{"id":89991,"date":"2022-03-29T17:22:01","date_gmt":"2022-03-29T11:52:01","guid":{"rendered":"https:\/\/bigideasmathanswers.com\/?p=89991"},"modified":"2022-04-07T14:44:09","modified_gmt":"2022-04-07T09:14:09","slug":"envision-math-common-core-grade-1-answer-key-topic-10","status":"publish","type":"post","link":"https:\/\/bigideasmathanswers.com\/envision-math-common-core-grade-1-answer-key-topic-10\/","title":{"rendered":"enVision Math Common Core Grade 1 Answer Key Topic 10 Use Models and Strategies to Add Tens and Ones"},"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 10 Use Models and Strategies to Add Tens and Ones<\/strong> regularly and improve your accuracy in solving questions.<\/p>\n<h2>enVision Math Common Core 1st Grade Answers Key Topic 10 Use Models and Strategies to Add Tens and Ones<\/h2>\n<p><img loading=\"lazy\" class=\"alignnone size-full wp-image-3758\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-Grade-1-Answer-Key-Topic-10-Use-Models-and-Strategies-to-Add-Tens-and-Ones-1.png\" alt=\"Envision Math Common Core Grade 1 Answer Key Topic 10 Use Models and Strategies to Add Tens and Ones 1\" width=\"710\" height=\"309\" \/><\/p>\n<p><strong>enVision STEM Project: Watch the Stars<\/strong><\/p>\n<p><strong>Find Out<\/strong> Talk to friends and relatives about stars. Discuss why the stars you see in the sky change from night tonight.<br \/>\n<strong>Journal: Make a Book<\/strong> Show what you found out. In your book, also:<\/p>\n<ul>\n<li>Draw the stars you can see from where you live.<\/li>\n<li>Make up and solve addition problems about the stars.<\/li>\n<\/ul>\n<p><strong>Review What You Know<\/strong><\/p>\n<p><strong>Vocabulary<\/strong><\/p>\n<p>Question 1.<br \/>\nCircle the digit that shows how many ones.<br \/>\n91<\/p>\n<p>Answer:<br \/>\nThe digit that shows many ones is 1.<\/p>\n<p>Explanation:<br \/>\nIn the above-given question,<br \/>\ngiven that,<br \/>\nthe number is 91.<br \/>\n9 is in the tens place.<br \/>\n1 is in one place.<br \/>\nso we have to circle for one.<\/p>\n<p>Question 2.<br \/>\nCircle the digit that shows how many tens.<br \/>\n13<\/p>\n<p>Answer:<br \/>\nThe digit that shows many tens is 1.<\/p>\n<p>Explanation:<br \/>\nIn the above-given question,<br \/>\ngiven that,<br \/>\nthe number is 13.<br \/>\n1 is in the tens place.<br \/>\n3 is in one place.<br \/>\nso we have to circle for one.<\/p>\n<p>Question 3.<br \/>\nCircle the symbol that tells you add.<br \/>\n+ &#8211; =<\/p>\n<p>Answer:<br \/>\nThe symbol is +.<\/p>\n<p>Explanation:<br \/>\nIn the above-given question,<br \/>\ngiven that,<br \/>\nfor example:<br \/>\n3 + 2.<br \/>\n5.<br \/>\nhere we did the addition operation.<\/p>\n<p><strong>Understanding Addition<\/strong><\/p>\n<p>Question 4.<br \/>\nWrite an addition equation to match the picture.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-3757\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-Grade-1-Answer-Key-Topic-10-Use-Models-and-Strategies-to-Add-Tens-and-Ones-1.1.png\" alt=\"Envision Math Common Core Grade 1 Answer Key Topic 10 Use Models and Strategies to Add Tens and Ones 1.1\" width=\"235\" height=\"121\" \/><\/p>\n<p>Answer:<br \/>\nThe equation is 9 + 5 = 14.<\/p>\n<p>Explanation:<br \/>\nIn the above-given question,<br \/>\ngiven that,<br \/>\nthere are 9 blue flowers.<br \/>\nthere are 5 red flowers.<br \/>\n9 + 5 = 14.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-25726\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/07\/Envision-Math-Common-Core-1st-Grade-Answers-Key-Topic-10-Use-Models-and-Strategies-to-Add-Tens-and-Ones-1.png\" alt=\"Envision-Math-Common-Core-1st-Grade-Answers-Key-Topic-10-Use Models and Strategies to Add Tens and Ones -1\" width=\"219\" height=\"132\" \/><\/p>\n<p>Question 5.<br \/>\nNoah mows 7 lawns. Mari mows 13 lawns. How many lawns did the two friends mow in all? Write an addition equation to solve.<br \/>\n__ + __ = ____<\/p>\n<p>Answer:<br \/>\nThe addition equation is 7 + 13 = 20.<\/p>\n<p>Explanation:<br \/>\nIn the above-given question,<br \/>\ngiven that,<br \/>\nNoah mows 7 lawns.<br \/>\nMari mows 13 lawns.<br \/>\n7 + 13 = 20.<\/p>\n<p><strong>Hundred Chart<\/strong><\/p>\n<p>Question 6.<br \/>\nFill in the missing numbers on the part of the hundred chart.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-3759\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-Grade-1-Answer-Key-Topic-10-Use-Models-and-Strategies-to-Add-Tens-and-Ones-2.png\" alt=\"Envision Math Common Core Grade 1 Answer Key Topic 10 Use Models and Strategies to Add Tens and Ones 2\" width=\"300\" height=\"96\" \/><\/p>\n<p>Answer:<br \/>\nThe missing numbers are 42, 55, 58, 63, and 70.<\/p>\n<p>Explanation:<br \/>\nIn the above-given question,<br \/>\ngiven that,<br \/>\nthe numbers are from 41 to 70.<br \/>\nthe missing numbers on the part of the hundred charts:<br \/>\n42, 55, 58, 63, and 70.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-25727\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/07\/Envision-Math-Common-Core-1st-Grade-Answers-Key-Topic-10-Use-Models-and-Strategies-to-Add-Tens-and-Ones-2.png\" alt=\"\" width=\"276\" height=\"147\" \/><\/p>\n<p><strong>pick a Project<\/strong><\/p>\n<p><strong>PROJECT 10A<\/strong><\/p>\n<p>Has anyone ever called you the wrong name?