThe difference of 736 and 218 is 518.<br \/>\nThe difference 518 is reasonable as it is close to the estimated difference 520.<\/p>\n<p>Question 10.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-9865\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-Grade-4-Answer-Key-Topic-2-Fluently-Add-and-Subtract-Multi-Digit-Whole-Numbers-74.png\" alt=\"Envision Math Common Core Grade 4 Answer Key Topic 2 Fluently Add and Subtract Multi-Digit Whole Numbers 74\" width=\"60\" height=\"72\" \/><br \/>\nAnswer:<br \/>\nEstimate: 525 &#8212; 530, 267 &#8212; 270<br \/>\n530-270=260<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-19941\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-CommonCore-Grade4-Answerkey-Topic2-5.9.png\" alt=\"\" width=\"400\" height=\"401\" \/><br \/>\nExplanation:<br \/>\nThe difference of 525 and 267 is 258.<br \/>\nThe difference 258 is reasonable as it is close to the estimated difference 250.<\/p>\n<p>Question 11.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-9866\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-Grade-4-Answer-Key-Topic-2-Fluently-Add-and-Subtract-Multi-Digit-Whole-Numbers-75.png\" alt=\"Envision Math Common Core Grade 4 Answer Key Topic 2 Fluently Add and Subtract Multi-Digit Whole Numbers 75\" width=\"57\" height=\"65\" \/><br \/>\nAnswer:<br \/>\nEstimate: 683 &#8212; 680, 295 &#8212; 300<br \/>\n680-300=380<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-19940\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-CommonCore-Grade4-Answerkey-Topic2-5.10.png\" alt=\"\" width=\"405\" height=\"386\" \/><br \/>\nExplanation:<br \/>\nThe difference of 683 and 295 is 388.<br \/>\nThe difference 388 is reasonable as it is close to the estimated difference 380.<\/p>\n<p>Question 12.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-9867\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-Grade-4-Answer-Key-Topic-2-Fluently-Add-and-Subtract-Multi-Digit-Whole-Numbers-76.png\" alt=\"Envision Math Common Core Grade 4 Answer Key Topic 2 Fluently Add and Subtract Multi-Digit Whole Numbers 76\" width=\"60\" height=\"74\" \/><br \/>\nAnswer:<br \/>\nEstimate: 847 &#8212; 850, 387 &#8212; 390<br \/>\n850-390=460<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-19939\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-CommonCore-Grade4-Answerkey-Topic2-5.11.png\" alt=\"\" width=\"403\" height=\"399\" \/><br \/>\nExplanation:<br \/>\nThe difference of 847 and 837 is 460.<br \/>\nThe difference 460 is reasonable as it is close to the estimated difference 460.<\/p>\n<p>Question 13.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-9868\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-Grade-4-Answer-Key-Topic-2-Fluently-Add-and-Subtract-Multi-Digit-Whole-Numbers-77.png\" alt=\"Envision Math Common Core Grade 4 Answer Key Topic 2 Fluently Add and Subtract Multi-Digit Whole Numbers 77\" width=\"56\" height=\"72\" \/><br \/>\nAnswer:<br \/>\nEstimate: 475 &#8212; 480, 98 &#8212; 100<br \/>\n480-100=380<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-19938\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-CommonCore-Grade4-Answerkey-Topic2-5.12.png\" alt=\"\" width=\"415\" height=\"387\" \/><br \/>\nExplanation:<br \/>\nThe difference of 475 and 98 is 377.<br \/>\nThe difference 377 is reasonable as it is close to the estimated difference 380.<\/p>\n<p>Question 14.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-9869\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-Grade-4-Answer-Key-Topic-2-Fluently-Add-and-Subtract-Multi-Digit-Whole-Numbers-78.png\" alt=\"Envision Math Common Core Grade 4 Answer Key Topic 2 Fluently Add and Subtract Multi-Digit Whole Numbers 78\" width=\"62\" height=\"70\" \/><br \/>\nAnswer:<br \/>\nEstimate: 826 &#8212; 830, 184 &#8212; 180<br \/>\n830-180=650<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-19937\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-CommonCore-Grade4-Answerkey-Topic2-5.13.png\" alt=\"\" width=\"394\" height=\"397\" \/><br \/>\nExplanation:<br \/>\nThe difference of 826 and 184 is 642.<br \/>\nThe difference 642 is reasonable as it is close to the estimated difference 650.<\/p>\n<p>Question 15.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-9870\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-Grade-4-Answer-Key-Topic-2-Fluently-Add-and-Subtract-Multi-Digit-Whole-Numbers-79.png\" alt=\"Envision Math Common Core Grade 4 Answer Key Topic 2 Fluently Add and Subtract Multi-Digit Whole Numbers 79\" width=\"55\" height=\"69\" \/><br \/>\nAnswer:<br \/>\nEstimate: 936 &#8212; 940, 218 &#8212; 220<br \/>\n940-220=720<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-19936\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-CommonCore-Grade4-Answerkey-Topic2-5.14.png\" alt=\"\" width=\"426\" height=\"393\" \/><br \/>\nExplanation:<br \/>\nThe difference of 936 and 218 is 718.<br \/>\nThe difference 718 is reasonable as it is close to the estimated difference 720.<\/p>\n<p>Question 16.<br \/>\n167 \u2013 79<br \/>\nAnswer:<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-19935\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-CommonCore-Grade4-Answerkey-Topic2-5.15.png\" alt=\"\" width=\"363\" height=\"257\" \/><\/p>\n<p>Explanation:<br \/>\nThe difference of 167 and 79 is 88.<\/p>\n<p>Question 17.<br \/>\n284 \u2013 167<br \/>\nAnswer:<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-19934\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-CommonCore-Grade4-Answerkey-Topic2-5.16.png\" alt=\"\" width=\"390\" height=\"390\" \/><br \/>\nExplanation:<br \/>\nThe difference of 284 and 167 is 117.<\/p>\n<p>Question 18.<br \/>\n817 \u2013 548<br \/>\nAnswer:<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-19932\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-CommonCore-Grade4-Answerkey-Topic2-5.17.png\" alt=\"\" width=\"412\" height=\"390\" \/><br \/>\nExplanation:<br \/>\nThe difference of 817 and 548 is 269.<\/p>\n<p><strong>Problem Solving<\/strong><\/p>\n<p>Question 19.<br \/>\nHow much greater is the area of Hernando County than Union County?<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-9871\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-Grade-4-Answer-Key-Topic-2-Fluently-Add-and-Subtract-Multi-Digit-Whole-Numbers-80.png\" alt=\"Envision Math Common Core Grade 4 Answer Key Topic 2 Fluently Add and Subtract Multi-Digit Whole Numbers 80\" width=\"367\" height=\"271\" \/><br \/>\nAnswer:<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-19931\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-CommonCore-Grade4-Answerkey-Topic2-5.18.png\" alt=\"\" width=\"397\" height=\"388\" \/><br \/>\nExplanation:<br \/>\nThe difference of 473 and 244 is 229.<br \/>\nTherefore, the area of Hernando County is 229squaremiles than Union County.<\/p>\n<p>Question 20.<br \/>\nMake Sense and Persevere How much greater is the area of Monroe County than the area of Union County and Hernando County combined? Explain.<br \/>\nAnswer:<br \/>\nThe area of union country and hernando country combines is 719sqmiles<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-19930\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-CommonCore-Grade4-Answerkey-Topic2-5.19.1.png\" alt=\"\" width=\"173\" height=\"203\" \/><br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-19929\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-CommonCore-Grade4-Answerkey-Topic2-5.19.png\" alt=\"\" width=\"395\" height=\"401\" \/><br \/>\nExplanation:<br \/>\nThe difference of 983 and 719 is 264.<br \/>\nTherefore, the area of Monroe County is 264sqmiles greater than the area of Union County and Hernando County combined.<\/p>\n<p>Question 21.<br \/>\nPopulation density is measured in people per square mile. It indicates how crowded an area is. How many more people per square mile does Brevard County have than neighboring Volusia County?<br \/>\nAnswer:<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-19928\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-CommonCore-Grade4-Answerkey-Topic2-5.20.png\" alt=\"\" width=\"406\" height=\"406\" \/><\/p>\n<p>Explanation:<br \/>\nThe difference of 535 and 449 is 86.<br \/>\nTherefore, Brevard County have 86more people per square mile than neighboring Volusia County .<\/p>\n<p>Question 22.<br \/>\n<strong>Higher Order Thinking<\/strong> What mistake did Leon make? What is the correct difference?