{"id":89970,"date":"2022-03-31T17:01:53","date_gmt":"2022-03-31T11:31:53","guid":{"rendered":"https:\/\/bigideasmathanswers.com\/?p=89970"},"modified":"2022-04-07T14:45:48","modified_gmt":"2022-04-07T09:15:48","slug":"envision-math-common-core-grade-1-answer-key-topic-1","status":"publish","type":"post","link":"https:\/\/bigideasmathanswers.com\/envision-math-common-core-grade-1-answer-key-topic-1\/","title":{"rendered":"enVision Math Common Core Grade 1 Answer Key Topic 1 Understand Addition and Subtraction"},"content":{"rendered":"<p>Practice with the help of <a href=\"https:\/\/bigideasmathanswers.com\/envision-math-common-core-grade-1-answer-key\/\">enVision Math Common Core Grade 1 Answer Key<\/a> <strong>Topic 1 Understand Addition and Subtraction<\/strong> regularly and improve your accuracy in solving questions.<\/p>\n<h2>enVision Math Common Core 1st Grade Answers Key Topic 1 Understand Addition and Subtraction<\/h2>\n<p><strong>Essential Question:<\/strong><\/p>\n<p>What are ways to think about addition and subtraction?<\/p>\n<p>Look at the adult and baby giraffes.<\/p>\n<p>How are they the same? How are they different?<\/p>\n<p><img loading=\"lazy\" class=\"alignnone size-full wp-image-2081\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-1st-Grade-Answer-Key-Topic-1-Understand-Addition-and-Subtraction-100.png\" alt=\"Envision Math Common Core 1st Grade Answer Key Topic 1 Understand Addition and Subtraction 100\" width=\"420\" height=\"327\" \/><\/p>\n<p>Wow! Let&#8217;s do this project and learn more.<\/p>\n<p>envision STEM Project: Parents and Babies<\/p>\n<p>Find Out Talk to friends and relatives about different animals and their babies.<br \/>\nAsk them how the parents and babies are the same and how they are different.<\/p>\n<p>Journal: Make a Book Show what you found.<br \/>\nIn your book, also:<\/p>\n<ul>\n<li>Draw some animals, including the parents and babies.<\/li>\n<li>Create and solve addition and subtraction stories about some animals and their babies.<\/li>\n<\/ul>\n<p><strong>Review What You Know<br \/>\n<\/strong><strong>Vocabulary<\/strong><\/p>\n<p>Question 1.<br \/>\nCount the fish. Write the number that tells how many.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-1943\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-Grade-1-Answer-Key-Topic-1-Understand-Addition-and-Subtraction-1.png\" alt=\"Envision Math Common Core Grade 1 Answer Key Topic 1 Understand Addition and Subtraction 1\" width=\"275\" height=\"222\" \/><br \/>\nAnswer:<br \/>\nNumber of fishes given in the picture = 5 or Five.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-medium wp-image-4162\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-1st-Grade-Answers-Key-Topic-1-Understand-Addition-and-Subtraction-Vocabulary-1-300x252.png\" alt=\"Envision-Math-Common-Core-1st-Grade-Answers-Key-Topic-1-Understand-Addition-and-Subtraction-Vocabulary-1\" width=\"300\" height=\"252\" \/><\/p>\n<p>Explanation:<br \/>\nNumber of fishes given in the picture = 5 or Five.<\/p>\n<p>&nbsp;<\/p>\n<p>Question 2.<br \/>\nJoin the two groups and write how many.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-1944\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-Grade-1-Answer-Key-Topic-1-Understand-Addition-and-Subtraction-2.png\" alt=\"Envision Math Common Core Grade 1 Answer Key Topic 1 Understand Addition and Subtraction 2\" width=\"261\" height=\"193\" \/><br \/>\nAnswer:<br \/>\nTotal number of apples in the figure = 4 or Four.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-medium wp-image-4163\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-1st-Grade-Answers-Key-Topic-1-Understand-Addition-and-Subtraction-Vocabulary-2-300x232.png\" alt=\"Envision-Math-Common-Core-1st-Grade-Answers-Key-Topic-1-Understand-Addition-and-Subtraction-Vocabulary-2\" width=\"300\" height=\"232\" \/><\/p>\n<p>Explanation:<br \/>\nNumber of black apples in the figure = 2 or Two.<br \/>\nNumber of grey apples in the figure = 2 or Two.<br \/>\nTotal number of apples in the figure = Number of black apples in the figure + Number of grey apples in the figure<br \/>\n= 2 + 2<br \/>\n= 4 or Four.<\/p>\n<p>&nbsp;<\/p>\n<p>Question 3.<br \/>\nWrite how many soccer balls there are in all.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-1945\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-Grade-1-Answer-Key-Topic-1-Understand-Addition-and-Subtraction-3.png\" alt=\"Envision Math Common Core Grade 1 Answer Key Topic 1 Understand Addition and Subtraction 3\" width=\"136\" height=\"231\" \/><br \/>\nAnswer:<br \/>\nTotal number of balls in the figure = 4 or Four.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-4224\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-1st-Grade-Answers-Key-Topic-1-Understand-Addition-and-Subtraction-Vocabulary-3.png\" alt=\"Envision-Math-Common-Core-1st-Grade-Answers-Key-Topic-1-Understand-Addition-and-Subtraction-Vocabulary-3\" width=\"255\" height=\"345\" \/><\/p>\n<p>Explanation:<br \/>\nNumber of foot balls in the figure = 3 or Three.<br \/>\nNumber of tennis balls in the figure =1 or One.<br \/>\nTotal number of balls in the figure = Number of foot balls in the figure + Number of tennis balls in the figure<br \/>\n= 3 + 1<br \/>\n= 4 or Four.<\/p>\n<p>&nbsp;<\/p>\n<p><strong>Counting<br \/>\n<\/strong>Question 4.<br \/>\nTammy has 4 balloons. Draw a picture of her balloons.<br \/>\nAnswer:<br \/>\nNumber of balloons Tammy has = 4 or Four.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-4225\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-1st-Grade-Answers-Key-Topic-1-Understand-Addition-and-Subtraction-Vocabulary-4.png\" alt=\"Envision-Math-Common-Core-1st-Grade-Answers-Key-Topic-1-Understand-Addition-and-Subtraction-Vocabulary-4\" width=\"250\" height=\"360\" \/><\/p>\n<p>Explanation:<br \/>\nNumber of balloons Tammy has = 4 or Four.<\/p>\n<p>&nbsp;<\/p>\n<p>Question 5.<br \/>\nWrite the number that tells how many cats.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-1946\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-Grade-1-Answer-Key-Topic-1-Understand-Addition-and-Subtraction-4.png\" alt=\"Envision Math Common Core Grade 1 Answer Key Topic 1 Understand Addition and Subtraction 4\" width=\"258\" height=\"103\" \/><br \/>\nAnswer:<br \/>\nNumber of cats in the given picture = 3 or Three.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-4226\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-1st-Grade-Answers-Key-Topic-1-Understand-Addition-and-Subtraction-Vocabulary-5.png\" alt=\"Envision-Math-Common-Core-1st-Grade-Answers-Key-Topic-1-Understand-Addition-and-Subtraction-Vocabulary-5\" width=\"331\" height=\"245\" \/><\/p>\n<p>Explanation:<br \/>\nNumber of cats in the given picture = 3 or Three.<\/p>\n<p>&nbsp;<\/p>\n<p><strong>Sums<br \/>\n<\/strong>Question 6.<br \/>\nCircle the number that shows how many crabs you see.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-1947\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-Grade-1-Answer-Key-Topic-1-Understand-Addition-and-Subtraction-5.png\" alt=\"Envision Math Common Core Grade 1 Answer Key Topic 1 Understand Addition and Subtraction 5\" width=\"257\" height=\"112\" \/><br \/>\nAnswer:<br \/>\nNumber of crabs in the given picture = 3 or Three.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-4228\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-1st-Grade-Answers-Key-Topic-1-Understand-Addition-and-Subtraction-Vocabulary-Sums-6-1.png\" alt=\"Envision-Math-Common-Core-1st-Grade-Answers-Key-Topic-1-Understand-Addition-and-Subtraction-Vocabulary-Sums-6\" width=\"350\" height=\"202\" \/><\/p>\n<p>Explanation:<br \/>\nNumber of crabs in the given picture = 3 or Three.<br \/>\nNumber of scorpions in the given picture = 2 or Two.<\/p>\n<p>&nbsp;<\/p>\n<p>&nbsp;<\/p>\n<p><strong>Pick a Project<br \/>\n<\/strong>Project 1A<\/p>\n<p>Where do birds lay their eggs?<br \/>\nProject: Draw a bird Clutch<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-1948\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-Grade-1-Answer-Key-Topic-1-Understand-Addition-and-Subtraction-6.png\" alt=\"Envision Math Common Core Grade 1 Answer Key Topic 1 Understand Addition and Subtraction 6\" width=\"482\" height=\"184\" \/><br \/>\nAnswer:<br \/>\nBirds lay their Eggs in their nests.<\/p>\n<p>Explanation:<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-4230\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-1st-Grade-Answers-Key-Topic-1-Understand-Addition-and-Subtraction-Vocabulary-Sums-Project-1A.png\" alt=\"Envision-Math-Common-Core-1st-Grade-Answers-Key-Topic-1-Understand-Addition-and-Subtraction-Vocabulary-Sums-Project 1A\" width=\"288\" height=\"194\" \/><\/p>\n<p>&nbsp;<\/p>\n<p>Project 1B<br \/>\nWhat is the most popular fruit juice in the world?<br \/>\nProject: Find Fruit Facts<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-1949\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-Grade-1-Answer-Key-Topic-1-Understand-Addition-and-Subtraction-7.png\" alt=\"Envision Math Common Core Grade 1 Answer Key Topic 1 Understand Addition and Subtraction 7\" width=\"477\" height=\"180\" \/><br \/>\nAnswer:<br \/>\nThe most popular fruit juice in the world\u00a0 is orange juice.<\/p>\n<p>Explanation:<br \/>\nThe most popular fruit juice in the world\u00a0 is orange juice.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-4231\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-1st-Grade-Answers-Key-Topic-1-Understand-Addition-and-Subtraction-Vocabulary-Sums-Project-1B.png\" alt=\"Envision-Math-Common-Core-1st-Grade-Answers-Key-Topic-1-Understand-Addition-and-Subtraction-Vocabulary-Sums-Project 1B\" width=\"342\" height=\"501\" \/><\/p>\n<p>Project 1C<br \/>\nWhat are different homes made of?<br \/>\nProject: Build a model<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-1950\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-Grade-1-Answer-Key-Topic-1-Understand-Addition-and-Subtraction-8.png\" alt=\"Envision Math Common Core Grade 1 Answer Key Topic 1 Understand Addition and Subtraction 8\" width=\"484\" height=\"182\" \/><\/p>\n<p>Answer:<br \/>\nMany houses are now\u00a0made\u00a0with steel frames put together with rivets and bolts.<\/p>\n<p>Explanation:<br \/>\nGenerally houses are made of steel , iron, mud ,clay ,stones , cement.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-4232\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-1st-Grade-Answers-Key-Topic-1-Understand-Addition-and-Subtraction-Vocabulary-Sums-Project-1C.png\" alt=\"Envision-Math-Common-Core-1st-Grade-Answers-Key-Topic-1-Understand-Addition-and-Subtraction-Vocabulary-Sums-Project 1C\" width=\"256\" height=\"231\" \/><\/p>\n<h3><\/h3>\n<h3><\/h3>\n<h3>Lesson 1.1 Add To<br \/>\nSolve and Share<\/h3>\n<p>4 dogs<br \/>\nSome dogs join.<br \/>\nHow many dogs now?<br \/>\nShow how you solve.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-1951\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-Grade-1-Answer-Key-Topic-1-Understand-Addition-and-Subtraction-20.png\" alt=\"Envision Math Common Core Grade 1 Answer Key Topic 1 Understand Addition and Subtraction 20\" width=\"244\" height=\"92\" \/><br \/>\n_______ dogs now<br \/>\nAnswer:<br \/>\nTotal number of dogs = 8 or Eight.<br \/>\n___8____ dogs now.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-4234\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-1st-Grade-Answers-Key-Topic-1-Understand-Addition-and-Subtraction-Lesson-1.1-Add-To-Solve-and-Share.png\" alt=\"Envision-Math-Common-Core-1st-Grade-Answers-Key-Topic-1-Understand-Addition-and-Subtraction-Lesson 1.1 Add To-Solve and Share\" width=\"335\" height=\"301\" \/><\/p>\n<p>Explanation:<br \/>\nNumber of dogs given in the picture = 4 or Four.<br \/>\nNumber of dogs joined more = 4 or Four.<br \/>\nTotal number of dogs = Number of dogs given in the picture\u00a0 + Number of dogs joined more<br \/>\n= 4 + 4<br \/>\n= 8 or Eight.<\/p>\n<p>&nbsp;<\/p>\n<p><strong>Visual Learning Bridge<\/strong><\/p>\n<p><img loading=\"lazy\" class=\"alignnone size-full wp-image-1952\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-Grade-1-Answer-Key-Topic-1-Understand-Addition-and-Subtraction-25.png\" alt=\"Envision Math Common Core Grade 1 Answer Key Topic 1 Understand Addition and Subtraction 25\" width=\"979\" height=\"332\" \/><\/p>\n<p><strong>Convince Me!<br \/>\n<\/strong>How do cubes help you solve the problem?<br \/>\nAnswer:<br \/>\nCubes helps to solve the problem easier in counting.<\/p>\n<p>Explanation:<br \/>\nCubes helps to solve the problem easier in counting without any confusion.<\/p>\n<p><img src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-Grade-1-Answer-Key-Topic-1-Understand-Addition-and-Subtraction-25.png\" alt=\"Envision Math Common Core Grade 1 Answer Key Topic 1 Understand Addition and Subtraction 25\" \/><\/p>\n<p>&nbsp;<\/p>\n<p>&nbsp;<\/p>\n<p><strong>Guided Practice<br \/>\n<\/strong>Solve. Use cubes to help.<\/p>\n<p>Question 1.<br \/>\n3 cows<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-1953\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-Grade-1-Answer-Key-Topic-1-Understand-Addition-and-Subtraction-30.png\" alt=\"Envision Math Common Core Grade 1 Answer Key Topic 1 Understand Addition and Subtraction 30\" width=\"224\" height=\"142\" \/><br \/>\n3 cows join.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-1954\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-Grade-1-Answer-Key-Topic-1-Understand-Addition-and-Subtraction-31.png\" alt=\"Envision Math Common Core Grade 1 Answer Key Topic 1 Understand Addition and Subtraction 31\" width=\"237\" height=\"53\" \/><br \/>\nHow many cows now?<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-1955\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-Grade-1-Answer-Key-Topic-1-Understand-Addition-and-Subtraction-32.png\" alt=\"Envision Math Common Core Grade 1 Answer Key Topic 1 Understand Addition and Subtraction 32\" width=\"269\" height=\"48\" \/><\/p>\n<p>Answer:<br \/>\nTotal number of cows now = 6 or Six.<br \/>\n<img src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-Grade-1-Answer-Key-Topic-1-Understand-Addition-and-Subtraction-32.png\" alt=\"Envision Math Common Core Grade 1 Answer Key Topic 1 Understand Addition and Subtraction 32\" \/><\/p>\n<p>Explanation:<br \/>\nNumber of cows in the given picture = 3 or Three.<br \/>\nNumber of cows more joined = 3 or Three.<br \/>\nTotal number of cows now = Number of cows in the given picture + Number of cows more joined<br \/>\n= 3 + 3<br \/>\n= 6 or Six.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-4237\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-1st-Grade-Answers-Key-Topic-1-Understand-Addition-and-Subtraction-Lesson-1.1-Add-To-Guided-Practice-1-1.png\" alt=\"Envision-Math-Common-Core-1st-Grade-Answers-Key-Topic-1-Understand-Addition-and-Subtraction-Lesson 1.1 Add To-Guided Practice-1\" width=\"430\" height=\"379\" \/>\u00a0 \u00a0 <img src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-Grade-1-Answer-Key-Topic-1-Understand-Addition-and-Subtraction-32.png\" alt=\"Envision Math Common Core Grade 1 Answer Key Topic 1 Understand Addition and Subtraction 32\" \/><\/p>\n<p>&nbsp;<\/p>\n<p>Question 2.<br \/>\n2 birds<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-1956\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-Grade-1-Answer-Key-Topic-1-Understand-Addition-and-Subtraction-33.png\" alt=\"Envision Math Common Core Grade 1 Answer Key Topic 1 Understand Addition and Subtraction 33\" width=\"164\" height=\"109\" \/><br \/>\n6 birds join.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-1957\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-Grade-1-Answer-Key-Topic-1-Understand-Addition-and-Subtraction-34.png\" alt=\"Envision Math Common Core Grade 1 Answer Key Topic 1 Understand Addition and Subtraction 34\" width=\"172\" height=\"91\" \/><br \/>\nHow many birds now?<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-1958\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-Grade-1-Answer-Key-Topic-1-Understand-Addition-and-Subtraction-35.png\" alt=\"Envision Math Common Core Grade 1 Answer Key Topic 1 Understand Addition and Subtraction 35\" width=\"312\" height=\"49\" \/><\/p>\n<p>Answer:<br \/>\nTotal number of birds now = 8 or Eight.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-4238\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-1st-Grade-Answers-Key-Topic-1-Understand-Addition-and-Subtraction-Lesson-1.1-Add-To-Guided-Practice-2...png\" alt=\"Envision-Math-Common-Core-1st-Grade-Answers-Key-Topic-1-Understand-Addition-and-Subtraction-Lesson 1.1 Add To-Guided Practice-2..\" width=\"365\" height=\"99\" \/><\/p>\n<p>Explanation:<br \/>\nNumber of birds in the given picture = 2 or Two.<br \/>\nNumber of birds more joined = 6 or Six.<br \/>\nTotal number of birds now = Number of birds in the given picture + Number of birds more joined<br \/>\n= 2 + 6<br \/>\n= 8 or Eight.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-4236\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-1st-Grade-Answers-Key-Topic-1-Understand-Addition-and-Subtraction-Lesson-1.1-Add-To-Guided-Practice-2.png\" alt=\"Envision-Math-Common-Core-1st-Grade-Answers-Key-Topic-1-Understand-Addition-and-Subtraction-Lesson 1.1 Add To-Guided Practice-2\" width=\"495\" height=\"350\" \/><\/p>\n<p>&nbsp;<\/p>\n<p>&nbsp;<\/p>\n<p>Question 3.<br \/>\n4 bees<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-1959\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-Grade-1-Answer-Key-Topic-1-Understand-Addition-and-Subtraction-36.png\" alt=\"Envision Math Common Core Grade 1 Answer Key Topic 1 Understand Addition and Subtraction 36\" width=\"118\" height=\"104\" \/><br \/>\n4 bees join<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-1960\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-Grade-1-Answer-Key-Topic-1-Understand-Addition-and-Subtraction-37.png\" alt=\"Envision Math Common Core Grade 1 Answer Key Topic 1 Understand Addition and Subtraction 37\" width=\"129\" height=\"130\" \/><br \/>\nHow many bees now?<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-1961\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-Grade-1-Answer-Key-Topic-1-Understand-Addition-and-Subtraction-38.png\" alt=\"Envision Math Common Core Grade 1 Answer Key Topic 1 Understand Addition and Subtraction 38\" width=\"321\" height=\"55\" \/><br \/>\nAnswer:<br \/>\nTotal number of bees now = 8 or Eight.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-4241\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-1st-Grade-Answers-Key-Topic-1-Understand-Addition-and-Subtraction-Lesson-1.1-Add-To-Guided-Practice-3...png\" alt=\"Envision-Math-Common-Core-1st-Grade-Answers-Key-Topic-1-Understand-Addition-and-Subtraction-Lesson 1.1 Add To-Guided Practice-3..\" width=\"392\" height=\"115\" \/><\/p>\n<p>Explanation:<br \/>\nNumber of bees in the given picture = 4 or Four.<br \/>\nNumber of bees more joined = 4 or Four.<br \/>\nTotal number of bees now = Number of bees in the given picture + Number of bees more joined<br \/>\n= 4 + 4<br \/>\n= 8 or Eight.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-4240\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-1st-Grade-Answers-Key-Topic-1-Understand-Addition-and-Subtraction-Lesson-1.1-Add-To-Guided-Practice-3.png\" alt=\"Envision-Math-Common-Core-1st-Grade-Answers-Key-Topic-1-Understand-Addition-and-Subtraction-Lesson 1.1 Add To-Guided Practice-3\" width=\"397\" height=\"368\" \/><\/p>\n<p>&nbsp;<\/p>\n<p>Question 4.<br \/>\n3 bugs<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-1962\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-Grade-1-Answer-Key-Topic-1-Understand-Addition-and-Subtraction-39.png\" alt=\"Envision Math Common Core Grade 1 Answer Key Topic 1 Understand Addition and Subtraction 39\" width=\"103\" height=\"99\" \/><br \/>\n6 bugs join.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-1964\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-Grade-1-Answer-Key-Topic-1-Understand-Addition-and-Subtraction-40.png\" alt=\"Envision Math Common Core Grade 1 Answer Key Topic 1 Understand Addition and Subtraction 40\" width=\"136\" height=\"143\" \/><br \/>\nHow many bugs now?<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-1966\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-Grade-1-Answer-Key-Topic-1-Understand-Addition-and-Subtraction-41.png\" alt=\"Envision Math Common Core Grade 1 Answer Key Topic 1 Understand Addition and Subtraction 41\" width=\"312\" height=\"55\" \/><br \/>\nAnswer:<br \/>\nTotal number of bugs now = 9 or Nine.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-4242\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-1st-Grade-Answers-Key-Topic-1-Understand-Addition-and-Subtraction-Lesson-1.1-Add-To-Guided-Practice-4.png\" alt=\"Envision-Math-Common-Core-1st-Grade-Answers-Key-Topic-1-Understand-Addition-and-Subtraction-Lesson 1.1 Add To-Guided Practice-4\" width=\"460\" height=\"496\" \/><\/p>\n<p>Explanation:<br \/>\nNumber of bugs in the given picture = 3 or Three.<br \/>\nNumber of bugs more joined = 6 or Six.<br \/>\nTotal number of bugs now = Number of bugs in the given picture + Number of bugs more joined<br \/>\n= 3 + 6<br \/>\n= 9 or Nine.<\/p>\n<p>&nbsp;<\/p>\n<p><strong>Solve the problem.<\/strong><br \/>\nDraw a picture to help.<\/p>\n<p>Question 5.<br \/>\n<strong>Higher Order Thinking<\/strong><br \/>\n6 ducks<br \/>\n4 chickens<br \/>\n2 ducks join.<br \/>\nHow many ducks in all?<br \/>\n_____ ducks in all.<br \/>\nAnswer:<br \/>\nTotal number of ducks now in all = 8 or Eight.<br \/>\n__8___ ducks in all.<\/p>\n<p>Explanation:<br \/>\nNumber of ducks\u00a0 given = 6 or Six.<br \/>\nNumber of chickens given = 4 or Four.<br \/>\nNumber of ducks more joined = 2 or Two.<br \/>\nTotal number of ducks now in all = Number of ducks given + Number of ducks more joined<br \/>\n= 6 + 2<br \/>\n= 8 or Eight.<\/p>\n<p><img loading=\"lazy\" class=\"alignnone size-full wp-image-4595\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-1st-Grade-Answers-Key-Topic-1-Understand-Addition-and-Subtraction-Lesson-1.1-Add-To-Higher-Order-Thinking-5....png\" alt=\"Envision-Math-Common-Core-1st-Grade-Answers-Key-Topic-1-Understand-Addition-and-Subtraction-Lesson 1.1 Add To-Higher Order Thinking-5...\" width=\"544\" height=\"229\" \/>1<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-4243\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-1st-Grade-Answers-Key-Topic-1-Understand-Addition-and-Subtraction-Lesson-1.1-Add-To-Higher-Order-Thinking-5.png\" alt=\"Envision-Math-Common-Core-1st-Grade-Answers-Key-Topic-1-Understand-Addition-and-Subtraction-Lesson 1.1 Add To-Higher Order Thinking-5\" width=\"458\" height=\"280\" \/><\/p>\n<p><strong>Problem Solving<\/strong><br \/>\nSolve each problem.<\/p>\n<p>Question 6.<br \/>\nVocabulary<br \/>\n3 dogs<br \/>\n4 dogs join.<br \/>\nAdd to find the sum.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-1963\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-Grade-1-Answer-Key-Topic-1-Understand-Addition-and-Subtraction-40.1.png\" alt=\"Envision Math Common Core Grade 1 Answer Key Topic 1 Understand Addition and Subtraction 40.1\" width=\"319\" height=\"54\" \/><br \/>\nAnswer:<br \/>\nTotal number of dogs now in all = 7 or Seven.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-4246\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-1st-Grade-Answers-Key-Topic-1-Understand-Addition-and-Subtraction-Lesson-1.1-Add-To-Problem-Solving-6.png\" alt=\"Envision-Math-Common-Core-1st-Grade-Answers-Key-Topic-1-Understand-Addition-and-Subtraction-Lesson 1.1 Add To-Problem Solving-6\" width=\"493\" height=\"336\" \/><\/p>\n<p>Explanation:<br \/>\nNumber of dogs given = 3 or Three.<br \/>\nNumber of dogs more joined = 4 or Four.<br \/>\nTotal number of dogs now in all = Number of dogs given + Number of dogs more joined<br \/>\n= 3 + 4<br \/>\n= 7 or Seven.<\/p>\n<p>&nbsp;<\/p>\n<p>Question 7.<br \/>\n<strong>Model<\/strong><br \/>\n8 cats<br \/>\n1 cat joins.<br \/>\nHow many cats now?<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-1965\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-Grade-1-Answer-Key-Topic-1-Understand-Addition-and-Subtraction-41.1.png\" alt=\"Envision Math Common Core Grade 1 Answer Key Topic 1 Understand Addition and Subtraction 41.1\" width=\"307\" height=\"49\" \/><br \/>\nAnswer:<br \/>\nTotal number of cats now in all = 9 or Nine.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-4598\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-1st-Grade-Answers-Key-Topic-1-Understand-Addition-and-Subtraction-Lesson-1.1-Add-To-Problem-Solving-Model-7...png\" alt=\"Envision-Math-Common-Core-1st-Grade-Answers-Key-Topic-1-Understand-Addition-and-Subtraction-Lesson 1.1 Add To-Problem Solving-Model-7..\" width=\"389\" height=\"101\" \/><\/p>\n<p>Explanation:<br \/>\nNumber of cats given in the picture = 8 or Eight.<br \/>\nNumber of cats more joined = 1 or One.<br \/>\nTotal number of cats now in all = Number of cats given in the picture + Number of cats more joined<br \/>\n= 8 + 1<br \/>\n= 9 or Nine.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-4597\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-1st-Grade-Answers-Key-Topic-1-Understand-Addition-and-Subtraction-Lesson-1.1-Add-To-Problem-Solving-Model-7.png\" alt=\"Envision-Math-Common-Core-1st-Grade-Answers-Key-Topic-1-Understand-Addition-and-Subtraction-Lesson 1.1 Add To-Problem Solving-Model-7\" width=\"611\" height=\"287\" \/><\/p>\n<p>&nbsp;<\/p>\n<p>Question 8.<br \/>\n<strong>Higher Order Thinking<\/strong><br \/>\nMake up an addition story about the birds.