<br \/>\nProject: Make a Manatee Facts Book<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-3760\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-Grade-1-Answer-Key-Topic-10-Use-Models-and-Strategies-to-Add-Tens-and-Ones-3.png\" alt=\"Envision Math Common Core Grade 1 Answer Key Topic 10 Use Models and Strategies to Add Tens and Ones 3\" width=\"480\" height=\"250\" \/><\/p>\n<p><strong>PROJECT 10B<\/strong><br \/>\nHave you ever aimed at a target?<br \/>\nProject: Play a Target Toss Game<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-3761\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-Grade-1-Answer-Key-Topic-10-Use-Models-and-Strategies-to-Add-Tens-and-Ones-4.png\" alt=\"Envision Math Common Core Grade 1 Answer Key Topic 10 Use Models and Strategies to Add Tens and Ones 4\" width=\"489\" height=\"274\" \/><\/p>\n<p><strong>PROJECT 10C<\/strong><br \/>\nWhat is as colorful as a butterfly?<br \/>\nProject: Make a Leaf and Egg Model<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-3762\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-Grade-1-Answer-Key-Topic-10-Use-Models-and-Strategies-to-Add-Tens-and-Ones-5.png\" alt=\"Envision Math Common Core Grade 1 Answer Key Topic 10 Use Models and Strategies to Add Tens and Ones 5\" width=\"486\" height=\"268\" \/><\/p>\n<p><strong>PROJECT 10D<\/strong><br \/>\nWhat would life be like without bones?<br \/>\nProject: Write and Draw an Octopus Story<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-3763\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-Grade-1-Answer-Key-Topic-10-Use-Models-and-Strategies-to-Add-Tens-and-Ones-6.png\" alt=\"Envision Math Common Core Grade 1 Answer Key Topic 10 Use Models and Strategies to Add Tens and Ones 6\" width=\"481\" height=\"297\" \/><\/p>\n<h3>Lesson 10.1 Add Tens Using Models<\/h3>\n<p><strong>Solve &amp; Share<\/strong><\/p>\n<p>How are these addition problems alike? Talk to a partner about how you can use the first sum to help you find the second.<\/p>\n<p><img loading=\"lazy\" class=\"alignnone size-full wp-image-3764\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-Grade-1-Answer-Key-Topic-10-Use-Models-and-Strategies-to-Add-Tens-and-Ones-7.png\" alt=\"Envision Math Common Core Grade 1 Answer Key Topic 10 Use Models and Strategies to Add Tens and Ones 7\" width=\"538\" height=\"515\" \/><\/p>\n<p>Answer:<br \/>\n3 + 5 = 8.<br \/>\n30 + 50 = 80.<\/p>\n<p>Explanation:<br \/>\nIn the above-given question,<br \/>\ngiven that,<br \/>\nadd the numbers.<br \/>\n3 + 5 = 8.<br \/>\n3 is in the tens place and 0 is in one place.<br \/>\n30 + 50 = 80.<\/p>\n<p><img loading=\"lazy\" class=\"alignnone size-full wp-image-25729\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/07\/Envision-Math-Common-Core-1st-Grade-Answers-Key-Topic-10-Use-Models-and-Strategies-to-Add-Tens-and-Ones-3-1.png\" alt=\"\" width=\"448\" height=\"428\" \/><\/p>\n<p><strong>Visual Learning Bridge<\/strong><br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-3765\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-Grade-1-Answer-Key-Topic-10-Use-Models-and-Strategies-to-Add-Tens-and-Ones-8.png\" alt=\"Envision Math Common Core Grade 1 Answer Key Topic 10 Use Models and Strategies to Add Tens and Ones 8\" width=\"785\" height=\"268\" \/><\/p>\n<p><strong>Convince Me!<\/strong><br \/>\nHow is adding 6 + 3 like adding 60 + 30?<\/p>\n<p>Answer:<br \/>\n6 tens + 3 tens = 90.<\/p>\n<p>Explanation:<br \/>\nIn the above-given question,<br \/>\ngiven that,<br \/>\n6 + 3 = 9.<br \/>\n6 tens + 3 tens.<br \/>\n6 tens = 60.<br \/>\n3 tens = 30.<br \/>\n60 + 30 = 90.<\/p>\n<p><strong>Guided Practice<\/strong><\/p>\n<p>Write the numbers to complete each equation.<\/p>\n<p>Question 1.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-3766\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-Grade-1-Answer-Key-Topic-10-Use-Models-and-Strategies-to-Add-Tens-and-Ones-9.png\" alt=\"Envision Math Common Core Grade 1 Answer Key Topic 10 Use Models and Strategies to Add Tens and Ones 9\" width=\"234\" height=\"219\" \/><\/p>\n<p>Answer:<br \/>\n30 + 40 = 70.<\/p>\n<p>Explanation:<br \/>\nIn the above-given question,<br \/>\ngiven that,<br \/>\n3 tens + 4 tens.<br \/>\n3 tens = 30.<br \/>\n4 tens = 40.<br \/>\n3 tens + 4 tens = 70.<\/p>\n<p>Question 2.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-3767\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-Grade-1-Answer-Key-Topic-10-Use-Models-and-Strategies-to-Add-Tens-and-Ones-10.png\" alt=\"Envision Math Common Core Grade 1 Answer Key Topic 10 Use Models and Strategies to Add Tens and Ones 10\" width=\"237\" height=\"222\" \/><\/p>\n<p>Answer:<br \/>\n10 + 50 = 60.<\/p>\n<p>Explanation:<br \/>\nIn the above-given question,<br \/>\ngiven that,<br \/>\n1 tens + 5 tens.<br \/>\n1 tens = 10.<br \/>\n5 tens = 50.<br \/>\n1 tens + 5 tens = 60.<\/p>\n<p><img loading=\"lazy\" class=\"alignnone size-full wp-image-25730\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/07\/Envision-Math-Common-Core-1st-Grade-Answers-Key-Topic-10-Use-Models-and-Strategies-to-Add-Tens-and-Ones-4.png\" alt=\"\" width=\"261\" height=\"227\" \/><\/p>\n<p><strong>Independent Practice<\/strong><\/p>\n<p>Write the numbers to complete each equation.