<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-9872\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-Grade-4-Answer-Key-Topic-2-Fluently-Add-and-Subtract-Multi-Digit-Whole-Numbers-81.png\" alt=\"Envision Math Common Core Grade 4 Answer Key Topic 2 Fluently Add and Subtract Multi-Digit Whole Numbers 81\" width=\"326\" height=\"196\" \/><br \/>\nAnswer:<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-19927\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-CommonCore-Grade4-Answerkey-Topic2-5.21.png\" alt=\"\" width=\"402\" height=\"397\" \/><br \/>\nExplanation:<br \/>\nThe difference of 793 and 576 is 217.<br \/>\nThe correct difference is 217,The mistake made by leon is he unnecessarily regrouped hundreds.to find the differene of the above numbers their is no need of regrouping hundreds.<\/p>\n<p><strong>Assessment Practice<\/strong><\/p>\n<p>Question 23.<br \/>\nWhat is the difference?<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-9873\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-Grade-4-Answer-Key-Topic-2-Fluently-Add-and-Subtract-Multi-Digit-Whole-Numbers-82.png\" alt=\"Envision Math Common Core Grade 4 Answer Key Topic 2 Fluently Add and Subtract Multi-Digit Whole Numbers 82\" width=\"63\" height=\"66\" \/><br \/>\nA. 1,183<br \/>\nB. 335<br \/>\nC. 266<br \/>\nD. 265<br \/>\nAnswer:<br \/>\nD.265.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-19926\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-CommonCore-Grade4-Answerkey-Topic2-5.22.png\" alt=\"\" width=\"412\" height=\"395\" \/><br \/>\nExplanation:<br \/>\nThe difference of 724 and 459 is 265.<\/p>\n<p>Question 24.<br \/>\nWhat is the missing digit in the subtraction statement?<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-9874\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-Grade-4-Answer-Key-Topic-2-Fluently-Add-and-Subtract-Multi-Digit-Whole-Numbers-83.png\" alt=\"Envision Math Common Core Grade 4 Answer Key Topic 2 Fluently Add and Subtract Multi-Digit Whole Numbers 83\" width=\"74\" height=\"93\" \/><br \/>\nAnswer:<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-19925\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-CommonCore-Grade4-Answerkey-Topic2-5.23.png\" alt=\"\" width=\"408\" height=\"393\" \/><br \/>\nExplanation:<br \/>\nThe difference of 634 and 297 is 337.<br \/>\nTherefore, the missing number in the subtraction statement is 9.<\/p>\n<h3>Lesson 2.6 Subtract Greater Numbers<\/h3>\n<p><strong>Solve &amp; Share<\/strong><br \/>\nNevada has a land area of 109,781 square miles. Colorado has a land area of 103,642 square miles. How much larger is Nevada than Colorado? Solve this problem any way you choose.<br \/>\nI can &#8230; use the standard algorithm and place value to subtract whole numbers.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-9875\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-Grade-4-Answer-Key-Topic-2-Fluently-Add-and-Subtract-Multi-Digit-Whole-Numbers-84.png\" alt=\"Envision Math Common Core Grade 4 Answer Key Topic 2 Fluently Add and Subtract Multi-Digit Whole Numbers 84\" width=\"391\" height=\"480\" \/><\/p>\n<p>Look Back! Estimate the difference in the areas of the two states. Is your answer close to this estimate?<\/p>\n<p><strong>Essential Question<\/strong><br \/>\nHow Do You Subtract Greater Numbers Efficiently?<\/p>\n<p>Visual Learning Bridge<br \/>\nThree of the country&#8217;s most scenic national parks are in Alaska. How much larger is the area of Gates of the Arctic than the combined area of Denali and Kenai Fjords?<br \/>\nFind the total area of Denali and Kenai Fjords.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-9876\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-Grade-4-Answer-Key-Topic-2-Fluently-Add-and-Subtract-Multi-Digit-Whole-Numbers-85.png\" alt=\"Envision Math Common Core Grade 4 Answer Key Topic 2 Fluently Add and Subtract Multi-Digit Whole Numbers 85\" width=\"669\" height=\"408\" \/><\/p>\n<p>Step 1<br \/>\nFind 34,287 \u2013 21,893.<br \/>\nSubtract the ones. Regroup if necessary<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-9877\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-Grade-4-Answer-Key-Topic-2-Fluently-Add-and-Subtract-Multi-Digit-Whole-Numbers-86.png\" alt=\"Envision Math Common Core Grade 4 Answer Key Topic 2 Fluently Add and Subtract Multi-Digit Whole Numbers 86\" width=\"91\" height=\"88\" \/><\/p>\n<p>Step 2<br \/>\nSubtract the tens, hundreds, thousands, and ten thousands.<br \/>\nRegroup if necessary<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-9878\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-Grade-4-Answer-Key-Topic-2-Fluently-Add-and-Subtract-Multi-Digit-Whole-Numbers-87.png\" alt=\"Envision Math Common Core Grade 4 Answer Key Topic 2 Fluently Add and Subtract Multi-Digit Whole Numbers 87\" width=\"91\" height=\"76\" \/><br \/>\nGates of the Arctic is 12,396 square kilometers larger.<\/p>\n<p>Step 3<br \/>\nOperations that undo each other are inverse operations. Addition and subtraction have an inverse relationship. Add to check your answer.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-9879\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-Grade-4-Answer-Key-Topic-2-Fluently-Add-and-Subtract-Multi-Digit-Whole-Numbers-88.png\" alt=\"Envision Math Common Core Grade 4 Answer Key Topic 2 Fluently Add and Subtract Multi-Digit Whole Numbers 88\" width=\"91\" height=\"78\" \/><\/p>\n<p>Convince Me! Critique Reasoning The work shown is NOT correct. What errors were made? Show how to find the correct answer.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-9880\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-Grade-4-Answer-Key-Topic-2-Fluently-Add-and-Subtract-Multi-Digit-Whole-Numbers-89.png\" alt=\"Envision Math Common Core Grade 4 Answer Key Topic 2 Fluently Add and Subtract Multi-Digit Whole Numbers 89\" width=\"84\" height=\"93\" \/><\/p>\n<p><strong>Another Example!<\/strong><br \/>\nFind 38,792. \u2013 33,215.<br \/>\nEstimate:<br \/>\n39,000 \u2013 33,000 = 6,000<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-9881\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-Grade-4-Answer-Key-Topic-2-Fluently-Add-and-Subtract-Multi-Digit-Whole-Numbers-90.png\" alt=\"Envision Math Common Core Grade 4 Answer Key Topic 2 Fluently Add and Subtract Multi-Digit Whole Numbers 90\" width=\"462\" height=\"118\" \/><\/p>\n<p><strong>Guided Practice<\/strong><\/p>\n<p><strong>Do You Understand?<\/strong><br \/>\nQuestion 1.<br \/>\nIn the subtraction problem above, why was the zero in the ten thousands place not written in the answer?<br \/>\nAnswer:<\/p>\n<p>Question 2.<br \/>\nThe total land area of New Jersey is 19,047 square kilometers. Write and solve an equation to show how to find how much more land area Gates of the Arctic has than New Jersey.<br \/>\nAnswer:<br \/>\n34287-19407 sqkm = 14880 sqkm<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-20114\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-CommonCore-Grade4-Answerkey-Topic2-6.22.png\" alt=\"\" width=\"244\" height=\"308\" \/><\/p>\n<p>Explanation:<br \/>\nThe Gates of the Arctic has 14880sqkilometers more land area than New Jersey.<\/p>\n<p><strong>Do You Know How?<\/strong><br \/>\nFor 3-6, subtract. Estimate to check whether your answers are reasonable.<br \/>\nQuestion 3.<br \/>\n139,484 \u2013 116,691<br \/>\nAnswer:<br \/>\nEstimate: 140000-120000=20000<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-20113\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-CommonCore-Grade4-Answerkey-Topic2-6.1.png\" alt=\"\" width=\"240\" height=\"307\" \/><\/p>\n<p>Explanation:<br \/>\nThe difference of 139484 and 116691 is 22793.<br \/>\nThe difference 22793 is reasonable as it is close to the estimate 20000.<\/p>\n<p>Question 4.<br \/>\n2,164 \u2013 1,398<br \/>\nAnswer:<br \/>\nEstimate:2200-1400=800<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-20112\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-CommonCore-Grade4-Answerkey-Topic2-6.2.png\" alt=\"\" width=\"240\" height=\"307\" \/><\/p>\n<p>Explanation:<br \/>\nThe difference of 2164 and 1398 is 766.<br \/>\nThe difference 766 is reasonable as it is close to the estimate 800.<\/p>\n<p>Question 5.<br \/>\n49,735 \u2013 25,276<br \/>\nAnswer:<br \/>\nEstimate: 50000-25000=25000<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-20110\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-CommonCore-Grade4-Answerkey-Topic2-6.3.png\" alt=\"\" width=\"240\" height=\"307\" \/><\/p>\n<p>Explanation:<br \/>\nThe difference of 49735 and 25276 is 24459.<br \/>\nThe difference 24459 is reasonable as it is close to the estimate 25000.