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-1967\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-Grade-1-Answer-Key-Topic-1-Understand-Addition-and-Subtraction-42.png\" alt=\"Envision Math Common Core Grade 1 Answer Key Topic 1 Understand Addition and Subtraction 42\" width=\"473\" height=\"418\" \/><br \/>\nAnswer:<br \/>\nThere are 3 birds on a tree sitting. Later 1 bird joined them. How many birds are in all.<br \/>\nTotal number of birds in all now = 4 or Four.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-4599\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-1st-Grade-Answers-Key-Topic-1-Understand-Addition-and-Subtraction-Lesson-1.1-Add-To-Higher-Order-Thinking-8.png\" alt=\"Envision-Math-Common-Core-1st-Grade-Answers-Key-Topic-1-Understand-Addition-and-Subtraction-Lesson 1.1 Add To-Higher Order Thinking-8\" width=\"568\" height=\"475\" \/><\/p>\n<p>Explanation:<br \/>\nNumber of birds sitting on tree = 3 or Three.<br \/>\nNumber of birds joined later = 1 or One.<br \/>\nTotal number of birds in all now = Number of birds sitting on tree + Number of birds joined later<br \/>\n= 3 + 1<br \/>\n= 4 or Four.<\/p>\n<p>&nbsp;<\/p>\n<p>&nbsp;<\/p>\n<p>Question 9.<br \/>\n<strong>Assessment Practice<\/strong><\/p>\n<p>5 frogs<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-1969\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-Grade-1-Answer-Key-Topic-1-Understand-Addition-and-Subtraction-43.png\" alt=\"Envision Math Common Core Grade 1 Answer Key Topic 1 Understand Addition and Subtraction 43\" width=\"130\" height=\"145\" \/><br \/>\n3 frogs join<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-1968\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-Grade-1-Answer-Key-Topic-1-Understand-Addition-and-Subtraction-43.1.png\" alt=\"Envision Math Common Core Grade 1 Answer Key Topic 1 Understand Addition and Subtraction 43.1\" width=\"109\" height=\"149\" \/><br \/>\nHow many frogs now?<br \/>\nA. 5 + 1 = 6 frogs<br \/>\nB. 5 + 2 = 7 frogs<br \/>\nC. 5 + 3 = 8 frogs<br \/>\nD. 5 + 4 = 9 frogs<br \/>\nAnswer:<br \/>\nTotal number of frogs now in all = 8 or Eight.<br \/>\nC. 5 + 3 = 8 frogs.<\/p>\n<p>Explanation:<br \/>\nNumber of frogs given = 5 or Five.<br \/>\nNumber of frogs more joined = 3 or Three.<br \/>\nTotal number of frogs now in all = Number of frogs given + Number of frogs more joined<br \/>\n= 5 + 3<br \/>\n= 8 or Eight.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-4247\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-1st-Grade-Answers-Key-Topic-1-Understand-Addition-and-Subtraction-Lesson-1.1-Add-To-Assessment-Practice-6.png\" alt=\"Envision-Math-Common-Core-1st-Grade-Answers-Key-Topic-1-Understand-Addition-and-Subtraction-Lesson 1.1 Add To-Assessment Practice-6\" width=\"403\" height=\"281\" \/><\/p>\n<p>&nbsp;<\/p>\n<p>&nbsp;<\/p>\n<h3>Lesson 1.2 Put Together<\/h3>\n<p>4 red apples and 4 green apples How many apples in all?<br \/>\nShow how you solve.<br \/>\nUse cubes to help.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-1974\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-Grade-1-Answer-Key-Topic-1-Understand-Addition-and-Subtraction-20.1.png\" alt=\"Envision Math Common Core Grade 1 Answer Key Topic 1 Understand Addition and Subtraction 20.1\" width=\"567\" height=\"450\" \/><\/p>\n<p>___ apples in all<br \/>\nAnswer:<br \/>\nTotal number of apples now in all = 8 or Eight.<br \/>\n_8__ apples in all.<\/p>\n<p>Explanation:<br \/>\nNumber of red apples = 4 or Four.<br \/>\nNumber of green apples = 4 or Four.<br \/>\nTotal number of apples now in all = Number of red apples + Number of green apples<br \/>\n= 4 + 4<br \/>\n= 8 or Eight.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-4601\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-1st-Grade-Answers-Key-Topic-1-Understand-Addition-and-Subtraction-Lesson-1.2-Put-Together.png\" alt=\"Envision-Math-Common-Core-1st-Grade-Answers-Key-Topic-1-Understand-Addition-and-Subtraction-Lesson 1.2 Put Together\" width=\"723\" height=\"647\" \/><\/p>\n<p>&nbsp;<\/p>\n<p><strong>Visual Learning Bridge<\/strong><\/p>\n<p><img loading=\"lazy\" class=\"alignnone size-full wp-image-1975\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-Grade-1-Answer-Key-Topic-1-Understand-Addition-and-Subtraction-20.2.png\" alt=\"Envision Math Common Core Grade 1 Answer Key Topic 1 Understand Addition and Subtraction 20.2\" width=\"978\" height=\"324\" \/><\/p>\n<p><strong>Convince Me!<\/strong><\/p>\n<p>Use cubes.<br \/>\nshow 4 + 2.<br \/>\nThen show 2 + 4.<br \/>\nWhat do you notice?<br \/>\nAnswer:<br \/>\nSum of 4 + 2 = ??<br \/>\n4 + 2 = 6 or Six.<br \/>\nSum of 2 + 4 = ??<br \/>\n2 + 4 = 6 or Six.<\/p>\n<p>It is noticed the sum of (4 + 2) is same as (2 + 4) = 6 or Six.<\/p>\n<p>Explanation:<br \/>\nSum of 4 + 2 = ??<br \/>\n4 + 2 = 6 or Six.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-4832\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-1st-Grade-Answers-Key-Topic-1-Understand-Addition-and-Subtraction-Lesson-1.2-Put-Together-Convince-Me.png\" alt=\"Envision-Math-Common-Core-1st-Grade-Answers-Key-Topic-1-Understand-Addition-and-Subtraction-Lesson 1.2 Put Together-Convince Me!\" width=\"320\" height=\"228\" \/><br \/>\nSum of 2 + 4 = ??<br \/>\n2 + 4 = 6 or Six.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-4833\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-1st-Grade-Answers-Key-Topic-1-Understand-Addition-and-Subtraction-Lesson-1.2-Put-Together-Convince-Me..png\" alt=\"Envision-Math-Common-Core-1st-Grade-Answers-Key-Topic-1-Understand-Addition-and-Subtraction-Lesson 1.2 Put Together-Convince Me.\" width=\"262\" height=\"241\" \/><\/p>\n<p>&nbsp;<\/p>\n<p><strong><br \/>\nGuided Practice<br \/>\n<\/strong>Solve. Use cubes to help. Write an addition equation.<\/p>\n<p>Question 1.<br \/>\n3 yellow birds and 5 blue birds<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-1976\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-Grade-1-Answer-Key-Topic-1-Understand-Addition-and-Subtraction-20.6.png\" alt=\"Envision Math Common Core Grade 1 Answer Key Topic 1 Understand Addition and Subtraction 20.6\" width=\"290\" height=\"115\" \/><br \/>\nHow many birds in all?<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-1977\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-Grade-1-Answer-Key-Topic-1-Understand-Addition-and-Subtraction-20.7.png\" alt=\"Envision Math Common Core Grade 1 Answer Key Topic 1 Understand Addition and Subtraction 20.7\" width=\"276\" height=\"53\" \/><br \/>\nAnswer:<br \/>\nTotal number of birds in all = 8 or Eight.<br \/>\n<img src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-Grade-1-Answer-Key-Topic-1-Understand-Addition-and-Subtraction-20.7.png\" alt=\"Envision Math Common Core Grade 1 Answer Key Topic 1 Understand Addition and Subtraction 20.7\" \/><\/p>\n<p>Explanation:<br \/>\nNumber of yellow birds = 3 or Three.<br \/>\nNumber of blue birds = 5 or Five.<br \/>\nTotal number of birds in all = Number of yellow birds + Number of blue birds<br \/>\n= 3 + 5<br \/>\n= 8 or Eight.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-4835\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-1st-Grade-Answers-Key-Topic-1-Understand-Addition-and-Subtraction-Lesson-1.2-Put-Together-Guided-Practice-1.png\" alt=\"Envision-Math-Common-Core-1st-Grade-Answers-Key-Topic-1-Understand-Addition-and-Subtraction-Lesson 1.2 Put Together-Guided Practice-1\" width=\"382\" height=\"318\" \/><\/p>\n<p>&nbsp;<\/p>\n<p>Question 2.<br \/>\n1 white egg and 6 blue eggs<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-1978\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-Grade-1-Answer-Key-Topic-1-Understand-Addition-and-Subtraction-20.8.png\" alt=\"Envision Math Common Core Grade 1 Answer Key Topic 1 Understand Addition and Subtraction 20.8\" width=\"292\" height=\"100\" \/><br \/>\nHow many eggs in all?<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-1979\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-Grade-1-Answer-Key-Topic-1-Understand-Addition-and-Subtraction-20.9.png\" alt=\"Envision Math Common Core Grade 1 Answer Key Topic 1 Understand Addition and Subtraction 20.9\" width=\"315\" height=\"52\" \/><br \/>\nAnswer:<br \/>\nTotal number of eggs in all = 7 or Seven.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-4836\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-1st-Grade-Answers-Key-Topic-1-Understand-Addition-and-Subtraction-Lesson-1.2-Put-Together-Guided-Practice-2...png\" alt=\"Envision-Math-Common-Core-1st-Grade-Answers-Key-Topic-1-Understand-Addition-and-Subtraction-Lesson 1.2 Put Together-Guided Practice-2..\" width=\"414\" height=\"107\" \/><\/p>\n<p>Explanation:<br \/>\nNumber of white eggs = 1 or One.<br \/>\nNumber of blue eggs = 6 or Six.<br \/>\nTotal number of eggs in all = Number of white eggs + Number of blue eggs<br \/>\n= 1 + 6<br \/>\n= 7 or Seven.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-4837\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-1st-Grade-Answers-Key-Topic-1-Understand-Addition-and-Subtraction-Lesson-1.2-Put-Together-Guided-Practice-2.png\" alt=\"Envision-Math-Common-Core-1st-Grade-Answers-Key-Topic-1-Understand-Addition-and-Subtraction-Lesson 1.2 Put Together-Guided Practice-2\" width=\"345\" height=\"333\" \/><\/p>\n<p><strong><br \/>\nIndependent Practice<br \/>\n<\/strong>Solve. Use cubes or draw a picture. Write an addition equation.<\/p>\n<p>Question 3.<br \/>\n3 little pigs and 4 big pigs<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-1980\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-Grade-1-Answer-Key-Topic-1-Understand-Addition-and-Subtraction-30.1.png\" alt=\"Envision Math Common Core Grade 1 Answer Key Topic 1 Understand Addition and Subtraction 30.1\" width=\"285\" height=\"127\" \/><br \/>\nHow many pigs in all?<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-1981\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-Grade-1-Answer-Key-Topic-1-Understand-Addition-and-Subtraction-30.2.png\" alt=\"Envision Math Common Core Grade 1 Answer Key Topic 1 Understand Addition and Subtraction 30.2\" width=\"301\" height=\"45\" \/><br \/>\nAnswer:<br \/>\nTotal number of pigs in all = 7 or Seven.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-4839\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-1st-Grade-Answers-Key-Topic-1-Understand-Addition-and-Subtraction-Lesson-1.2-Put-Together-Guided-Practice-3...png\" alt=\"Envision-Math-Common-Core-1st-Grade-Answers-Key-Topic-1-Understand-Addition-and-Subtraction-Lesson 1.2 Put Together-Guided Practice-3..\" width=\"363\" height=\"107\" \/><\/p>\n<p>Explanation:<br \/>\nNumber of little pigs = 3 or Three.<br \/>\nNumber of big pigs = 4 or Four.<br \/>\nTotal number of pigs in all = Number of little pigs + Number of big pigs<br \/>\n= 3 + 4<br \/>\n= 7 or Seven.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-4838\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-1st-Grade-Answers-Key-Topic-1-Understand-Addition-and-Subtraction-Lesson-1.2-Put-Together-Guided-Practice-3.png\" alt=\"Envision-Math-Common-Core-1st-Grade-Answers-Key-Topic-1-Understand-Addition-and-Subtraction-Lesson 1.2 Put Together-Guided Practice-3\" width=\"427\" height=\"385\" \/><\/p>\n<p>&nbsp;<\/p>\n<p>&nbsp;<\/p>\n<p>Question 4.<br \/>\n3 box cars and 3 tank cars<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-1982\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-Grade-1-Answer-Key-Topic-1-Understand-Addition-and-Subtraction-30.3.png\" alt=\"Envision Math Common Core Grade 1 Answer Key Topic 1 Understand Addition and Subtraction 30.3\" width=\"224\" height=\"108\" \/><br \/>\nHow many cars in all?<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-1983\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-Grade-1-Answer-Key-Topic-1-Understand-Addition-and-Subtraction-30.4.png\" alt=\"Envision Math Common Core Grade 1 Answer Key Topic 1 Understand Addition and Subtraction 30.4\" width=\"306\" height=\"48\" \/><br \/>\nAnswer:<br \/>\nTotal number of cars in all = 6 or Six.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-4841\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-1st-Grade-Answers-Key-Topic-1-Understand-Addition-and-Subtraction-Lesson-1.2-Put-Together-Guided-Practice-4...png\" alt=\"Envision-Math-Common-Core-1st-Grade-Answers-Key-Topic-1-Understand-Addition-and-Subtraction-Lesson 1.2 Put Together-Guided Practice-4..\" width=\"352\" height=\"90\" \/><\/p>\n<p>Explanation:<br \/>\nNumber of box cars = 3 or Three.<br \/>\nNumber of tank cars = 3 or Three.<br \/>\nTotal number of cars in all = Number of box cars + Number of tank cars<br \/>\n= 3 + 3<br \/>\n= 6 or Six.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-4840\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-1st-Grade-Answers-Key-Topic-1-Understand-Addition-and-Subtraction-Lesson-1.2-Put-Together-Guided-Practice-4.png\" alt=\"Envision-Math-Common-Core-1st-Grade-Answers-Key-Topic-1-Understand-Addition-and-Subtraction-Lesson 1.2 Put Together-Guided Practice-4\" width=\"407\" height=\"205\" \/><\/p>\n<p>&nbsp;<\/p>\n<p>&nbsp;<\/p>\n<p>&nbsp;<\/p>\n<p>Question 5.<br \/>\n<strong>Higher Order Thinking<\/strong><br \/>\n2 red hats<br \/>\n3 shoes<br \/>\n7 blue hats<br \/>\nHow many hats in all?<br \/>\nDraw a picture.<br \/>\nWrite an addition equation.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-1984\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-Grade-1-Answer-Key-Topic-1-Understand-Addition-and-Subtraction-30.5.png\" alt=\"Envision Math Common Core Grade 1 Answer Key Topic 1 Understand Addition and Subtraction 30.5\" width=\"526\" height=\"365\" \/><br \/>\nAnswer:<br \/>\nTotal number of hats in all = 9 or Nine.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-4980\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-1st-Grade-Answers-Key-Topic-1-Understand-Addition-and-Subtraction-Lesson-1.2-Put-Together-Higher-Order-Thinking-5...png\" alt=\"Envision-Math-Common-Core-1st-Grade-Answers-Key-Topic-1-Understand-Addition-and-Subtraction-Lesson 1.2 Put Together-Higher Order Thinking-5..\" width=\"574\" height=\"410\" \/><\/p>\n<p>Explanation:<br \/>\nNumber of red hats = 2 or Two.<br \/>\nNumber of shoes = 3 or Three.<br \/>\nNumber of blue hats = 7 or Seven.<br \/>\nTotal number of hats in all = Number of red hats + Number of blue hats<br \/>\n= 2 + 7<br \/>\n= 9 or Nine.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-4926\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-1st-Grade-Answers-Key-Topic-1-Understand-Addition-and-Subtraction-Lesson-1.2-Put-Together-Higher-Order-Thinking-5.png\" alt=\"Envision-Math-Common-Core-1st-Grade-Answers-Key-Topic-1-Understand-Addition-and-Subtraction-Lesson 1.2 Put Together-Higher Order Thinking-5\" width=\"577\" height=\"253\" \/><\/p>\n<p>&nbsp;<\/p>\n<p><strong><br \/>\nProblem Solving<br \/>\n<\/strong>Solve each problem.<br \/>\nQuestion 6.<br \/>\n<strong>Make Sense<\/strong><br \/>\nJen has 2 red flowers and 5 blue flowers. How many flowers in all? Write an equation.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-1985\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-Grade-1-Answer-Key-Topic-1-Understand-Addition-and-Subtraction-30.6.png\" alt=\"Envision Math Common Core Grade 1 Answer Key Topic 1 Understand Addition and Subtraction 30.6\" width=\"530\" height=\"328\" \/><br \/>\nAnswer:<br \/>\nTotal number of flowers Jen has in all = 7 or Seven.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-4986\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-1st-Grade-Answers-Key-Topic-1-Understand-Addition-and-Subtraction-Lesson-1.2-Put-Together-Problem-Solving-Make-Sense-6.png\" alt=\"Envision-Math-Common-Core-1st-Grade-Answers-Key-Topic-1-Understand-Addition-and-Subtraction-Lesson 1.2 Put Together-Problem Solving-Make Sense-6\" width=\"609\" height=\"629\" \/><\/p>\n<p>Explanation:<br \/>\nNumber of red flowers Jen has = 2 or Two.<br \/>\nNumber of blue flowers Jen has = 5 or Five.<br \/>\nTotal number of flowers Jen has in all = Number of red flowers Jen has + Number of blue flowers Jen has<br \/>\n= 2 + 5<br \/>\n= 7 or Seven.<\/p>\n<p>&nbsp;<\/p>\n<p>&nbsp;<\/p>\n<p>Question 7.<br \/>\n<strong>Higher Order Thinking<\/strong><br \/>\nWrite a picture story. Show blue fish and green fish. Write an addition equation. Tell how many fish in all.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-1986\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-Grade-1-Answer-Key-Topic-1-Understand-Addition-and-Subtraction-30.7.png\" alt=\"Envision Math Common Core Grade 1 Answer Key Topic 1 Understand Addition and Subtraction 30.7\" width=\"415\" height=\"239\" \/><br \/>\nAnswer:<br \/>\nThere are 2 blue fishes in a tank. 2 green fishes were added into the tank. How many fishes are all in the tank.<br \/>\nTotal number of fishes all in the tank = 4 or Four.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-4987\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-1st-Grade-Answers-Key-Topic-1-Understand-Addition-and-Subtraction-Lesson-1.2-Put-Together-Higher-Order-Thinking-7.png\" alt=\"Envision-Math-Common-Core-1st-Grade-Answers-Key-Topic-1-Understand-Addition-and-Subtraction-Lesson 1.2 Put Together-Higher Order Thinking-7\" width=\"603\" height=\"384\" \/><\/p>\n<p>Explanation:<br \/>\nThere are 2 blue fishes in a tank. 2 green fishes were added into the tank. How many fishes are all in the tank.<br \/>\nNumber of blue fishes in the tank = 2 or Two.<br \/>\nNumber of green fishes in the tank = 2 or Two.<br \/>\nTotal number of fishes all in the tank = Number of blue fishes in the tank + Number of green fishes in the tank<br \/>\n= 2 + 2<br \/>\n= 4 or Four.<\/p>\n<p>&nbsp;<\/p>\n<p>Question 8.<br \/>\n<strong>Assessment Practice<\/strong><br \/>\n4 red apples and 5 green apples<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-1987\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-Grade-1-Answer-Key-Topic-1-Understand-Addition-and-Subtraction-30.8.png\" alt=\"Envision Math Common Core Grade 1 Answer Key Topic 1 Understand Addition and Subtraction 30.8\" width=\"268\" height=\"116\" \/><br \/>\nHow many apples in all?<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-1988\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-Grade-1-Answer-Key-Topic-1-Understand-Addition-and-Subtraction-30.9.png\" alt=\"Envision Math Common Core Grade 1 Answer Key Topic 1 Understand Addition and Subtraction 30.9\" width=\"443\" height=\"202\" \/><br \/>\nAnswer:<br \/>\nTotal number of\u00a0 apples in all = 9 or Nine.<br \/>\nB. 4 + 5 = 9 apples.<\/p>\n<p>Explanation:<br \/>\nNumber of red apples = 4 or Four.<br \/>\nNumber of green apples = 5 or Five.<br \/>\nTotal number of\u00a0 apples in all = Number of red apples + Number of green apples<br \/>\n= 4 + 5<br \/>\n= 9 or Nine.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-4988\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-1st-Grade-Answers-Key-Topic-1-Understand-Addition-and-Subtraction-Lesson-1.2-Put-Together-Assessment-Practice-8.png\" alt=\"Envision-Math-Common-Core-1st-Grade-Answers-Key-Topic-1-Understand-Addition-and-Subtraction-Lesson 1.2 Put Together-Assessment Practice-8\" width=\"450\" height=\"230\" \/><\/p>\n<p>&nbsp;<\/p>\n<p>&nbsp;<\/p>\n<p>&nbsp;<\/p>\n<h3>Lesson 1.3 Both Addends Unknown<\/h3>\n<p>Sarah has 5 pencils.<br \/>\nShe puts some in the green cup.<br \/>\nShe puts some in the red cup.<br \/>\nHow many pencils could be in each cup?<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-1989\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-1st-Grade-Answers-Topic-1-Understand-Addition-and-Subtraction-40.2.png\" alt=\"Envision Math Common Core 1st Grade Answers Topic 1 Understand Addition and Subtraction 40.2\" width=\"954\" height=\"433\" \/><\/p>\n<p>Answer:<br \/>\nNumber of pencils Sarah puts in green cup = 3 or Three.<br \/>\nNumber of pencils Sarah puts in red cup = 2 or Two.<\/p>\n<p>Number of pencils Sarah&#8217;s partner puts in green cup = 2 or Two.<br \/>\nNumber of pencils Sarah&#8217;s partner puts in red cup = 3 or Three.<\/p>\n<p>Answers of both are different.<\/p>\n<p>Explanation:<br \/>\nTotal number of pencils Sarah has = 5 or Five.<br \/>\nIF<br \/>\nNumber of pencils Sarah puts in green cup = 3 or Three.<br \/>\nNumber of pencils Sarah puts in red cup = Total number of pencils Sarah has &#8211; Number of pencils Sarah puts in green cup<br \/>\n= 5 &#8211; 3<br \/>\n= 2 or Two.<\/p>\n<p>Total number of pencils Sarah has = 5 or Five.<br \/>\nIF<br \/>\nNumber of pencils Sarah&#8217;s partner puts in green cup = 2 or Two.<br \/>\nNumber of pencils Sarah&#8217;s partner puts in red cup = Total number of pencils Sarah&#8217;s partner has &#8211; Number of pencils Sarah&#8217;s partner puts in green cup<br \/>\n= 5 &#8211; 2<br \/>\n= 3 or Three.<\/p>\n<p>&nbsp;<\/p>\n<p>&nbsp;<\/p>\n<p><strong>Visual Learning Bridge<\/strong><\/p>\n<p><img loading=\"lazy\" class=\"alignnone size-full wp-image-1990\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-1st-Grade-Answers-Topic-1-Understand-Addition-and-Subtraction-40.3.png\" alt=\"Envision Math Common Core 1st Grade Answers Topic 1 Understand Addition and Subtraction 40.3\" width=\"1007\" height=\"315\" \/><\/p>\n<p><strong>Convince Me!<br \/>\n<\/strong>With 7 penguins, could 4 be inside the cave, and 4 be outside the cave? Why or why not?<br \/>\nAnswer:<br \/>\nWith 7 penguins, could 4 be inside the cave, and 4 be outside the cave cannot happen because the total number of penguins count does not match, it shows more (4 + 4 = 8 not 7).<\/p>\n<p>Explanation:<br \/>\nIt cannot happen because the total number of penguins count does not match, it shows more (4 + 4 = 8 not 7).<\/p>\n<p>&nbsp;<\/p>\n<p>&nbsp;<\/p>\n<p><strong>Guided Practice<br \/>\n<\/strong>How many penguins are inside and outside? Use cubes or draw a picture. Write an equation.<br \/>\nAnswer:<br \/>\nCase:1:<br \/>\nNumber of penguins inside the cave = 4 or Four.<br \/>\nNumber of penguins outside the cave = 3 or Three.<br \/>\nCase:2:<br \/>\nNumber of penguins outside the cave = 4 or Four.<br \/>\nNumber of penguins inside the cave = 3 or Three.<\/p>\n<p>Explanation:<br \/>\nCase:1:<br \/>\nNumber of penguins inside the cave = 4 or Four.<br \/>\nNumber of penguins outside the cave = 3 or Three.<br \/>\nTotal number of penguins in all = Number of penguins inside the cave + Number of penguins outside the cave<br \/>\n= 4 + 3<br \/>\n= 7 or Seven.<\/p>\n<p><img loading=\"lazy\" class=\"alignnone size-full wp-image-5049\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-1st-Grade-Answers-Key-Topic-1-Understand-Addition-and-Subtraction-Lesson-1.3-Both-Addends-Unknown-Guided-Practice-1-1.png\" alt=\"Envision-Math-Common-Core-1st-Grade-Answers-Key-Topic-1-Understand-Addition-and-Subtraction-Lesson 1.3 Both Addends Unknown-Guided Practice-\" width=\"358\" height=\"190\" \/><\/p>\n<p>Case:2:<br \/>\nNumber of penguins outside the cave = 4 or Four.<br \/>\nNumber of penguins inside the cave = 3 or Three.<br \/>\nTotal number of penguins in all = Number of penguins inside the cave + Number of penguins outside the cave<br \/>\n= 3 + 4<br \/>\n= 7 or Seven.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-5050\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-1st-Grade-Answers-Key-Topic-1-Understand-Addition-and-Subtraction-Lesson-1.3-Both-Addends-Unknown-Guided-Practice-1.png\" alt=\"Envision-Math-Common-Core-1st-Grade-Answers-Key-Topic-1-Understand-Addition-and-Subtraction-Lesson 1.3 Both Addends Unknown-Guided Practice-1\" width=\"363\" height=\"207\" \/><\/p>\n<p>&nbsp;<\/p>\n<p>&nbsp;<\/p>\n<p>Question 1.<br \/>\n5 penguins in all<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-1991\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-1st-Grade-Answers-Topic-1-Understand-Addition-and-Subtraction-40.4.png\" alt=\"Envision Math Common Core 1st Grade Answers Topic 1 Understand Addition and Subtraction 40.4\" width=\"242\" height=\"201\" \/><br \/>\nAnswer:<br \/>\nTotal number of penguins in all = Number of penguins inside the cave + Number of penguins outside the cave<br \/>\n= 3 + 2<br \/>\n= 5 or Five.<\/p>\n<p>Explanation:<br \/>\nNumber of penguins inside the cave = 3 or Three.<br \/>\nNumber of penguins outside the cave = 2 or Two.<br \/>\nTotal number of penguins in all = Number of penguins inside the cave + Number of penguins outside the cave<br \/>\n= 3 + 2<br \/>\n= 5 or Five.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-5053\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-1st-Grade-Answers-Key-Topic-1-Understand-Addition-and-Subtraction-Lesson-1.3-Both-Addends-Unknown-Guided-Practice-1..-1.png\" alt=\"Envision-Math-Common-Core-1st-Grade-Answers-Key-Topic-1-Understand-Addition-and-Subtraction-Lesson 1.3 Both Addends Unknown-Guided Practice-1..\" width=\"280\" height=\"251\" \/><\/p>\n<p>&nbsp;<\/p>\n<p>&nbsp;<\/p>\n<p>Question 2.<br \/>\n8 penguins in all<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-1992\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-1st-Grade-Answers-Topic-1-Understand-Addition-and-Subtraction-40.5.png\" alt=\"Envision Math Common Core 1st Grade Answers Topic 1 Understand Addition and Subtraction 40.5\" width=\"277\" height=\"197\" \/><br \/>\nAnswer:<br \/>\nTotal number of penguins in all = Number of penguins inside the cave + Number of penguins outside the cave<br \/>\n= 4 + 4<br \/>\n= 8 or Eight.<\/p>\n<p>Explanation:<br \/>\nNumber of penguins inside the cave = 4 or Four.<br \/>\nNumber of penguins outside the cave = 4 or Four.<br \/>\nTotal number of penguins in all = Number of penguins inside the cave + Number of penguins outside the cave<br \/>\n= 4 + 4<br \/>\n= 8 or Eight.