<\/p>\n<p>Question 3.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-3768\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-Grade-1-Answer-Key-Topic-10-Use-Models-and-Strategies-to-Add-Tens-and-Ones-11.png\" alt=\"Envision Math Common Core Grade 1 Answer Key Topic 10 Use Models and Strategies to Add Tens and Ones 11\" width=\"194\" height=\"161\" \/><\/p>\n<p>Answer:<br \/>\n20 + 20 = 40.<\/p>\n<p>Explanation:<br \/>\nIn the above-given question,<br \/>\ngiven that,<br \/>\n2 tens + 2 tens.<br \/>\n2 tens = 20.<br \/>\n2 tens = 20.<br \/>\n2 tens + 2 tens = 40.<\/p>\n<p><img loading=\"lazy\" class=\"alignnone size-full wp-image-25733\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/07\/Envision-Math-Common-Core-1st-Grade-Answers-Key-Topic-10-Use-Models-and-Strategies-to-Add-Tens-and-Ones-5.png\" alt=\"\" width=\"194\" height=\"161\" \/><\/p>\n<p>Question 4.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-3769\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-Grade-1-Answer-Key-Topic-10-Use-Models-and-Strategies-to-Add-Tens-and-Ones-12.png\" alt=\"Envision Math Common Core Grade 1 Answer Key Topic 10 Use Models and Strategies to Add Tens and Ones 12\" width=\"199\" height=\"152\" \/><\/p>\n<p>Answer:<br \/>\n50 + 30 = 80.<\/p>\n<p>Explanation:<br \/>\nIn the above-given question,<br \/>\ngiven that,<br \/>\n5 tens + 3 tens.<br \/>\n5 tens = 50.<br \/>\n3 tens = 30.<br \/>\n5 tens + 3 tens = 80.<\/p>\n<p><img loading=\"lazy\" class=\"alignnone size-full wp-image-25735\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/07\/Envision-Math-Common-Core-1st-Grade-Answers-Key-Topic-10-Use-Models-and-Strategies-to-Add-Tens-and-Ones-6.png\" alt=\"\" width=\"208\" height=\"148\" \/><\/p>\n<p>Question 5.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-3770\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-Grade-1-Answer-Key-Topic-10-Use-Models-and-Strategies-to-Add-Tens-and-Ones-13.png\" alt=\"Envision Math Common Core Grade 1 Answer Key Topic 10 Use Models and Strategies to Add Tens and Ones 13\" width=\"190\" height=\"159\" \/><\/p>\n<p>Answer:<br \/>\n30 + 10 = 40.<\/p>\n<p>Explanation:<br \/>\nIn the above-given question,<br \/>\ngiven that,<br \/>\n3 tens + 1 tens.<br \/>\n3 tens = 30.<br \/>\n1 tens = 10.<br \/>\n3 tens + 1 tens = 40.<\/p>\n<p><img loading=\"lazy\" class=\"alignnone size-full wp-image-25736\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/07\/Envision-Math-Common-Core-1st-Grade-Answers-Key-Topic-10-Use-Models-and-Strategies-to-Add-Tens-and-Ones-7.png\" alt=\"\" width=\"186\" height=\"134\" \/><\/p>\n<p>Question 6.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-3771\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-Grade-1-Answer-Key-Topic-10-Use-Models-and-Strategies-to-Add-Tens-and-Ones-14.png\" alt=\"Envision Math Common Core Grade 1 Answer Key Topic 10 Use Models and Strategies to Add Tens and Ones 14\" width=\"197\" height=\"153\" \/><\/p>\n<p>Answer:<br \/>\n10 + 10 = 20.<\/p>\n<p>Explanation:<br \/>\nIn the above-given question,<br \/>\ngiven that,<br \/>\n1 tens + 1 tens.<br \/>\n1 tens = 10.<br \/>\n1 tens = 10.<br \/>\n1 tens + 1 tens = 20.<\/p>\n<p><img loading=\"lazy\" class=\"alignnone size-full wp-image-25738\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/07\/Envision-Math-Common-Core-1st-Grade-Answers-Key-Topic-10-Use-Models-and-Strategies-to-Add-Tens-and-Ones-8.png\" alt=\"\" width=\"190\" height=\"157\" \/><\/p>\n<p>Question 7.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-3772\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-Grade-1-Answer-Key-Topic-10-Use-Models-and-Strategies-to-Add-Tens-and-Ones-15.png\" alt=\"Envision Math Common Core Grade 1 Answer Key Topic 10 Use Models and Strategies to Add Tens and Ones 15\" width=\"187\" height=\"153\" \/><br \/>\nAnswer:<br \/>\n40 + 40 = 80.<\/p>\n<p>Explanation:<br \/>\nIn the above-given question,<br \/>\ngiven that,<br \/>\n4 tens + 4 tens.<br \/>\n4 tens = 40.<br \/>\n4 tens = 40.<br \/>\n4 tens + 4 tens = 80.<\/p>\n<p><img loading=\"lazy\" class=\"alignnone size-full wp-image-25739\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/07\/Envision-Math-Common-Core-1st-Grade-Answers-Key-Topic-10-Use-Models-and-Strategies-to-Add-Tens-and-Ones-9.png\" alt=\"\" width=\"195\" height=\"145\" \/><\/p>\n<p>Question 8.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-3773\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-Grade-1-Answer-Key-Topic-10-Use-Models-and-Strategies-to-Add-Tens-and-Ones-16.png\" alt=\"Envision Math Common Core Grade 1 Answer Key Topic 10 Use Models and Strategies to Add Tens and Ones 16\" width=\"190\" height=\"146\" \/><\/p>\n<p>Answer:<br \/>\n20 + 50 = 70.<\/p>\n<p>Explanation:<br \/>\nIn the above-given question,<br \/>\ngiven that,<br \/>\n2 tens + 5 tens.<br \/>\n2 tens = 20.<br \/>\n5 tens = 50.<br \/>\n2 tens + 5 tens = 70.<\/p>\n<p><img loading=\"lazy\" class=\"alignnone size-full wp-image-25740\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/07\/Envision-Math-Common-Core-1st-Grade-Answers-Key-Topic-10-Use-Models-and-Strategies-to-Add-Tens-and-Ones-10.png\" alt=\"\" width=\"158\" height=\"126\" \/><\/p>\n<p>Question 9.