<\/p>\n<p>Question 6.<br \/>\n281,311 \u2013 3,427<br \/>\nAnswer:<br \/>\nEstimate: 281000-3000=278000<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-20109\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-CommonCore-Grade4-Answerkey-Topic2-6.4.png\" alt=\"\" width=\"240\" height=\"307\" \/><\/p>\n<p>Explanation:<br \/>\nThe difference of 281311 and 3427 is 277884.<br \/>\nThe difference 277884 is reasonable as it is close to the estimate 280000.<\/p>\n<p><strong>Independent Practice<\/strong><\/p>\n<p>For 7-14, subtract. Estimate to check if your answers are reasonable.<br \/>\nQuestion 7.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-9882\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-Grade-4-Answer-Key-Topic-2-Fluently-Add-and-Subtract-Multi-Digit-Whole-Numbers-91.png\" alt=\"Envision Math Common Core Grade 4 Answer Key Topic 2 Fluently Add and Subtract Multi-Digit Whole Numbers 91\" width=\"78\" height=\"78\" \/><br \/>\nAnswer:<br \/>\nEstimate: 82000-47000=35000<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-20108\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-CommonCore-Grade4-Answerkey-Topic2-6.5.png\" alt=\"\" width=\"240\" height=\"307\" \/><\/p>\n<p>Explanation:<br \/>\nThe difference of 82376 and 47294 is 35082.<br \/>\nThe difference 35082 is reasonable as it is close to the estimate 35000.<\/p>\n<p>Question 8.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-9883\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-Grade-4-Answer-Key-Topic-2-Fluently-Add-and-Subtract-Multi-Digit-Whole-Numbers-92.png\" alt=\"Envision Math Common Core Grade 4 Answer Key Topic 2 Fluently Add and Subtract Multi-Digit Whole Numbers 92\" width=\"81\" height=\"75\" \/><br \/>\nAnswer:<br \/>\nEstimate: 654000-562000=92000<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-20107\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-CommonCore-Grade4-Answerkey-Topic2-6.6.png\" alt=\"\" width=\"240\" height=\"307\" \/><\/p>\n<p>Explanation:<br \/>\nThe difference of 653642 and 562410 is 91232<br \/>\nThe difference 91232 is reasonable as it is close to the estimate 92000.<\/p>\n<p>Question 9.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-9884\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-Grade-4-Answer-Key-Topic-2-Fluently-Add-and-Subtract-Multi-Digit-Whole-Numbers-93.png\" alt=\"Envision Math Common Core Grade 4 Answer Key Topic 2 Fluently Add and Subtract Multi-Digit Whole Numbers 93\" width=\"72\" height=\"70\" \/><br \/>\nAnswer:<br \/>\nEstimate: 9000-4000=5000<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-20106\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-CommonCore-Grade4-Answerkey-Topic2-6.7.png\" alt=\"\" width=\"240\" height=\"307\" \/><\/p>\n<p>Explanation:<br \/>\nThe difference of 9128 and 3753 is 5375<br \/>\nThe difference 5375 is reasonable as it is close to the estimate 5000.<\/p>\n<p>Question 10.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-9885\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-Grade-4-Answer-Key-Topic-2-Fluently-Add-and-Subtract-Multi-Digit-Whole-Numbers-94.png\" alt=\"Envision Math Common Core Grade 4 Answer Key Topic 2 Fluently Add and Subtract Multi-Digit Whole Numbers 94\" width=\"79\" height=\"75\" \/><br \/>\nAnswer:<br \/>\nEstimate: 43000-8000=35000<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-20105\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-CommonCore-Grade4-Answerkey-Topic2-6.8.png\" alt=\"\" width=\"240\" height=\"307\" \/><\/p>\n<p>Explanation:<br \/>\nThe difference of 42648 and 8169 is 34479<br \/>\nThe difference 34479 is reasonable as it is close to the estimate 35000.<\/p>\n<p>Question 11.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-9886\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-Grade-4-Answer-Key-Topic-2-Fluently-Add-and-Subtract-Multi-Digit-Whole-Numbers-95.png\" alt=\"Envision Math Common Core Grade 4 Answer Key Topic 2 Fluently Add and Subtract Multi-Digit Whole Numbers 95\" width=\"94\" height=\"78\" \/><br \/>\nAnswer:<br \/>\nEstimate: 426000-87000=339000<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-20104\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-CommonCore-Grade4-Answerkey-Topic2-6.9.png\" alt=\"\" width=\"240\" height=\"307\" \/><\/p>\n<p>Explanation:<br \/>\nThe difference of 425637 and 86942 is 338695<br \/>\nThe difference 338695 is reasonable as it is close to the estimate 339000.<\/p>\n<p>Question 12.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-9887\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-Grade-4-Answer-Key-Topic-2-Fluently-Add-and-Subtract-Multi-Digit-Whole-Numbers-96.png\" alt=\"Envision Math Common Core Grade 4 Answer Key Topic 2 Fluently Add and Subtract Multi-Digit Whole Numbers 96\" width=\"72\" height=\"62\" \/><br \/>\nAnswer:<br \/>\nEstimate: 8500-2000=6500<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-20103\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-CommonCore-Grade4-Answerkey-Topic2-6.10.png\" alt=\"\" width=\"240\" height=\"307\" \/><br \/>\nExplanation:<br \/>\nThe difference of 8457 and 1946 is 6511<br \/>\nThe difference 6511 is reasonable as it is close to the estimate 6500.<\/p>\n<p>Question 13.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-9888\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-Grade-4-Answer-Key-Topic-2-Fluently-Add-and-Subtract-Multi-Digit-Whole-Numbers-97.png\" alt=\"Envision Math Common Core Grade 4 Answer Key Topic 2 Fluently Add and Subtract Multi-Digit Whole Numbers 97\" width=\"94\" height=\"79\" \/><br \/>\nAnswer:<br \/>\nEstimate: 216000-176000=40000.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-20102\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-CommonCore-Grade4-Answerkey-Topic2-6.11.png\" alt=\"\" width=\"240\" height=\"307\" \/><\/p>\n<p>Explanation:<br \/>\nThe difference of 215714 and 176313 is 39401<br \/>\nThe difference 39401 is reasonable as it is close to the estimate 40000.<\/p>\n<p>Question 14.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-9889\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-Grade-4-Answer-Key-Topic-2-Fluently-Add-and-Subtract-Multi-Digit-Whole-Numbers-98.png\" alt=\"Envision Math Common Core Grade 4 Answer Key Topic 2 Fluently Add and Subtract Multi-Digit Whole Numbers 98\" width=\"79\" height=\"75\" \/><br \/>\nAnswer:<br \/>\nEstimate: 86000-74000=12000<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-20099\" style=\"letter-spacing: 0px;\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-CommonCore-Grade4-Answerkey-Topic2-6.12.png\" alt=\"\" width=\"240\" height=\"307\" \/><\/p>\n<p>Explanation:<br \/>\nThe difference of 85968 and 74084 is 11884<br \/>\nThe difference 11884 is reasonable as it is close to the estimate 12000.<\/p>\n<p><strong>Problem Solving<\/strong><\/p>\n<p>Question 15.<br \/>\n<strong>Reasoning<\/strong> A crayon company makes 87,491 blue crayons, 36,262 red crayons, and 25,063 gray crayons. How many more blue crayons are made than red and gray crayons combined?<br \/>\nAnswer:<br \/>\nThere are 61325 red and gray crayons combined<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-20101\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-CommonCore-Grade4-Answerkey-Topic2-6.13.png\" alt=\"\" width=\"242\" height=\"200\" \/><br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-20100\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-CommonCore-Grade4-Answerkey-Topic2-6.15.png\" alt=\"\" width=\"240\" height=\"307\" \/><br \/>\nExplanation:<br \/>\nThe difference of 87491 and 61325 is 26166.<br \/>\nTherefore there are 26166 blur crayons are made more than red and grey crayons.<\/p>\n<p>Question 16.<br \/>\n<strong>Number Sense<\/strong> Patrick subtracted 4,832 &#8211; 2,322 and got 2,510. Is his difference reasonable? Explain.<br \/>\nAnswer:<br \/>\nYes, Patrick&#8217;s answer is reasonable.<\/p>\n<p>Explanation:<br \/>\nEstimate: 4800-2300=2500<br \/>\nThe difference 2510 is reasonable as it is close to estimate 2500.<\/p>\n<p>Question 17.<br \/>\n<strong>Higher Order Thinking<\/strong> Nadia found 9,476 \u2013 8,185 using the algorithm shown. Show how to find 1,784 \u2013 1,339 with Nadia&#8217;s algorithm.<br \/>\n9,476 \u2013 8,185 = 1,000 + 300 \u2013 10 + 1<br \/>\n= 1,291<br \/>\nAnswer:<br \/>\n1784-1339 = 500-100+40+5<\/p>\n<p>Explanation:<br \/>\nUsing Nadia&#8217;s algorithm i shown the difference 1784 and 1339 by adding and subtracting numbers.<\/p>\n<p>Question 18.