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-5052\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-1st-Grade-Answers-Key-Topic-1-Understand-Addition-and-Subtraction-Lesson-1.3-Both-Addends-Unknown-Guided-Practice-2.png\" alt=\"Envision-Math-Common-Core-1st-Grade-Answers-Key-Topic-1-Understand-Addition-and-Subtraction-Lesson 1.3 Both Addends Unknown-Guided Practice-2\" width=\"311\" height=\"237\" \/><\/p>\n<p>&nbsp;<\/p>\n<p>&nbsp;<\/p>\n<p>&nbsp;<\/p>\n<p><strong>Independent Practice<br \/>\n<\/strong>How many bats are inside and outside? Use cubes or draw a picture. Write an equation.<\/p>\n<p>Question 3.<br \/>\n9 bats in all<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-1993\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-1st-Grade-Answers-Topic-1-Understand-Addition-and-Subtraction-40.6.png\" alt=\"Envision Math Common Core 1st Grade Answers Topic 1 Understand Addition and Subtraction 40.6\" width=\"273\" height=\"232\" \/><br \/>\nAnswer:<br \/>\nTotal number of bats in all = Number of bats inside the cave + Number of bats outside the cave<br \/>\n= 5 + 4<br \/>\n= 9 or Nine.<\/p>\n<p>Explanation:<br \/>\nNumber of bats inside the cave = 5 or Five.<br \/>\nNumber of bats outside the cave = 4 or Four.<br \/>\nTotal number of bats in all = Number of bats inside the cave + Number of bats outside the cave<br \/>\n= 5 + 4<br \/>\n= 9 or Nine.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-5054\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-1st-Grade-Answers-Key-Topic-1-Understand-Addition-and-Subtraction-Lesson-1.3-Both-Addends-Unknown-Independent-Practice-3.png\" alt=\"Envision-Math-Common-Core-1st-Grade-Answers-Key-Topic-1-Understand-Addition-and-Subtraction-Lesson 1.3 Both Addends Unknown-Independent Practice-3\" width=\"381\" height=\"282\" \/><\/p>\n<p>Question 4.<br \/>\n8 bats in all<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-1994\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-1st-Grade-Answers-Topic-1-Understand-Addition-and-Subtraction-40.7.png\" alt=\"Envision Math Common Core 1st Grade Answers Topic 1 Understand Addition and Subtraction 40.7\" width=\"284\" height=\"234\" \/><br \/>\nAnswer:<br \/>\nTotal number of bats in all = Number of bats inside the cave + Number of bats outside the cave<br \/>\n= 4 + 4<br \/>\n= 8 or Eight.<\/p>\n<p>Explanation:<br \/>\nNumber of bats inside the cave = 4 or Four.<br \/>\nNumber of bats outside the cave = 4 or Four.<br \/>\nTotal number of bats in all = Number of bats inside the cave + Number of bats outside the cave<br \/>\n= 4 + 4<br \/>\n= 8 or Eight.<\/p>\n<p><img loading=\"lazy\" class=\"alignnone size-full wp-image-5437\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-1st-Grade-Answers-Key-Topic-1-Understand-Addition-and-Subtraction-Lesson-1.3-Both-Addends-Unknown-Independent-Practice-4.png\" alt=\"Envision-Math-Common-Core-1st-Grade-Answers-Key-Topic-1-Understand-Addition-and-Subtraction-Lesson 1.3 Both Addends Unknown-Independent Practice-4\" width=\"408\" height=\"365\" \/><\/p>\n<p>&nbsp;<\/p>\n<p>&nbsp;<\/p>\n<p>Question 5.<br \/>\n5 bats in all<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-1995\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-1st-Grade-Answers-Topic-1-Understand-Addition-and-Subtraction-40.8.png\" alt=\"Envision Math Common Core 1st Grade Answers Topic 1 Understand Addition and Subtraction 40.8\" width=\"276\" height=\"224\" \/><br \/>\nAnswer:<br \/>\nTotal number of bats in all = Number of bats inside the cave + Number of bats outside the cave<br \/>\n= 3 + 2<br \/>\n= 5 or Five.<\/p>\n<p>Explanation:<br \/>\nNumber of bats inside the cave = 3 or Three.<br \/>\nNumber of bats outside the cave = 2 or Two.<br \/>\nTotal number of bats in all = Number of bats inside the cave + Number of bats outside the cave<br \/>\n= 3 + 2<br \/>\n= 5 or Five.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-5438\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-1st-Grade-Answers-Key-Topic-1-Understand-Addition-and-Subtraction-Lesson-1.3-Both-Addends-Unknown-Independent-Practice-5.png\" alt=\"Envision-Math-Common-Core-1st-Grade-Answers-Key-Topic-1-Understand-Addition-and-Subtraction-Lesson 1.3 Both Addends Unknown-Independent Practice-5\" width=\"416\" height=\"282\" \/><\/p>\n<p>&nbsp;<\/p>\n<p>&nbsp;<\/p>\n<p>Question 6.<br \/>\n4 bats in all<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-1996\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-1st-Grade-Answers-Topic-1-Understand-Addition-and-Subtraction-40.9.png\" alt=\"Envision Math Common Core 1st Grade Answers Topic 1 Understand Addition and Subtraction 40.9\" width=\"273\" height=\"218\" \/><br \/>\nAnswer:<br \/>\nTotal number of bats in all = Number of bats inside the cave + Number of bats outside the cave<br \/>\n= 2 + 2<br \/>\n= 4\u00a0 or Four.<\/p>\n<p>Explanation:<br \/>\nNumber of bats inside the cave = 2 or Two.<br \/>\nNumber of bats outside the cave = 2 or Two.<br \/>\nTotal number of bats in all = Number of bats inside the cave + Number of bats outside the cave<br \/>\n= 2 + 2<br \/>\n= 4\u00a0 or Four.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-5441\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-1st-Grade-Answers-Key-Topic-1-Understand-Addition-and-Subtraction-Lesson-1.3-Both-Addends-Unknown-Independent-Practice-6.png\" alt=\"Envision-Math-Common-Core-1st-Grade-Answers-Key-Topic-1-Understand-Addition-and-Subtraction-Lesson 1.3 Both Addends Unknown-Independent Practice-6\" width=\"361\" height=\"309\" \/><\/p>\n<p>&nbsp;<\/p>\n<p><strong>Problem Solving<br \/>\n<\/strong>Solve each problem.<\/p>\n<p>Question 7.<br \/>\nenvision\u00ae STEM<br \/>\n8 monkeys in all. Some live in trees. Some live on the ground. Show one way.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-1997\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-1st-Grade-Answers-Topic-1-Understand-Addition-and-Subtraction-40.10.png\" alt=\"Envision Math Common Core 1st Grade Answers Topic 1 Understand Addition and Subtraction 40.10\" width=\"159\" height=\"162\" \/><br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-1998\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-1st-Grade-Answers-Topic-1-Understand-Addition-and-Subtraction-40.11.png\" alt=\"Envision Math Common Core 1st Grade Answers Topic 1 Understand Addition and Subtraction 40.11\" width=\"341\" height=\"95\" \/><br \/>\nAnswer:<br \/>\nTotal number of monkeys in all = Number of monkeys live in trees + Number of monkeys live on the ground<br \/>\n= 4 + 4<br \/>\n= 8 or Eight.<\/p>\n<p>Explanation:<br \/>\nNumber of monkeys live in trees = 4 or Four.<br \/>\nNumber of monkeys live on the ground =4 or Four.<br \/>\nTotal number of monkeys in all = Number of monkeys live in trees + Number of monkeys live on the ground<br \/>\n= 4 + 4<br \/>\n= 8 or Eight.<\/p>\n<p><img loading=\"lazy\" class=\"alignnone size-full wp-image-5443\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-1st-Grade-Answers-Key-Topic-1-Understand-Addition-and-Subtraction-Lesson-1.3-Both-Addends-Unknown-Problem-Solving-7.png\" alt=\"Envision-Math-Common-Core-1st-Grade-Answers-Key-Topic-1-Understand-Addition-and-Subtraction-Lesson 1.3 Both Addends Unknown-Problem Solving-7\" width=\"416\" height=\"345\" \/><\/p>\n<p>&nbsp;<\/p>\n<p>&nbsp;<\/p>\n<p>Question 8.<br \/>\n<strong>Reasoning<\/strong><br \/>\nAnna draws 2 cats. She draws 5 more cats. How many cats in all? Write an equation.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-1999\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-1st-Grade-Answers-Topic-1-Understand-Addition-and-Subtraction-40.12.png\" alt=\"Envision Math Common Core 1st Grade Answers Topic 1 Understand Addition and Subtraction 40.12\" width=\"176\" height=\"166\" \/><br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-2000\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-1st-Grade-Answers-Topic-1-Understand-Addition-and-Subtraction-40.13.png\" alt=\"Envision Math Common Core 1st Grade Answers Topic 1 Understand Addition and Subtraction 40.13\" width=\"286\" height=\"57\" \/><br \/>\nAnswer:<br \/>\nTotal number of cats Anna draws in all = 7 or Seven.<\/p>\n<p>Explanation:<br \/>\nNumber of cats Anna draws = 2 or Two.<br \/>\nNumber of cats Anna draws more = 5 or Five.<br \/>\nTotal number of cats Anna draws in all = Number of cats Anna draws + Number of cats Anna draws more<br \/>\n= 2 + 5<br \/>\n= 7 or Seven.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-5446\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-1st-Grade-Answers-Key-Topic-1-Understand-Addition-and-Subtraction-Lesson-1.3-Both-Addends-Unknown-Reasoning-8.png\" alt=\"Envision-Math-Common-Core-1st-Grade-Answers-Key-Topic-1-Understand-Addition-and-Subtraction-Lesson 1.3 Both Addends Unknown-Reasoning-8\" width=\"381\" height=\"255\" \/><\/p>\n<p>&nbsp;<\/p>\n<p>&nbsp;<\/p>\n<p>Question 9.<br \/>\n<strong>Higher Order Thinking<\/strong><br \/>\nAndy has 10 balls. 1 or 2 balls are inside the toy box. How many balls are outside the toy box? Tell how you know.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-2001\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-1st-Grade-Answers-Topic-1-Understand-Addition-and-Subtraction-40.14.png\" alt=\"Envision Math Common Core 1st Grade Answers Topic 1 Understand Addition and Subtraction 40.14\" width=\"276\" height=\"386\" \/><br \/>\nAnswer:<br \/>\nTotal number of outside the toy box = 8 or Eight.<\/p>\n<p>Explanation:<br \/>\nNumber of balls Andy has = 10 or Ten.<br \/>\nNumber of balls inside the toy box = 2 or Two.<br \/>\nTotal number of outside the toy box = Number of balls Andy has + Number of balls inside the toy box<br \/>\n= 10 &#8211; 2<br \/>\n= 8 or Eight.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-5455\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-1st-Grade-Answers-Key-Topic-1-Understand-Addition-and-Subtraction-Lesson-1.3-Both-Addends-Unknown-Higher-Order-Thinking-9-1.png\" alt=\"Envision-Math-Common-Core-1st-Grade-Answers-Key-Topic-1-Understand-Addition-and-Subtraction-Lesson 1.3 Both Addends Unknown-Higher Order Thinking-9\" width=\"358\" height=\"340\" \/><\/p>\n<p>&nbsp;<\/p>\n<p>&nbsp;<\/p>\n<p>Question 10.<br \/>\n<strong>Assessment Practice<\/strong><br \/>\n9 birds in all. Some birds are flying. Some birds are in a tree.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-2002\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-1st-Grade-Answers-Topic-1-Understand-Addition-and-Subtraction-40.15.png\" alt=\"Envision Math Common Core 1st Grade Answers Topic 1 Understand Addition and Subtraction 40.15\" width=\"167\" height=\"153\" \/><br \/>\nWhich shows one way?<br \/>\nA. 4 flying, 3 in a tree<br \/>\nB. 5 flying, 4 in a tree<br \/>\nC. 1 flying, 7 in a tree<br \/>\nD. 8 flying, 2 in a tree<br \/>\nAnswer:<br \/>\nTotal number of birds in all = Number of birds flying + Number of birds in a tree<br \/>\n= 5 + 4<br \/>\n= 9 or Nine.<br \/>\nB. 5 flying, 4 in a tree shows one way.<\/p>\n<p>Explanation:<br \/>\nNumber of birds flying = 5 or Five.<br \/>\nNumber of birds in a tree = 4 or Four.<br \/>\nTotal number of birds in all = Number of birds flying + Number of birds in a tree<br \/>\n= 5 + 4<br \/>\n= 9 or Nine.<\/p>\n<p><img loading=\"lazy\" class=\"alignnone size-full wp-image-5460\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-1st-Grade-Answers-Key-Topic-1-Understand-Addition-and-Subtraction-Lesson-1.3-Both-Addends-Unknown-Assessment-Practice-10-1.png\" alt=\"Envision-Math-Common-Core-1st-Grade-Answers-Key-Topic-1-Understand-Addition-and-Subtraction-Lesson 1.3 Both Addends Unknown-Assessment Practice-10\" width=\"293\" height=\"350\" \/><\/p>\n<p>&nbsp;<\/p>\n<p>&nbsp;<\/p>\n<h3>Lesson 1.4 Take from<\/h3>\n<p><strong>Solve and Share<\/strong><\/p>\n<p>There are 6 ducks. Some fly away. How many ducks are left?<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-2003\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-1st-Grade-Answers-Topic-1-Understand-Addition-and-Subtraction-41.1.png\" alt=\"Envision Math Common Core 1st Grade Answers Topic 1 Understand Addition and Subtraction 41.1\" width=\"674\" height=\"524\" \/><br \/>\nAnswer:<br \/>\nNumber of ducks left = 4 or Four.<\/p>\n<p>Explanation:<br \/>\nTotal number of ducks = 6 or Six.<br \/>\nNumber of ducks flying away = 2 or Two.<br \/>\nNumber of ducks left = Total number of ducks &#8211; Number of ducks flying away<br \/>\n= 6 &#8211; 2<br \/>\n= 4 or Four.<\/p>\n<p><img loading=\"lazy\" class=\"alignnone size-full wp-image-5464\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-1st-Grade-Answers-Key-Topic-1-Understand-Addition-and-Subtraction-Lesson-1.4-Take-from-Solve-and-Share.png\" alt=\"Envision-Math-Common-Core-1st-Grade-Answers-Key-Topic-1-Understand-Addition-and-Subtraction-Lesson 1.4 Take from-Solve and Share\" width=\"770\" height=\"650\" \/><\/p>\n<p>&nbsp;<\/p>\n<p>&nbsp;<\/p>\n<p><strong>Visual Learning Bridge<\/strong><\/p>\n<p><img loading=\"lazy\" class=\"alignnone size-full wp-image-2004\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-1st-Grade-Answers-Topic-1-Understand-Addition-and-Subtraction-41.2.png\" alt=\"Envision Math Common Core 1st Grade Answers Topic 1 Understand Addition and Subtraction 41.2\" width=\"975\" height=\"284\" \/><\/p>\n<p><strong>Convince Me!<\/strong><br \/>\nHow do cubes help you solve the problem?<br \/>\nAnswer:<br \/>\nThe cubes strategy is a simple tool that helps in step-by-step calculation of addition or subtraction and to solve the problem asked.<\/p>\n<p>Explanation:<br \/>\nThe cubes strategy is a simple tool that helps in step-by-step calculation of addition or subtraction and to solve the problem asked. It helps in easy calculation\u00a0 and to understand the problem and solve it.<\/p>\n<p>&nbsp;<\/p>\n<p>&nbsp;<\/p>\n<p><strong>Guided Practice<br \/>\n<\/strong>Solve. Use cubes to help. Write a subtraction equation.<\/p>\n<p>Question 1.<br \/>\nThere are 6 frogs. 2 frogs jump off.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-2005\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-1st-Grade-Answers-Topic-1-Understand-Addition-and-Subtraction-41.3.png\" alt=\"Envision Math Common Core 1st Grade Answers Topic 1 Understand Addition and Subtraction 41.3\" width=\"321\" height=\"145\" \/><br \/>\nHow many frogs are left?<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-2006\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-1st-Grade-Answers-Topic-1-Understand-Addition-and-Subtraction-41.4.png\" alt=\"Envision Math Common Core 1st Grade Answers Topic 1 Understand Addition and Subtraction 41.4\" width=\"271\" height=\"60\" \/><br \/>\nAnswer:<br \/>\nNumber of frogs are left = 4 or Four.<\/p>\n<p>Explanation:<br \/>\nTotal number of frogs in all = 6 or Six.<br \/>\nNumber of frogs jump off = 2 Or Two.<br \/>\nNumber of frogs are left = Total number of frogs in all\u00a0 &#8211; Number of frogs jump off<br \/>\n= 6 &#8211; 2<br \/>\n= 4 or Four.<\/p>\n<p><img loading=\"lazy\" class=\"alignnone size-full wp-image-5466\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-1st-Grade-Answers-Key-Topic-1-Understand-Addition-and-Subtraction-Lesson-1.4-Take-from-Guided-Practice.png\" alt=\"Envision-Math-Common-Core-1st-Grade-Answers-Key-Topic-1-Understand-Addition-and-Subtraction-Lesson 1.4 Take from-Guided Practice\" width=\"432\" height=\"375\" \/><\/p>\n<p>&nbsp;<\/p>\n<p>&nbsp;<\/p>\n<p>Question 2.<br \/>\nThere are 7 bunnies. 1 bunny hops away.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-2007\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-1st-Grade-Answers-Topic-1-Understand-Addition-and-Subtraction-41.5.png\" alt=\"Envision Math Common Core 1st Grade Answers Topic 1 Understand Addition and Subtraction 41.5\" width=\"272\" height=\"151\" \/><br \/>\nHow many bunnies are left?<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-2008\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-1st-Grade-Answers-Topic-1-Understand-Addition-and-Subtraction-41.6.png\" alt=\"Envision Math Common Core 1st Grade Answers Topic 1 Understand Addition and Subtraction 41.6\" width=\"339\" height=\"51\" \/><br \/>\nAnswer:<br \/>\nNumber of bunnies are left = 6 or Six.<\/p>\n<p>Explanation:<br \/>\nTotal number of bunnies in all = 7 or Seven.<br \/>\nNumber of bunnies hops away = 1 or One.<br \/>\nNumber of bunnies are left = Total number of bunnies in all &#8211; Number of bunnies hops away<br \/>\n= 7 &#8211; 1<br \/>\n= 6 or Six.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-5467\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-1st-Grade-Answers-Key-Topic-1-Understand-Addition-and-Subtraction-Lesson-1.4-Take-from-Guided-Practice-2.png\" alt=\"Envision-Math-Common-Core-1st-Grade-Answers-Key-Topic-1-Understand-Addition-and-Subtraction-Lesson 1.4 Take from-Guided Practice-2\" width=\"398\" height=\"321\" \/><\/p>\n<p>&nbsp;<\/p>\n<p>&nbsp;<\/p>\n<p><strong>Independent Practice<br \/>\n<\/strong>Solve. Use cubes or draw a picture. Write a subtraction equation.<\/p>\n<p>Question 3.<br \/>\nThere are 8 bugs. 4 bugs fly away.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-2009\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-1st-Grade-Answers-Topic-1-Understand-Addition-and-Subtraction-41.7.png\" alt=\"Envision Math Common Core 1st Grade Answers Topic 1 Understand Addition and Subtraction 41.7\" width=\"291\" height=\"202\" \/><br \/>\nHow many bugs are left?<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-2010\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-1st-Grade-Answers-Topic-1-Understand-Addition-and-Subtraction-41.8.png\" alt=\"Envision Math Common Core 1st Grade Answers Topic 1 Understand Addition and Subtraction 41.8\" width=\"314\" height=\"42\" \/><br \/>\nAnswer:<br \/>\nNumber of bugs are left = 4 or Four.<\/p>\n<p>Explanation:<br \/>\nTotal number of bugs in all = 8 or Eight.<br \/>\nNumber of bugs fly away = 4 or Four.<br \/>\nNumber of bugs are left = Total number of bugs in all &#8211; Number of bugs fly away<br \/>\n= 8 &#8211; 4<br \/>\n= 4 or Four.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-5468\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-1st-Grade-Answers-Key-Topic-1-Understand-Addition-and-Subtraction-Lesson-1.4-Take-from-Independent-Practice-3.png\" alt=\"Envision-Math-Common-Core-1st-Grade-Answers-Key-Topic-1-Understand-Addition-and-Subtraction-Lesson 1.4 Take from-Independent Practice-3\" width=\"380\" height=\"371\" \/><\/p>\n<p>&nbsp;<\/p>\n<p>&nbsp;<\/p>\n<p>Question 4.<br \/>\nThere are 9 cats. 6 cats run away.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-2011\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-1st-Grade-Answers-Topic-1-Understand-Addition-and-Subtraction-41.9.png\" alt=\"Envision Math Common Core 1st Grade Answers Topic 1 Understand Addition and Subtraction 41.9\" width=\"327\" height=\"169\" \/><br \/>\nHow many cats are left?<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-2012\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-1st-Grade-Answers-Topic-1-Understand-Addition-and-Subtraction-41.10.png\" alt=\"Envision Math Common Core 1st Grade Answers Topic 1 Understand Addition and Subtraction 41.10\" width=\"307\" height=\"44\" \/><br \/>\nAnswer:<br \/>\nNumber of cats are left = 3 or Three.<\/p>\n<p>Explanation:<br \/>\nTotal number of cats in all = 9 or Nine.<br \/>\nNumber of cats run away = 6 or Six.<br \/>\nNumber of cats are left = Total number of cats in all &#8211; Number of cats run away<br \/>\n= 9 &#8211; 6<br \/>\n= 3 or Three.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-6217\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-1st-Grade-Answers-Key-Topic-1-Understand-Addition-and-Subtraction-Lesson-1.4-Take-from-Independent-Practice-4-2.png\" alt=\"Envision-Math-Common-Core-1st-Grade-Answers-Key-Topic-1-Understand-Addition-and-Subtraction-Lesson 1.4 Take from-Independent Practice-4\" width=\"440\" height=\"358\" \/><\/p>\n<p>Question 5.<br \/>\n<strong>Higher Order thinking<\/strong><br \/>\nThere are 7 dogs. Some run away. 3 dogs are left. How many dogs ran away.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-2013\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-1st-Grade-Answers-Topic-1-Understand-Addition-and-Subtraction-41.11.png\" alt=\"Envision Math Common Core 1st Grade Answers Topic 1 Understand Addition and Subtraction 41.11\" width=\"232\" height=\"276\" \/><br \/>\n____ dogs<br \/>\nAnswer:<br \/>\nNumber of dogs run away = 4 or Four.<\/p>\n<p>Explanation:<br \/>\nTotal number of dogs in all = 7 or Seven.<br \/>\nNumber of dogs left = 3 or Three.<br \/>\nNumber of dogs run away = Total number of dogs in all &#8211; Number of dogs left<br \/>\n= 7 &#8211; 3<br \/>\n= 4 or Four.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-6218\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-1st-Grade-Answers-Key-Topic-1-Understand-Addition-and-Subtraction-Lesson-1.4-Take-from-Higher-Order-thinking-5.png\" alt=\"Envision-Math-Common-Core-1st-Grade-Answers-Key-Topic-1-Understand-Addition-and-Subtraction-Lesson 1.4 Take from-Higher Order thinking-5\" width=\"482\" height=\"373\" \/><\/p>\n<p>&nbsp;<\/p>\n<p>Problem Solving<br \/>\nSolve each problem.<\/p>\n<p>Question 6.<br \/>\n<strong>Reasoning<\/strong><br \/>\nLin has 9 stamps. She gives away 4 stamps. How many stamps are left?<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-2014\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-1st-Grade-Answers-Topic-1-Understand-Addition-and-Subtraction-41.12.png\" alt=\"Envision Math Common Core 1st Grade Answers Topic 1 Understand Addition and Subtraction 41.12\" width=\"334\" height=\"63\" \/><br \/>\nAnswer:<br \/>\nNumber of stamps left with Lin = 5 or Five.<\/p>\n<p>Explanation:<br \/>\nTotal number of stamps Lin has in all = 9 or Nine.<br \/>\nNumber of stamps Lin gives away = 4 or Four.<br \/>\nNumber of stamps left with Lin = Total number of stamps Lin has in all &#8211; Number of stamps Lin gives away<br \/>\n= 9 &#8211; 4<br \/>\n= 5 or Five.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-6219\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-1st-Grade-Answers-Key-Topic-1-Understand-Addition-and-Subtraction-Lesson-1.4-Take-from-Reasoning-6.png\" alt=\"Envision-Math-Common-Core-1st-Grade-Answers-Key-Topic-1-Understand-Addition-and-Subtraction-Lesson 1.4 Take from-Reasoning-6\" width=\"363\" height=\"277\" \/><\/p>\n<p>&nbsp;<\/p>\n<p>Question 7.<br \/>\n<strong>Reasoning<\/strong><br \/>\nGloria has 8 flowers. She gives away 5 flowers. How many flowers are left?<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-2015\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-1st-Grade-Answers-Topic-1-Understand-Addition-and-Subtraction-41.13.png\" alt=\"Envision Math Common Core 1st Grade Answers Topic 1 Understand Addition and Subtraction 41.13\" width=\"337\" height=\"52\" \/><br \/>\nAnswer:<br \/>\nNumber of flowers left with Gloria = 3 or Three.<\/p>\n<p>Explanation:<br \/>\nTotal number of flowers Gloria has in all = 8 or Eight.<br \/>\nNumber of flowers Gloria gives away = 5 or Five.<br \/>\nNumber of flowers left with Gloria = Total number of flowers Gloria has in all &#8211; Number of flowers Gloria gives away<br \/>\n= 8 &#8211; 5<br \/>\n= 3 or Three.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-6220\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-1st-Grade-Answers-Key-Topic-1-Understand-Addition-and-Subtraction-Lesson-1.4-Take-from-Reasoning-7.png\" alt=\"Envision-Math-Common-Core-1st-Grade-Answers-Key-Topic-1-Understand-Addition-and-Subtraction-Lesson 1.4 Take from-Reasoning- 7\" width=\"363\" height=\"309\" \/><\/p>\n<p>&nbsp;<\/p>\n<p>Question 8.<br \/>\n<strong>Higher Order Thinking<\/strong><br \/>\nFind the missing number. Write a subtraction story for the equation.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-2016\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-1st-Grade-Answers-Topic-1-Understand-Addition-and-Subtraction-41.14.png\" alt=\"Envision Math Common Core 1st Grade Answers Topic 1 Understand Addition and Subtraction 41.14\" width=\"437\" height=\"336\" \/><br \/>\nAnswer:<br \/>\nMrs. Shas has 7 balloons. She gives away 2 balloons. How many balloons are left?<br \/>\nNumber of balloons left with Mrs. Shas = 5 or Five.<\/p>\n<p>Explanation:<br \/>\nMrs. Shas has 7 balloons. She gives away 2 balloons. How many balloons are left?<br \/>\nTotal number of balloons Mrs. Shas has in all = 7 or Seven.<br \/>\nNumber of balloons Mrs. Shas gives away = 2 or Two.<br \/>\nNumber of balloons left with Mrs. Shas = Total number of balloons Mrs. Shas has in all &#8211; Number of balloons Mrs. Shas gives away<br \/>\n= 7 &#8211; 2<br \/>\n= 5 or Five.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-6221\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-1st-Grade-Answers-Key-Topic-1-Understand-Addition-and-Subtraction-Lesson-1.4-Take-from-Higher-Order-Thinking-8.png\" alt=\"Envision-Math-Common-Core-1st-Grade-Answers-Key-Topic-1-Understand-Addition-and-Subtraction-Lesson 1.4 Take from-Higher Order Thinking-8\" width=\"483\" height=\"386\" \/><\/p>\n<p>Question 9.<br \/>\n<strong>Assessment Practice<\/strong><br \/>\nThere are 8 bees. 6 bees fly away. How many bees are left?<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-2017\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-1st-Grade-Answers-Topic-1-Understand-Addition-and-Subtraction-41.15.png\" alt=\"Envision Math Common Core 1st Grade Answers Topic 1 Understand Addition and Subtraction 41.15\" width=\"184\" height=\"180\" \/><br \/>\nA. 8 &#8211; 2 = 6 bees<br \/>\nB. 8 &#8211; 7 = 1 bees<br \/>\nC. 7 &#8211; 2 = 5 bees<br \/>\nD. 8 &#8211; 6 = 2 bees<br \/>\nAnswer:<br \/>\nNumber of bees are left = 2 or Two.<br \/>\nD. 8 &#8211; 6 = 2 bees<\/p>\n<p>Explanation:<br \/>\nTotal number of bees in all = 8 or Eight.<br \/>\nNumber of bees fly away = 6 or Six.<br \/>\nNumber of bees are left = Total number of bees in all &#8211; Number of bees fly away<br \/>\n= 8 &#8211; 6<br \/>\n= 2 or Two.