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-3774\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-Grade-1-Answer-Key-Topic-10-Use-Models-and-Strategies-to-Add-Tens-and-Ones-17.png\" alt=\"Envision Math Common Core Grade 1 Answer Key Topic 10 Use Models and Strategies to Add Tens and Ones 17\" width=\"190\" height=\"147\" \/><\/p>\n<p>Answer:<br \/>\n30 + 30 = 60.<\/p>\n<p>Explanation:<br \/>\nIn the above-given question,<br \/>\ngiven that,<br \/>\n3 tens + 3 tens.<br \/>\n3 tens = 30.<br \/>\n3 tens = 30.<br \/>\n3 tens + 3 tens = 60.<\/p>\n<p><img loading=\"lazy\" class=\"alignnone size-full wp-image-25741\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/07\/Envision-Math-Common-Core-1st-Grade-Answers-Key-Topic-10-Use-Models-and-Strategies-to-Add-Tens-and-Ones-11.png\" alt=\"\" width=\"178\" height=\"150\" \/><\/p>\n<p>Question 10.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-3775\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-Grade-1-Answer-Key-Topic-10-Use-Models-and-Strategies-to-Add-Tens-and-Ones-18.png\" alt=\"Envision Math Common Core Grade 1 Answer Key Topic 10 Use Models and Strategies to Add Tens and Ones 18\" width=\"191\" height=\"149\" \/><\/p>\n<p>Answer:<br \/>\n10 + 40 = 50.<\/p>\n<p>Explanation:<br \/>\nIn the above-given question,<br \/>\ngiven that,<br \/>\n1 tens + 4 tens.<br \/>\n1 tens = 10.<br \/>\n4 tens = 40.<br \/>\n1 tens + 4 tens = 50.<\/p>\n<p><img loading=\"lazy\" class=\"alignnone size-full wp-image-25742\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/07\/Envision-Math-Common-Core-1st-Grade-Answers-Key-Topic-10-Use-Models-and-Strategies-to-Add-Tens-and-Ones-12.png\" alt=\"\" width=\"213\" height=\"136\" \/><\/p>\n<p>Question 11.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-3776\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-Grade-1-Answer-Key-Topic-10-Use-Models-and-Strategies-to-Add-Tens-and-Ones-19.png\" alt=\"Envision Math Common Core Grade 1 Answer Key Topic 10 Use Models and Strategies to Add Tens and Ones 19\" width=\"213\" height=\"147\" \/><\/p>\n<p>Answer:<br \/>\n50 + 40 = 90.<\/p>\n<p>Explanation:<br \/>\nIn the above-given question,<br \/>\ngiven that,<br \/>\n5 tens + 4 tens.<br \/>\n5 tens = 50.<br \/>\n4 tens = 40.<br \/>\n5 tens + 4 tens = 90.<\/p>\n<p><img loading=\"lazy\" class=\"alignnone size-full wp-image-25744\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/07\/Envision-Math-Common-Core-1st-Grade-Answers-Key-Topic-10-Use-Models-and-Strategies-to-Add-Tens-and-Ones-13.png\" alt=\"\" width=\"207\" height=\"180\" \/><\/p>\n<p><strong>Problem Solving<\/strong><br \/>\nAdd tens to solve. Use place-value blocks if needed.<\/p>\n<p>Question 12.<br \/>\n<strong>Make Sense<\/strong> Alex and Annie each have 5 boxes of crayons. Each box has 10 crayons.<br \/>\nHow many crayons do Alex and Annie have in all?<br \/>\n___ + ___ = ___<br \/>\n___ crayons<\/p>\n<p>Answer:<br \/>\nThe number of crayons do Alex and Annie have in all = 100.<\/p>\n<p>Explanation:<br \/>\nIn the above-given question,<br \/>\ngiven that,<br \/>\nAlex and Annie each have 5 boxes of crayons.<br \/>\nEach box has 10 crayons.<br \/>\n5 x 10 = 50.<br \/>\n50 + 50 = 100.<br \/>\nso the number of crayons do Alex and Annie have in all = 100.<\/p>\n<p>Question 13.<br \/>\n<strong>Make Sense<\/strong> Becky and Dan buy some bottles of juice. Becky buys 6 bottles. Dan buys 2 bottles. Each bottle of juice is enough for 10 people. How many people do Dan and Becky have enough juice for?<br \/>\n___ + __ = ___<br \/>\n___ people<\/p>\n<p>Answer:<br \/>\nThe number of people do Dan and Becky have enough for = 80.<\/p>\n<p>Explanation:<br \/>\nIn the above-given question,<br \/>\ngiven that,<br \/>\nBecky and Dan buy some bottles of juice.<br \/>\nBecky buys 6 bottles.<br \/>\nDan buys 2 bottles.<br \/>\nEach bottle of juice is enough for 10 people.<br \/>\n6 x 10 = 60.<br \/>\n2 x 10 = 20.<br \/>\n60 + 20 = 80.<\/p>\n<p>Question 14.<br \/>\n<strong>Higher Order Thinking<\/strong> Bree says that she knows 4 + 3 = 7, so she also knows that 30 + 40 = 70. Is she correct? Explain how you know.<\/p>\n<p>Answer:<br \/>\nYes, she was correct.<\/p>\n<p>Explanation:<br \/>\nIn the above-given question,<br \/>\ngiven that,<br \/>\n4 + 3 = 7.<br \/>\n30 + 40 = 70.<br \/>\n3 tens + 4 tens = 7 tens.<br \/>\nso she was correct.<\/p>\n<p>Question 15.<br \/>\n<strong>Assessment Practice<\/strong> Which equation matches the picture?<br \/>\nA. 2 + 3 = 5<br \/>\nB. 3 + 2 = 5<br \/>\nC. 20+ 3 = 23<br \/>\nD. 20 + 30 = 50<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-3777\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-Grade-1-Answer-Key-Topic-10-Use-Models-and-Strategies-to-Add-Tens-and-Ones-20.png\" alt=\"Envision Math Common Core Grade 1 Answer Key Topic 10 Use Models and Strategies to Add Tens and Ones 20\" width=\"144\" height=\"123\" \/><\/p>\n<p>Answer:<br \/>\nOption D is correct.<\/p>\n<p>Explanation:<br \/>\nIn the above-given question,<br \/>\ngiven that,<br \/>\n2 tens + 3 tens.<br \/>\n2 tens = 20.<br \/>\n3 tens = 30.<br \/>\n20 + 30 = 50.<br \/>\nso option D is correct.