<br \/>\nHow many more people attended the street fair in 2019 than in 2017 and 2018 combined?<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-9890\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-Grade-4-Answer-Key-Topic-2-Fluently-Add-and-Subtract-Multi-Digit-Whole-Numbers-99.png\" alt=\"Envision Math Common Core Grade 4 Answer Key Topic 2 Fluently Add and Subtract Multi-Digit Whole Numbers 99\" width=\"275\" height=\"126\" \/><br \/>\nAnswer:<br \/>\n193301 people attended the street fair in 2017 and 2018 combined<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-20098\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-CommonCore-Grade4-Answerkey-Topic2-6.16.png\" alt=\"\" width=\"271\" height=\"200\" \/><br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-20097\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-CommonCore-Grade4-Answerkey-Topic2-6.17.png\" alt=\"\" width=\"240\" height=\"307\" \/><\/p>\n<p>Explanation:<br \/>\nThe difference of 362839 and 169538 is 169538.<br \/>\nTherefore, 169538 more people attended the street fair in 2019 than in 2017 and 2018 combined.<\/p>\n<p>Question 19.<br \/>\nOn Monday, from the peak of Mount Kilimanjaro, a group of mountain climbers descended 3,499 feet. On Tuesday, they descended another 5,262 feet. How many feet did the mountain climbers descend after 2 days? How many more feet do they have to descend to reach the bottom?<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-9891\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-Grade-4-Answer-Key-Topic-2-Fluently-Add-and-Subtract-Multi-Digit-Whole-Numbers-100.png\" alt=\"Envision Math Common Core Grade 4 Answer Key Topic 2 Fluently Add and Subtract Multi-Digit Whole Numbers 100\" width=\"315\" height=\"208\" \/><br \/>\nAnswer:<br \/>\n8761 feet the mountain climbers descend after 2 days<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-20096\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-CommonCore-Grade4-Answerkey-Topic2-6.18.png\" alt=\"\" width=\"213\" height=\"219\" \/><br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-20095\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-CommonCore-Grade4-Answerkey-Topic2-6.19.png\" alt=\"\" width=\"240\" height=\"307\" \/><\/p>\n<p>Explanation:<br \/>\nThe difference of 19341 and 8761 is 10580.<br \/>\n10580 feet they have to descend to reach the bottom.<\/p>\n<p><strong>Assessment Practice<\/strong><\/p>\n<p>Question 20.<br \/>\nWhat is the missing digit in the subtraction statement?<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-9892\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-Grade-4-Answer-Key-Topic-2-Fluently-Add-and-Subtract-Multi-Digit-Whole-Numbers-101.png\" alt=\"Envision Math Common Core Grade 4 Answer Key Topic 2 Fluently Add and Subtract Multi-Digit Whole Numbers 101\" width=\"313\" height=\"108\" \/><br \/>\nAnswer:<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-20115\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-CommonCore-Grade4-Answerkey-Topic2-6.23.png\" alt=\"\" width=\"313\" height=\"108\" \/><br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-20094\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-CommonCore-Grade4-Answerkey-Topic2-6.20-1.png\" alt=\"\" width=\"261\" height=\"318\" \/><br \/>\nExplanation:<br \/>\nThe difference of 365928 and 187669 is 178259.<br \/>\nSo, the missing digit in the number 178259 in the above question is 8.<\/p>\n<p>Question 21.<br \/>\nWhat is the difference 62,179 \u2013 31,211?<br \/>\nA. 31,968<br \/>\nB. 30,986<br \/>\nC. 30,968<br \/>\nD. 30,000<br \/>\nAnswer:<br \/>\nC.30968<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-20033\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-CommonCore-Grade4-Answerkey-Topic2-6.21.png\" alt=\"\" width=\"229\" height=\"307\" \/><br \/>\nExplanation:<br \/>\nThe difference of 62179 and 31211 is 30968.<\/p>\n<h3>Lesson 2.7 Subtract Across Zeros<\/h3>\n<p><strong>Solve &amp; Share<\/strong><br \/>\nLondon, England, is 15,710 kilometers from the South Pole. Tokyo, Japan, is 13,953 kilometers from the South Pole. How much farther is London than Tokyo from the South Pole? Solve this problem any way you choose.<br \/>\nI can &#8230; use the standard algorithm to subtract from numbers with zeros.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-9893\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-Grade-4-Answer-Key-Topic-2-Fluently-Add-and-Subtract-Multi-Digit-Whole-Numbers-102.png\" alt=\"Envision Math Common Core Grade 4 Answer Key Topic 2 Fluently Add and Subtract Multi-Digit Whole Numbers 102\" width=\"424\" height=\"479\" \/><\/p>\n<p>Look Back! Explain how you decided what operation to use to find how much farther London is than Tokyo from the South Pole.<\/p>\n<p><strong>Essential Question<\/strong><br \/>\nHow Do You Subtract Across Zeros?<\/p>\n<p>Visual Learning Bridge<br \/>\nA music hall is hosting a concert. The hall sells 4,678 tickets to the show. How many tickets are still available?<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-9894\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-Grade-4-Answer-Key-Topic-2-Fluently-Add-and-Subtract-Multi-Digit-Whole-Numbers-103.png\" alt=\"Envision Math Common Core Grade 4 Answer Key Topic 2 Fluently Add and Subtract Multi-Digit Whole Numbers 103\" width=\"658\" height=\"314\" \/><\/p>\n<p>Regroup.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-9895\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-Grade-4-Answer-Key-Topic-2-Fluently-Add-and-Subtract-Multi-Digit-Whole-Numbers-104.png\" alt=\"Envision Math Common Core Grade 4 Answer Key Topic 2 Fluently Add and Subtract Multi-Digit Whole Numbers 104\" width=\"350\" height=\"273\" \/><\/p>\n<p>Subtract.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-9896\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-Grade-4-Answer-Key-Topic-2-Fluently-Add-and-Subtract-Multi-Digit-Whole-Numbers-105.png\" alt=\"Envision Math Common Core Grade 4 Answer Key Topic 2 Fluently Add and Subtract Multi-Digit Whole Numbers 105\" width=\"253\" height=\"143\" \/><br \/>\nSince the difference 1,322 is close to the estimate 1,300, the difference is reasonable.<br \/>\nThere are still 1,322 tickets available for the concert.<\/p>\n<p>Convince Me! Use Structure How would you regroup if the hall had 5,900 seats?<\/p>\n<p><strong>Guided Practice<\/strong><\/p>\n<p><strong>Do You Understand?<\/strong><br \/>\nQuestion 1.<br \/>\nLeesa used compensation to solve the problem on the previous page. She subtracted (6,000 \u2013 1) \u2013 (4,678 \u2013 1) = 5,999 \u2013 4,677 = 1,322. How could you use Leesa&#8217;s approach to subtract 5,000 \u2013 1,476?<br \/>\nAnswer:<br \/>\n3524<\/p>\n<p>Explanation:<br \/>\nUsing Leesa&#8217;s approach we can solve 5000-1476 by subrtacting 1 from both the numbers as shown below<br \/>\n=(5000-1)-(1476-1)<br \/>\n=4999-1475<br \/>\n=3524<br \/>\nTherefore, the difference of 5000 and 1476 is 3524.<\/p>\n<p>Question 2.<br \/>\nOne passenger flew 11,033 kilometers from Oslo to Lima. Another passenger flew 8,593 kilometers from Oslo to Los Angeles. How many more kilometers was the flight to Lima?<br \/>\nAnswer:<\/p>\n<p><strong>Do You Know How?<\/strong><br \/>\nFor 3-8, subtract.<br \/>\nQuestion 3.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-9897\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-Grade-4-Answer-Key-Topic-2-Fluently-Add-and-Subtract-Multi-Digit-Whole-Numbers-106.png\" alt=\"Envision Math Common Core Grade 4 Answer Key Topic 2 Fluently Add and Subtract Multi-Digit Whole Numbers 106\" width=\"71\" height=\"69\" \/><br \/>\nAnswer:<\/p>\n<p>Question 4.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-9898\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-Grade-4-Answer-Key-Topic-2-Fluently-Add-and-Subtract-Multi-Digit-Whole-Numbers-107.png\" alt=\"Envision Math Common Core Grade 4 Answer Key Topic 2 Fluently Add and Subtract Multi-Digit Whole Numbers 107\" width=\"87\" height=\"72\" \/><br \/>\nAnswer:<\/p>\n<p>Question 5.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-9899\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-Grade-4-Answer-Key-Topic-2-Fluently-Add-and-Subtract-Multi-Digit-Whole-Numbers-108.png\" alt=\"Envision Math Common Core Grade 4 Answer Key Topic 2 Fluently Add and Subtract Multi-Digit Whole Numbers 108\" width=\"79\" height=\"74\" \/><br \/>\nAnswer:<\/p>\n<p>Question 6.