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-6222\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-1st-Grade-Answers-Key-Topic-1-Understand-Addition-and-Subtraction-Lesson-1.4-Take-from-Assessment-Practice-9.png\" alt=\"Envision-Math-Common-Core-1st-Grade-Answers-Key-Topic-1-Understand-Addition-and-Subtraction-Lesson 1.4 Take from-Assessment Practice-9\" width=\"422\" height=\"389\" \/><\/p>\n<h3><\/h3>\n<h3><\/h3>\n<h3>Lesson 1.5 Compare Situations<\/h3>\n<p>There are 5 red cars and 3 blue cars. Are there more red cars or blue cars? How many more? Show how you know.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-2018\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-Grade-1-Answers-Topic-1-Understand-Addition-and-Subtraction-50.1.png\" alt=\"Envision Math Common Core Grade 1 Answers Topic 1 Understand Addition and Subtraction 50.1\" width=\"548\" height=\"523\" \/><br \/>\nAnswer:<br \/>\nThere are 2 red cars more than the blue cars.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-6942\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-1st-Grade-Answers-Key-Topic-1-Understand-Addition-and-Subtraction-Lesson-1.5-Compare-Situations.png\" alt=\"Envision-Math-Common-Core-1st-Grade-Answers-Key-Topic-1-Understand-Addition-and-Subtraction-Lesson 1.5 Compare Situations\" width=\"637\" height=\"590\" \/><\/p>\n<p>Explanation:<br \/>\nNumber of red cars = 5 or Five.<br \/>\nNumber of blue cars = 3 or Three.<br \/>\nDifference = Number of red cars &#8211; Number of blue cars<br \/>\n= 5 &#8211; 3<br \/>\n= 2 or Two.<\/p>\n<p>&nbsp;<\/p>\n<p>&nbsp;<\/p>\n<p><img loading=\"lazy\" class=\"alignnone size-full wp-image-2019\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-Grade-1-Answers-Topic-1-Understand-Addition-and-Subtraction-50.2.png\" alt=\"Envision Math Common Core Grade 1 Answers Topic 1 Understand Addition and Subtraction 50.2\" width=\"973\" height=\"289\" \/><\/p>\n<p><strong>Convince Mel<\/strong><br \/>\nCan you also add to solve the problem above? Explain.<br \/>\nAnswer:<br \/>\nNo, you can not add to solve the problem because you need to find the difference between the blue hats and orange hats to know how many more.<\/p>\n<p>Explanation:<br \/>\nYou need to find the difference between the blue hats and orange hats to know how many more.<\/p>\n<p><strong>Guided Practice<\/strong><br \/>\nUse cubes to help. Write an equation. Then solve.<\/p>\n<p>Question 1.<br \/>\n6 yellow frogs 3 green frogs<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-2020\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-Grade-1-Answers-Topic-1-Understand-Addition-and-Subtraction-50.3.png\" alt=\"Envision Math Common Core Grade 1 Answers Topic 1 Understand Addition and Subtraction 50.3\" width=\"408\" height=\"169\" \/><br \/>\nHow many more yellow frogs than green frogs are there? more yellow frogs<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-2021\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-Grade-1-Answers-Topic-1-Understand-Addition-and-Subtraction-50.4.png\" alt=\"Envision Math Common Core Grade 1 Answers Topic 1 Understand Addition and Subtraction 50.4\" width=\"570\" height=\"51\" \/><br \/>\nAnswer:<br \/>\nThere are 3 yellow frogs more than the green frogs.<\/p>\n<p>Explanation:<br \/>\nNumber of yellow frogs = 6 or Six.<br \/>\nNumber of green frogs = 3 or Three.<br \/>\nDifference = Number of yellow frogs &#8211; Number of green frogs<br \/>\n= 6 &#8211; 3<br \/>\n= 3 or Three.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-6943\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-1st-Grade-Answers-Key-Topic-1-Understand-Addition-and-Subtraction-Lesson-1.5-Compare-Situations-Guided-Practice-1.png\" alt=\"Envision-Math-Common-Core-1st-Grade-Answers-Key-Topic-1-Understand-Addition-and-Subtraction-Lesson 1.5 Compare Situations-Guided Practice-1\" width=\"616\" height=\"392\" \/><\/p>\n<p>&nbsp;<\/p>\n<p><strong>Independent Practice<br \/>\n<\/strong>Use cubes or draw a picture. Write an equation. Then solve.<\/p>\n<p>Question 2.<br \/>\n3 brown dogs I black dog<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-2022\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-Grade-1-Answers-Topic-1-Understand-Addition-and-Subtraction-50.5.png\" alt=\"Envision Math Common Core Grade 1 Answers Topic 1 Understand Addition and Subtraction 50.5\" width=\"335\" height=\"100\" \/><br \/>\nHow many more brown dogs than black dogs are there?<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-2023\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-Grade-1-Answers-Topic-1-Understand-Addition-and-Subtraction-50.6.png\" alt=\"Envision Math Common Core Grade 1 Answers Topic 1 Understand Addition and Subtraction 50.6\" width=\"257\" height=\"52\" \/><br \/>\n____ more brown dogs<br \/>\nAnswer:<br \/>\nThere are 2 brown dogs more than the black dogs.<br \/>\n_2__ more brown dogs.<\/p>\n<p>Explanation:<br \/>\nNumber of brown dogs = 3 or Three.<br \/>\nNumber of black dogs = 1 or One.<br \/>\nDifference = Number of brown dogs &#8211; Number of black dogs<br \/>\n= 3 &#8211; 1<br \/>\n= 2 or Two.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-6944\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-1st-Grade-Answers-Key-Topic-1-Understand-Addition-and-Subtraction-Lesson-1.5-Compare-Situations-Independent-Practice-2.png\" alt=\"Envision-Math-Common-Core-1st-Grade-Answers-Key-Topic-1-Understand-Addition-and-Subtraction-Lesson 1.5 Compare Situations-Independent Practice-2\" width=\"391\" height=\"353\" \/><\/p>\n<p>Question 3.<br \/>\n7 red beads 4 green beads<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-2024\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-Grade-1-Answers-Topic-1-Understand-Addition-and-Subtraction-50.7.png\" alt=\"Envision Math Common Core Grade 1 Answers Topic 1 Understand Addition and Subtraction 50.7\" width=\"314\" height=\"104\" \/><br \/>\nHow many more red beads than green beads are there?<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-2025\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-Grade-1-Answers-Topic-1-Understand-Addition-and-Subtraction-50.8.png\" alt=\"Envision Math Common Core Grade 1 Answers Topic 1 Understand Addition and Subtraction 50.8\" width=\"261\" height=\"54\" \/><br \/>\n___ more red beads<br \/>\nAnswer:<br \/>\nThere are 3 red beads more than the green beads.<\/p>\n<p>Explanation:<br \/>\nNumber of red beads= 7 or Seven.<br \/>\nNumber of green beads = 4 or Four.<br \/>\nDifference = Number of red beads &#8211; Number of green beads<br \/>\n= 7 &#8211; 4<br \/>\n= 3 or Three.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-6945\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-1st-Grade-Answers-Key-Topic-1-Understand-Addition-and-Subtraction-Lesson-1.5-Compare-Situations-Independent-Practice-3.png\" alt=\"Envision-Math-Common-Core-1st-Grade-Answers-Key-Topic-1-Understand-Addition-and-Subtraction-Lesson 1.5 Compare Situations-Independent Practice-3\" width=\"453\" height=\"334\" \/><\/p>\n<p>&nbsp;<\/p>\n<p><strong>Higher Order Thinking<\/strong><\/p>\n<p>There are more blue birds than yellow birds. Write 2 equations to show. Then solve.<\/p>\n<p><img loading=\"lazy\" class=\"alignnone size-full wp-image-2027\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-Grade-1-Answers-Topic-1-Understand-Addition-and-Subtraction-50.10.png\" alt=\"Envision Math Common Core Grade 1 Answers Topic 1 Understand Addition and Subtraction 50.10\" width=\"310\" height=\"285\" \/><\/p>\n<p>Question 4.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-2026\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-Grade-1-Answers-Topic-1-Understand-Addition-and-Subtraction-50.9.png\" alt=\"Envision Math Common Core Grade 1 Answers Topic 1 Understand Addition and Subtraction 50.9\" width=\"541\" height=\"125\" \/><br \/>\nAnswer:<br \/>\nEquation:1:<br \/>\nDifference = Number of blue birds &#8211; Number of yellow birds<br \/>\n= 5 &#8211; 3<br \/>\n= 2 or Two.<\/p>\n<p>Equation:2:<br \/>\nNumber of blue birds\u00a0 = Number of birds flu away + Number of yellow birds<br \/>\n= 2 + 3<br \/>\n= 5 or Five.<\/p>\n<p>Explanation:<br \/>\nEquation:1:<br \/>\nNumber of blue birds = 5 or Five.<br \/>\nNumber of yellow birds = 3 or Three.<br \/>\nDifference = Number of blue birds &#8211; Number of yellow birds<br \/>\n= 5 &#8211; 3<br \/>\n= 2 or Two.<\/p>\n<p>Equation:2:<br \/>\nNumber of birds flu away = 2 or Two.<br \/>\nNumber of yellow birds = 3 or Three.<br \/>\nNumber of blue birds\u00a0 = Number of birds flu away + Number of yellow birds<br \/>\n= 2 + 3<br \/>\n= 5 or Five.<\/p>\n<p><img loading=\"lazy\" class=\"alignnone size-full wp-image-6948\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-1st-Grade-Answers-Key-Topic-1-Understand-Addition-and-Subtraction-Lesson-1.5-Compare-Situations-Higher-Order-Thinking-4.png\" alt=\"Envision-Math-Common-Core-1st-Grade-Answers-Key-Topic-1-Understand-Addition-and-Subtraction-Lesson 1.5 Compare Situations-Higher Order Thinking-4\" width=\"761\" height=\"459\" \/><\/p>\n<p>&nbsp;<\/p>\n<p>Problem Solving<br \/>\nSolve each problem. Use cubes or draw a picture.<\/p>\n<p>Question 5.<br \/>\nNumber Sense 4 fish are in a tank. 2 fish are sold. How many fish are left?<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-2028\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-Grade-1-Answers-Topic-1-Understand-Addition-and-Subtraction-50.11.png\" alt=\"Envision Math Common Core Grade 1 Answers Topic 1 Understand Addition and Subtraction 50.11\" width=\"263\" height=\"93\" \/><br \/>\nAnswer:<br \/>\nNumber of fishes left in the tank = 2 or Two.<\/p>\n<p>Explanation:<br \/>\nNumber of fishes in a tank = 4 or Four.<br \/>\nNumber of fishes sold = 2 or Two.<br \/>\nNumber of fishes left in the tank = Number of fishes in a tank &#8211; Number of fishes sold<br \/>\n= 4 &#8211; 2<br \/>\n= 2 or Two.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-6949\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-1st-Grade-Answers-Key-Topic-1-Understand-Addition-and-Subtraction-Lesson-1.5-Compare-Situations-Problem-Solving-5.png\" alt=\"Envision-Math-Common-Core-1st-Grade-Answers-Key-Topic-1-Understand-Addition-and-Subtraction-Lesson 1.5 Compare Situations-Problem Solving-5\" width=\"374\" height=\"301\" \/><\/p>\n<p>&nbsp;<\/p>\n<p>Question 6.<br \/>\n<strong>Model<\/strong><br \/>\nLuis sees 5 green frogs. He sees I blue frog. How many more green frogs than blue frogs does Luis see?<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-2029\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-Grade-1-Answers-Topic-1-Understand-Addition-and-Subtraction-50.12.png\" alt=\"Envision Math Common Core Grade 1 Answers Topic 1 Understand Addition and Subtraction 50.12\" width=\"259\" height=\"44\" \/><br \/>\n___ more green frogs<br \/>\nAnswer:<br \/>\nThere are 4 green frogs seen by Luis more than the blue frogs seen by her.<br \/>\n_4__ more green frogs.<\/p>\n<p>Explanation:<br \/>\nNumber of green frogs Luis sees = 5 or Five.<br \/>\nNumber of blue frogs Luis sees = 1 or One.<br \/>\nDifference = Number of green frogs Luis sees &#8211; Number of blue frogs Luis sees<br \/>\n= 5 &#8211; 1<br \/>\n= 4 or Four.<\/p>\n<p>&nbsp;<\/p>\n<p>Question 7.<br \/>\n<strong>Higher Order Thinking<\/strong><br \/>\nDraw some yellow flowers. Draw more red flowers than yellow flowers. How many more red flowers than yellow flowers are there?<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-2030\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-Grade-1-Answers-Topic-1-Understand-Addition-and-Subtraction-50.13.png\" alt=\"Envision Math Common Core Grade 1 Answers Topic 1 Understand Addition and Subtraction 50.13\" width=\"412\" height=\"247\" \/><br \/>\nAnswer:<br \/>\nThere are 2 red flowers more than the yellow flowers.<\/p>\n<p>Explanation:<br \/>\nNumber of red flowers = 6 or Six.<br \/>\nNumber of yellow flowers = 4 or Four.<br \/>\nDifference = Number of red flowers &#8211; Number of yellow flowers<br \/>\n= 6 &#8211; 4<br \/>\n= 2 or Two.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-6951\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-1st-Grade-Answers-Key-Topic-1-Understand-Addition-and-Subtraction-Lesson-1.5-Compare-Situations-Higher-Order-Thinking-7.png\" alt=\"Envision-Math-Common-Core-1st-Grade-Answers-Key-Topic-1-Understand-Addition-and-Subtraction-Lesson 1.5 Compare Situations-Higher Order Thinking-7\" width=\"692\" height=\"414\" \/><\/p>\n<p>&nbsp;<\/p>\n<p>Question 8.<br \/>\n<strong>Assessment Practice<\/strong><br \/>\n6 gray cats<br \/>\n4 white cats<br \/>\nHow many more gray cats than white cats are there?<br \/>\nA. 2 more gray cats<br \/>\nB. 4 more gray cats<br \/>\nC. 6 more gray cats<br \/>\nD. 10 more gray cats<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-2031\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-Grade-1-Answers-Topic-1-Understand-Addition-and-Subtraction-50.14.png\" alt=\"Envision Math Common Core Grade 1 Answers Topic 1 Understand Addition and Subtraction 50.14\" width=\"328\" height=\"280\" \/><br \/>\nAnswer:<br \/>\nThere are 2 gray cats more than the white cats.<br \/>\nA. 2 more gray cats<\/p>\n<p>Explanation:<br \/>\nNumber of gray cats = 6 or Six.<br \/>\nNumber of white cats = 4 or Four.<br \/>\nDifference = Number of gray cats &#8211; Number of white cats<br \/>\n= 6 &#8211; 4<br \/>\n= 2 or Two.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-6953\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-1st-Grade-Answers-Key-Topic-1-Understand-Addition-and-Subtraction-Lesson-1.5-Compare-Situations-Assessment-Practice-8.png\" alt=\"Envision-Math-Common-Core-1st-Grade-Answers-Key-Topic-1-Understand-Addition-and-Subtraction-Lesson 1.5 Compare Situations-Assessment Practice-8\" width=\"627\" height=\"312\" \/><\/p>\n<p>&nbsp;<\/p>\n<p>&nbsp;<\/p>\n<p>&nbsp;<\/p>\n<h3>Lesson 1.6 More Compare Situations<\/h3>\n<p><img loading=\"lazy\" class=\"alignnone size-full wp-image-2032\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-Grade-1-Answers-Topic-1-Understand-Addition-and-Subtraction-50.15.png\" alt=\"Envision Math Common Core Grade 1 Answers Topic 1 Understand Addition and Subtraction 50.15\" width=\"181\" height=\"249\" \/><br \/>\nAmy has 7 stickers. Tim has 5 stickers. Who has fewer stickers? How many fewer? Show how you know.<br \/>\nAnswer:<br \/>\nTim has 2 stickers fewer than Amy.<\/p>\n<p>Explanation:<br \/>\nNumber of\u00a0 stickers Amy has = 7 or Seven.<br \/>\nNumber of\u00a0 stickers Tim has = 5 or Five.<br \/>\nDifference = Number of\u00a0 stickers Amy has &#8211; Number of\u00a0 stickers Tim has<br \/>\n= 7 &#8211; 5<br \/>\n= 2 or Two.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-6962\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-1st-Grade-Answers-Key-Topic-1-Understand-Addition-and-Subtraction-Lesson-1.6-More-Compare-Situations.png\" alt=\"Envision-Math-Common-Core-1st-Grade-Answers-Key-Topic-1-Understand-Addition-and-Subtraction-Lesson 1.6 More Compare Situations\" width=\"332\" height=\"264\" \/><\/p>\n<p>&nbsp;<\/p>\n<p>&nbsp;<\/p>\n<p>&nbsp;<\/p>\n<p><strong>Visual Learning Bridge<\/strong><br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-2033\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-Grade-1-Answers-Topic-1-Understand-Addition-and-Subtraction-50.16.png\" alt=\"Envision Math Common Core Grade 1 Answers Topic 1 Understand Addition and Subtraction 50.16\" width=\"970\" height=\"295\" \/><\/p>\n<p><strong>Convince Me!<\/strong><\/p>\n<p>How is finding how many fewer like finding how many more?<br \/>\nAnswer:<br \/>\nFinding how many fewer is same like finding how many more because the process is to find how much and how many.<\/p>\n<p>Explanation:<br \/>\nFinding how many fewer is same like finding how many more because the process is to find how much and how many. They are just in difference of calculation terms one is adding and other is subtracting.<\/p>\n<p>&nbsp;<\/p>\n<p><strong>Guided Practice<br \/>\n<\/strong>Use cubes to help. Write an equation. Then solve.<\/p>\n<p>Question 1.<br \/>\nJuan has 8 red crayons. Sue has 2 blue crayons.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-2034\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-Grade-1-Answers-Topic-1-Understand-Addition-and-Subtraction-50.17.png\" alt=\"Envision Math Common Core Grade 1 Answers Topic 1 Understand Addition and Subtraction 50.17\" width=\"156\" height=\"113\" \/><br \/>\nHow many fewer crayons does Sue have than Juan?<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-2035\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-Grade-1-Answers-Topic-1-Understand-Addition-and-Subtraction-50.18.png\" alt=\"Envision Math Common Core Grade 1 Answers Topic 1 Understand Addition and Subtraction 50.18\" width=\"214\" height=\"86\" \/><br \/>\nAnswer:<br \/>\n6 fewer crayons Sue has than Juan has.<\/p>\n<p>Explanation:<br \/>\nNumber of\u00a0 red crayons Juan has = 8 or Eight.<br \/>\nNumber of\u00a0 blue crayons Sue has = 2 or Two,.<br \/>\nDifference = Number of red crayons Juan has &#8211; Number of blue crayons Sue has<br \/>\n= 8 &#8211; 2<br \/>\n= 6 or Six.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-6961\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-1st-Grade-Answers-Key-Topic-1-Understand-Addition-and-Subtraction-Lesson-1.6-More-Compare-Situations-Guided-Practice-1.png\" alt=\"Envision-Math-Common-Core-1st-Grade-Answers-Key-Topic-1-Understand-Addition-and-Subtraction-Lesson 1.6 More Compare Situations-Guided Practice-1\" width=\"311\" height=\"345\" \/><\/p>\n<p>&nbsp;<\/p>\n<p>Question 2.<br \/>\nAnn has 4 purple grapes. Sam has 7 green grapes.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-2036\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-Grade-1-Answers-Topic-1-Understand-Addition-and-Subtraction-50.19.png\" alt=\"Envision Math Common Core Grade 1 Answers Topic 1 Understand Addition and Subtraction 50.19\" width=\"162\" height=\"111\" \/><br \/>\nHow many fewer grapes does Ann have than Sam?<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-2037\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-Grade-1-Answers-Topic-1-Understand-Addition-and-Subtraction-50.20.png\" alt=\"Envision Math Common Core Grade 1 Answers Topic 1 Understand Addition and Subtraction 50.20\" width=\"257\" height=\"84\" \/><br \/>\nAnswer:<br \/>\n3 fewer grapes Ann have than Sam.<\/p>\n<p>Explanation:<br \/>\nNumber of purple grapes Ann has = 4 or Four.<br \/>\nNumber of green grapes Sam has = 7 or Seven,.<br \/>\nDifference = Number of green grapes Sam has &#8211; Number of purple grapes Ann has<br \/>\n= 7 &#8211; 4<br \/>\n= 3 or Three.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-6963\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-1st-Grade-Answers-Key-Topic-1-Understand-Addition-and-Subtraction-Lesson-1.6-More-Compare-Situations-Guided-Practice-2.png\" alt=\"Envision-Math-Common-Core-1st-Grade-Answers-Key-Topic-1-Understand-Addition-and-Subtraction-Lesson 1.6 More Compare Situations-Guided Practice-2\" width=\"321\" height=\"352\" \/><\/p>\n<p>&nbsp;<\/p>\n<p><strong>Independent Practice<br \/>\n<\/strong>Use cubes or draw a picture. Write an equation. Then solve.<\/p>\n<p>Question 3.<br \/>\nEmma buys 10 red apples. She buys 5 green apples.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-2038\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-Grade-1-Answers-Topic-1-Understand-Addition-and-Subtraction-50.21.png\" alt=\"Envision Math Common Core Grade 1 Answers Topic 1 Understand Addition and Subtraction 50.21\" width=\"372\" height=\"99\" \/><br \/>\nHow many fewer green apples than red apples does Emma buy?<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-2039\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-Grade-1-Answers-Topic-1-Understand-Addition-and-Subtraction-50.22.png\" alt=\"Envision Math Common Core Grade 1 Answers Topic 1 Understand Addition and Subtraction 50.22\" width=\"258\" height=\"93\" \/><br \/>\nAnswer:<br \/>\n5 fewer green apples than red apples Emma buys.<\/p>\n<p>Explanation:<br \/>\nNumber of red apples Emma buys = 10 or Ten.<br \/>\nNumber of green apples Emma buys = 5 or Five.<br \/>\nDifference = Number of red apples Emma buys &#8211; Number of green apples Emma buys<br \/>\n= 10 &#8211; 5<br \/>\n= 5 or Five.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-6964\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-1st-Grade-Answers-Key-Topic-1-Understand-Addition-and-Subtraction-Lesson-1.6-More-Compare-Situations-Independent-Practice-3.png\" alt=\"Envision-Math-Common-Core-1st-Grade-Answers-Key-Topic-1-Understand-Addition-and-Subtraction-Lesson 1.6 More Compare Situations-Independent Practice-3\" width=\"446\" height=\"324\" \/><\/p>\n<p>&nbsp;<\/p>\n<p>Question 4.<br \/>\nBeth writes on 3 cards. Joe writes on 9 cards.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-2040\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-Grade-1-Answers-Topic-1-Understand-Addition-and-Subtraction-50.23.png\" alt=\"Envision Math Common Core Grade 1 Answers Topic 1 Understand Addition and Subtraction 50.23\" width=\"360\" height=\"79\" \/><br \/>\nHow many fewer cards does Beth write on than Joe?<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-2041\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-Grade-1-Answers-Topic-1-Understand-Addition-and-Subtraction-50.24.png\" alt=\"Envision Math Common Core Grade 1 Answers Topic 1 Understand Addition and Subtraction 50.24\" width=\"260\" height=\"92\" \/><br \/>\nAnswer:<br \/>\n6 fewer cards Beth writes on than Joe.<\/p>\n<p>Explanation:<br \/>\nNumber of cards Beth writes = 3 or Three.<br \/>\nNumber of cards Joe writes = 9 or Nine.<br \/>\nDifference = Number of cards Joe writes &#8211; Number of cards Beth writes<br \/>\n= 9 &#8211; 3<br \/>\n= 6 or Six.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-6965\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-1st-Grade-Answers-Key-Topic-1-Understand-Addition-and-Subtraction-Lesson-1.6-More-Compare-Situations-Independent-Practice-4.png\" alt=\"Envision-Math-Common-Core-1st-Grade-Answers-Key-Topic-1-Understand-Addition-and-Subtraction-Lesson 1.6 More Compare Situations-Independent Practice-4\" width=\"432\" height=\"314\" \/><\/p>\n<p>&nbsp;<\/p>\n<p>&nbsp;<\/p>\n<p>Question 5.<br \/>\n<strong>Higher Order Thinking<\/strong><br \/>\nThere are fewer white kites than blue kites. Write 2 equations to show. Then solve.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-2042\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-Grade-1-Answers-Topic-1-Understand-Addition-and-Subtraction-50.25.png\" alt=\"Envision Math Common Core Grade 1 Answers Topic 1 Understand Addition and Subtraction 50.25\" width=\"928\" height=\"309\" \/><br \/>\nAnswer:<br \/>\nEquation:1:<br \/>\nDifference = Number of blue kites &#8211; Number of white kites<br \/>\n= 13 &#8211; 8<br \/>\n= 5 or Five.<\/p>\n<p>Equation:2:<br \/>\nNumber of white kites = Number of blue kites + Difference between the white and blue kites<br \/>\n= 8 + 5<br \/>\n= 13 or Thirteen.<\/p>\n<p>Explanation:<br \/>\nEquation:1:<br \/>\nNumber of white kites = 8 or Eight.<br \/>\nNumber of blue kites = 13 or Thirteen.<br \/>\nDifference = Number of blue kites &#8211; Number of white kites<br \/>\n= 13 &#8211; 8<br \/>\n= 5 or Five.<\/p>\n<p>Equation:2:<br \/>\nNumber of white kites = ??<br \/>\nNumber of blue kites = 13 or Thirteen.<br \/>\nDifference between the white and blue kites = 5 or Five.<br \/>\nNumber of white kites = Number of blue kites + Difference between the white and blue kites<br \/>\n= 8 + 5<br \/>\n= 13 or Thirteen.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-6967\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-1st-Grade-Answers-Key-Topic-1-Understand-Addition-and-Subtraction-Lesson-1.6-More-Compare-Situations-Higher-Order-Thinking-5.png\" alt=\"Envision-Math-Common-Core-1st-Grade-Answers-Key-Topic-1-Understand-Addition-and-Subtraction-Lesson 1.6 More Compare Situations-Higher Order Thinking-5\" width=\"669\" height=\"617\" \/><\/p>\n<p><strong>Problem Solving<br \/>\n<\/strong>Question 6.<br \/>\n<strong>Reasoning<\/strong><br \/>\nLeah has 3 pens. Scott has 6 pens. How many pens do they have in all?<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-2043\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-Grade-1-Answers-Topic-1-Understand-Addition-and-Subtraction-50.26.png\" alt=\"Envision Math Common Core Grade 1 Answers Topic 1 Understand Addition and Subtraction 50.26\" width=\"262\" height=\"85\" \/><br \/>\nAnswer:<br \/>\nTotal number of pens they have in all = 9 or Nine.<\/p>\n<p>Explanation:<br \/>\nNumber of pens Leah has = 3 or Three.<br \/>\nNumber of pens Scott has = 6 or Six.<br \/>\nTotal number of pens they have in all = Number of pens Leah has + Number of pens Scott has<br \/>\n= 3 + 6<br \/>\n= 9 or Nine.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-7004\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-1st-Grade-Answers-Key-Topic-1-Understand-Addition-and-Subtraction-Lesson-1.6-More-Compare-Situations-Problem-Solving-Reasoning-6.png\" alt=\"Envision-Math-Common-Core-1st-Grade-Answers-Key-Topic-1-Understand-Addition-and-Subtraction-Lesson 1.6 More Compare Situations-Problem Solving-Reasoning-6\" width=\"355\" height=\"282\" \/><\/p>\n<p>&nbsp;<\/p>\n<p>&nbsp;<\/p>\n<p>Question 7.<br \/>\n<strong>Reasoning<\/strong><br \/>\nThere are 7 oranges on a branch. 3 oranges fall off.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-2044\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-Grade-1-Answers-Topic-1-Understand-Addition-and-Subtraction-50.27.png\" alt=\"Envision Math Common Core Grade 1 Answers Topic 1 Understand Addition and Subtraction 50.27\" width=\"272\" height=\"104\" \/><br \/>\nHow many oranges are left?