<\/p>\n<h3>Lesson 10.2 Mental Math: Ten More Than a Number<\/h3>\n<p><strong>Solve &amp; Share<\/strong><\/p>\n<p>Solve each problem. What pattern do you see in the totals?<\/p>\n<p><img loading=\"lazy\" class=\"alignnone size-full wp-image-3778\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-Grade-1-Answer-Key-Topic-10-Use-Models-and-Strategies-to-Add-Tens-and-Ones-21.png\" alt=\"Envision Math Common Core Grade 1 Answer Key Topic 10 Use Models and Strategies to Add Tens and Ones 21\" width=\"577\" height=\"487\" \/><\/p>\n<p>Answer:<br \/>\n15 + 10 = 25.<br \/>\n25 + 10 = 35.<br \/>\n55 + 10 = 65.<\/p>\n<p>Explanation:<br \/>\nIn the above-given question,<br \/>\ngiven that,<br \/>\nAdd the numbers.<br \/>\n15 + 10 = 25.<br \/>\n25 + 10 = 35.<br \/>\n55 + 10 = 65.<\/p>\n<p><img loading=\"lazy\" class=\"alignnone size-full wp-image-25745\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/07\/Envision-Math-Common-Core-1st-Grade-Answers-Key-Topic-10-Use-Models-and-Strategies-to-Add-Tens-and-Ones-14.png\" alt=\"\" width=\"457\" height=\"405\" \/><\/p>\n<p><strong>Visual Learning Bridge<\/strong><br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-3779\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-Grade-1-Answer-Key-Topic-10-Use-Models-and-Strategies-to-Add-Tens-and-Ones-22.png\" alt=\"Envision Math Common Core Grade 1 Answer Key Topic 10 Use Models and Strategies to Add Tens and Ones 22\" width=\"792\" height=\"245\" \/><\/p>\n<p><strong>Convince Me!<\/strong><br \/>\nExplain how you can use mental math to add 10 to 47.<\/p>\n<p>Answer:<br \/>\n10 + 47 = 57.<\/p>\n<p>Explanation:<br \/>\nIn the above-given question,<br \/>\ngiven that,<br \/>\n4 + 1 = 5.<br \/>\n47 + 10 = 57.<br \/>\n5 tens + 7 ones = 57.<\/p>\n<p><strong>Guided Practice<\/strong><\/p>\n<p>Use mental math to solve the problems.<\/p>\n<p>Question 1.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-3780\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-Grade-1-Answer-Key-Topic-10-Use-Models-and-Strategies-to-Add-Tens-and-Ones-23.png\" alt=\"Envision Math Common Core Grade 1 Answer Key Topic 10 Use Models and Strategies to Add Tens and Ones 23\" width=\"212\" height=\"183\" \/><\/p>\n<p>Answer:<br \/>\n10 + 25 = 35.<\/p>\n<p>Explanation:<br \/>\nIn the above-given question,<br \/>\ngiven that,<br \/>\n2 + 1 = 3.<br \/>\n25 + 10 = 35.<br \/>\n3 tens + 5 ones = 35.<\/p>\n<p>Question 2.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-3781\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-Grade-1-Answer-Key-Topic-10-Use-Models-and-Strategies-to-Add-Tens-and-Ones-24.png\" alt=\"Envision Math Common Core Grade 1 Answer Key Topic 10 Use Models and Strategies to Add Tens and Ones 24\" width=\"203\" height=\"172\" \/><\/p>\n<p>Answer:<br \/>\n10 + 12 = 22.<\/p>\n<p>Explanation:<br \/>\nIn the above-given question,<br \/>\ngiven that,<br \/>\n1 + 1 = 2.<br \/>\n12 + 10 = 22.<br \/>\n2 tens + 2 ones = 22.<\/p>\n<p><img loading=\"lazy\" class=\"alignnone size-full wp-image-25747\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/07\/Envision-Math-Common-Core-1st-Grade-Answers-Key-Topic-10-Use-Models-and-Strategies-to-Add-Tens-and-Ones-15.png\" alt=\"\" width=\"219\" height=\"184\" \/><\/p>\n<p><strong>Independent Practice<\/strong><\/p>\n<p>Use mental math to solve each equation.<\/p>\n<p>Question 3.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-3782\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-Grade-1-Answer-Key-Topic-10-Use-Models-and-Strategies-to-Add-Tens-and-Ones-25.png\" alt=\"Envision Math Common Core Grade 1 Answer Key Topic 10 Use Models and Strategies to Add Tens and Ones 25\" width=\"200\" height=\"122\" \/><br \/>\n58 + 10 = ___<\/p>\n<p>Answer:<br \/>\n10 + 58 = 68.<\/p>\n<p>Explanation:<br \/>\nIn the above-given question,<br \/>\ngiven that,<br \/>\n5 + 1 = 6.<br \/>\n58 + 10 = 68.<br \/>\n6 tens + 8 ones = 68.<\/p>\n<p>Question 4.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-3783\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-Grade-1-Answer-Key-Topic-10-Use-Models-and-Strategies-to-Add-Tens-and-Ones-26.png\" alt=\"Envision Math Common Core Grade 1 Answer Key Topic 10 Use Models and Strategies to Add Tens and Ones 26\" width=\"161\" height=\"125\" \/><br \/>\n44 + 10 = ___<\/p>\n<p>Answer:<br \/>\n10 + 44 = 54.<\/p>\n<p>Explanation:<br \/>\nIn the above-given question,<br \/>\ngiven that,<br \/>\n4 + 1 = 5.<br \/>\n44 + 10 = 54.<br \/>\n5 tens + 4 ones = 54.<\/p>\n<p>Question 5.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-3784\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-Grade-1-Answer-Key-Topic-10-Use-Models-and-Strategies-to-Add-Tens-and-Ones-27.png\" alt=\"Envision Math Common Core Grade 1 Answer Key Topic 10 Use Models and Strategies to Add Tens and Ones 27\" width=\"149\" height=\"121\" \/><br \/>\n35 + 10 = ___<\/p>\n<p>Answer:<br \/>\n10 + 35 = 45.<\/p>\n<p>Explanation:<br \/>\nIn the above-given question,<br \/>\ngiven that,<br \/>\n3 + 1 = 4.<br \/>\n35 + 10 = 45.<br \/>\n4 tens + 5 ones = 45.<\/p>\n<p>Question 6.<br \/>\n10 + 72 = ___<\/p>\n<p>Answer:<br \/>\n10 + 72 = 82.<\/p>\n<p>Explanation:<br \/>\nIn the above-given question,<br \/>\ngiven that,<br \/>\n7 + 1 = 8.<br \/>\n72 + 10 = 82.<br \/>\n8 tens + 2 ones = 82.