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-9900\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-Grade-4-Answer-Key-Topic-2-Fluently-Add-and-Subtract-Multi-Digit-Whole-Numbers-109.png\" alt=\"Envision Math Common Core Grade 4 Answer Key Topic 2 Fluently Add and Subtract Multi-Digit Whole Numbers 109\" width=\"76\" height=\"79\" \/><br \/>\nAnswer:<\/p>\n<p>Question 7.<br \/>\n101,001 &#8211; 8,915<br \/>\nAnswer:<\/p>\n<p>Question 8.<br \/>\n9,050 \u2013 3,461<br \/>\nAnswer:<\/p>\n<p><strong>Independent Practice<\/strong><\/p>\n<p>For 9-23, subtract.<br \/>\nEstimate to check if your answer is reasonable.<br \/>\nQuestion 9.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-9901\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-Grade-4-Answer-Key-Topic-2-Fluently-Add-and-Subtract-Multi-Digit-Whole-Numbers-110.png\" alt=\"Envision Math Common Core Grade 4 Answer Key Topic 2 Fluently Add and Subtract Multi-Digit Whole Numbers 110\" width=\"66\" height=\"83\" \/><br \/>\nAnswer:<\/p>\n<p>Question 10.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-9902\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-Grade-4-Answers-Topic-2-Fluently-Add-and-Subtract-Multi-Digit-Whole-Numbers-111.png\" alt=\"Envision Math Common Core Grade 4 Answers Topic 2 Fluently Add and Subtract Multi-Digit Whole Numbers 111\" width=\"71\" height=\"77\" \/><br \/>\nAnswer:<\/p>\n<p>Question 11.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-9903\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-Grade-4-Answers-Topic-2-Fluently-Add-and-Subtract-Multi-Digit-Whole-Numbers-112.png\" alt=\"Envision Math Common Core Grade 4 Answers Topic 2 Fluently Add and Subtract Multi-Digit Whole Numbers 112\" width=\"78\" height=\"79\" \/><br \/>\nAnswer:<\/p>\n<p>Question 12.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-9904\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-Grade-4-Answers-Topic-2-Fluently-Add-and-Subtract-Multi-Digit-Whole-Numbers-113.png\" alt=\"Envision Math Common Core Grade 4 Answers Topic 2 Fluently Add and Subtract Multi-Digit Whole Numbers 113\" width=\"89\" height=\"76\" \/><br \/>\nAnswer:<\/p>\n<p>Question 13.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-9905\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-Grade-4-Answers-Topic-2-Fluently-Add-and-Subtract-Multi-Digit-Whole-Numbers-114.png\" alt=\"Envision Math Common Core Grade 4 Answers Topic 2 Fluently Add and Subtract Multi-Digit Whole Numbers 114\" width=\"73\" height=\"72\" \/><br \/>\nAnswer:<\/p>\n<p>Question 14.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-9906\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-Grade-4-Answers-Topic-2-Fluently-Add-and-Subtract-Multi-Digit-Whole-Numbers-115.png\" alt=\"Envision Math Common Core Grade 4 Answers Topic 2 Fluently Add and Subtract Multi-Digit Whole Numbers 115\" width=\"80\" height=\"76\" \/><br \/>\nAnswer:<\/p>\n<p>Question 15.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-9907\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-Grade-4-Answers-Topic-2-Fluently-Add-and-Subtract-Multi-Digit-Whole-Numbers-116.png\" alt=\"Envision Math Common Core Grade 4 Answers Topic 2 Fluently Add and Subtract Multi-Digit Whole Numbers 116\" width=\"79\" height=\"75\" \/><br \/>\nAnswer:<\/p>\n<p>Question 16.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-9908\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-Grade-4-Answers-Topic-2-Fluently-Add-and-Subtract-Multi-Digit-Whole-Numbers-117.png\" alt=\"Envision Math Common Core Grade 4 Answers Topic 2 Fluently Add and Subtract Multi-Digit Whole Numbers 117\" width=\"73\" height=\"80\" \/><br \/>\nAnswer:<\/p>\n<p>Question 17.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-9909\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-Grade-4-Answers-Topic-2-Fluently-Add-and-Subtract-Multi-Digit-Whole-Numbers-118.png\" alt=\"Envision Math Common Core Grade 4 Answers Topic 2 Fluently Add and Subtract Multi-Digit Whole Numbers 118\" width=\"67\" height=\"74\" \/><br \/>\nAnswer:<\/p>\n<p>Question 18.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-9910\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-Grade-4-Answers-Topic-2-Fluently-Add-and-Subtract-Multi-Digit-Whole-Numbers-119.png\" alt=\"Envision Math Common Core Grade 4 Answers Topic 2 Fluently Add and Subtract Multi-Digit Whole Numbers 119\" width=\"87\" height=\"78\" \/><br \/>\nAnswer:<\/p>\n<p>Question 19.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-9911\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-Grade-4-Answers-Topic-2-Fluently-Add-and-Subtract-Multi-Digit-Whole-Numbers-120.png\" alt=\"Envision Math Common Core Grade 4 Answers Topic 2 Fluently Add and Subtract Multi-Digit Whole Numbers 120\" width=\"65\" height=\"85\" \/><br \/>\nAnswer:<\/p>\n<p>Question 20.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-9912\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-Grade-4-Answers-Topic-2-Fluently-Add-and-Subtract-Multi-Digit-Whole-Numbers-121.png\" alt=\"Envision Math Common Core Grade 4 Answers Topic 2 Fluently Add and Subtract Multi-Digit Whole Numbers 121\" width=\"85\" height=\"71\" \/><br \/>\nAnswer:<\/p>\n<p>Question 21.<br \/>\n6,090 \u2013 5,130<br \/>\nAnswer:<\/p>\n<p>Question 22.<br \/>\n11,246 &#8211; 9,489<br \/>\nAnswer:<\/p>\n<p>Question 23.<br \/>\n790,008 \u2013 643,829<br \/>\nAnswer:<\/p>\n<p><strong>Problem Solving<\/strong><\/p>\n<p>Question 24.<br \/>\n<strong>Construct Arguments<\/strong> Will the difference between 44,041 and 43,876 be greater or less than 1,000? Explain.<br \/>\nAnswer:<\/p>\n<p>Question 25.<br \/>\n<strong>Vocabulary<\/strong> Define variable and give an example of how a variable is used in an equation.<br \/>\nAnswer:<\/p>\n<p>For 26-27, use the table at the right.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-9913\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-Grade-4-Answers-Topic-2-Fluently-Add-and-Subtract-Multi-Digit-Whole-Numbers-122.png\" alt=\"Envision Math Common Core Grade 4 Answers Topic 2 Fluently Add and Subtract Multi-Digit Whole Numbers 122\" width=\"268\" height=\"321\" \/><br \/>\nQuestion 26.<br \/>\nHow many more hip-hop than country downloads were sold?<br \/>\nAnswer:<\/p>\n<p>Question 27.<br \/>\n<strong>Higher Order Thinking<\/strong> How many more hip-hop and Latin downloads were sold than rock and country downloads? Explain.<br \/>\nAnswer:<\/p>\n<p><strong>Assessment Practice<\/strong><\/p>\n<p>Question 28.<br \/>\nSelect all the correct differences.<br \/>\n\u2610 5,000 \u2013 1,856 = 3,244<br \/>\n\u2610 10,700 \u2013 8,243 = 2,457<br \/>\n\u2610 64,002 \u2013 43,178 = 20,934<br \/>\n\u2610 98,000 \u2013 59,214 = 38,786<br \/>\n\u2610 600,482 \u2013 428,531 = 171,951<br \/>\nAnswer:<\/p>\n<p>Question 29.<br \/>\nFind the difference.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-9914\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-Grade-4-Answers-Topic-2-Fluently-Add-and-Subtract-Multi-Digit-Whole-Numbers-123.png\" alt=\"Envision Math Common Core Grade 4 Answers Topic 2 Fluently Add and Subtract Multi-Digit Whole Numbers 123\" width=\"77\" height=\"68\" \/><br \/>\nA. 17,355<br \/>\nB. 20,757<br \/>\nC. 21,757<br \/>\nD. 98,243<br \/>\nAnswer:<\/p>\n<h3>Lesson 2.8 Problem Solving<\/h3>\n<p><strong>Reasoning<\/strong><br \/>\n<strong>Solve &amp; Share<\/strong><br \/>\nA group of students collected donations for a toy drive. They collected a total of 3,288 toys one week and 1,022 toys the next week. They donated 1,560 toys to the Coal City Charity and the rest were donated to Hartville Charity. How many toys were donated to Hartville Charity? Use reasoning about numbers to show and explain how the two quantities of toys given to charity are related.<br \/>\nI can &#8230; make sense of quantities and relationships in problem situations.<\/p>\n<p>Thinking Habits<br \/>\nBe a good thinker! These questions can help you.<\/p>\n<ul>\n<li>What do the numbers and symbols in the problem mean?<\/li>\n<li>How are the numbers or quantities related?<\/li>\n<li>How can I represent a word problem using pictures, numbers, or equations?<\/li>\n<\/ul>\n<p>Look Back! Reasoning Over three weeks, the students collected a total of 8,169 toys. How many toys did they collect in the third week? Complete the bar diagram to show your reasoning. Did the students collect more toys in the third week than in weeks 1 and 2 combined? Explain.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-9915\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-Grade-4-Answers-Topic-2-Fluently-Add-and-Subtract-Multi-Digit-Whole-Numbers-124.png\" alt=\"Envision Math Common Core Grade 4 Answers Topic 2 Fluently Add and Subtract Multi-Digit Whole Numbers 124\" width=\"210\" height=\"65\" \/><\/p>\n<p><strong>Essential Question<\/strong><br \/>\nHow Can You Use Quantitative Reasoning to Solve Problems?