<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-2045\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-Grade-1-Answers-Topic-1-Understand-Addition-and-Subtraction-50.28.png\" alt=\"Envision Math Common Core Grade 1 Answers Topic 1 Understand Addition and Subtraction 50.28\" width=\"251\" height=\"84\" \/><br \/>\nAnswer:<br \/>\nNumber of oranges left = 4 or Four.<\/p>\n<p>Explanation:<br \/>\nNumber of oranges on a branch = 7 or Seven<br \/>\nNumber of oranges fell off = 3 or Three.<br \/>\nNumber of oranges left = Number of oranges on a branch &#8211; Number of oranges fell off<br \/>\n= 7 &#8211; 3<br \/>\n= 4 or Four.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-7005\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-1st-Grade-Answers-Key-Topic-1-Understand-Addition-and-Subtraction-Lesson-1.6-More-Compare-Situations-Reasoning-7.png\" alt=\"Envision-Math-Common-Core-1st-Grade-Answers-Key-Topic-1-Understand-Addition-and-Subtraction-Lesson 1.6 More Compare Situations-Reasoning-7\" width=\"291\" height=\"261\" \/><\/p>\n<p>&nbsp;<\/p>\n<p>&nbsp;<\/p>\n<p>Question 8.<br \/>\n<strong>Higher Order Thinking<\/strong><br \/>\nDraw some blue balloons. Draw fewer yellow balloons. How many fewer yellow balloons than blue balloons are there?<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-2046\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-Grade-1-Answers-Topic-1-Understand-Addition-and-Subtraction-50.29.png\" alt=\"Envision Math Common Core Grade 1 Answers Topic 1 Understand Addition and Subtraction 50.29\" width=\"416\" height=\"227\" \/><br \/>\nAnswer:<br \/>\nThere are 2 fewer yellow balloons than blue balloons.<\/p>\n<p>Explanation:<br \/>\nNumber of blue balloons = 5 or Five.<br \/>\nNumber of yellow balloons = 3 or Three.<br \/>\nDifference =\u00a0 Number of blue balloons &#8211; Number of yellow balloons<br \/>\n= 5 &#8211; 3<br \/>\n= 2 or Two.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-7006\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-1st-Grade-Answers-Key-Topic-1-Understand-Addition-and-Subtraction-Lesson-1.6-More-Compare-Situations-Higher-Order-Thinking-8.png\" alt=\"Envision-Math-Common-Core-1st-Grade-Answers-Key-Topic-1-Understand-Addition-and-Subtraction-Lesson 1.6 More Compare Situations-Higher Order Thinking-8\" width=\"545\" height=\"501\" \/><\/p>\n<p>&nbsp;<\/p>\n<p>&nbsp;<\/p>\n<p>Question 9.<br \/>\n<strong>Assessment Practice<\/strong><br \/>\n8 apple trees<br \/>\n6 pear trees<br \/>\nHow many fewer pear trees than apple trees are there?<br \/>\nA. 2 fewer pear trees<br \/>\nB. 3 fewer pear trees<br \/>\nC. 6 fewer pear trees<br \/>\nD. 8 fewer pear trees<br \/>\nAnswer:<br \/>\nThere are 2 fewer pear trees than apple trees.<br \/>\nA. 2 fewer pear trees<\/p>\n<p>Explanation:<br \/>\nNumber of apple trees = 8 or eight.<br \/>\nNumber of \u00a0pear trees = 6 or Six.<br \/>\nDifference =\u00a0 Number of apple trees &#8211; Number of \u00a0pear trees<br \/>\n= 8 &#8211; 6<br \/>\n= 2 or Two.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-7007\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-1st-Grade-Answers-Key-Topic-1-Understand-Addition-and-Subtraction-Lesson-1.6-More-Compare-Situations-Assessment-Practice-9.png\" alt=\"Envision-Math-Common-Core-1st-Grade-Answers-Key-Topic-1-Understand-Addition-and-Subtraction-Lesson 1.6 More Compare Situations-Assessment Practice-9\" width=\"371\" height=\"250\" \/><\/p>\n<p>&nbsp;<\/p>\n<h3>Lesson 1.7 Change Unknown<\/h3>\n<p><strong>Solve and Share<\/strong><\/p>\n<p>There are 5 train cars. More train cars join. Now there are 9 train cars. How many train cars joined?<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-2047\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-Grade-1-Answers-Topic-1-Understand-Addition-and-Subtraction-51.1.png\" alt=\"Envision Math Common Core Grade 1 Answers Topic 1 Understand Addition and Subtraction 51.1\" width=\"718\" height=\"532\" \/><br \/>\n__ trains cars joined.<br \/>\nAnswer:<br \/>\nNumber of trains cars joined = 4 or Four.<br \/>\n__4__ trains cars joined.<\/p>\n<p>Explanation:<br \/>\nNumber of train cars = 5 or Five.<br \/>\nNumber of train cars now = 9 or nine.<br \/>\nNumber of trains cars joined = Number of train cars now &#8211; Number of train cars<br \/>\n= 9 &#8211; 5<br \/>\n= 4 or Four.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-7014\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-1st-Grade-Answers-Key-Topic-1-Understand-Addition-and-Subtraction-Lesson-1.7-Change-Unknown.png\" alt=\"Envision-Math-Common-Core-1st-Grade-Answers-Key-Topic-1-Understand-Addition-and-Subtraction-Lesson 1.7 Change Unknown\" width=\"802\" height=\"575\" \/><\/p>\n<p>&nbsp;<\/p>\n<p><strong>Visual Learning Bridge<\/strong><br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-2048\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-Grade-1-Answers-Topic-1-Understand-Addition-and-Subtraction-51.2.png\" alt=\"Envision Math Common Core Grade 1 Answers Topic 1 Understand Addition and Subtraction 51.2\" width=\"931\" height=\"279\" \/><\/p>\n<p><strong>Convince Me!<\/strong><\/p>\n<p>Can you also subtract to solve the problem above? Explain.<br \/>\nAnswer:<br \/>\nYes, you can subtract to solve the problem above.<br \/>\nNumber of cars = 5 or Five<br \/>\nNumber of cars now = 9 or Nine.<br \/>\nNumber of cars came more = Number of cars now &#8211; Number of cars<br \/>\n= 9 &#8211; 5<br \/>\n= 4 or Four.<\/p>\n<p>Explanation:<br \/>\nNumber of cars = 5 or Five<br \/>\nNumber of cars now = 9 or Nine.<br \/>\nDifference:<br \/>\nNumber of cars came more = Number of cars now &#8211; Number of cars<br \/>\n= 9 &#8211; 5<br \/>\n= 4 or Four.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-7015\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-1st-Grade-Answers-Key-Topic-1-Understand-Addition-and-Subtraction-Lesson-1.7-Change-Unknown-Convince-Me.png\" alt=\"Envision-Math-Common-Core-1st-Grade-Answers-Key-Topic-1-Understand-Addition-and-Subtraction-Lesson 1.7 Change Unknown-Convince Me!\" width=\"425\" height=\"266\" \/><\/p>\n<p>&nbsp;<\/p>\n<p><strong>Guided Practice<br \/>\n<\/strong>Use cubes to help. Write an equation. Then solve.<\/p>\n<p>Question 1.<br \/>\nBobby has 4 fish.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-2049\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-Grade-1-Answers-Topic-1-Understand-Addition-and-Subtraction-51.3.png\" alt=\"Envision Math Common Core Grade 1 Answers Topic 1 Understand Addition and Subtraction 51.3\" width=\"187\" height=\"190\" \/><br \/>\nHe buys more fish. Now he has 7 fish. How many fish did Bobby buy?<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-2050\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-Grade-1-Answers-Topic-1-Understand-Addition-and-Subtraction-51.4.png\" alt=\"Envision Math Common Core Grade 1 Answers Topic 1 Understand Addition and Subtraction 51.4\" width=\"213\" height=\"105\" \/><br \/>\nAnswer:<br \/>\nNumber of fishes Bobby buys = 3 or Three.<\/p>\n<p>Explanation:<br \/>\nNumber of fishes\u00a0Bobby has = 4 or Four.<br \/>\nNumber of fishes Bobby has now = 7 or seven.<br \/>\nNumber of fishes Bobby buys = Number of fishes Bobby has now &#8211; Number of fishes\u00a0Bobby has<br \/>\n= 7 &#8211; 4<br \/>\n= 3 or Three.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-7016\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-1st-Grade-Answers-Key-Topic-1-Understand-Addition-and-Subtraction-Lesson-1.7-Change-Unknown-Guided-Practice-1.png\" alt=\"Envision-Math-Common-Core-1st-Grade-Answers-Key-Topic-1-Understand-Addition-and-Subtraction-Lesson 1.7 Change Unknown-Guided Practice-1\" width=\"320\" height=\"160\" \/><\/p>\n<p>&nbsp;<\/p>\n<p><strong>Independent Practice<\/strong><\/p>\n<p>Use cubes or draw a picture. Write an equation. Then solve.<\/p>\n<p>Question 2.<br \/>\nMary has 4 stickers.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-2051\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-Grade-1-Answers-Topic-1-Understand-Addition-and-Subtraction-51.5.png\" alt=\"Envision Math Common Core Grade 1 Answers Topic 1 Understand Addition and Subtraction 51.5\" width=\"348\" height=\"85\" \/><br \/>\nPat gives her more stickers. Now Mary has 8 stickers. How many stickers did Pat give Mary?<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-2052\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-Grade-1-Answers-Topic-1-Understand-Addition-and-Subtraction-51.6.png\" alt=\"Envision Math Common Core Grade 1 Answers Topic 1 Understand Addition and Subtraction 51.6\" width=\"258\" height=\"75\" \/><br \/>\nAnswer:<br \/>\nNumber of stickers Pat gives her more = 4 or Four.<\/p>\n<p>Explanation:<br \/>\nNumber of stickers Mary has = 4 or Four.<br \/>\nNumber of stickers Mary has now = 8 or Eight.<br \/>\nNumber of stickers Pat gives her more = Number of stickers Mary has now &#8211; Number of stickers Mary has<br \/>\n= 8 &#8211; 4<br \/>\n= 4 or Four.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-7017\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-1st-Grade-Answers-Key-Topic-1-Understand-Addition-and-Subtraction-Lesson-1.7-Change-Unknown-Independent-Practice-2.png\" alt=\"Envision-Math-Common-Core-1st-Grade-Answers-Key-Topic-1-Understand-Addition-and-Subtraction-Lesson 1.7 Change Unknown-Independent Practice-2\" width=\"375\" height=\"252\" \/><\/p>\n<p>&nbsp;<\/p>\n<p>&nbsp;<\/p>\n<p>Question 3.<br \/>\nBilly draws 4 red cars.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-2053\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-Grade-1-Answers-Topic-1-Understand-Addition-and-Subtraction-51.7.png\" alt=\"Envision Math Common Core Grade 1 Answers Topic 1 Understand Addition and Subtraction 51.7\" width=\"403\" height=\"103\" \/><br \/>\nThen he draws some blue cars. Now there are 10 cars. How many blue cars did Billy draw?<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-2054\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-Grade-1-Answers-Topic-1-Understand-Addition-and-Subtraction-51.8.png\" alt=\"Envision Math Common Core Grade 1 Answers Topic 1 Understand Addition and Subtraction 51.8\" width=\"256\" height=\"77\" \/><br \/>\nAnswer:<br \/>\nNumber of blue cars Billy draws = 6 or Six.<\/p>\n<p>Explanation:<br \/>\nNumber of red cars Billy draws = 4 or Four.<br \/>\nNumber of cars Billy has now = 10 or Ten.<br \/>\nNumber of blue cars Billy draws = Number of cars Billy has now &#8211; Number of red cars Billy draws<br \/>\n= 10 &#8211; 4<br \/>\n= 6 or Six.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-7018\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-1st-Grade-Answers-Key-Topic-1-Understand-Addition-and-Subtraction-Lesson-1.7-Change-Unknown-Independent-Practice-3.png\" alt=\"Envision-Math-Common-Core-1st-Grade-Answers-Key-Topic-1-Understand-Addition-and-Subtraction-Lesson 1.7 Change Unknown-Independent Practice-3\" width=\"355\" height=\"224\" \/><\/p>\n<p>&nbsp;<\/p>\n<p>Question 4.<br \/>\n<strong>Higher Order Thinking<\/strong><br \/>\nSome girls are on the bus. 2 boys get on the bus. Now there are 7 children on the bus. How many girls are on the bus? Write 2 equations to show. Then solve.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-2055\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-Grade-1-Answers-Topic-1-Understand-Addition-and-Subtraction-51.9.png\" alt=\"Envision Math Common Core Grade 1 Answers Topic 1 Understand Addition and Subtraction 51.9\" width=\"417\" height=\"272\" \/><br \/>\nAnswer:<br \/>\nEquation:1:<br \/>\nNumber of girls are on the bus = Number of children on the bus now &#8211; Number of boys get on the bus<br \/>\n= 7 &#8211; 2<br \/>\n= 5 or Five.<\/p>\n<p>Equation:2:<br \/>\nNumber of children on the bus now = Number of boys get on the bus + Number of girls are on the bus<br \/>\n=&gt; 7 = 2 + Number of girls are on the bus<br \/>\n=&gt; 7 &#8211; 2 = Number of girls are on the bus<br \/>\n=&gt; 5 or Five = Number of girls are on the bus.<\/p>\n<p>Explanation:<br \/>\nEquation:1:<br \/>\nNumber of boys get on the bus = 2 or Two.<br \/>\nNumber of children on the bus now =7 or Seven.<br \/>\nNumber of girls are on the bus = Number of children on the bus now &#8211; Number of boys get on the bus<br \/>\n= 7 &#8211; 2<br \/>\n= 5 or Five.<\/p>\n<p>Equation:2:<br \/>\nNumber of children on the bus now =7 or Seven.<br \/>\nNumber of boys get on the bus = 2 or Two.<br \/>\nNumber of girls are on the bus = ??<br \/>\nNumber of children on the bus now = Number of boys get on the bus + Number of girls are on the bus<br \/>\n=&gt; 7 = 2 + Number of girls are on the bus<br \/>\n=&gt; 7 &#8211; 2 = Number of girls are on the bus<br \/>\n=&gt; 5 = Number of girls are on the bus.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-7020\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-1st-Grade-Answers-Key-Topic-1-Understand-Addition-and-Subtraction-Lesson-1.7-Change-Unknown-Higher-Order-Thinking-4.png\" alt=\"Envision-Math-Common-Core-1st-Grade-Answers-Key-Topic-1-Understand-Addition-and-Subtraction-Lesson 1.7 Change Unknown-Higher Order Thinking-4\" width=\"562\" height=\"562\" \/><\/p>\n<p>&nbsp;<\/p>\n<p><strong>Problem Solving<br \/>\n<\/strong>Solve each problem.<\/p>\n<p>Question 5.<br \/>\n6 pencils are on the desk.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-2056\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-Grade-1-Answers-Topic-1-Understand-Addition-and-Subtraction-51.10.png\" alt=\"Envision Math Common Core Grade 1 Answers Topic 1 Understand Addition and Subtraction 51.10\" width=\"366\" height=\"82\" \/><br \/>\nBob adds more pencils. Now there are 9 pencils. How many pencils did Bob add?<br \/>\nAnswer:<br \/>\nNumber of pencils Bob added more = 3 or Three.<\/p>\n<p>Explanation:<br \/>\nNumber of pencils are on the desk = 6 or Six.<br \/>\nNumber of pencils now = 9 or Nine.<br \/>\nNumber of pencils Bob added more = Number of pencils now &#8211; Number of pencils are on the desk<br \/>\n= 9 &#8211; 6<br \/>\n= 3 or Three.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-7037\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-1st-Grade-Answers-Key-Topic-1-Understand-Addition-and-Subtraction-Lesson-1.7-Change-Unknown-Problem-Solving-5.png\" alt=\"Envision-Math-Common-Core-1st-Grade-Answers-Key-Topic-1-Understand-Addition-and-Subtraction-Lesson 1.7 Change Unknown-Problem Solving-5\" width=\"392\" height=\"204\" \/><\/p>\n<p>&nbsp;<\/p>\n<p>Question 6.<br \/>\n<strong>Use Tools<\/strong><br \/>\nNora has 3 pretzels and 7 crackers. How many snacks does she have in all?<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-2057\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-Grade-1-Answers-Topic-1-Understand-Addition-and-Subtraction-51.11.png\" alt=\"Envision Math Common Core Grade 1 Answers Topic 1 Understand Addition and Subtraction 51.11\" width=\"401\" height=\"321\" \/><br \/>\nAnswer:<br \/>\nNumber of snacks Nora has in all = 10 or Ten.<\/p>\n<p>Explanation:<br \/>\nNumber of pretzels Nora has = 3 or Three.<br \/>\nNumber of crackers Nora has = 7 or Seven.<br \/>\nNumber of snacks Nora has in all = Number of pretzels Nora has + Number of crackers Nora has<br \/>\n= 3 + 7<br \/>\n= 10 or Ten.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-7038\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-1st-Grade-Answers-Key-Topic-1-Understand-Addition-and-Subtraction-Lesson-1.7-Change-Unknown-Use-Tools-6.png\" alt=\"Envision-Math-Common-Core-1st-Grade-Answers-Key-Topic-1-Understand-Addition-and-Subtraction-Lesson 1.7 Change Unknown-Use Tools-6\" width=\"434\" height=\"437\" \/><\/p>\n<p>Question 7.<br \/>\n<strong>Higher Order Thinking<\/strong><br \/>\nSome yellow birds are in a tree. Some blue birds join them. Now there are 5 birds in the tree. How many yellow birds and blue birds could there be?<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-2058\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-Grade-1-Answers-Topic-1-Understand-Addition-and-Subtraction-51.12.png\" alt=\"Envision Math Common Core Grade 1 Answers Topic 1 Understand Addition and Subtraction 51.12\" width=\"255\" height=\"56\" \/><br \/>\n___ yellow birds and _____ blue birds<br \/>\nAnswer:<br \/>\nCase:1: _2__ yellow birds and _3____ blue birds<br \/>\nTotal number of birds in a tree = Number of yellow birds in a tree + Number of blue birds joined them<br \/>\n= 2 + 3<br \/>\n= 5 or Five.<\/p>\n<p>Case:2: __3__ yellow birds and __2___ blue birds<br \/>\nTotal number of birds in a tree = Number of yellow birds in a tree + Number of blue birds joined them<br \/>\n= 3 + 2<br \/>\n= 5 or Five.<\/p>\n<p>Explanation:<br \/>\nCase:1:<br \/>\nNumber of yellow birds in a tree = 2 or Two.<br \/>\nNumber of blue birds joined them = 3 or Three.<br \/>\nTotal number of birds in a tree = Number of yellow birds in a tree + Number of blue birds joined them<br \/>\n= 2 + 3<br \/>\n= 5 or Five.<\/p>\n<p>Case:2:<br \/>\nNumber of yellow birds in a tree= 3 or Three.<br \/>\nNumber of blue birds joined them \u00a0= 2 or Two.<br \/>\nTotal number of birds in a tree = Number of yellow birds in a tree + Number of blue birds joined them<br \/>\n= 3 + 2<br \/>\n= 5 or Five.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-7039\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-1st-Grade-Answers-Key-Topic-1-Understand-Addition-and-Subtraction-Lesson-1.7-Change-Unknown-Higher-Order-Thinking-7.png\" alt=\"Envision-Math-Common-Core-1st-Grade-Answers-Key-Topic-1-Understand-Addition-and-Subtraction-Lesson 1.7 Change Unknown-Higher Order Thinking-7\" width=\"363\" height=\"293\" \/><\/p>\n<p>&nbsp;<\/p>\n<p>Question 8.<br \/>\n<strong>Assessment Practice<\/strong><br \/>\n4 puppies play. More puppies join them. Now there are 7 puppies. How many puppies joined?<br \/>\nA. 5 puppies<br \/>\nB. 4 puppies<br \/>\nC. 3 puppies<br \/>\nD. 2 puppies<br \/>\nAnswer:<br \/>\nTotal number of puppies joined = 3 or Three.<br \/>\nC. 3 puppies<\/p>\n<p>Explanation:<br \/>\nNumber of puppies play = 4 or Four.<br \/>\nNumber of puppies now\u00a0 = 7 or Seven.<br \/>\nTotal number of puppies joined = Number of puppies now + Number of puppies play<br \/>\n= 7 &#8211; 4<br \/>\n= 3 or Three.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-7040\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-1st-Grade-Answers-Key-Topic-1-Understand-Addition-and-Subtraction-Lesson-1.7-Change-Unknown-Assessment-Practice-8.png\" alt=\"Envision-Math-Common-Core-1st-Grade-Answers-Key-Topic-1-Understand-Addition-and-Subtraction-Lesson 1.7 Change Unknown-Assessment Practice-8\" width=\"327\" height=\"208\" \/><\/p>\n<p>&nbsp;<\/p>\n<p>&nbsp;<\/p>\n<h3>Lesson 1.8 Practice Adding and Subtracting<\/h3>\n<p><strong>Solve &amp; Share<\/strong><\/p>\n<p>5 pebbles are brown. The other pebbles are black. There are 7 pebbles in all. How many black pebbles are there?<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-2060\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-Grade-1-Answers-Topic-1-Understand-Addition-and-Subtraction-60.1.png\" alt=\"Envision Math Common Core Grade 1 Answers Topic 1 Understand Addition and Subtraction 60.1\" width=\"909\" height=\"678\" \/><\/p>\n<p>Answer:<br \/>\nNumber of black pebbles = 2 or Two.<\/p>\n<p>Explanation:<br \/>\nNumber of brown pebbles = 5 or Five.<br \/>\nNumber of pebbles in all = 7 or Seven.<br \/>\nNumber of black pebbles =\u00a0 Number of pebbles in all &#8211; Number of brown pebbles<br \/>\n= 7 &#8211; 5<br \/>\n= 2 or Two.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-7222\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-1st-Grade-Answers-Key-Topic-1-Understand-Addition-and-Subtraction-Lesson-1.8-Practice-Adding-and-Subtracting.png\" alt=\"Envision-Math-Common-Core-1st-Grade-Answers-Key-Topic-1-Understand-Addition-and-Subtraction-Lesson 1.8 Practice Adding and Subtracting\" width=\"814\" height=\"639\" \/><\/p>\n<p>&nbsp;<\/p>\n<p><strong>Visual Learning Bridge<\/strong><br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-2061\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-Grade-1-Answers-Topic-1-Understand-Addition-and-Subtraction-60.2.png\" alt=\"Envision Math Common Core Grade 1 Answers Topic 1 Understand Addition and Subtraction 60.2\" width=\"971\" height=\"290\" \/><\/p>\n<p><strong>Convince Me!<\/strong><br \/>\nCompare the addition and subtraction equations. What do you notice about the numbers?<\/p>\n<p>Answer:<br \/>\nIts noticed that both the addition equation and subtraction equation results of finding the girls strength are same.<\/p>\n<p>Explanation:<br \/>\nAddition equation:<br \/>\nNumber of boys in the class = 5 or Five.<br \/>\nTotal number of students in the class = 8 or Eight.<br \/>\nNumber of girls in the class + Number of boys in the class = Total number of students in the class<br \/>\n=&gt; ?? + 5 = 8.<br \/>\n=&gt; 3 + 5 = 8<\/p>\n<p>Subtraction equation:<br \/>\nNumber of boys in the class = 5 or Five.<br \/>\nTotal number of students in the class = 8 or Eight.<br \/>\nNumber of girls in the class = Total number of students in the class &#8211; Number of boys in the class<br \/>\n= 8 &#8211; 5<br \/>\n= 3 or Three.<\/p>\n<p>&nbsp;<\/p>\n<p><strong>Guided Practice<br \/>\n<\/strong>Use cubes to help.<br \/>\nWrite an equation. Then solve.<\/p>\n<p>Question 1.<br \/>\nNick has 9 robots. 3 of the robots can talk.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-2062\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-Grade-1-Answers-Topic-1-Understand-Addition-and-Subtraction-60.3.png\" alt=\"Envision Math Common Core Grade 1 Answers Topic 1 Understand Addition and Subtraction 60.3\" width=\"372\" height=\"170\" \/><br \/>\nHow many robots cannot talk?<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-2063\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-Grade-1-Answers-Topic-1-Understand-Addition-and-Subtraction-60.4.png\" alt=\"Envision Math Common Core Grade 1 Answers Topic 1 Understand Addition and Subtraction 60.4\" width=\"224\" height=\"78\" \/><br \/>\nAnswer:<br \/>\nNumber of robots cannot walk = 6 or Six.<\/p>\n<p>Explanation:<br \/>\nNumber of robots Nick has = 9 or Nine.<br \/>\nNumber of robots can walk = 3 or Three.<br \/>\nNumber of robots Nick has = Number of robots can walk + Number of robots cannot walk<br \/>\n=&gt; 9 = 3 + ??<br \/>\n=&gt; 9 = 3 + 6<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-7260\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-1st-Grade-Answers-Key-Topic-1-Understand-Addition-and-Subtraction-Lesson-1.8-Practice-Adding-and-Subtracting-Guided-Practice-1.png\" alt=\"Envision-Math-Common-Core-1st-Grade-Answers-Key-Topic-1-Understand-Addition-and-Subtraction-Lesson 1.8 Practice Adding and Subtracting-Guided Practice-1\" width=\"318\" height=\"304\" \/><\/p>\n<p>Question 2.<br \/>\n6 children play at the beach. 2 children are girls.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-2064\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-Grade-1-Answers-Topic-1-Understand-Addition-and-Subtraction-60.5.png\" alt=\"Envision Math Common Core Grade 1 Answers Topic 1 Understand Addition and Subtraction 60.5\" width=\"240\" height=\"162\" \/><br \/>\nHow many are boys?<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-2065\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-Grade-1-Answers-Topic-1-Understand-Addition-and-Subtraction-60.6.png\" alt=\"Envision Math Common Core Grade 1 Answers Topic 1 Understand Addition and Subtraction 60.6\" width=\"236\" height=\"74\" \/><br \/>\nAnswer:<br \/>\nNumber of boys playing at the beach = 4 or Four.<\/p>\n<p>Explanation:<br \/>\nNumber of girls playing at the beach = 2 or Two.<br \/>\nTotal number of children playing at the beach = 6 or Six.<br \/>\nNumber of boys playing at the beach = Total number of children playing at the beach &#8211; Number of girls playing at the beach<br \/>\n= 6 &#8211; 2<br \/>\n= 4 or Four.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-7261\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-1st-Grade-Answers-Key-Topic-1-Understand-Addition-and-Subtraction-Lesson-1.8-Practice-Adding-and-Subtracting-Guided-Practice-2.png\" alt=\"Envision-Math-Common-Core-1st-Grade-Answers-Key-Topic-1-Understand-Addition-and-Subtraction-Lesson 1.8 Practice Adding and Subtracting-Guided Practice-2\" width=\"305\" height=\"249\" \/><\/p>\n<p>&nbsp;<\/p>\n<p>&nbsp;<\/p>\n<p><strong>Independent Practice<br \/>\n<\/strong>Use cubes or draw a picture. Write an equation. Then solve.<\/p>\n<p>Question 3.<br \/>\nJill has 9 cards. 5 cards are soccer cards.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-2066\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-Grade-1-Answers-Topic-1-Understand-Addition-and-Subtraction-60.7.png\" alt=\"Envision Math Common Core Grade 1 Answers Topic 1 Understand Addition and Subtraction 60.7\" width=\"298\" height=\"124\" \/><br \/>\nThe rest are baseball cards. How many baseball cards are there?<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-2067\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-Grade-1-Answers-Topic-1-Understand-Addition-and-Subtraction-60.8.png\" alt=\"Envision Math Common Core Grade 1 Answers Topic 1 Understand Addition and Subtraction 60.8\" width=\"265\" height=\"86\" \/><br \/>\n___ baseball cards<br \/>\nAnswer:<br \/>\nNumber of baseball cards = 4 or Four.<br \/>\n__4__ baseball cards.<\/p>\n<p>Explanation:<br \/>\nTotal number of cards Jill has = 9\u00a0 or Nine.<br \/>\nNumber of soccer cards = 5 or Five.<br \/>\nNumber of baseball cards = Total number of cards Jill has &#8211; Number of soccer cards<br \/>\n= 9 &#8211; 5<br \/>\n= 4 or Four.