<\/p>\n<p>Question 7.<br \/>\n87 + 10 = ___<\/p>\n<p>Answer:<br \/>\n10 + 87 = 97.<\/p>\n<p>Explanation:<br \/>\nIn the above-given question,<br \/>\ngiven that,<br \/>\n8 + 1 = 9.<br \/>\n87 + 10 = 97.<br \/>\n9 tens + 7 ones = 97.<\/p>\n<p>Question 8.<br \/>\n31 + 10 = ___<\/p>\n<p>Answer:<br \/>\n10 + 31 = 41.<\/p>\n<p>Explanation:<br \/>\nIn the above-given question,<br \/>\ngiven that,<br \/>\n3 + 1 = 4.<br \/>\n31 + 10 = 41.<br \/>\n4 tens + 1 ones = 41.<\/p>\n<p>Question 9.<br \/>\n18 + 10 = ___<\/p>\n<p>Answer:<br \/>\n10 + 18 = 28.<\/p>\n<p>Explanation:<br \/>\nIn the above-given question,<br \/>\ngiven that,<br \/>\n1 + 1 = 2.<br \/>\n18 + 10 = 28.<br \/>\n2 tens + 8 ones = 28.<\/p>\n<p>Question 10.<br \/>\n10 + 26 = ___<\/p>\n<p>Answer:<br \/>\n10 + 26 = 36.<\/p>\n<p>Explanation:<br \/>\nIn the above-given question,<br \/>\ngiven that,<br \/>\n2 + 1 = 3.<br \/>\n26 + 10 = 36.<br \/>\n3 tens + 6 ones = 36.<\/p>\n<p>Question 11.<br \/>\n9 + 10 = ___<\/p>\n<p>Answer:<br \/>\n10 + 9 = 19.<\/p>\n<p>Explanation:<br \/>\nIn the above-given question,<br \/>\ngiven that,<br \/>\n9 + 1 = 10.<br \/>\n9 + 10 = 19.<br \/>\n1 tens + 9 ones = 19.<\/p>\n<p>Question 12.<br \/>\n<strong>Number Sense<\/strong> Winnie used place-value blocks to show 29 + 10. She said the answer is 30. Is Winnie correct? Explain how you know.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-3785\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-Grade-1-Answer-Key-Topic-10-Use-Models-and-Strategies-to-Add-Tens-and-Ones-28.1.png\" alt=\"Envision Math Common Core Grade 1 Answer Key Topic 10 Use Models and Strategies to Add Tens and Ones 28.1\" width=\"142\" height=\"119\" \/><\/p>\n<p>Answer:<br \/>\nNo, Winnie was not correct.<\/p>\n<p>Explanation:<br \/>\nIn the above-given question,<br \/>\ngiven that,<br \/>\nWinnie used place-value blocks to show 29 + 10.<br \/>\n29 + 10 = 39.<br \/>\nso Winnie was not correct.<\/p>\n<p><strong>Problem Solving<\/strong><\/p>\n<p>Use mental math to solve the problems below.<\/p>\n<p>Question 13.<br \/>\n<strong>Reasoning<\/strong> Sam makes 15 dollars mowing lawns one day. He makes 10 dollars the next day. How many dollars did Sam make in all?<br \/>\n____ dollars<\/p>\n<p>Answer:<br \/>\nThe number of dollars did Sam make in all = 25.<\/p>\n<p>Explanation:<br \/>\nIn the above-given question,<br \/>\ngiven that,<br \/>\nSam makes 15 dollars mowing lawns one day.<br \/>\nHe makes 10 dollars the next day.<br \/>\n15 + 10 = 25.<br \/>\nso the number of dollars did Sam make in all = 25.<\/p>\n<p>Question 14.<br \/>\n<strong>Reasoning<\/strong> Tess solves 22 math problems. Then she solves 10 more math problems. How many math problems did Tess solve in all?<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-3786\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-Grade-1-Answer-Key-Topic-10-Use-Models-and-Strategies-to-Add-Tens-and-Ones-28.2.png\" alt=\"Envision Math Common Core Grade 1 Answer Key Topic 10 Use Models and Strategies to Add Tens and Ones 28.2\" width=\"250\" height=\"173\" \/><br \/>\n___ math problems<\/p>\n<p>Answer:<br \/>\nThe math problems did Tess solve in all = 32.<\/p>\n<p>Explanation:<br \/>\nIn the above-given question,<br \/>\ngiven that,<br \/>\nTess solves 22 math problems.<br \/>\nThen she solves 10 more math problems.<br \/>\n22 + 10 = 32.<br \/>\n2 + 1 = 3.<br \/>\nso the math problems did Tess solve in all = 32.<\/p>\n<p>Question 15.<br \/>\n<strong>Higher Order Thinking<\/strong> Roger collects 75 cans. Ella collects some cans. Roger and Ella have 85 cans together. How many cans did Ella collect?<br \/>\n___ cans<\/p>\n<p>Answer:<br \/>\nThe number of cans Ella collect = 10.<\/p>\n<p>Explanation:<br \/>\nIn the above-given question,<br \/>\ngiven that,<br \/>\nRoger collects 75 cans.<br \/>\nElla collects some cans.<br \/>\nRoger and Ella have 85 cans together.<br \/>\n85 &#8211; 75 = 10.<br \/>\nso the number of cans Ella collect = 10.<\/p>\n<p>Question 16.<br \/>\n<strong>Assessment Practice<\/strong> Match each pair of addends with their sum.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-3787\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-Grade-1-Answer-Key-Topic-10-Use-Models-and-Strategies-to-Add-Tens-and-Ones-28.3.png\" alt=\"Envision Math Common Core Grade 1 Answer Key Topic 10 Use Models and Strategies to Add Tens and Ones 28.3\" width=\"250\" height=\"160\" \/><\/p>\n<p>Answer:<br \/>\n27 = 17 + 10.<br \/>\n86 = 76 + 10.<br \/>\n43 = 33 + 10.<br \/>\n51 = 41 + 10.<br \/>\n69 = 59 + 10.<\/p>\n<p>Explanation:<br \/>\nIn the above-given question,<br \/>\ngiven that,<br \/>\n27 = 2 tens + 7 ones.<br \/>\n86 = 8 tens + 6 ones.<br \/>\n43 = 4 tens + 3 ones.<br \/>\n51 = 5 tens + 1 ones.<br \/>\n69 = 6 tens + 9 ones.<br \/>\n27 = 17 + 10.<br \/>\n86 = 76 + 10.<br \/>\n43 = 33 + 10.<br \/>\n51 = 41 + 10.<br \/>\n69 = 59 + 10.<\/p>\n<h3>Lesson 10.3 Add Tens and Ones Using a Hundred Chart<\/h3>\n<p><strong>Solve &amp; Share<\/strong><br \/>\nUse a hundred chart to find these sums. 8 + 40 = ? 30 + 40 = ? 80 + 12 = ?<br \/>\nShow your work and tell how you found each sum.