<\/p>\n<p>Visual Learning Bridge<br \/>\nKara and Carl join their mother on a boat off the coast of the Florida Keys. Their mother is a scientist studying blue marlins. Each child gets to help weigh two marlins. How much more did Kara&#8217;s marlins weigh than Carl&#8217;s?<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-9916\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-Grade-4-Answers-Topic-2-Fluently-Add-and-Subtract-Multi-Digit-Whole-Numbers-125.png\" alt=\"Envision Math Common Core Grade 4 Answers Topic 2 Fluently Add and Subtract Multi-Digit Whole Numbers 125\" width=\"540\" height=\"308\" \/><br \/>\nHow can you draw a diagram to help reason how the numbers in the problem are related?<br \/>\nI can represent the relationship between the numbers with a bar diagram.<\/p>\n<p>How can I use reasoning to solve this problem?<br \/>\nI can<\/p>\n<ul>\n<li>identify the quantities I know.<\/li>\n<li>draw diagrams and write equations to show relationships.<\/li>\n<li>connect the solution back to the real world problem.<\/li>\n<\/ul>\n<p>Here&#8217;s my thinking.<br \/>\nK = the total weight of Kara&#8217;s marlins, and C = the total weight of Carl&#8217;s marlins.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-9917\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-Grade-4-Answers-Topic-2-Fluently-Add-and-Subtract-Multi-Digit-Whole-Numbers-126.png\" alt=\"Envision Math Common Core Grade 4 Answers Topic 2 Fluently Add and Subtract Multi-Digit Whole Numbers 126\" width=\"398\" height=\"202\" \/><br \/>\nKara&#8217;s marlins weighed 299 pounds more than Carl&#8217;s.<\/p>\n<p>Convince Me! Reasoning Write a problem that can be solved using the bar diagram below. Write an equation to solve. Use reasoning to think about the meaning of each number before starting.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-9918\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-Grade-4-Answers-Topic-2-Fluently-Add-and-Subtract-Multi-Digit-Whole-Numbers-127.png\" alt=\"Envision Math Common Core Grade 4 Answers Topic 2 Fluently Add and Subtract Multi-Digit Whole Numbers 127\" width=\"239\" height=\"74\" \/><\/p>\n<p><strong>Guided Practice<\/strong><\/p>\n<p><strong>Reasoning<\/strong><br \/>\nA manufacturer shipped 12,875 fidget spinners one week and 9,843 of them were sold. The next week, they shipped 19,175 and 12,752 of them were sold. How many fidget spinners had not sold yet?<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-9919\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-Grade-4-Answers-Topic-2-Fluently-Add-and-Subtract-Multi-Digit-Whole-Numbers-128.png\" alt=\"Envision Math Common Core Grade 4 Answers Topic 2 Fluently Add and Subtract Multi-Digit Whole Numbers 128\" width=\"286\" height=\"419\" \/><\/p>\n<p>Question 1.<br \/>\nWhat quantities are given in the problem, and what do the numbers mean?<br \/>\nAnswer:<\/p>\n<p>Question 2.<br \/>\nUse the bar diagrams that show the relationships of the numbers in the problem. Write and solve equations which could be used to find f, the spinners not sold the first week; s, the spinners not sold the second week; and t, the total spinners not sold.<br \/>\nAnswer:<\/p>\n<p><strong>Independent Practice<\/strong><\/p>\n<p><strong>Reasoning<\/strong> A wall is being built with 16,351 stones. The builders have placed 8,361 stones, and they have 7,944 stones left. Do they have enough stones? How many more stones do they need?<\/p>\n<p>Use Exercises 3-5 to answer the question.<br \/>\nQuestion 3.<br \/>\nWhat quantities are given in the problem, and what do the numbers mean?<br \/>\nAnswer:<\/p>\n<p>Question 4.<br \/>\nComplete the bar diagram to show how to find s, the number of stones the builders have in all. Then, write and solve an equation. Do they have enough? Explain.<br \/>\nAnswer:<\/p>\n<p>Question 5.<br \/>\nComplete the bar diagram to show how to find the difference, d, of how many more stones the builders need. Then, write and solve an equation.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-9920\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-Grade-4-Answers-Topic-2-Fluently-Add-and-Subtract-Multi-Digit-Whole-Numbers-129.png\" alt=\"Envision Math Common Core Grade 4 Answers Topic 2 Fluently Add and Subtract Multi-Digit Whole Numbers 129\" width=\"265\" height=\"203\" \/><br \/>\nAnswer:<\/p>\n<p><strong>Problem Solving<\/strong><\/p>\n<p><strong>Performance Task<\/strong><br \/>\nBird Migration Ornithology is the scientific study of birds. Every year, some birds travel great distances, or migrate, to find food and start families. The table shows the distances five species of birds flew over one year, as observed by an ornithologist. How much farther did the Arctic Tern fly than the Pectoral Short-Tailed Shearwater and the Pied Wheatear combined?<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-9921\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-Grade-4-Answers-Topic-2-Fluently-Add-and-Subtract-Multi-Digit-Whole-Numbers-130.png\" alt=\"Envision Math Common Core Grade 4 Answers Topic 2 Fluently Add and Subtract Multi-Digit Whole Numbers 130\" width=\"351\" height=\"245\" \/><\/p>\n<p>Question 6.<br \/>\n<strong>Reasoning<\/strong> What quantities are given in the problem and what do the numbers mean?<br \/>\nAnswer:<\/p>\n<p>Question 7.<br \/>\nMake Sense and Persevere What strategy can you use to solve the problem?<br \/>\nAnswer:<\/p>\n<p>Question 8.<br \/>\nMake Sense and Persevere What is the hidden question?<br \/>\nThe hidden questions are the questions which must be answered before answering the main question asked in the problem.<br \/>\nAnswer:<\/p>\n<p>Question 9.<br \/>\nModel with Math Complete the bar diagrams to show how to find the answer to the hidden question and the main question. Write and solve equations.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-9922\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-Grade-4-Answers-Topic-2-Fluently-Add-and-Subtract-Multi-Digit-Whole-Numbers-131.png\" alt=\"Envision Math Common Core Grade 4 Answers Topic 2 Fluently Add and Subtract Multi-Digit Whole Numbers 131\" width=\"450\" height=\"72\" \/><br \/>\nAnswer:<\/p>\n<h4>Topic 2 Fluency Practice Activity<\/h4>\n<p><strong>Follow the Path<\/strong><br \/>\nShade a path from START to FINISH. Follow the sums that are correct. You can only move up, down, right, or left.<br \/>\nI can.. add multi-digit whole numbers.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-9923\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-Grade-4-Answers-Topic-2-Fluently-Add-and-Subtract-Multi-Digit-Whole-Numbers-132.png\" alt=\"Envision Math Common Core Grade 4 Answers Topic 2 Fluently Add and Subtract Multi-Digit Whole Numbers 132\" width=\"514\" height=\"511\" \/><\/p>\n<h3>Topic 2 Vocabulary Review<\/h3>\n<p>Understand Vocabulary<br \/>\nWord List<\/p>\n<ul>\n<li>add on<\/li>\n<li>algorithm<\/li>\n<li>Associative Property of Addition<\/li>\n<li>Commutative Property of Addition<\/li>\n<li>compensation<\/li>\n<li>Identity Property of Addition<\/li>\n<li>inverse operations<\/li>\n<li>variable<\/li>\n<\/ul>\n<p>Question 1.<br \/>\nCircle the property of addition shown by 126 + 0 = 126.<br \/>\nAssociative<br \/>\nCommutative<br \/>\nIdentity<br \/>\nAnswer:<\/p>\n<p>Question 2.<br \/>\nCircle the property of addition shown by 21 + 34 = 34 + 21.<br \/>\nAssociative<br \/>\nCommutative<br \/>\nIdentity<br \/>\nAnswer:<\/p>\n<p>Question 3.<br \/>\nCircle the property of addition shown by (1 + 3) + 7 = 1 + (3 + 7).<br \/>\nAssociative<br \/>\nCommutative<br \/>\nIdentity<br \/>\nAnswer:<\/p>\n<p>Question 4.<br \/>\nDraw a line from each term to its example.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-9924\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-Grade-4-Answers-Topic-2-Fluently-Add-and-Subtract-Multi-Digit-Whole-Numbers-133.png\" alt=\"Envision Math Common Core Grade 4 Answers Topic 2 Fluently Add and Subtract Multi-Digit Whole Numbers 133\" width=\"478\" height=\"312\" \/><br \/>\nAnswer:<\/p>\n<p><strong>Use Vocabulary in Writing<\/strong><br \/>\nQuestion 5.<br \/>\nRob found 103 + 1,875 = x using mental math. Use at least 3 terms from the Word List to describe how Rob could find the sum.<br \/>\nAnswer:<\/p>\n<h3>Topic 2 Reteaching<\/h3>\n<p><strong>Set A pages 37-40<\/strong><\/p>\n<p>Find 3,371 + 2,429. Use mental math.