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-7262\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-1st-Grade-Answers-Key-Topic-1-Understand-Addition-and-Subtraction-Lesson-1.8-Practice-Adding-and-Subtracting-Independent-Practice-3.png\" alt=\"Envision-Math-Common-Core-1st-Grade-Answers-Key-Topic-1-Understand-Addition-and-Subtraction-Lesson 1.8 Practice Adding and Subtracting-Independent Practice-3\" width=\"321\" height=\"256\" \/><\/p>\n<p>&nbsp;<\/p>\n<p>&nbsp;<\/p>\n<p>Question 4.<br \/>\nRita has 7 Shells.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-2068\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-Grade-1-Answers-Topic-1-Understand-Addition-and-Subtraction-60.9.png\" alt=\"Envision Math Common Core Grade 1 Answers Topic 1 Understand Addition and Subtraction 60.9\" width=\"152\" height=\"125\" \/><br \/>\n3 shells are big. The rest are small. How many small shells does Rita have?<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-2069\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-Grade-1-Answers-Topic-1-Understand-Addition-and-Subtraction-60.10.png\" alt=\"Envision Math Common Core Grade 1 Answers Topic 1 Understand Addition and Subtraction 60.10\" width=\"264\" height=\"87\" \/><br \/>\n__ small shells<br \/>\nAnswer:<br \/>\nNumber of shells are small = 4 or Four.<br \/>\n_4_ small shells.<\/p>\n<p>Explanation:<br \/>\nNumber of shells are big = 3 or Three.<br \/>\nTotal number of shells Rita has = 7 or Seven.<br \/>\nNumber of shells are small = Total number of shells Rita has &#8211; Number of shells are big<br \/>\n= 7 &#8211; 3<br \/>\n= 4 or Four.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-7263\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-1st-Grade-Answers-Key-Topic-1-Understand-Addition-and-Subtraction-Lesson-1.8-Practice-Adding-and-Subtracting-Independent-Practice-4.png\" alt=\"Envision-Math-Common-Core-1st-Grade-Answers-Key-Topic-1-Understand-Addition-and-Subtraction-Lesson 1.8 Practice Adding and Subtracting-Independent Practice-4\" width=\"291\" height=\"257\" \/><\/p>\n<p>&nbsp;<\/p>\n<p>&nbsp;<\/p>\n<p>Question 5.<br \/>\n<strong>Higher Order Thinking<\/strong><br \/>\nHenry has 6 candles on his cake. I candle is green. The rest are blue. How many blue candles are there? Write 2 equations to show. Then solve.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-2070\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-Grade-1-Answers-Topic-1-Understand-Addition-and-Subtraction-60.11.png\" alt=\"Envision Math Common Core Grade 1 Answers Topic 1 Understand Addition and Subtraction 60.11\" width=\"449\" height=\"263\" \/><br \/>\nAnswer:<br \/>\nEquation:1:<br \/>\nNumber of blue candles = Total number of candles on Henry cake &#8211; Number of green candles<br \/>\n= 6 &#8211; 1<br \/>\n= 5 or five.<\/p>\n<p>Equation:2:<br \/>\nNumber of green candles\u00a0 + Number of blue candles = Total number of candles on Henry cake<br \/>\n=&gt; 1 + ?? = 6<br \/>\n=&gt; 1 + 5 = 6.<\/p>\n<p>Number of blue candles = 5 or five.<\/p>\n<p>Explanation:<br \/>\nEquation:1:<br \/>\nNumber of green candles = 1 or One.<br \/>\nTotal number of candles on Henry cake = 6 or Six.<br \/>\nNumber of blue candles = Total number of candles on Henry cake &#8211; Number of green candles<br \/>\n= 6 &#8211; 1<br \/>\n= 5 or five.<\/p>\n<p>Equation:2:<br \/>\nNumber of green candles = 1 or One.<br \/>\nTotal number of candles on Henry cake = 6 or Six.<br \/>\nNumber of green candles\u00a0 + Number of blue candles = Total number of candles on Henry cake<br \/>\n=&gt; 1 + ?? = 6<br \/>\n=&gt; 1 + 5 = 6.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-7264\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-1st-Grade-Answers-Key-Topic-1-Understand-Addition-and-Subtraction-Lesson-1.8-Practice-Adding-and-Subtracting-Higher-Order-Thinking-5.png\" alt=\"Envision-Math-Common-Core-1st-Grade-Answers-Key-Topic-1-Understand-Addition-and-Subtraction-Lesson 1.8 Practice Adding and Subtracting-Higher Order Thinking-5\" width=\"532\" height=\"522\" \/><\/p>\n<p>&nbsp;<\/p>\n<p>&nbsp;<\/p>\n<p><strong>Problem Solving<br \/>\n<\/strong>Solve each problem.<\/p>\n<p>Question 6.<br \/>\n<strong>Make Sense<\/strong><br \/>\nJoe buys 2 red fish. He buys some blue fish. He buys 9 fish in all. How many blue fish does Joe buy?<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-2071\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-Grade-1-Answers-Topic-1-Understand-Addition-and-Subtraction-60.12.png\" alt=\"Envision Math Common Core Grade 1 Answers Topic 1 Understand Addition and Subtraction 60.12\" width=\"263\" height=\"65\" \/><br \/>\n____ blue fish<br \/>\nAnswer:<br \/>\nNumber of blue fishes Joe buys = 7 or Seven.<br \/>\n__7__ blue fish.<\/p>\n<p>Explanation:<br \/>\nNumber of red fishes Joe buys = 2\u00a0 or Two.<br \/>\nTotal number of fishes Joe buys in all\u00a0 = 9 or Nine.<br \/>\nNumber of blue fishes Joe buys = Total number of fishes Joe buys in all &#8211; Number of red fishes Joe buys<br \/>\n= 9 &#8211; 2<br \/>\n= 7 or Seven.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-7266\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-1st-Grade-Answers-Key-Topic-1-Understand-Addition-and-Subtraction-Lesson-1.8-Practice-Adding-and-Subtracting-Problem-Solving-6.png\" alt=\"Envision-Math-Common-Core-1st-Grade-Answers-Key-Topic-1-Understand-Addition-and-Subtraction-Lesson 1.8 Practice Adding and Subtracting-Problem Solving-6\" width=\"376\" height=\"297\" \/><\/p>\n<p>&nbsp;<\/p>\n<p>Question 7.<br \/>\n<strong>Make Sense<\/strong><br \/>\nRachel has 8 nickels. She gives away 4 nickels. How many nickels are left?<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-2072\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-Grade-1-Answers-Topic-1-Understand-Addition-and-Subtraction-60.13.png\" alt=\"Envision Math Common Core Grade 1 Answers Topic 1 Understand Addition and Subtraction 60.13\" width=\"260\" height=\"63\" \/><br \/>\n__ nickels<br \/>\nAnswer:<br \/>\nNumber of nickels left = 4 or Four.<br \/>\n__4__ nickels.<\/p>\n<p>Explanation:<br \/>\nNumber of nickels Rachel gives away = 4 or Four.<br \/>\nTotal number of nickels Rachel has in all\u00a0 = 8 or Eight.<br \/>\nNumber of nickels left = Total number of nickels Rachel has in all\u00a0 &#8211; Number of nickels Rachel gives away<br \/>\n= 8 &#8211; 4<br \/>\n= 4 or Four.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-7268\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-1st-Grade-Answers-Key-Topic-1-Understand-Addition-and-Subtraction-Lesson-1.8-Practice-Adding-and-Subtracting-Make-Sense-7.png\" alt=\"Envision-Math-Common-Core-1st-Grade-Answers-Key-Topic-1-Understand-Addition-and-Subtraction-Lesson 1.8 Practice Adding and Subtracting-Make Sense-7\" width=\"319\" height=\"257\" \/><\/p>\n<p>Question 8.<br \/>\n<strong>Higher Order Thinking<\/strong><br \/>\nNina has 8 stuffed animals. Some are bears. Some are tigers. How many of each animal could Nina have?<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-2073\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-Grade-1-Answers-Topic-1-Understand-Addition-and-Subtraction-60.14.png\" alt=\"Envision Math Common Core Grade 1 Answers Topic 1 Understand Addition and Subtraction 60.14\" width=\"266\" height=\"44\" \/><br \/>\n__ bears and __ tigers<br \/>\nAnswer:<br \/>\nNina can have 4 bears and 4 tigers each.<br \/>\n_4_ bears and _4_ tigers.<\/p>\n<p>Explanation:<br \/>\nTotal number of stuffed animals Nina has = 8 or Eight.<br \/>\nNumber of bears + Number of tigers = Total\u00a0 number of stuffed animals Nina has<br \/>\n=&gt; ?? + ?? = 8<br \/>\n=&gt; 4 + 4 = 8.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-7269\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-1st-Grade-Answers-Key-Topic-1-Understand-Addition-and-Subtraction-Lesson-1.8-Practice-Adding-and-Subtracting-Higher-Order-Thinking-8.png\" alt=\"Envision-Math-Common-Core-1st-Grade-Answers-Key-Topic-1-Understand-Addition-and-Subtraction-Lesson 1.8 Practice Adding and Subtracting-Higher Order Thinking-8\" width=\"314\" height=\"175\" \/><\/p>\n<p>Question 9.<br \/>\n<strong>Assessment Practice<\/strong><br \/>\nLiz and Mary have 7 fish in all. Liz has 2 fish. How many fish does Mary have? Which equation matches the story?<br \/>\nA. 9 &#8211; 2 = 7 fish<br \/>\nB. 7 &#8211; 1 = 6 fish<br \/>\nC. 7 &#8211; 2 = 5 fish<br \/>\nD. 8 &#8211; 7 = 1 fish<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-2074\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-Grade-1-Answers-Topic-1-Understand-Addition-and-Subtraction-60.15.png\" alt=\"Envision Math Common Core Grade 1 Answers Topic 1 Understand Addition and Subtraction 60.15\" width=\"158\" height=\"204\" \/><br \/>\nAnswer:<br \/>\nNumber of fishes Mary has = 5 or Five.<br \/>\nC. 7 &#8211; 2 = 5 fish<\/p>\n<p>Explanation:<br \/>\nNumber of fishes Liz has = 2 or Two.<br \/>\nNumber of fishes Liz and Mary have in all = 7 or Seven.<br \/>\nNumber of fishes Mary has = Number of fishes Liz and Mary have in all &#8211; Number of fishes Liz has<br \/>\n= 7 &#8211; 2<br \/>\n= 5 or Five.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-7385\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-1st-Grade-Answers-Key-Topic-1-Understand-Addition-and-Subtraction-Lesson-1.8-Practice-Adding-and-Subtracting-Assessment-Practice-9.png\" alt=\"Envision-Math-Common-Core-1st-Grade-Answers-Key-Topic-1-Understand-Addition-and-Subtraction-Lesson 1.8 Practice Adding and Subtracting-Assessment Practice-9\" width=\"299\" height=\"213\" \/><\/p>\n<p>&nbsp;<\/p>\n<h3>Lesson 1.9 Construct Arguments<\/h3>\n<p>Do you add or subtract to solve the problem? Tell why. Show how to solve. Use pictures, numbers, or words<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-2075\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-1st-Grade-Answer-Key-Topic-1-Understand-Addition-and-Subtraction-70.1.png\" alt=\"Envision Math Common Core 1st Grade Answer Key Topic 1 Understand Addition and Subtraction 70.1\" width=\"671\" height=\"653\" \/><\/p>\n<p>Answer:<br \/>\nNumber of more rabbits than turtles = 4 or Four.<\/p>\n<p>Explanation:<br \/>\nNumber of rabbits = 7 or Seven.<br \/>\nNumber of turtles = 3 or Three.<br \/>\nNumber of more rabbits than turtles = Number of rabbits &#8211; Number of turtles<br \/>\n= 7 &#8211; 3<br \/>\n= 4 or Four.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-7387\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-1st-Grade-Answers-Key-Topic-1-Understand-Addition-and-Subtraction-Lesson-1.9-Construct-Arguments-1.png\" alt=\"Envision-Math-Common-Core-1st-Grade-Answers-Key-Topic-1-Understand-Addition-and-Subtraction-Lesson 1.9 Construct Arguments\" width=\"742\" height=\"706\" \/><\/p>\n<p>&nbsp;<\/p>\n<p>&nbsp;<\/p>\n<p><strong>Thinking Habits<\/strong><br \/>\nHow can I use math to explain my work?<br \/>\nIs my explanation clear?<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-2076\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-1st-Grade-Answer-Key-Topic-1-Understand-Addition-and-Subtraction-70.2.png\" alt=\"Envision Math Common Core 1st Grade Answer Key Topic 1 Understand Addition and Subtraction 70.2\" width=\"118\" height=\"120\" \/><br \/>\nAnswer:<br \/>\nI can use math to explain my work by taking the support of pictures ,diagrams to explain to solve the problem in a simple and easy way.<br \/>\nYes, my is explanation clear.<\/p>\n<p>Explanation:<br \/>\nI can use math to explain my work by taking the support of pictures ,diagrams to explain to solve the problem in a simple and easy way.<br \/>\nYes, my is explanation clear because it is simple and easy to understand.<\/p>\n<p>&nbsp;<\/p>\n<p><strong>Visual Learning Bridge<\/strong><br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-2077\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-1st-Grade-Answer-Key-Topic-1-Understand-Addition-and-Subtraction-70.3.png\" alt=\"Envision Math Common Core 1st Grade Answer Key Topic 1 Understand Addition and Subtraction 70.3\" width=\"971\" height=\"282\" \/><\/p>\n<p><strong>Convince Me!<\/strong><\/p>\n<p>Look at the two ways to find the number of red crayons. How are the ways alike? How are the ways different?<\/p>\n<p>Answer:<br \/>\nThe two ways to find the number of red crayons are alike because the process is done to find the count how many are red crayons. The ways are different because the process differs as one is addition and other is subtraction.<\/p>\n<p>Explanation:<br \/>\nWay:1:<br \/>\nNumber of blue crayons = 6 or Six.<br \/>\nTotal number of crayons in all = 9 or Nine.<br \/>\nNumber of red crayons = Total number of crayons in all &#8211; Number of blue crayons<br \/>\n= 9 &#8211; 6<br \/>\n= 3 or Three.<\/p>\n<p>Way:2:<br \/>\nNumber of blue crayons = 6 or Six.<br \/>\nTotal number of crayons in all = 9 or Nine.<br \/>\nNumber of red crayons + Number of blue crayons = Total number of crayons in all<br \/>\n=&gt; ?? + 6 = 9<br \/>\n=&gt; 3 + 6 = 9.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-7405\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-1st-Grade-Answers-Key-Topic-1-Understand-Addition-and-Subtraction-Lesson-1.9-Construct-Arguments-Convince-Me.png\" alt=\"Envision-Math-Common-Core-1st-Grade-Answers-Key-Topic-1-Understand-Addition-and-Subtraction-Lesson 1.9 Construct Arguments-Convince Me!\" width=\"290\" height=\"382\" \/><\/p>\n<p>&nbsp;<\/p>\n<p>&nbsp;<\/p>\n<p><strong>Guided Practice<br \/>\n<\/strong>Solve. Use pictures, numbers, or words to explain.<\/p>\n<p>Question 1.<br \/>\nManny draws 6 tiles. 4 tiles are red. The others are green. How many green tiles does Manny draw?<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-2078\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-1st-Grade-Answer-Key-Topic-1-Understand-Addition-and-Subtraction-70.4.png\" alt=\"Envision Math Common Core 1st Grade Answer Key Topic 1 Understand Addition and Subtraction 70.4\" width=\"418\" height=\"70\" \/><br \/>\nAnswer:<br \/>\nNumber of green tiles Manny draws = 2 or Two.<\/p>\n<p>Explanation:<br \/>\nNumber of tiles Manny draws = 6 or Six.<br \/>\nNumber of red tiles Manny draws = 4 or Four.<br \/>\nNumber of green tiles Manny draws = Number of tiles Manny draws &#8211; Number of red tiles<br \/>\n= 6 &#8211; 4<br \/>\n= 2 or Two.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-7404\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-1st-Grade-Answers-Key-Topic-1-Understand-Addition-and-Subtraction-Lesson-1.9-Construct-Arguments-Guided-Practice-1.png\" alt=\"Envision-Math-Common-Core-1st-Grade-Answers-Key-Topic-1-Understand-Addition-and-Subtraction-Lesson 1.9 Construct Arguments-Guided Practice-1\" width=\"295\" height=\"216\" \/><\/p>\n<p>&nbsp;<\/p>\n<p><strong>Independent Practice<br \/>\n<\/strong>Solve. Use pictures, numbers, or words to explain.<\/p>\n<p>Question 2.<br \/>\nJan has 8 pennies. She spends 5 pennies. How many pennies does Jan have left?<br \/>\nAnswer:<br \/>\nNumber of pennies left = 3 or Three.<\/p>\n<p>Explanation:<br \/>\nNumber of pennies Jan has = 8 or Eight.<br \/>\nNumber of pennies Jan spends = 5 or Five.<br \/>\nNumber of pennies left = Number of pennies Jan has &#8211; Number of pennies Jan spends<br \/>\n= 8 &#8211; 5<br \/>\n= 3 or Three.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-7406\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-1st-Grade-Answers-Key-Topic-1-Understand-Addition-and-Subtraction-Lesson-1.9-Construct-Arguments-Independent-Practice-2.png\" alt=\"Envision-Math-Common-Core-1st-Grade-Answers-Key-Topic-1-Understand-Addition-and-Subtraction-Lesson 1.9 Construct Arguments-Independent Practice-2\" width=\"286\" height=\"253\" \/><\/p>\n<p>&nbsp;<\/p>\n<p>Question 3.<br \/>\nLidia has 7 pencils. Jon has 2 pencils. Who has fewer pencils? How many fewer?<br \/>\nAnswer:<br \/>\nJon has fewer pencils by 5 or five.<\/p>\n<p>Explanation:<br \/>\nNumber of \u00a0pencils Lidia has = 7 or Seven<br \/>\nNumber of pencils Jon has = 2 or Two.<br \/>\nDifference =Number of \u00a0pencils Lidia has &#8211; Number of pencils Jon has<br \/>\n= 7 &#8211; 2<br \/>\n= 5 or Five.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-7407\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-1st-Grade-Answers-Key-Topic-1-Understand-Addition-and-Subtraction-Lesson-1.9-Construct-Arguments-Independent-Practice-3.png\" alt=\"Envision-Math-Common-Core-1st-Grade-Answers-Key-Topic-1-Understand-Addition-and-Subtraction-Lesson 1.9 Construct Arguments-Independent Practice-3\" width=\"291\" height=\"256\" \/><\/p>\n<p>&nbsp;<\/p>\n<p>&nbsp;<\/p>\n<p>Question 4.<br \/>\n<strong>Higher Order Thinking<\/strong><br \/>\nMax has 3 apples. He buys 2 more apples. He gives away 4 apples. How many apples does Max have left? Explain.<br \/>\nAnswer:<br \/>\nNumber of apples left = 1 or One.<\/p>\n<p>Explanation:<br \/>\nNumber of apples Max has = 3 or Three.<br \/>\nNumber of more apples Max buys = 2 or Two.<br \/>\nTotal number of apples Max has = Number of apples Max has + Number of more apples Max buys<br \/>\n= 3 + 2<br \/>\n= 5 or Five.<\/p>\n<p>Number of apples Max gives away = 4 or Four.<br \/>\nNumber of apples left = Total number of apples Max has &#8211; Number of apples Max gives away<br \/>\n= 5 &#8211; 4<br \/>\n= 1 or One.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-7408\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-1st-Grade-Answers-Key-Topic-1-Understand-Addition-and-Subtraction-Lesson-1.9-Construct-Arguments-Higher-Order-Thinking-4.png\" alt=\"Envision-Math-Common-Core-1st-Grade-Answers-Key-Topic-1-Understand-Addition-and-Subtraction-Lesson 1.9 Construct Arguments-Higher Order Thinking-4\" width=\"327\" height=\"319\" \/><\/p>\n<p>&nbsp;<\/p>\n<p><strong>Problem Solving<br \/>\n<\/strong><strong>Performance Task<br \/>\n<\/strong><strong>Lemonade Stand<\/strong><br \/>\nSome friends sell lemonade. Solve each problem. Use pictures, numbers, or words to explain.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-2079\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-1st-Grade-Answer-Key-Topic-1-Understand-Addition-and-Subtraction-70.5.png\" alt=\"Envision Math Common Core 1st Grade Answer Key Topic 1 Understand Addition and Subtraction 70.5\" width=\"389\" height=\"218\" \/><\/p>\n<p>Question 5.<br \/>\nExplain<br \/>\nAlex sells 3 cups. Mark sells 5 cups. How many cups do they sell in all? Here is Alex\u2019s work.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-2080\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-1st-Grade-Answer-Key-Topic-1-Understand-Addition-and-Subtraction-70.6.png\" alt=\"Envision Math Common Core 1st Grade Answer Key Topic 1 Understand Addition and Subtraction 70.6\" width=\"212\" height=\"158\" \/><br \/>\nIs his work correct? Tell why.<br \/>\nAnswer:<br \/>\nTotal number of cups sold in all = 8 or Eight.<br \/>\nHis work is correct has the answer is correct.<\/p>\n<p>Explanation:<br \/>\nNumber of cups Alex sells = 3 or Three.<br \/>\nNumber of cups Mark sells = 5 or Five.<br \/>\nTotal number of cups sold in all = Number of cups Alex sells + Number of cups Mark sells<br \/>\n= 3 + 5<br \/>\n= 8 or Eight.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-7410\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-1st-Grade-Answers-Key-Topic-1-Understand-Addition-and-Subtraction-Lesson-1.9-Construct-Arguments-Problem-Solving-5.png\" alt=\"Envision-Math-Common-Core-1st-Grade-Answers-Key-Topic-1-Understand-Addition-and-Subtraction-Lesson 1.9 Construct Arguments-Problem Solving-5\" width=\"282\" height=\"156\" \/><\/p>\n<p>&nbsp;<\/p>\n<p>&nbsp;<\/p>\n<p>Question 6.<br \/>\n<strong>Be Precise<\/strong><br \/>\nMia sells 2 cups.<br \/>\nGina sells 6 cups.<br \/>\nHow many more cups does Gina sell than Mia?<br \/>\nAnswer:<br \/>\n4 more cups Gina sells than Mia.<\/p>\n<p>Explanation:<br \/>\nNumber of cups Mia sells = 2 or Two.<br \/>\nNumber of cups Gina sells = 6 or Six.<br \/>\nDifference =\u00a0Number of cups Gina sells &#8211; Number of cups Mia sells<br \/>\n= 6 &#8211; 2<br \/>\n= 4 or Four.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-7411\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-1st-Grade-Answers-Key-Topic-1-Understand-Addition-and-Subtraction-Lesson-1.9-Construct-Arguments-Be-Precise-6.png\" alt=\"Envision-Math-Common-Core-1st-Grade-Answers-Key-Topic-1-Understand-Addition-and-Subtraction-Lesson 1.9 Construct Arguments-Be Precise-6\" width=\"308\" height=\"188\" \/><\/p>\n<p>&nbsp;<\/p>\n<h3>Fluency Review Activity<\/h3>\n<p>Color these sums and differences. Leave the rest white.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-2086\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-1st-Grade-Answer-Key-Topic-1-Understand-Addition-and-Subtraction-86.0.png\" alt=\"Envision Math Common Core 1st Grade Answer Key Topic 1 Understand Addition and Subtraction 86.0\" width=\"874\" height=\"603\" \/><br \/>\nAnswer:<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-8656\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-1st-Grade-Answers-Key-Topic-1-Understand-Addition-and-Subtraction-Lesson-1.9-Construct-Arguments-Fluency-Review-Activity.png\" alt=\"Envision-Math-Common-Core-1st-Grade-Answers-Key-Topic-1-Understand-Addition-and-Subtraction-Lesson 1.9 Construct Arguments-Fluency Review Activity\" width=\"967\" height=\"701\" \/><\/p>\n<p><strong>Vocabulary Review<\/strong><br \/>\nUnderstand Vocabulary<\/p>\n<p>Question 1.<br \/>\nWrite an addition equation<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-2087\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-1st-Grade-Answer-Key-Topic-1-Understand-Addition-and-Subtraction-86.1.png\" alt=\"Envision Math Common Core 1st Grade Answer Key Topic 1 Understand Addition and Subtraction 86.1\" width=\"249\" height=\"67\" \/><br \/>\nAnswer:<br \/>\nAddition equation:<br \/>\n2\u00a0 +\u00a0 2\u00a0 =\u00a0 4.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-8659\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-1st-Grade-Answers-Key-Topic-1-Understand-Addition-and-Subtraction-Lesson-1.9-Construct-Arguments-Fluency-Review-Activity-Vocabulary-Review-1-1.png\" alt=\"Envision-Math-Common-Core-1st-Grade-Answers-Key-Topic-1-Understand-Addition-and-Subtraction-Lesson 1.9 Construct Arguments-Fluency Review Activity-Vocabulary Review-1\" width=\"967\" height=\"668\" \/><\/p>\n<p>Explanation:<br \/>\nAddition equation:<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-7412\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-1st-Grade-Answers-Key-Topic-1-Understand-Addition-and-Subtraction-Lesson-1.9-Construct-Arguments-Fluency-Review-Activity-Vocabulary-Review-1.png\" alt=\"Envision-Math-Common-Core-1st-Grade-Answers-Key-Topic-1-Understand-Addition-and-Subtraction-Lesson 1.9 Construct Arguments-Fluency Review Activity-Vocabulary Review-1\" width=\"328\" height=\"189\" \/><\/p>\n<p>Question 2.<br \/>\nWrite a subtraction equation.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-2087\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-1st-Grade-Answer-Key-Topic-1-Understand-Addition-and-Subtraction-86.1.png\" alt=\"Envision Math Common Core 1st Grade Answer Key Topic 1 Understand Addition and Subtraction 86.1\" width=\"249\" height=\"67\" \/><br \/>\nAnswer:<br \/>\nSubtraction equation:<br \/>\n8\u00a0 &#8211;\u00a0 3\u00a0 =\u00a0 5.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-8658\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-1st-Grade-Answers-Key-Topic-1-Understand-Addition-and-Subtraction-Lesson-1.9-Construct-Arguments-Fluency-Review-Activity-Vocabulary-Review-2-1.png\" alt=\"Envision-Math-Common-Core-1st-Grade-Answers-Key-Topic-1-Understand-Addition-and-Subtraction-Lesson 1.9 Construct Arguments-Fluency Review Activity-Vocabulary Review-2\" width=\"966\" height=\"675\" \/><\/p>\n<p>Explanation:<br \/>\nSubtraction equation:<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-7413\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-1st-Grade-Answers-Key-Topic-1-Understand-Addition-and-Subtraction-Lesson-1.9-Construct-Arguments-Fluency-Review-Activity-Vocabulary-Review-2.png\" alt=\"Envision-Math-Common-Core-1st-Grade-Answers-Key-Topic-1-Understand-Addition-and-Subtraction-Lesson 1.9 Construct Arguments-Fluency Review Activity-Vocabulary Review-2\" width=\"296\" height=\"181\" \/><\/p>\n<p>&nbsp;<\/p>\n<p>Question 3.<br \/>\nCircle the difference<br \/>\n8 &#8211; 2 = 6<br \/>\nAnswer:<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-7415\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-1st-Grade-Answers-Key-Topic-1-Understand-Addition-and-Subtraction-Lesson-1.9-Construct-Arguments-Fluency-Review-Activity-Vocabulary-Review-3.png\" alt=\"Envision-Math-Common-Core-1st-Grade-Answers-Key-Topic-1-Understand-Addition-and-Subtraction-Lesson 1.9 Construct Arguments-Fluency Review Activity-Vocabulary Review-3\" width=\"202\" height=\"105\" \/><\/p>\n<p>Explanation:<br \/>\nDifference:<br \/>\n8 &#8211; 2 = 6.<\/p>\n<p>&nbsp;<\/p>\n<p>&nbsp;<\/p>\n<p>Question 4.<br \/>\nCircle one part.<br \/>\n5 + 3 = 8<br \/>\nAnswer:<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-7416\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-1st-Grade-Answers-Key-Topic-1-Understand-Addition-and-Subtraction-Lesson-1.9-Construct-Arguments-Fluency-Review-Activity-Vocabulary-Review-4.png\" alt=\"Envision-Math-Common-Core-1st-Grade-Answers-Key-Topic-1-Understand-Addition-and-Subtraction-Lesson 1.9 Construct Arguments-Fluency Review Activity-Vocabulary Review-4\" width=\"205\" height=\"117\" \/><\/p>\n<p>Explanation:<br \/>\nAddition Equation:<br \/>\n5 + 3 = 8.<\/p>\n<p>&nbsp;<\/p>\n<p>&nbsp;<\/p>\n<p>Question 5.<br \/>\nCircle the plus sign.