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-3788\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-Grade-1-Answer-Key-Topic-10-Use-Models-and-Strategies-to-Add-Tens-and-Ones-28.4.png\" alt=\"Envision Math Common Core Grade 1 Answer Key Topic 10 Use Models and Strategies to Add Tens and Ones 28.4\" width=\"526\" height=\"276\" \/><\/p>\n<p><strong>Visual Learning Bridge<\/strong><br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-3789\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-Grade-1-Answer-Key-Topic-10-Use-Models-and-Strategies-to-Add-Tens-and-Ones-28.5.png\" alt=\"Envision Math Common Core Grade 1 Answer Key Topic 10 Use Models and Strategies to Add Tens and Ones 28.5\" width=\"775\" height=\"244\" \/><\/p>\n<p><strong>Convince Me!<\/strong><br \/>\nHow could you use the hundred chart to find the sum of 6 and 50?<\/p>\n<p><strong>Guided Practice<\/strong><\/p>\n<p>Use the part of the hundred chart to add.<\/p>\n<p>Question 1.<br \/>\n2 + 12 = <u>14<\/u><\/p>\n<p>Answer:<br \/>\n2 + 12 = 14.<\/p>\n<p>Explanation:<br \/>\nIn the above-given question,<br \/>\ngiven that,<br \/>\n12 has 1 ten and 2 ones.<br \/>\nso 12 is 1 row down on the chart.<br \/>\n2 is 2 ones.<br \/>\n2 + 12 = 14.<\/p>\n<p>Question 2.<br \/>\n5 + 40 = ___<\/p>\n<p>Answer:<br \/>\n5 + 40 = 45.<\/p>\n<p>Explanation:<br \/>\nIn the above-given question,<br \/>\ngiven that,<br \/>\n40 has 4 tens and 0 ones.<br \/>\nso 40 is 1 row down on the chart.<br \/>\n5 is 5 ones.<br \/>\n5 + 40 = 45.<\/p>\n<p>Question 3.<br \/>\n13 + 20 = ___<\/p>\n<p>Answer:<br \/>\n13 + 20 = 33.<\/p>\n<p>Explanation:<br \/>\nIn the above-given question,<br \/>\ngiven that,<br \/>\n33 has 3 tens and 3 ones.<br \/>\nso 33 is 1 row down on the chart.<br \/>\n13 is\u00a0 1 ten 3 ones.<br \/>\n13 + 20 = 33.<\/p>\n<p><img loading=\"lazy\" class=\"alignnone size-full wp-image-3794\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-Grade-1-Answer-Key-Topic-10-Use-Models-and-Strategies-to-Add-Tens-and-Ones-28.56.png\" alt=\"Envision Math Common Core Grade 1 Answer Key Topic 10 Use Models and Strategies to Add Tens and Ones 28.56\" width=\"297\" height=\"151\" \/><\/p>\n<p>Question 4.<br \/>\n10 + 31 = ___<\/p>\n<p>Answer:<br \/>\n10 + 31 = 41.<\/p>\n<p>Explanation:<br \/>\nIn the above-given question,<br \/>\ngiven that,<br \/>\n41 has 4 ten and 1 ones.<br \/>\nso 31 is 1 row down on the chart.<br \/>\n10 is 10 ones.<br \/>\n10 + 31 = 41.<\/p>\n<p>Question 5.<\/p>\n<p>32 + 6 = ___<\/p>\n<p>Answer:<br \/>\n6 + 32 = 38.<\/p>\n<p>Explanation:<br \/>\nIn the above-given question,<br \/>\ngiven that,<br \/>\n32 has 3 ten and 2 ones.<br \/>\nso 32 is 1 row down on the chart.<br \/>\n6 is 6 ones.<br \/>\n6 + 32 = 38.<\/p>\n<p><strong>Independent Practice<\/strong><\/p>\n<p>Use the hundred chart to add.<\/p>\n<p><img loading=\"lazy\" class=\"alignnone size-full wp-image-3790\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-Grade-1-Answer-Key-Topic-10-Use-Models-and-Strategies-to-Add-Tens-and-Ones-28.6.png\" alt=\"Envision Math Common Core Grade 1 Answer Key Topic 10 Use Models and Strategies to Add Tens and Ones 28.6\" width=\"347\" height=\"289\" \/><\/p>\n<p>Question 6.<br \/>\n7 + 60 = ____<\/p>\n<p>Answer:<br \/>\n7 + 60 = 67.<\/p>\n<p>Explanation:<br \/>\nIn the above-given question,<br \/>\ngiven that,<br \/>\n67 has 6 ten and 7 ones.<br \/>\nso 67 is 1 row down on the chart.<br \/>\n7 is 7 ones.<br \/>\n7 + 60 = 67.<\/p>\n<p>Question 7.<br \/>\n33 + 20 = ___<\/p>\n<p>Answer:<br \/>\n33 + 20 = 53.<\/p>\n<p>Explanation:<br \/>\nIn the above-given question,<br \/>\ngiven that,<br \/>\n53 has 5 ten and 3 ones.<br \/>\nso 53 is 1 row down on the chart.<br \/>\n20 is 20 ones.<br \/>\n33 + 20 = 53.<\/p>\n<p>Question 8.<br \/>\n20 + 18 = ___<\/p>\n<p>Answer:<br \/>\n18 + 20 = 38.<\/p>\n<p>Explanation:<br \/>\nIn the above-given question,<br \/>\ngiven that,<br \/>\n38 has 3 ten and 8 ones.<br \/>\nso 18 is 1 row down on the chart.<br \/>\n2 is 2 tens.<br \/>\n18 + 20 = 38.<\/p>\n<p>Question 9.<br \/>\n5 + 13 = ___<\/p>\n<p>Answer:<br \/>\n5 + 13 = 18.<\/p>\n<p>Explanation:<br \/>\nIn the above-given question,<br \/>\ngiven that,<br \/>\n13 has 1 ten and 3 ones.<br \/>\nso 5 is 1 row down on the chart.<br \/>\n5 is 5 ones.<br \/>\n5 + 13 = 18.<\/p>\n<p>Question 10.<br \/>\n3 + 26 = ___<\/p>\n<p>Answer:<br \/>\n3 + 26 = 29.<\/p>\n<p>Explanation:<br \/>\nIn the above-given question,<br \/>\ngiven that,<br \/>\n29 has 2 ten and 9 ones.<br \/>\nso 3 is 2 rows down on the chart.<br \/>\n3 is 3 ones.<br \/>\n3 + 26 = 29.<\/p>\n<p>Question 11.<br \/>\n1 + 41 = ___<\/p>\n<p>Answer:<br \/>\n1 + 41 = 51.<\/p>\n<p>Explanation:<br \/>\nIn the above-given question,<br \/>\ngiven that,<br \/>\n51 has 5 ten and 1 ones.<br \/>\nso 1 is 4 rows down on the chart.<br \/>\n1 is 1 one.<br \/>\n1 + 41 = 51.<\/p>\n<p>Question 12.<br \/>\n4 + 32 = ___<\/p>\n<p>Answer:<br \/>\n4 + 32 = 36.<\/p>\n<p>Explanation:<br \/>\nIn the above-given question,<br \/>\ngiven that,<br \/>\n36 has 3 ten and 6 ones.<br \/>\nso 3 is 3 rows down on the chart.<br \/>\n4 is 4 ones.<br \/>\n4 + 32 = 36.<\/p>\n<p>Question 13.<br \/>\n56 + 2 = ___<\/p>\n<p>Answer:<br \/>\n2 + 56 = 58.<\/p>\n<p>Explanation:<br \/>\nIn the above-given question,<br \/>\ngiven that,<br \/>\n58 has 5 tens and 8 ones.<br \/>\nso 2 is 5 rows down on the chart.