<br \/>\nMake Ten<br \/>\n3,371 + 2,429 = 3,371 + (29 + 2,400)<br \/>\n= (3,371 +29) + 2,400<br \/>\n= 3,400 + 2,400 = 5,800<br \/>\nS0, 3,371 + 2,429 = 5,800.<\/p>\n<p><strong>Remember<\/strong> to adjust the sum or difference when you use the compensation strategy.<br \/>\nQuestion 1.<br \/>\n4,153 + 2,988<br \/>\nAnswer:<\/p>\n<p>Question 2.<br \/>\n92,425 + 31,675<br \/>\nAnswer:<\/p>\n<p>Question 3.<br \/>\n5,342 + 1,999<br \/>\nAnswer:<\/p>\n<p>Question 4.<br \/>\n22,283 \u2013 14,169<br \/>\nAnswer:<\/p>\n<p>Question 5.<br \/>\n47,676 &#8211; 16,521<br \/>\nAnswer:<\/p>\n<p>Question 6.<br \/>\n1,089 &#8211; 961<br \/>\nAnswer:<\/p>\n<p><strong>Set B pages 41-44<\/strong><\/p>\n<p>Estimate the sum by rounding each number to the nearest ten thousand.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-9925\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-Grade-4-Answers-Topic-2-Fluently-Add-and-Subtract-Multi-Digit-Whole-Numbers-134.png\" alt=\"Envision Math Common Core Grade 4 Answers Topic 2 Fluently Add and Subtract Multi-Digit Whole Numbers 134\" width=\"80\" height=\"57\" \/><br \/>\n241,485 rounds to 240,000.<br \/>\n429,693 rounds to 430,000.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-9926\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-Grade-4-Answers-Topic-2-Fluently-Add-and-Subtract-Multi-Digit-Whole-Numbers-135.png\" alt=\"Envision Math Common Core Grade 4 Answers Topic 2 Fluently Add and Subtract Multi-Digit Whole Numbers 135\" width=\"177\" height=\"88\" \/><\/p>\n<p><strong>Remember<\/strong> that you can round numbers to any place when estimating sums and differences.<\/p>\n<p>Estimate each sum or difference.<br \/>\nQuestion 1.<br \/>\n652,198 + 49,753<br \/>\nAnswer:<\/p>\n<p>Question 2.<br \/>\n8,352 \u2013 3,421<br \/>\nAnswer:<\/p>\n<p>Question 3.<br \/>\n17,586 &#8211; 9,483<br \/>\nAnswer:<\/p>\n<p>Question 4.<br \/>\n823,725 + 44,851<br \/>\nAnswer:<\/p>\n<p>Question 5.<br \/>\n1,440 \u2013 933<br \/>\nAnswer:<\/p>\n<p>Question 6.<br \/>\n55,748 \u2013 28,392<br \/>\nAnswer:<\/p>\n<p>Question 7.<br \/>\n4,981 + 6,193<br \/>\nAnswer:<\/p>\n<p>Question 8.<br \/>\n995,275 + 4,921<br \/>\nAnswer:<\/p>\n<p><strong>Set C pages 45-52<\/strong><\/p>\n<p>Find 72,438 + 6,854.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-9927\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-Grade-4-Answers-Topic-2-Fluently-Add-and-Subtract-Multi-Digit-Whole-Numbers-136.png\" alt=\"Envision Math Common Core Grade 4 Answers Topic 2 Fluently Add and Subtract Multi-Digit Whole Numbers 136\" width=\"309\" height=\"138\" \/><br \/>\nThe answer 79,292 is close to the estimate of 79,000, so the answer is reasonable.<\/p>\n<p><strong>Remember<\/strong> to regroup if necessary when adding whole numbers.<br \/>\nQuestion 1.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-9928\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-Grade-4-Answers-Topic-2-Fluently-Add-and-Subtract-Multi-Digit-Whole-Numbers-137.png\" alt=\"Envision Math Common Core Grade 4 Answers Topic 2 Fluently Add and Subtract Multi-Digit Whole Numbers 137\" width=\"80\" height=\"79\" \/><br \/>\nAnswer:<\/p>\n<p>Question 2.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-9929\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-Grade-4-Answers-Topic-2-Fluently-Add-and-Subtract-Multi-Digit-Whole-Numbers-138.png\" alt=\"Envision Math Common Core Grade 4 Answers Topic 2 Fluently Add and Subtract Multi-Digit Whole Numbers 138\" width=\"83\" height=\"81\" \/><br \/>\nAnswer:<\/p>\n<p>Question 3.<br \/>\n215 + 8,823<br \/>\nAnswer:<\/p>\n<p>Question 4.<br \/>\n142,968 + 44,456<br \/>\nAnswer:<\/p>\n<p>Question 5.<br \/>\n2,417 + 3,573<br \/>\nAnswer:<\/p>\n<p>Question 6.<br \/>\n572,941 + 181,662<br \/>\nAnswer:<\/p>\n<p><strong>Set D pages 53-60<\/strong><\/p>\n<p>Find 52,839 \u2013 38,796.<br \/>\nEstimate: 53,000 \u2013 39,000 = 14,000<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-9930\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-Grade-4-Answers-Topic-2-Fluently-Add-and-Subtract-Multi-Digit-Whole-Numbers-139.png\" alt=\"Envision Math Common Core Grade 4 Answers Topic 2 Fluently Add and Subtract Multi-Digit Whole Numbers 139\" width=\"308\" height=\"122\" \/><br \/>\nThe answer is reasonable.<\/p>\n<p><strong>Remember<\/strong> that you may need to regroup to subtract.<\/p>\n<p>Question 1.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-9931\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-Grade-4-Answers-Topic-2-Fluently-Add-and-Subtract-Multi-Digit-Whole-Numbers-140.png\" alt=\"Envision Math Common Core Grade 4 Answers Topic 2 Fluently Add and Subtract Multi-Digit Whole Numbers 140\" width=\"91\" height=\"70\" \/><br \/>\nAnswer:<\/p>\n<p>Question 2.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-9932\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-Grade-4-Answers-Topic-2-Fluently-Add-and-Subtract-Multi-Digit-Whole-Numbers-141.png\" alt=\"Envision Math Common Core Grade 4 Answers Topic 2 Fluently Add and Subtract Multi-Digit Whole Numbers 141\" width=\"78\" height=\"72\" \/><br \/>\nAnswer:<\/p>\n<p>Question 3.<br \/>\n41,542 \u2013 32,411<br \/>\nAnswer:<\/p>\n<p>Question 4.<br \/>\n4,978 &#8211; 2,766<br \/>\nAnswer:<\/p>\n<p>Question 5.<br \/>\n735,184 &#8211; 255,863<br \/>\nAnswer:<\/p>\n<p>Question 6.<br \/>\n44,558 \u2013 22,613<br \/>\nAnswer:<\/p>\n<p><strong>Set E pages 61-64<\/strong><\/p>\n<p>Find 60,904 \u2013 54,832.<br \/>\nEstimate: 61,000 \u2013 55,000 = 6,000<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-9933\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-Grade-4-Answers-Topic-2-Fluently-Add-and-Subtract-Multi-Digit-Whole-Numbers-142.png\" alt=\"Envision Math Common Core Grade 4 Answers Topic 2 Fluently Add and Subtract Multi-Digit Whole Numbers 142\" width=\"271\" height=\"136\" \/><br \/>\nThe answer is reasonable.<\/p>\n<p><strong>Remember<\/strong> you may need to regroup more than one place at a time to subtract across zeros.<br \/>\nQuestion 1.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-9934\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-Grade-4-Answers-Topic-2-Fluently-Add-and-Subtract-Multi-Digit-Whole-Numbers-143.png\" alt=\"Envision Math Common Core Grade 4 Answers Topic 2 Fluently Add and Subtract Multi-Digit Whole Numbers 143\" width=\"78\" height=\"71\" \/><br \/>\nAnswer:<\/p>\n<p>Question 2.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-9935\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-Grade-4-Answers-Topic-2-Fluently-Add-and-Subtract-Multi-Digit-Whole-Numbers-144.png\" alt=\"Envision Math Common Core Grade 4 Answers Topic 2 Fluently Add and Subtract Multi-Digit Whole Numbers 144\" width=\"87\" height=\"72\" \/><br \/>\nAnswer:<\/p>\n<p>Question 3.<br \/>\n70,000 \u2013 25,228<br \/>\nAnswer:<\/p>\n<p>Question 4.<br \/>\n560,043 \u2013 312,562<br \/>\nAnswer:<\/p>\n<p>Question 5.<br \/>\n8,052 \u2013 1,205<br \/>\nAnswer:<\/p>\n<p>Question 6.<br \/>\n20,008 \u2013 16,074<br \/>\nAnswer:<\/p>\n<p><strong>Set F pages 65-68<\/strong><\/p>\n<p>Think about these questions to help you reason abstractly and quantitatively.<br \/>\nThinking Habits<\/p>\n<ul>\n<li>What do the numbers and symbols in the problem mean?<\/li>\n<li>How are the numbers or quantities related?<\/li>\n<li>How can I represent a word problem using pictures, numbers, or equations?<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-9936\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-Grade-4-Answers-Topic-2-Fluently-Add-and-Subtract-Multi-Digit-Whole-Numbers-145.png\" alt=\"Envision Math Common Core Grade 4 Answers Topic 2 Fluently Add and Subtract Multi-Digit Whole Numbers 145\" width=\"131\" height=\"161\" \/><\/li>\n<\/ul>\n<p><strong>Remember<\/strong> that you can draw a bar diagram and use it to reason about a problem.<\/p>\n<p>Raahil traveled 11,469 kilometers from home to visit his mother&#8217;s family in Qatar. He then traveled 12,332 kilometers from Qatar to visit his father&#8217;s family in Brisbane, Australia.<br \/>\nQuestion 1.<br \/>\nDraw a bar diagram that shows the distance Raahil traveled to Brisbane.<br \/>\nAnswer:<\/p>\n<p>Question 2.<br \/>\nWrite and solve an equation for your bar diagram.<br \/>\nAnswer:<\/p>\n<h3>Topic 2 Assessment Practice<\/h3>\n<p>Question 1.<br \/>\nThe table shows the number of hot dogs Frank&#8217;s hot dog stand sold this weekend.