<br \/>\n3 + 4 = 7<br \/>\nAnswer:<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-7417\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-1st-Grade-Answers-Key-Topic-1-Understand-Addition-and-Subtraction-Lesson-1.9-Construct-Arguments-Fluency-Review-Activity-Vocabulary-Review-5.png\" alt=\"Envision-Math-Common-Core-1st-Grade-Answers-Key-Topic-1-Understand-Addition-and-Subtraction-Lesson 1.9 Construct Arguments-Fluency Review Activity-Vocabulary Review-5\" width=\"168\" height=\"120\" \/><\/p>\n<p>Explanation:<br \/>\nAddition Equation:<br \/>\n3 + 4 = 7.<\/p>\n<p>&nbsp;<\/p>\n<p><strong>Use Vocabulary in Writing<\/strong><\/p>\n<p>Question 6.<br \/>\nTell how to find 8-4. Use at least one word from the Word List.<br \/>\nAnswer:<br \/>\nEight &#8211; Four = Four.<\/p>\n<p>Explanation:<br \/>\nEight &#8211; Four = Four.<br \/>\n8- 4 = 4 or Four.<\/p>\n<p>&nbsp;<\/p>\n<p><strong>Set A<br \/>\n<\/strong>You can solve problems about adding to.<br \/>\n3 turtles<br \/>\n1 more joins.<br \/>\nHow many turtles now?<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-2088\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-1st-Grade-Answer-Key-Topic-1-Understand-Addition-and-Subtraction-86.2.png\" alt=\"Envision Math Common Core 1st Grade Answer Key Topic 1 Understand Addition and Subtraction 86.2\" width=\"364\" height=\"150\" \/><br \/>\nAnswer:<br \/>\nNumber of turtles now = 4 or Four.<\/p>\n<p>Explanation:<br \/>\nNumber of turtles = 3 or Three.<br \/>\nNumber of turtles more joined = 1 or One.<br \/>\nNumber of turtles now = Number of turtles + Number of turtles more joined<br \/>\n= 3 + 1<br \/>\n= 4 or Four.<br \/>\n<img src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-1st-Grade-Answer-Key-Topic-1-Understand-Addition-and-Subtraction-86.2.png\" alt=\"Envision Math Common Core 1st Grade Answer Key Topic 1 Understand Addition and Subtraction 86.2\" \/><\/p>\n<p>&nbsp;<\/p>\n<p><strong>Solve. Use cubes or draw a picture.<\/strong><\/p>\n<p>Question 1.<br \/>\n5 flowers<br \/>\n2 more flowers<br \/>\nHow many flowers now?<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-2089\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-1st-Grade-Answer-Key-Topic-1-Understand-Addition-and-Subtraction-86.3.png\" alt=\"Envision Math Common Core 1st Grade Answer Key Topic 1 Understand Addition and Subtraction 86.3\" width=\"438\" height=\"195\" \/><br \/>\nAnswer:<br \/>\nNumber of flowers now = 7 or Seven.<\/p>\n<p>Explanation:<br \/>\nNumber of flowers = 5 or Five.<br \/>\nNumber of more flowers = 2 or Two.<br \/>\nNumber of flowers now = Number of flowers + Number of more flowers<br \/>\n= 5 + 2<br \/>\n= 7 or Seven.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-7713\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-1st-Grade-Answers-Key-Topic-1-Understand-Addition-and-Subtraction-Lesson-1.9-Construct-Arguments-Solve.-Use-cubes-or-draw-a-picture-1.png\" alt=\"Envision-Math-Common-Core-1st-Grade-Answers-Key-Topic-1-Understand-Addition-and-Subtraction-Lesson 1.9 Construct Arguments-Solve. Use cubes or draw a picture-1\" width=\"488\" height=\"282\" \/><\/p>\n<p>&nbsp;<\/p>\n<p>&nbsp;<\/p>\n<p><strong>Set B<br \/>\n<\/strong>You can solve problems about putting together.<br \/>\n3 red markers and 2 blue markers How many markers in all?<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-2090\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-1st-Grade-Answer-Key-Topic-1-Understand-Addition-and-Subtraction-86.4.png\" alt=\"Envision Math Common Core 1st Grade Answer Key Topic 1 Understand Addition and Subtraction 86.4\" width=\"311\" height=\"179\" \/><br \/>\nAnswer:<br \/>\nNumber of markers in all = 5 or Five.<\/p>\n<p>Explanation:<br \/>\nNumber of red markers = 3 or Three.<br \/>\nNumber of blue markers = 2 or Two.<br \/>\nNumber of markers in all = Number of red markers + Number of blue markers<br \/>\n= 3 + 2<br \/>\n= 5 or Five.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-7789\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-1st-Grade-Answers-Key-Topic-1-Understand-Addition-and-Subtraction-Lesson-1.9-Construct-Arguments-Set-B.png\" alt=\"Envision-Math-Common-Core-1st-Grade-Answers-Key-Topic-1-Understand-Addition-and-Subtraction-Lesson 1.9 Construct Arguments-Set B\" width=\"480\" height=\"299\" \/><\/p>\n<p>Solve. Use cubes or draw a picture.<\/p>\n<p>Question 2.<br \/>\n4 red cars and 2 blue cars<br \/>\nHow many cars in all?<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-2091\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-1st-Grade-Answer-Key-Topic-1-Understand-Addition-and-Subtraction-86.5.png\" alt=\"Envision Math Common Core 1st Grade Answer Key Topic 1 Understand Addition and Subtraction 86.5\" width=\"467\" height=\"204\" \/><br \/>\nAnswer:<br \/>\nNumber of cars in all = 6 or Six.<\/p>\n<p>Explanation:<br \/>\nNumber of red cars = 4 or Four.<br \/>\nNumber of blue cars = 2 or Two.<br \/>\nNumber of cars in all = Number of red cars + Number of blue cars<br \/>\n= 4 + 2<br \/>\n= 6 or Six.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-7790\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-1st-Grade-Answers-Key-Topic-1-Understand-Addition-and-Subtraction-Lesson-1.9-Construct-Arguments-Set-B-2.png\" alt=\"Envision-Math-Common-Core-1st-Grade-Answers-Key-Topic-1-Understand-Addition-and-Subtraction-Lesson 1.9 Construct Arguments-Set B-2\" width=\"512\" height=\"248\" \/><\/p>\n<p>&nbsp;<\/p>\n<p>&nbsp;<\/p>\n<p><strong>Set C<br \/>\n<\/strong>You can solve problems with both addends unknown.<br \/>\n7 penguins in all . Some are inside a cave. Some are outside. Here is one way.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-2092\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-1st-Grade-Answer-Key-Topic-1-Understand-Addition-and-Subtraction-86.6.png\" alt=\"Envision Math Common Core 1st Grade Answer Key Topic 1 Understand Addition and Subtraction 86.6\" width=\"328\" height=\"208\" \/><\/p>\n<p>Use cubes or draw a picture. Write an equation to solve.<br \/>\nAnswer:<br \/>\nNumber of penguins in all = Number of penguins inside the cave + Number of penguins outside the cave<br \/>\n= 5 + 2<br \/>\n= 7 or Seven.<\/p>\n<p>Explanation:<br \/>\nNumber of penguins inside the cave = 2 or Two.<br \/>\nNumber of penguins outside the cave = 5 or Five.<br \/>\nNumber of penguins in all = Number of penguins inside the cave + Number of penguins outside the cave<br \/>\n= 2 + 5<br \/>\n= 7 or Seven.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-7792\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-1st-Grade-Answers-Key-Topic-1-Understand-Addition-and-Subtraction-Lesson-1.9-Construct-Arguments-Set-C.png\" alt=\"Envision-Math-Common-Core-1st-Grade-Answers-Key-Topic-1-Understand-Addition-and-Subtraction-Lesson 1.9 Construct Arguments-Set C\" width=\"313\" height=\"251\" \/><\/p>\n<p>Question 3.<br \/>\n6 penguins in all Some are inside. Some are outside. Show one way.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-2093\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-1st-Grade-Answer-Key-Topic-1-Understand-Addition-and-Subtraction-86.7.png\" alt=\"Envision Math Common Core 1st Grade Answer Key Topic 1 Understand Addition and Subtraction 86.7\" width=\"280\" height=\"151\" \/><br \/>\nAnswer:<br \/>\nNumber of penguins in all = Number of penguins inside the cave + Number of penguins outside the cave<br \/>\n= 2 + 4<br \/>\n= 6 or Six.<\/p>\n<p>Explanation:<br \/>\nNumber of penguins inside the cave = 2 or Two.<br \/>\nNumber of penguins outside the cave = 4 or Four.<br \/>\nNumber of penguins in all = Number of penguins inside the cave + Number of penguins outside the cave<br \/>\n= 2 + 4<br \/>\n= 6 or Six.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-7793\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-1st-Grade-Answers-Key-Topic-1-Understand-Addition-and-Subtraction-Lesson-1.9-Construct-Arguments-Set-C-3.png\" alt=\"Envision-Math-Common-Core-1st-Grade-Answers-Key-Topic-1-Understand-Addition-and-Subtraction-Lesson 1.9 Construct Arguments-Set C-3\" width=\"384\" height=\"215\" \/><\/p>\n<p>&nbsp;<\/p>\n<p>Question 4.<br \/>\n9 penguins in all Some are inside. Some are outside. Show one way.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-2094\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-1st-Grade-Answer-Key-Topic-1-Understand-Addition-and-Subtraction-86.8.png\" alt=\"Envision Math Common Core 1st Grade Answer Key Topic 1 Understand Addition and Subtraction 86.8\" width=\"254\" height=\"167\" \/><br \/>\nAnswer:<br \/>\nNumber of penguins in all = Number of penguins inside the cave + Number of penguins outside the cave<br \/>\n=&gt; 9 = 4 + 5<br \/>\nNumber of penguins inside the cave = 4 or Four.<br \/>\nNumber of penguins outside the cave = 5 or Five.<\/p>\n<p>Explanation:<br \/>\nNumber of penguins in all = 9 or Nine.<br \/>\nNumber of penguins inside the cave = 4 or Four.<br \/>\nNumber of penguins outside the cave = 5 or Five.<br \/>\nNumber of penguins in all = Number of penguins inside the cave + Number of penguins outside the cave<br \/>\n=&gt; 9 = 4 + 5<\/p>\n<p><img loading=\"lazy\" class=\"alignnone size-full wp-image-7794\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-1st-Grade-Answers-Key-Topic-1-Understand-Addition-and-Subtraction-Lesson-1.9-Construct-Arguments-Set-C-4.png\" alt=\"Envision-Math-Common-Core-1st-Grade-Answers-Key-Topic-1-Understand-Addition-and-Subtraction-Lesson 1.9 Construct Arguments-Set C-4\" width=\"359\" height=\"197\" \/><\/p>\n<p>&nbsp;<\/p>\n<p>Set D<\/p>\n<p>You can solve problems about taking from.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-2095\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-1st-Grade-Answer-Key-Topic-1-Understand-Addition-and-Subtraction-86.9.png\" alt=\"Envision Math Common Core 1st Grade Answer Key Topic 1 Understand Addition and Subtraction 86.9\" width=\"180\" height=\"132\" \/><br \/>\nThere are 6 pears. Mia takes 3 pears away. How many pears are left?<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-2096\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-1st-Grade-Answer-Key-Topic-1-Understand-Addition-and-Subtraction-86.10.png\" alt=\"Envision Math Common Core 1st Grade Answer Key Topic 1 Understand Addition and Subtraction 86.10\" width=\"285\" height=\"53\" \/><br \/>\nAnswer:<br \/>\nNumber of pears are left = 3 or Three.<\/p>\n<p>Explanation:<br \/>\nNumber of pears in all = 6 or Six.<br \/>\nNumber of pears Mia takes away = 3 or Three.<br \/>\nNumber of pears are left = Number of pears in all &#8211; Number of pears Mia takes away<br \/>\n= 6 &#8211; 3<br \/>\n= 3 or Three.<br \/>\n<img src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-1st-Grade-Answer-Key-Topic-1-Understand-Addition-and-Subtraction-86.10.png\" alt=\"Envision Math Common Core 1st Grade Answer Key Topic 1 Understand Addition and Subtraction 86.10\" \/><\/p>\n<p>&nbsp;<\/p>\n<p><strong>Use cubes or draw a picture. Write an equation and solve.<\/strong><\/p>\n<p>Question 5.<br \/>\nThere are 7 carrots.<br \/>\n3 carrots are picked.<br \/>\nHow many carrots are left?<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-2097\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-1st-Grade-Answer-Key-Topic-1-Understand-Addition-and-Subtraction-86.11.png\" alt=\"Envision Math Common Core 1st Grade Answer Key Topic 1 Understand Addition and Subtraction 86.11\" width=\"335\" height=\"51\" \/><br \/>\nAnswer:<br \/>\nNumber of carrots are left = 4 or Four.<\/p>\n<p>Explanation:<br \/>\nNumber of carrots in all = 7 or Seven.<br \/>\nNumber of carrots picked away = 3 or Three.<br \/>\nNumber of carrots are left = Number of carrots in all &#8211; Number of carrots picked away<br \/>\n= 7 &#8211; 3<br \/>\n= 4 or Four.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-7964\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-1st-Grade-Answers-Key-Topic-1-Understand-Addition-and-Subtraction-Lesson-1.9-Construct-Arguments-Use-cubes-or-draw-a-picture.-Write-an-equation-and-solve-5.png\" alt=\"Envision-Math-Common-Core-1st-Grade-Answers-Key-Topic-1-Understand-Addition-and-Subtraction-Lesson 1.9 Construct Arguments-Use cubes or draw a picture. Write an equation and solve-5\" width=\"381\" height=\"218\" \/><\/p>\n<p>&nbsp;<\/p>\n<p>&nbsp;<\/p>\n<p><strong>Set E<br \/>\n<\/strong>You can solve problems about comparing.<br \/>\n4 blue pens<br \/>\n3 yellow pens<br \/>\nHow many more blue pens than yellow pens are there?<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-2098\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-1st-Grade-Answer-Key-Topic-1-Understand-Addition-and-Subtraction-86.12.png\" alt=\"Envision Math Common Core 1st Grade Answer Key Topic 1 Understand Addition and Subtraction 86.12\" width=\"358\" height=\"84\" \/><\/p>\n<p>Answer:<br \/>\nThere are 1 more blue pens than yellow pens.<\/p>\n<p>Explanation:<br \/>\nNumber of yellow pens = 3 or Three.<br \/>\nNumber of blue pens = 4 or Four.<br \/>\nDifference = Number of blue pens &#8211; Number of yellow pens<br \/>\n= 4 &#8211; 3<br \/>\n= 1 or One.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-7965\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-1st-Grade-Answers-Key-Topic-1-Understand-Addition-and-Subtraction-Lesson-1.9-Construct-Arguments-Set-E.png\" alt=\"Envision-Math-Common-Core-1st-Grade-Answers-Key-Topic-1-Understand-Addition-and-Subtraction-Lesson 1.9 Construct Arguments-Set E\" width=\"292\" height=\"158\" \/><\/p>\n<p>Use cubes or draw a picture. Write an equation and solve.<\/p>\n<p>Question 6.<br \/>\n4 black pens and I red pen<br \/>\nHow many more black pens than red pens?<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-2099\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-1st-Grade-Answer-Key-Topic-1-Understand-Addition-and-Subtraction-86.13.png\" alt=\"Envision Math Common Core 1st Grade Answer Key Topic 1 Understand Addition and Subtraction 86.13\" width=\"432\" height=\"49\" \/><\/p>\n<p>Answer:<br \/>\nThere are 3 more black pens than red pens.<\/p>\n<p>Explanation:<br \/>\nNumber of black pens = 4 or Four.<br \/>\nNumber of red pens = 1 or One.<br \/>\nDifference = Number of black pens &#8211; Number of red pens<br \/>\n= 4 &#8211; 1<br \/>\n= 3 or Three.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-7966\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-1st-Grade-Answers-Key-Topic-1-Understand-Addition-and-Subtraction-Lesson-1.9-Construct-Arguments-Set-E-6.png\" alt=\"Envision-Math-Common-Core-1st-Grade-Answers-Key-Topic-1-Understand-Addition-and-Subtraction-Lesson 1.9 Construct Arguments-Set E-6\" width=\"470\" height=\"152\" \/><\/p>\n<p>&nbsp;<\/p>\n<p>&nbsp;<\/p>\n<p>Question 7.<br \/>\n3 baseballs and 7 soccer balls<br \/>\nHow many fewer baseballs than soccer balls?<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-2100\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-1st-Grade-Answer-Key-Topic-1-Understand-Addition-and-Subtraction-86.14.png\" alt=\"Envision Math Common Core 1st Grade Answer Key Topic 1 Understand Addition and Subtraction 86.14\" width=\"431\" height=\"43\" \/><br \/>\nAnswer:<br \/>\n4 fewer baseballs than soccer balls.<\/p>\n<p>Explanation:<br \/>\nNumber of baseballs = 3 or Three.<br \/>\nNumber of soccer balls = 7 or Seven.<br \/>\nDifference = Number of soccer balls &#8211; Number of baseballs<br \/>\n= 7 &#8211; 3<br \/>\n= 4 or Four.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-7967\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-1st-Grade-Answers-Key-Topic-1-Understand-Addition-and-Subtraction-Lesson-1.9-Construct-Arguments-Set-E-7.png\" alt=\"Envision-Math-Common-Core-1st-Grade-Answers-Key-Topic-1-Understand-Addition-and-Subtraction-Lesson 1.9 Construct Arguments-Set E-7\" width=\"491\" height=\"213\" \/><\/p>\n<p>&nbsp;<\/p>\n<p>&nbsp;<\/p>\n<p><strong>Set F<\/strong><\/p>\n<p>You can find a missing addend to solve problems.<\/p>\n<p>Ty has 4 grapes.<br \/>\nHe takes some more grapes.<br \/>\nNow he has 9 grapes<br \/>\nHow many grapes did Ty take?<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-2101\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-1st-Grade-Answer-Key-Topic-1-Understand-Addition-and-Subtraction-86.15.png\" alt=\"Envision Math Common Core 1st Grade Answer Key Topic 1 Understand Addition and Subtraction 86.15\" width=\"379\" height=\"155\" \/><\/p>\n<p>Use cubes or draw a picture. Write an equation and solve.<br \/>\nAnswer:<br \/>\nNumber of grapes ty takes more = 5 or Five.<\/p>\n<p>Explanation:<br \/>\nNumber of grapes ty has = 4 or Four.<br \/>\nTotal number of grapes ty has = 9 or Nine.<br \/>\nNumber of grapes ty takes more = Total number of grapes ty has &#8211; Number of grapes ty has<br \/>\n= 9 &#8211; 4<br \/>\n= 5 or Five.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-7990\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-1st-Grade-Answers-Key-Topic-1-Understand-Addition-and-Subtraction-Lesson-1.9-Construct-Arguments-Set-F.png\" alt=\"Envision-Math-Common-Core-1st-Grade-Answers-Key-Topic-1-Understand-Addition-and-Subtraction-Lesson 1.9 Construct Arguments-Set F\" width=\"340\" height=\"257\" \/><\/p>\n<p>&nbsp;<\/p>\n<p>Question 8.<br \/>\nIvy has 2 fish in a bowl. She adds some more fish. Now Ivy has 5 fish. How many fish did she add?<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-2102\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-1st-Grade-Answer-Key-Topic-1-Understand-Addition-and-Subtraction-86.16.png\" alt=\"Envision Math Common Core 1st Grade Answer Key Topic 1 Understand Addition and Subtraction 86.16\" width=\"411\" height=\"68\" \/><br \/>\nAnswer:<br \/>\nNumber of fishes Ivy has added = 3 or Three.<\/p>\n<p>Explanation:<br \/>\nNumber of fishes Ivy has in a bowl = 2 or Two.<br \/>\nTotal number of fishes Ivy has in a bowl = 5 or Five.<br \/>\nNumber of fishes Ivy has added = Total number of fishes Ivy has in a bowl &#8211; Number of fishes Ivy has in a bowl<br \/>\n= 5 &#8211; 2<br \/>\n= 3 or Three.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-7991\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-1st-Grade-Answers-Key-Topic-1-Understand-Addition-and-Subtraction-Lesson-1.9-Construct-Arguments-Set-F-9.png\" alt=\"Envision-Math-Common-Core-1st-Grade-Answers-Key-Topic-1-Understand-Addition-and-Subtraction-Lesson 1.9 Construct Arguments-Set F-9\" width=\"474\" height=\"224\" \/><\/p>\n<p>&nbsp;<\/p>\n<p><strong>Set G<br \/>\n<\/strong>You can add or subtract to find a missing part.<\/p>\n<p>Tom has 9 shirts.<br \/>\nHe has 4 red shirts.<br \/>\nThe rest are blue.<br \/>\nHow many blue shirts does Tom have?<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-2103\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-1st-Grade-Answer-Key-Topic-1-Understand-Addition-and-Subtraction-86.17.png\" alt=\"Envision Math Common Core 1st Grade Answer Key Topic 1 Understand Addition and Subtraction 86.17\" width=\"295\" height=\"126\" \/><\/p>\n<p>Use cubes or draw a picture. Write an equation and solve.<br \/>\nAnswer:<br \/>\nNumber of blue shirts Tom has = Total number of shirts Tom has -Number of red shirts Tom has<br \/>\n= 9 &#8211; 4<br \/>\n= 5 or Five.<\/p>\n<p>Explanation:<br \/>\nTotal number of shirts Tom has = 9 or Nine.<br \/>\nNumber of red shirts Tom has = 4 or Four.<br \/>\nNumber of blue shirts Tom has = Total number of shirts Tom has -Number of red shirts Tom has<br \/>\n= 9 &#8211; 4<br \/>\n= 5 or Five.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-7993\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-1st-Grade-Answers-Key-Topic-1-Understand-Addition-and-Subtraction-Lesson-1.9-Construct-Arguments-Set-G.png\" alt=\"Envision-Math-Common-Core-1st-Grade-Answers-Key-Topic-1-Understand-Addition-and-Subtraction-Lesson 1.9 Construct Arguments-Set G\" width=\"340\" height=\"247\" \/><\/p>\n<p>Question 9.<br \/>\nGigi has 8 pairs of shoes. 4 pairs are tennis shoes. The rest are sandals. How many pairs are sandals?<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-2104\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-1st-Grade-Answer-Key-Topic-1-Understand-Addition-and-Subtraction-86.18.png\" alt=\"Envision Math Common Core 1st Grade Answer Key Topic 1 Understand Addition and Subtraction 86.18\" width=\"266\" height=\"98\" \/><br \/>\nAnswer:<br \/>\nNumber of pair of sandals Gigi has = 4 or Four.<\/p>\n<p>Explanation:<br \/>\nTotal number of pairs of shoes Gigi has = 8 or Eight.<br \/>\nNumber of pairs of tennis shoes Gigi has = 4 or Four.<br \/>\nNumber of pair of sandals Gigi has = Total number of pairs of shoes Gigi has &#8211; Number of pairs of tennis shoes Gigi has<br \/>\n= 8 &#8211; 4<br \/>\n= 4 or Four.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-7994\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-1st-Grade-Answers-Key-Topic-1-Understand-Addition-and-Subtraction-Lesson-1.9-Construct-Arguments-Set-G-9.png\" alt=\"Envision-Math-Common-Core-1st-Grade-Answers-Key-Topic-1-Understand-Addition-and-Subtraction-Lesson 1.9 Construct Arguments-Set G-9\" width=\"340\" height=\"244\" \/><\/p>\n<p>&nbsp;<\/p>\n<p>&nbsp;<\/p>\n<p><strong>Set H<\/strong><\/p>\n<p><strong>Thinking Habits<\/strong><br \/>\nConstruct Arguments<br \/>\nHow can I use math to explain my work?<br \/>\nIs my explanation clear?<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-2105\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-1st-Grade-Answer-Key-Topic-1-Understand-Addition-and-Subtraction-86.19.png\" alt=\"Envision Math Common Core 1st Grade Answer Key Topic 1 Understand Addition and Subtraction 86.19\" width=\"122\" height=\"132\" \/><\/p>\n<p>Answer:<br \/>\nYou can use math in easy and simplify the calculations of the problem to explain your work.<br \/>\nYes, your explanation is clear and easy.<\/p>\n<p>Explanation:<br \/>\nUsing math helps in making easy calculations and understand to solve the problem in an easy way.<\/p>\n<p>&nbsp;<\/p>\n<p>&nbsp;<\/p>\n<p>Solve. Use pictures, numbers, or words to explain.<br \/>\nQuestion 10.<br \/>\nLuc has 8 fish.<br \/>\nHe gives away 4 fish.<br \/>\nHow many fish does Luc have left?<br \/>\nAnswer:<br \/>\nNumber of fishes Luc has left = 4 or Four.<\/p>\n<p>Explanation:<br \/>\nTotal number of fishes Luc has = 8 or Eight.<br \/>\nNumber of fishes Luc gives away = 4 or Four.<br \/>\nNumber of fishes Luc has left = Total number of fishes Luc has &#8211; Number of fishes Luc gives away<br \/>\n= 8 &#8211; 4<br \/>\n= 4 or Four.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-7995\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-1st-Grade-Answers-Key-Topic-1-Understand-Addition-and-Subtraction-Lesson-1.9-Construct-Arguments-Set-G-10.png\" alt=\"Envision-Math-Common-Core-1st-Grade-Answers-Key-Topic-1-Understand-Addition-and-Subtraction-Lesson 1.9 Construct Arguments-Set G-10\" width=\"327\" height=\"199\" \/><\/p>\n<p>&nbsp;<\/p>\n<p>&nbsp;<\/p>\n<h3>Topic 1 Assessment Practice<\/h3>\n<p>Question 1.<br \/>\nThere are 8 penguins.<br \/>\nSome go inside the cave.<br \/>\nSome stay outside.<br \/>\nMatch the number of penguins inside the cave with the number of penguins outside.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-2106\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-1st-Grade-Answer-Key-Topic-1-Understand-Addition-and-Subtraction-86.20.png\" alt=\"Envision Math Common Core 1st Grade Answer Key Topic 1 Understand Addition and Subtraction 86.20\" width=\"411\" height=\"200\" \/><br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-2107\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-1st-Grade-Answer-Key-Topic-1-Understand-Addition-and-Subtraction-86.21.png\" alt=\"Envision Math Common Core 1st Grade Answer Key Topic 1 Understand Addition and Subtraction 86.21\" width=\"713\" height=\"116\" \/><br \/>\nAnswer:<br \/>\nNumber of penguins inside the cave = 4 or Four.<br \/>\nNumber of penguins inside the cave = 5 or Five.<\/p>\n<p>Explanation:<br \/>\nTotal number of penguins\u00a0 = 8 or Eight.<br \/>\nTotal number of penguins\u00a0 =\u00a0 Number of penguins\u00a0 inside the cave + Number of penguins outside the cave<br \/>\n=&gt; 8 = ?? + ??<br \/>\n=&gt; 8 = 4 + 5<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-7996\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-1st-Grade-Answers-Key-Topic-1-Understand-Addition-and-Subtraction-Lesson-1.9-Construct-Arguments-Topic-1-Assessment-Practice-1.png\" alt=\"Envision-Math-Common-Core-1st-Grade-Answers-Key-Topic-1-Understand-Addition-and-Subtraction-Lesson 1.9 Construct Arguments-Topic 1 Assessment Practice-1\" width=\"768\" height=\"449\" \/><\/p>\n<p>&nbsp;<\/p>\n<p>Question 2.<br \/>\nSage had 10 peppers. She cooks 3 of them. How many peppers are left?<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-2108\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-1st-Grade-Answer-Key-Topic-1-Understand-Addition-and-Subtraction-86.23.png\" alt=\"Envision Math Common Core 1st Grade Answer Key Topic 1 Understand Addition and Subtraction 86.23\" width=\"170\" height=\"129\" \/><br \/>\nWrite a subtraction equation to solve.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-2109\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-1st-Grade-Answer-Key-Topic-1-Understand-Addition-and-Subtraction-86.24.png\" alt=\"Envision Math Common Core 1st Grade Answer Key Topic 1 Understand Addition and Subtraction 86.24\" width=\"348\" height=\"55\" \/><br \/>\nAnswer:<br \/>\nNumber of peppers left = 7 or Seven.<\/p>\n<p>Explanation:<br \/>\nNumber of peppers Sage had = 10 or Ten.<br \/>\nNumber of peppers Sage had cooked = 3 or Three.<br \/>\nNumber of peppers left = Number of peppers Sage had &#8211; Number of peppers Sage had cooked<br \/>\n= 10 &#8211; 3<br \/>\n= 7 or Seven.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-7997\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-1st-Grade-Answers-Key-Topic-1-Understand-Addition-and-Subtraction-Lesson-1.9-Construct-Arguments-Topic-1-Assessment-Practice-2.png\" alt=\"Envision-Math-Common-Core-1st-Grade-Answers-Key-Topic-1-Understand-Addition-and-Subtraction-Lesson 1.9 Construct Arguments-Topic 1 Assessment Practice-2\" width=\"419\" height=\"238\" \/><\/p>\n<p>&nbsp;<\/p>\n<p>&nbsp;<\/p>\n<p>Question 3.<br \/>\nSara has 5 green beads and 3 red beads. How many beads does she have in all?<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-2110\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-1st-Grade-Answer-Key-Topic-1-Understand-Addition-and-Subtraction-86.25.png\" alt=\"Envision Math Common Core 1st Grade Answer Key Topic 1 Understand Addition and Subtraction 86.25\" width=\"197\" height=\"143\" \/><br \/>\nWrite an addition equation to solve.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-2111\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-1st-Grade-Answer-Key-Topic-1-Understand-Addition-and-Subtraction-86.26.png\" alt=\"Envision Math Common Core 1st Grade Answer Key Topic 1 Understand Addition and Subtraction 86.26\" width=\"326\" height=\"52\" \/><br \/>\nAnswer:<br \/>\nTotal number of beads Sara has in all = 7 or Seven.<\/p>\n<p>Explanation:<br \/>\nNumber of beads Sara has = 10 or Ten.<br \/>\nNumber of beads Sara has = 3 or Three.<br \/>\nTotal number of beads Sara has in all\u00a0 = Number of beads Sara has &#8211; Number of beads Sara has<br \/>\n= 10 &#8211; 3<br \/>\n= 7 or Seven.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-7998\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-1st-Grade-Answers-Key-Topic-1-Understand-Addition-and-Subtraction-Lesson-1.9-Construct-Arguments-Topic-1-Assessment-Practice-3.png\" alt=\"Envision-Math-Common-Core-1st-Grade-Answers-Key-Topic-1-Understand-Addition-and-Subtraction-Lesson 1.9 Construct Arguments-Topic 1 Assessment Practice-3\" width=\"412\" height=\"203\" \/><\/p>\n<p>&nbsp;<\/p>\n<p>&nbsp;<\/p>\n<p>Question 4.<br \/>\nTrina has 8 markers. Then she gives 5 markers to David.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-2112\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-1st-Grade-Answer-Key-Topic-1-Understand-Addition-and-Subtraction-86.27.png\" alt=\"Envision Math Common Core 1st Grade Answer Key Topic 1 Understand Addition and Subtraction 86.27\" width=\"183\" height=\"114\" \/><br \/>\nWhich equation shows how many markers Trina has left?<br \/>\nA. 7 &#8211; 2 = 5<br \/>\nB. 7 &#8211; 3 = 4<br \/>\nC. 8 &#8211; 5 = 3<br \/>\nD. 9 &#8211; 3 = 6<br \/>\nAnswer:<br \/>\nNumber of markers Trina has left = 3 or Three.<br \/>\nC. 8 &#8211; 5 = 3<\/p>\n<p>Explanation:<br \/>\nTotal number of markers Trina has = 8 or Eight.<br \/>\nNumber of markers given to David = 5 or Five.<br \/>\nNumber of markers Trina has left =Total number of markers Trina has &#8211; Number of markers given to David<br \/>\n= 8 &#8211; 5<br \/>\n= 3 or Three.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-8280\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-1st-Grade-Answers-Key-Topic-1-Understand-Addition-and-Subtraction-Lesson-1.9-Construct-Arguments-Topic-1-Assessment-Practice-4.png\" alt=\"Envision-Math-Common-Core-1st-Grade-Answers-Key-Topic-1-Understand-Addition-and-Subtraction-Lesson 1.9 Construct Arguments-Topic 1 Assessment Practice-4\" width=\"376\" height=\"206\" \/><\/p>\n<p>&nbsp;<\/p>\n<p>&nbsp;<\/p>\n<p>Question 5.<br \/>\nGeorge had 7 postcards. Then he gets some more. Now he has 9 postcards.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-2113\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-1st-Grade-Answer-Key-Topic-1-Understand-Addition-and-Subtraction-86.28.png\" alt=\"Envision Math Common Core 1st Grade Answer Key Topic 1 Understand Addition and Subtraction 86.28\" width=\"399\" height=\"115\" \/><br \/>\nWhich equation does NOT describe the story?<br \/>\nA. 7 + 2 = 9<br \/>\nB. 6 + 3 = 9<br \/>\nC. 9 &#8211; 7 = 2<br \/>\nD. 9 &#8211; 2 = 7<br \/>\nAnswer:<br \/>\nB. 6 + 3 = 9 does NOT describe the story.<\/p>\n<p>Explanation:<br \/>\nNumber of postcards George had = 7 or Seven.<br \/>\nTotal number of postcards now he has = 9 or Nine.<br \/>\nEquation: A:<br \/>\nNumber of postcards George had + Number of postcards George gets more\u00a0 = Total number of postcards now he has<br \/>\n=&gt; 7 + 2<br \/>\n= 9 or Nine.<\/p>\n<p>Equation: C:<br \/>\nNumber of postcards George gets more = Total number of postcards now he has &#8211; Number of postcards George had<br \/>\n= 9 &#8211; 7<br \/>\n= 2 or Two.<\/p>\n<p>Equation: D:<br \/>\nTotal number of postcards now he has &#8211; Number of postcards George gets more = Number of postcards George had<br \/>\n= 9 &#8211; 2<br \/>\n= 7 or Seven.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-8284\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-1st-Grade-Answers-Key-Topic-1-Understand-Addition-and-Subtraction-Lesson-1.9-Construct-Arguments-Topic-1-Assessment-Practice-5.png\" alt=\"Envision-Math-Common-Core-1st-Grade-Answers-Key-Topic-1-Understand-Addition-and-Subtraction-Lesson 1.9 Construct Arguments-Topic 1 Assessment Practice-5\" width=\"602\" height=\"447\" \/><\/p>\n<p>&nbsp;<\/p>\n<p>&nbsp;<\/p>\n<p>Question 6.<br \/>\nDante has 5 books. He wants to have 7 books. How many more books does Dante need to have 7 in all?<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-2114\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-1st-Grade-Answer-Key-Topic-1-Understand-Addition-and-Subtraction-86.29.png\" alt=\"Envision Math Common Core 1st Grade Answer Key Topic 1 Understand Addition and Subtraction 86.29\" width=\"535\" height=\"82\" \/><\/p>\n<p>Answer:<br \/>\nNumber of books he needs more to have 7 in all = 2 or Two.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-8282\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-1st-Grade-Answers-Key-Topic-1-Understand-Addition-and-Subtraction-Lesson-1.9-Construct-Arguments-Topic-1-Assessment-Practice-6...png\" alt=\"Envision-Math-Common-Core-1st-Grade-Answers-Key-Topic-1-Understand-Addition-and-Subtraction-Lesson 1.9 Construct Arguments-Topic 1 Assessment Practice-6..\" width=\"617\" height=\"133\" \/><\/p>\n<p>Explanation:<br \/>\nNumber of books Dante has = 5 or Five.<br \/>\nNumber of books he want to have = 7 or Seven.<br \/>\nNumber of books he needs more to have 7 in all = Number of books he want to have &#8211; Number of books Dante has<br \/>\n= 7 &#8211; 5<br \/>\n= 2 or Two.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-8281\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-1st-Grade-Answers-Key-Topic-1-Understand-Addition-and-Subtraction-Lesson-1.9-Construct-Arguments-Topic-1-Assessment-Practice-6.png\" alt=\"Envision-Math-Common-Core-1st-Grade-Answers-Key-Topic-1-Understand-Addition-and-Subtraction-Lesson 1.9 Construct Arguments-Topic 1 Assessment Practice-6\" width=\"366\" height=\"223\" \/><\/p>\n<p>&nbsp;<\/p>\n<p>&nbsp;<\/p>\n<p>Question 7.<br \/>\nLucy and Ellie have 6 cubes in all.<br \/>\nEllie has 5 cubes.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-2115\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-1st-Grade-Answer-Key-Topic-1-Understand-Addition-and-Subtraction-86.30.png\" alt=\"Envision Math Common Core 1st Grade Answer Key Topic 1 Understand Addition and Subtraction 86.30\" width=\"221\" height=\"121\" \/><br \/>\nHow many cubes does Lucy have?<br \/>\nChoose three equations that show the story.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-2116\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-1st-Grade-Answer-Key-Topic-1-Understand-Addition-and-Subtraction-86.31.png\" alt=\"Envision Math Common Core 1st Grade Answer Key Topic 1 Understand Addition and Subtraction 86.31\" width=\"830\" height=\"88\" \/><br \/>\nAnswer:<br \/>\nNumber of cubes Lucy has =\u00a01 or one.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-8703\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-1st-Grade-Answers-Key-Topic-1-Understand-Addition-and-Subtraction-Lesson-1.9-Construct-Arguments-Topic-1-Assessment-Practice-7-1.png\" alt=\"Envision-Math-Common-Core-1st-Grade-Answers-Key-Topic-1-Understand-Addition-and-Subtraction-Lesson 1.9 Construct Arguments-Topic 1 Assessment Practice-7\" width=\"908\" height=\"180\" \/><\/p>\n<p>Explanation:<br \/>\nEquation:1:<br \/>\nNumber of cubes Lucy and Ellie have in all = 6 or Six.<br \/>\nNumber of cubes Ellie has = 5 or Five.<br \/>\nNumber of cubes Lucy has = Number of cubes Lucy and Ellie have in all &#8211; Number of cubes Ellie has<br \/>\n= 6 &#8211; 5<br \/>\n= 1 or one.<br \/>\nEquation:2:<br \/>\nNumber of cubes Lucy and Ellie have in all + Number of cubes Lucy has = Number of cubes Lucy and Ellie have in all<br \/>\n= 5 + 1<br \/>\n= 6 or Six.<br \/>\nEquation:3:<br \/>\nNumber of cubes Lucy and Ellie have in all &#8211; Number of cubes Ellie has = Number of cubes Lucy has<br \/>\n= 6-1<br \/>\n= 5 or Five.<\/p>\n<p><img loading=\"lazy\" class=\"alignnone size-full wp-image-8286\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-1st-Grade-Answers-Key-Topic-1-Understand-Addition-and-Subtraction-Lesson-1.9-Construct-Arguments-Topic-1-Assessment-Practice-7.png\" alt=\"Envision-Math-Common-Core-1st-Grade-Answers-Key-Topic-1-Understand-Addition-and-Subtraction-Lesson 1.9 Construct Arguments-Topic 1 Assessment Practice-7\" width=\"333\" height=\"219\" \/><\/p>\n<p>&nbsp;<\/p>\n<p>Question 8.<br \/>\nTrina has 6 ribbons. Julie has 2 ribbons. What could happen for them to have the same number of ribbons?<br \/>\nA. Julie gives I of her ribbons to Trina.<br \/>\nB. Trina gives I of her ribbons to Julie.<br \/>\nC. Trina gives 2 of her ribbons to Julie.<br \/>\nD. Trina gives 4 of her ribbons to Julie.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-2117\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-1st-Grade-Answer-Key-Topic-1-Understand-Addition-and-Subtraction-86.32.png\" alt=\"Envision Math Common Core 1st Grade Answer Key Topic 1 Understand Addition and Subtraction 86.32\" width=\"361\" height=\"179\" \/><br \/>\nAnswer:<br \/>\nNumber of ribbons them to have the same number = 4 or Four.<br \/>\nD. Trina gives 4 of her ribbons to Julie.<\/p>\n<p>Explanation:<br \/>\nNumber of ribbons Trina has = 6 or Six.<br \/>\nNumber of ribbons Julie has = 2 or Two.<br \/>\nNumber of ribbons them to have the same number = Number of ribbons Trina has &#8211; Number of ribbons Julie has<br \/>\n= 6 &#8211; 2<br \/>\n= 4 or Four.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-8629\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-1st-Grade-Answers-Key-Topic-1-Understand-Addition-and-Subtraction-Lesson-1.9-Construct-Arguments-Topic-1-Assessment-Practice-8.png\" alt=\"Envision-Math-Common-Core-1st-Grade-Answers-Key-Topic-1-Understand-Addition-and-Subtraction-Lesson 1.9 Construct Arguments-Topic 1 Assessment Practice-8\" width=\"328\" height=\"194\" \/><\/p>\n<p>Question 9.<br \/>\nDraw the missing cubes on the mat.<br \/>\nThen write a subtraction equation that shows the story.<br \/>\nOwen has 5 blocks. He gives I to Jordan.<br \/>\nHow many blocks does Owen have left?<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-2118\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-1st-Grade-Answer-Key-Topic-1-Understand-Addition-and-Subtraction-86.33.png\" alt=\"Envision Math Common Core 1st Grade Answer Key Topic 1 Understand Addition and Subtraction 86.33\" width=\"204\" height=\"191\" \/><br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-2119\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-1st-Grade-Answer-Key-Topic-1-Understand-Addition-and-Subtraction-86.34.png\" alt=\"Envision Math Common Core 1st Grade Answer Key Topic 1 Understand Addition and Subtraction 86.34\" width=\"332\" height=\"48\" \/><\/p>\n<p>Answer:<br \/>\nNumber of blocks Owen have left = 4 or Four.<\/p>\n<p>Explanation:<br \/>\nNumber of blocks Owen has = 5 or Five.<br \/>\nNumber of blocks Own gives to Jordan = 1 or One.<br \/>\nNumber of blocks Owen have left = Number of blocks Owen has &#8211; Number of blocks Own gives to Jordan<br \/>\n= 5 &#8211; 1<br \/>\n= 4 or Four.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-8633\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-1st-Grade-Answers-Key-Topic-1-Understand-Addition-and-Subtraction-Lesson-1.9-Construct-Arguments-Topic-1-Assessment-Practice-9.png\" alt=\"Envision-Math-Common-Core-1st-Grade-Answers-Key-Topic-1-Understand-Addition-and-Subtraction-Lesson 1.9 Construct Arguments-Topic 1 Assessment Practice-9\" width=\"360\" height=\"198\" \/><\/p>\n<p>&nbsp;<\/p>\n<p>Question 10.<br \/>\nHannah has 9 flowers. Carrie has 6 flowers. Which equation shows how many fewer flowers Carrie has than Hannah?<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-2120\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-1st-Grade-Answer-Key-Topic-1-Understand-Addition-and-Subtraction-86.35.png\" alt=\"Envision Math Common Core 1st Grade Answer Key Topic 1 Understand Addition and Subtraction 86.35\" width=\"468\" height=\"157\" \/><br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-2125\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-1st-Grade-Answer-Key-Topic-1-Understand-Addition-and-Subtraction-86.40.png\" alt=\"Envision Math Common Core 1st Grade Answer Key Topic 1 Understand Addition and Subtraction 86.40\" width=\"658\" height=\"71\" \/><br \/>\nAnswer:<br \/>\nNumber of fewer flowers Carrie has than Hannah = 3 or Three.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-8637\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-1st-Grade-Answers-Key-Topic-1-Understand-Addition-and-Subtraction-Lesson-1.9-Construct-Arguments-Topic-1-Assessment-Practice-10...png\" alt=\"Envision-Math-Common-Core-1st-Grade-Answers-Key-Topic-1-Understand-Addition-and-Subtraction-Lesson 1.9 Construct Arguments-Topic 1 Assessment Practice-10..\" width=\"873\" height=\"137\" \/><\/p>\n<p>Explanation:<br \/>\nNumber of flowers Hannah has = 9 or Nine.<br \/>\nNumber of flowers Carrie has = 6 or Six.<br \/>\nNumber of fewer flowers Carrie has than Hannah = Number of flowers Hannah has &#8211; Number of flowers Carrie has<br \/>\n= 9 &#8211; 6<br \/>\n= 3 or Three.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-8636\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-1st-Grade-Answers-Key-Topic-1-Understand-Addition-and-Subtraction-Lesson-1.9-Construct-Arguments-Topic-1-Assessment-Practice-10.png\" alt=\"Envision-Math-Common-Core-1st-Grade-Answers-Key-Topic-1-Understand-Addition-and-Subtraction-Lesson 1.9 Construct Arguments-Topic 1 Assessment Practice-10\" width=\"346\" height=\"217\" \/><\/p>\n<p>Question 11.<br \/>\nLaura has 7 pears.<br \/>\nShe wants to keep 2 pears for herself and give one to each of 6 friends.<br \/>\nWill Laura have enough pears?<br \/>\nUse pictures and words to explain.<br \/>\nAnswer:<br \/>\nLaura is not having enough pears to give to her friends.<br \/>\nNumber of pears left with her are five, which are less to give to her 6 friends each.<\/p>\n<p>Explanation:<br \/>\nTotal number of pears Laura has = 7 or Seven.<br \/>\nNumber of pears She wants to keep for herself = 2 or Two.<br \/>\nNumber of pears left =\u00a0 Total number of pears Laura has &#8211; Number of pears She wants to keep for herself<br \/>\n= 7 or 2<br \/>\n= 5 or Five.<br \/>\nNumber of pears She give one to each of 6 friends.<br \/>\n=&gt; Number of pears required to be with her to give to her friends = 1 \u00d7 6<br \/>\n=&gt; 6 or Six.<br \/>\nNumber of pears left with her are 5, which are less to give to her friends.<br \/>\nTherefore, Laura does not have enough pears to give to her friends.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-8641\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-1st-Grade-Answers-Key-Topic-1-Understand-Addition-and-Subtraction-Lesson-1.9-Construct-Arguments-Topic-1-Assessment-Practice-11.png\" alt=\"Envision-Math-Common-Core-1st-Grade-Answers-Key-Topic-1-Understand-Addition-and-Subtraction-Lesson 1.9 Construct Arguments-Topic 1 Assessment Practice-11\" width=\"274\" height=\"288\" \/><\/p>\n<p>&nbsp;<\/p>\n<p>Question 12.<br \/>\nNikki has 8 tennis balls. Thomas has 6 tennis balls. Which equation shows how many more tennis Nikki has than Thomas?<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-2121\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-1st-Grade-Answer-Key-Topic-1-Understand-Addition-and-Subtraction-86.36.png\" alt=\"Envision Math Common Core 1st Grade Answer Key Topic 1 Understand Addition and Subtraction 86.36\" width=\"300\" height=\"91\" \/><br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-2122\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-1st-Grade-Answer-Key-Topic-1-Understand-Addition-and-Subtraction-86.37.png\" alt=\"Envision Math Common Core 1st Grade Answer Key Topic 1 Understand Addition and Subtraction 86.37\" width=\"656\" height=\"79\" \/><br \/>\nAnswer:<br \/>\nNumber of more tennis balls Nikki has than Thomas = 2 or Two.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-8642\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-1st-Grade-Answers-Key-Topic-1-Understand-Addition-and-Subtraction-Lesson-1.9-Construct-Arguments-Topic-1-Assessment-Practice-12...png\" alt=\"Envision-Math-Common-Core-1st-Grade-Answers-Key-Topic-1-Understand-Addition-and-Subtraction-Lesson 1.9 Construct Arguments-Topic 1 Assessment Practice-12..\" width=\"729\" height=\"148\" \/><\/p>\n<p>Explanation:<br \/>\nNumber of tennis balls Nikki has = 8 or Eight<br \/>\nNumber of tennis balls Thomas has = 6 or Six.<br \/>\nNumber of more tennis balls Nikki has than Thomas = Number of tennis balls Nikki has &#8211; Number of tennis balls Thomas has<br \/>\n= 8 &#8211; 6<br \/>\n= 2 or Two.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-8643\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-1st-Grade-Answers-Key-Topic-1-Understand-Addition-and-Subtraction-Lesson-1.9-Construct-Arguments-Topic-1-Assessment-Practice-12.png\" alt=\"Envision-Math-Common-Core-1st-Grade-Answers-Key-Topic-1-Understand-Addition-and-Subtraction-Lesson 1.9 Construct Arguments-Topic 1 Assessment Practice-12\" width=\"295\" height=\"196\" \/><\/p>\n<h3><\/h3>\n<h3>Topic 1 Assessment Practice<\/h3>\n<p><strong>Skating Ribbons<\/strong><br \/>\nMarta is an ice skater.<br \/>\nShe wins ribbons for her skating.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-2123\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-1st-Grade-Answer-Key-Topic-1-Understand-Addition-and-Subtraction-86.38.png\" alt=\"Envision Math Common Core 1st Grade Answer Key Topic 1 Understand Addition and Subtraction 86.38\" width=\"193\" height=\"483\" \/><\/p>\n<p>Question 1.<br \/>\nMarta wins 2 blue ribbons. She wins 4 red ribbons.<br \/>\nHow many ribbons does she win in all?<br \/>\n____ ribbons<br \/>\nAnswer:<br \/>\nNumber of ribbons Marta wins in all = 6 or Six.<br \/>\n_6__ ribbons.<\/p>\n<p>Explanation:<br \/>\nNumber of blue ribbons Marta wins = 2 or Two.<br \/>\nNumber of red ribbons Marta wins = 4 or Four.<br \/>\nNumber of ribbons Marta wins in all = Number of blue ribbons Marta wins + Number of red ribbons Marta wins<br \/>\n= 2 + 4<br \/>\n= 6 or Six.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-7011\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-1st-Grade-Answers-Key-Topic-1-Understand-Addition-and-Subtraction-Topic-1-Assessment-Practice-Skating-Ribbons-1.png\" alt=\"Envision-Math-Common-Core-1st-Grade-Answers-Key-Topic-1-Understand-Addition-and-Subtraction-Topic 1 Assessment Practice-Skating Ribbons-1\" width=\"332\" height=\"201\" \/><\/p>\n<p>&nbsp;<\/p>\n<p>Question 2.<br \/>\nMarta has 4 red ribbons.<br \/>\nShe wins some more red ribbons.<br \/>\nNow she has 7 red ribbons.<br \/>\nHow many more red ribbons did Marta win? ___ more red ribbons<br \/>\nWrite an equation to show why your answer is correct.<br \/>\nAnswer:<br \/>\n3 more red ribbons Marta wins.<br \/>\n_3__ more red ribbons.<\/p>\n<p>Explanation:<br \/>\nNumber of red ribbons Marta has = 4 or Four.<br \/>\nTotal number of red ribbons Marta has now = 7 or Seven.<br \/>\nNumber of red ribbons Marta wins more = Total number of red ribbons Marta has now &#8211; Number of red ribbons Marta has<br \/>\n= 7 &#8211; 4<br \/>\n= 3 or Three.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-7010\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-1st-Grade-Answers-Key-Topic-1-Understand-Addition-and-Subtraction-Topic-1-Assessment-Practice-Skating-Ribbons-2.png\" alt=\"Envision-Math-Common-Core-1st-Grade-Answers-Key-Topic-1-Understand-Addition-and-Subtraction-Topic 1 Assessment Practice-Skating Ribbons-2\" width=\"378\" height=\"207\" \/><\/p>\n<p>&nbsp;<\/p>\n<p>&nbsp;<\/p>\n<p>Question 3.<br \/>\nMarta has 8 yellow ribbons. She put some on her door. She puts the rest on her wall.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-2124\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-1st-Grade-Answer-Key-Topic-1-Understand-Addition-and-Subtraction-86.39.png\" alt=\"Envision Math Common Core 1st Grade Answer Key Topic 1 Understand Addition and Subtraction 86.39\" width=\"279\" height=\"236\" \/><br \/>\nWrite two different addition equations to show two ways she can put the ribbons on her door or on her wall.<br \/>\nAnswer:<br \/>\nEquation:1:<br \/>\nNumber of yellow ribbons She puts on her door = 4 or Four.<br \/>\nNumber of yellow ribbons She puts on her wall = 4 or Four.<\/p>\n<p>Equation:2:<br \/>\nNumber of yellow ribbons She puts on her door = 5 or Five.<br \/>\nNumber of yellow ribbons She puts on her wall = 3 or Three.<\/p>\n<p>Explanation:<br \/>\nEquation:1:<br \/>\nNumber of yellow ribbons Marta has = 8 or Eight.<br \/>\nNumber of yellow ribbons Marta has = Number of yellow ribbons She puts on her door + Number of yellow ribbons She puts on her wall<br \/>\n= 4+ 4<br \/>\n= 8 or Eight.<\/p>\n<p>Equation:2:<br \/>\nNumber of yellow ribbons Marta has = 8 or Eight.<br \/>\nNumber of yellow ribbons Marta has = Number of yellow ribbons She puts on her door + Number of yellow ribbons She puts on her wall<br \/>\n= 5 + 3<br \/>\n= 8 or Eight.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-8645\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-1st-Grade-Answers-Key-Topic-1-Understand-Addition-and-Subtraction-Topic-1-Assessment-Practice-Skating-Ribbons-3.png\" alt=\"Envision-Math-Common-Core-1st-Grade-Answers-Key-Topic-1-Understand-Addition-and-Subtraction-Topic 1 Assessment Practice-Skating Ribbons-3\" width=\"302\" height=\"341\" \/><\/p>\n<p>&nbsp;<\/p>\n<p>Question 4.<br \/>\nMarta has 8 yellow ribbons.<br \/>\nShe has 2 blue ribbons.<br \/>\nHow many more yellow ribbons than blue ribbons does Marta have?<br \/>\n___ more yellow ribbons<br \/>\nAnswer:<br \/>\n6 more yellow ribbons than blue ribbons Marta has.<br \/>\n_6__ more yellow ribbons.<\/p>\n<p>Explanation:<br \/>\nNumber of yellow ribbons Marta has = 8 or Eight.<br \/>\nNumber of blue ribbons Marta has = 2 or Two.<br \/>\nDifference = Number of yellow ribbons Marta has &#8211; Number of blue ribbons Marta has<br \/>\n= 8 &#8211; 2<br \/>\n= 6 or Six.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-7009\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-1st-Grade-Answers-Key-Topic-1-Understand-Addition-and-Subtraction-Topic-1-Assessment-Practice-Skating-Ribbons-4.png\" alt=\"Envision-Math-Common-Core-1st-Grade-Answers-Key-Topic-1-Understand-Addition-and-Subtraction-Topic 1 Assessment Practice-Skating Ribbons-4\" width=\"310\" height=\"219\" \/><\/p>\n<p>&nbsp;<\/p>\n<p>Question 5.<br \/>\nExplain why your answer to item 4 is correct. Use numbers, pictures, or words.<br \/>\nAnswer:<br \/>\nMy answer is correct to item 4 because:<br \/>\nDifference of more yellow ribbons than blue ribbons Marta has + Number of blue ribbons Marta has<br \/>\n=&gt; 6 + 2<br \/>\n=&gt; 8 = Number of yellow ribbons Marta has.<\/p>\n<p>Explanation:<br \/>\nMy answer is correct to item 4 because:<br \/>\nDifference of more yellow ribbons than blue ribbons Marta has + Number of blue ribbons Marta has<br \/>\n=&gt; 6 + 2<br \/>\n=&gt; 8 = Number of yellow ribbons Marta has.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-8651\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-1st-Grade-Answers-Key-Topic-1-Understand-Addition-and-Subtraction-Topic-1-Assessment-Practice-Skating-Ribbons-5.png\" alt=\"Envision-Math-Common-Core-1st-Grade-Answers-Key-Topic-1-Understand-Addition-and-Subtraction-Topic 1 Assessment Practice-Skating Ribbons-5\" width=\"291\" height=\"165\" \/><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Practice with the help of enVision Math Common Core Grade 1 Answer Key Topic 1 Understand Addition and Subtraction regularly and improve your accuracy in solving questions. enVision Math Common Core 1st Grade Answers Key Topic 1 Understand Addition and Subtraction Essential Question: What are ways to think about addition and subtraction? Look at the &#8230; <a title=\"enVision Math Common Core Grade 1 Answer Key Topic 1 Understand Addition and Subtraction\" class=\"read-more\" href=\"https:\/\/bigideasmathanswers.com\/envision-math-common-core-grade-1-answer-key-topic-1\/\" aria-label=\"More on enVision Math Common Core Grade 1 Answer Key Topic 1 Understand Addition and Subtraction\">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\/89970"}],"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=89970"}],"version-history":[{"count":1,"href":"https:\/\/bigideasmathanswers.com\/wp-json\/wp\/v2\/posts\/89970\/revisions"}],"predecessor-version":[{"id":89973,"href":"https:\/\/bigideasmathanswers.com\/wp-json\/wp\/v2\/posts\/89970\/revisions\/89973"}],"wp:attachment":[{"href":"https:\/\/bigideasmathanswers.com\/wp-json\/wp\/v2\/media?parent=89970"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/bigideasmathanswers.com\/wp-json\/wp\/v2\/categories?post=89970"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/bigideasmathanswers.com\/wp-json\/wp\/v2\/tags?post=89970"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}