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-9937\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-Grade-4-Answers-Topic-2-Fluently-Add-and-Subtract-Multi-Digit-Whole-Numbers-146.png\" alt=\"Envision Math Common Core Grade 4 Answers Topic 2 Fluently Add and Subtract Multi-Digit Whole Numbers 146\" width=\"203\" height=\"145\" \/><br \/>\nA. Estimate the number of hot dogs sold by rounding each number in the table to the nearest thousand and finding the sum.<br \/>\nAnswer:<\/p>\n<p>B. Write and solve an equation to find how many hot dogs were sold.<br \/>\nAnswer:<\/p>\n<p>Question 2.<br \/>\nFind 8,000 &#8211; 6,280.<br \/>\nAnswer:<\/p>\n<p>Question 3.<br \/>\nEnter the missing digit to complete the subtraction.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-9938\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-Grade-4-Answers-Topic-2-Fluently-Add-and-Subtract-Multi-Digit-Whole-Numbers-147.png\" alt=\"Envision Math Common Core Grade 4 Answers Topic 2 Fluently Add and Subtract Multi-Digit Whole Numbers 147\" width=\"120\" height=\"92\" \/><br \/>\nAnswer:<\/p>\n<p>Question 4.<br \/>\nFind the difference.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-9939\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-Grade-4-Answers-Topic-2-Fluently-Add-and-Subtract-Multi-Digit-Whole-Numbers-148.png\" alt=\"Envision Math Common Core Grade 4 Answers Topic 2 Fluently Add and Subtract Multi-Digit Whole Numbers 148\" width=\"88\" height=\"65\" \/><br \/>\nA. 6,811<br \/>\nB. 6,351<br \/>\nC. 6,333<br \/>\nD. 6,331<br \/>\nAnswer:<\/p>\n<p>Question 5.<br \/>\nComplete the equation to make it true. Write your answer in the box.<br \/>\n12,769 + 16,065 = _________ + 15,402<br \/>\nAnswer:<\/p>\n<p>Question 6.<br \/>\nFind the difference. Then use addition to check your work.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-9940\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-Grade-4-Answers-Topic-2-Fluently-Add-and-Subtract-Multi-Digit-Whole-Numbers-149.png\" alt=\"Envision Math Common Core Grade 4 Answers Topic 2 Fluently Add and Subtract Multi-Digit Whole Numbers 149\" width=\"96\" height=\"75\" \/><br \/>\nAnswer:<\/p>\n<p>Question 7.<br \/>\nWhich of the following statements is true? Select all that apply.<br \/>\n\u2610 12,395 + 14,609 = 27,004<br \/>\n\u2610 76,237 \u2013 4,657 = 42,430<br \/>\n\u2610 67,407 \u2013 38,227 = 29,180<br \/>\n\u2610 69,844 + 1,014 = 70,452<br \/>\n\u2610 34,980 &#8211; 1,999 = 32,981<br \/>\nAnswer:<\/p>\n<p>Question 8.<br \/>\nFind the sum.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-9941\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-Grade-4-Answers-Topic-2-Fluently-Add-and-Subtract-Multi-Digit-Whole-Numbers-150.png\" alt=\"Envision Math Common Core Grade 4 Answers Topic 2 Fluently Add and Subtract Multi-Digit Whole Numbers 150\" width=\"85\" height=\"91\" \/><br \/>\nAnswer:<\/p>\n<p>Question 9.<br \/>\nSandra used addition properties to rewrite the equation below. Select all the equations Sandra might have written.<br \/>\n1,450 + 1,125 + 1,050 = n<br \/>\n\u2610 (1,400 + 1,100 + 1,000) + (50 + 25 + 50) = n<br \/>\n\u2610 1,450 + 1,050 = n 1,125 + 1,050 + 1,450 = n<br \/>\n\u2610 1,000 + 1,000 + 1,000 + 450 + 50 + 125 = 1<br \/>\n\u2610 (1,450 + 1,050) + 1,125 = n<br \/>\nAnswer:<\/p>\n<p>Question 10.<br \/>\nJoe and Sara recorded the number of birds they saw in the park over two summers.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-9942\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-Grade-4-Answers-Topic-2-Fluently-Add-and-Subtract-Multi-Digit-Whole-Numbers-151.png\" alt=\"Envision Math Common Core Grade 4 Answers Topic 2 Fluently Add and Subtract Multi-Digit Whole Numbers 151\" width=\"305\" height=\"149\" \/><\/p>\n<p>A. Write and solve equations to find how many more total birds Joe and Sara saw this year than last year.<br \/>\nAnswer:<\/p>\n<p>B. Estimate how many more birds were seen in the park this year than last year by rounding each number in the table and solving the problem. Use the estimate to check if your answer to Part A is reasonable.<br \/>\nAnswer:<\/p>\n<h3>Topic 2 Performance Task<\/h3>\n<p>Taking Inventory Jiao runs a wholesale art supply website. She fills bulk orders for craft and hobby stores.<br \/>\nQuestion 1.<br \/>\nUse the Wooden Beads table to answer the questions.<br \/>\nPart A<br \/>\nCrafts and Stuff ordered oak and ebony beads. Explain how to use mental math and properties of addition to find how many beads Jiao sent.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-9943\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-Grade-4-Answers-Topic-2-Fluently-Add-and-Subtract-Multi-Digit-Whole-Numbers-152.png\" alt=\"Envision Math Common Core Grade 4 Answers Topic 2 Fluently Add and Subtract Multi-Digit Whole Numbers 152\" width=\"176\" height=\"245\" \/><br \/>\nAnswer:<\/p>\n<p>Part B<br \/>\nJiao sends an order of oak and bayong beads to Jill&#8217;s Crafts and an order of ash and ebony beads to Create. How much larger is the order for Create? Write and solve equations to find j, the number of beads in the order to Jill&#8217;s Crafts; c, the number of beads in the order to Create; and d, the difference.<br \/>\nAnswer:<\/p>\n<p>Question 2.<br \/>\nUse the Glass Beads table to answer the questions.<br \/>\nPart A<br \/>\nWrite and solve an equation to show how many glass beads, b, Create will have if they order the bubble and smoky beads.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-9944\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-Grade-4-Answers-Topic-2-Fluently-Add-and-Subtract-Multi-Digit-Whole-Numbers-153.png\" alt=\"Envision Math Common Core Grade 4 Answers Topic 2 Fluently Add and Subtract Multi-Digit Whole Numbers 153\" width=\"169\" height=\"209\" \/><br \/>\nAnswer:<\/p>\n<p>Part B<br \/>\nJiao sends the molded and stained beads to Hometown Craft Supply. Explain how to use compensation to find how many more molded beads than stained beads were sent.<br \/>\nAnswer:<\/p>\n<p>Question 3.<br \/>\nUse the Metal Beads table to answer the questions.<br \/>\nPart A<br \/>\nWrite and solve an equation to show how many more beads, b, are in an order of gold beads than in an order of platinum beads.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-9945\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-Grade-4-Answers-Topic-2-Fluently-Add-and-Subtract-Multi-Digit-Whole-Numbers-154.png\" alt=\"Envision Math Common Core Grade 4 Answers Topic 2 Fluently Add and Subtract Multi-Digit Whole Numbers 154\" width=\"172\" height=\"236\" \/><br \/>\nAnswer:<\/p>\n<p>Part B<br \/>\nCraftology orders the brass and copper beads. After they arrive, the store sells 29,735 of them. How many beads does Craftology have left from their order? Show your computations.<br \/>\nAnswer:<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Practice with the help of enVision Math Common Core Grade 4 Answer Key Topic 2 Fluently Add and Subtract Multi-Digit Whole Numbers regularly and improve your accuracy in solving questions. enVision Math Common Core 4th Grade Answers Key Topic 2 Fluently Add and Subtract Multi-Digit Whole Numbers Essential Questions: How can sums and differences of &#8230; <a title=\"enVision Math Common Core Grade 4 Answer Key Topic 2 Fluently Add and Subtract Multi-Digit Whole Numbers\" class=\"read-more\" href=\"https:\/\/bigideasmathanswers.com\/envision-math-common-core-grade-4-answer-key-topic-2\/\" aria-label=\"More on enVision Math Common Core Grade 4 Answer Key Topic 2 Fluently Add and Subtract Multi-Digit Whole Numbers\">Read more<\/a><\/p>\n","protected":false},"author":13,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"spay_email":""},"categories":[10],"tags":[],"jetpack_featured_media_url":"","_links":{"self":[{"href":"https:\/\/bigideasmathanswers.com\/wp-json\/wp\/v2\/posts\/90082"}],"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\/13"}],"replies":[{"embeddable":true,"href":"https:\/\/bigideasmathanswers.com\/wp-json\/wp\/v2\/comments?post=90082"}],"version-history":[{"count":1,"href":"https:\/\/bigideasmathanswers.com\/wp-json\/wp\/v2\/posts\/90082\/revisions"}],"predecessor-version":[{"id":90083,"href":"https:\/\/bigideasmathanswers.com\/wp-json\/wp\/v2\/posts\/90082\/revisions\/90083"}],"wp:attachment":[{"href":"https:\/\/bigideasmathanswers.com\/wp-json\/wp\/v2\/media?parent=90082"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/bigideasmathanswers.com\/wp-json\/wp\/v2\/categories?post=90082"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/bigideasmathanswers.com\/wp-json\/wp\/v2\/tags?post=90082"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}