<br \/>\n2 is 2 ones.<br \/>\n2 + 56 = 58.<\/p>\n<p>Question 14.<br \/>\n10 + 85 = __<\/p>\n<p>Answer:<br \/>\n10 + 85 = 95.<\/p>\n<p>Explanation:<br \/>\nIn the above-given question,<br \/>\ngiven that,<br \/>\n85 has 8 ten and 5 ones.<br \/>\nso 10 is 8 rows down on the chart.<br \/>\n10 is 10 ones.<br \/>\n10 + 85 = 95.<\/p>\n<p>Question 15.<br \/>\n7 + 12 = ___<\/p>\n<p>Answer:<br \/>\n7 + 12 = 19.<\/p>\n<p>Explanation:<br \/>\nIn the above-given question,<br \/>\ngiven that,<br \/>\n19 has 1 ten and 9 ones.<br \/>\nso 7 is 1 row down on the chart.<br \/>\n7 is 7 ones.<br \/>\n7 + 12 = 19.<\/p>\n<p>Question 16.<br \/>\n50 + 13 = ___<\/p>\n<p>Answer:<br \/>\n13 + 50 = 63.<\/p>\n<p>Explanation:<br \/>\nIn the above-given question,<br \/>\ngiven that,<br \/>\n63 has 6 ten and 3 ones.<br \/>\nso 13 is 4 rows down on the chart.<br \/>\n13 is 13 ones.<br \/>\n13 + 50 = 63.<\/p>\n<p>Question 17.<br \/>\n71 + 5 = ___<\/p>\n<p>Answer:<br \/>\n71 + 5 = 76.<\/p>\n<p>Explanation:<br \/>\nIn the above-given question,<br \/>\ngiven that,<br \/>\n76 has 7 ten and 6 ones.<br \/>\nso 71 is 1 row down on the chart.<br \/>\n5 is 5 ones.<br \/>\n71 + 5 = 76.<\/p>\n<p>Question 18.<br \/>\n<strong>Higher Order Thinking<\/strong> Sue had some stickers in a book. She bought 30 more stickers. Now she has 36 stickers in her book. How many stickers did Sue have in the book at the start?<br \/>\n_____ stickers<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-3791\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-Grade-1-Answer-Key-Topic-10-Use-Models-and-Strategies-to-Add-Tens-and-Ones-28.9.png\" alt=\"Envision Math Common Core Grade 1 Answer Key Topic 10 Use Models and Strategies to Add Tens and Ones 28.9\" width=\"340\" height=\"238\" \/><\/p>\n<p>Answer:<br \/>\nThe number of stickers did Sue have in the book at start = 6.<\/p>\n<p>Explanation:<br \/>\nIn the above-given question,<br \/>\ngiven that,<br \/>\nSue had some stickers in a book.<br \/>\nShe bought 30 more stickers.<br \/>\nNow she has 36 stickers in her book.<br \/>\n36 &#8211; 30 = 6.<br \/>\nso the number of stickers did Sue have in the book at start = 6.<\/p>\n<p><strong>Problem Solving<\/strong><\/p>\n<p>Use the hundred chart to solve each problem below.<\/p>\n<p><img loading=\"lazy\" class=\"alignnone size-full wp-image-3792\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-Grade-1-Answer-Key-Topic-10-Use-Models-and-Strategies-to-Add-Tens-and-Ones-28.10.png\" alt=\"Envision Math Common Core Grade 1 Answer Key Topic 10 Use Models and Strategies to Add Tens and Ones 28.10\" width=\"355\" height=\"293\" \/><\/p>\n<p>Question 19.<br \/>\n<strong>Use Tools<\/strong> Some hens lay 40 eggs. Then they lay 45 more eggs. How many eggs did the hens lay in all?<br \/>\n___ eggs<\/p>\n<p>Answer:<br \/>\nThe number of eggs did the hens lay in all = 85.<\/p>\n<p>Explanation:<br \/>\nIn the above-given question,<br \/>\ngiven that,<br \/>\nSome hens lay 40 eggs.<br \/>\nThen they lay 45 more eggs.<br \/>\n40 + 45 = 85.<br \/>\nso the number of eggs did the hens lay in all = 85.<\/p>\n<p>Question 20.<br \/>\n<strong>Use Tools<\/strong> 22 students are at the book fair. More students came to the book fair later. There are 72 students in all at the book fair. How many students came later?<br \/>\n____ students<\/p>\n<p>Answer:<br \/>\nThe number of students who came later = 52.<\/p>\n<p>Explanation:<br \/>\nIn the above-given question,<br \/>\ngiven that,<br \/>\n22 students are at the book fair.<br \/>\nMore students came to the book fair later.<br \/>\nThere are 72 students in all at the book fair.<br \/>\n72 &#8211; 22 = 52.<br \/>\nso the number of students who came later = 52.<\/p>\n<p>Question 21.<br \/>\n<strong>Higher Order Thinking<\/strong> Write a number story for 3 + 42.<\/p>\n<p>Answer:<br \/>\n3 + 42 = 45.<\/p>\n<p>Explanation:<br \/>\nIn the above-given question,<br \/>\ngiven that,<br \/>\n3 + 42 = 45.<br \/>\n42 + 1 = 43.<br \/>\n43 + 1 = 44.<br \/>\n44 + 1 = 45.<br \/>\n3 + 42 = 45.<\/p>\n<p>Question 22.<br \/>\n<strong>Assessment Practice<\/strong> Use the hundred chart. Which equations show the correct sum for 50 + 8? Choose two that apply.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-3793\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-Grade-1-Answer-Key-Topic-10-Use-Models-and-Strategies-to-Add-Tens-and-Ones-28.30.png\" alt=\"Envision Math Common Core Grade 1 Answer Key Topic 10 Use Models and Strategies to Add Tens and Ones 28.30\" width=\"28\" height=\"31\" \/> 8 + 50 = 85<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-3793\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-Grade-1-Answer-Key-Topic-10-Use-Models-and-Strategies-to-Add-Tens-and-Ones-28.30.png\" alt=\"Envision Math Common Core Grade 1 Answer Key Topic 10 Use Models and Strategies to Add Tens and Ones 28.30\" width=\"28\" height=\"31\" \/> 50 + 8 = 13<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-3793\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-Grade-1-Answer-Key-Topic-10-Use-Models-and-Strategies-to-Add-Tens-and-Ones-28.30.png\" alt=\"Envision Math Common Core Grade 1 Answer Key Topic 10 Use Models and Strategies to Add Tens and Ones 28.30\" width=\"28\" height=\"31\" \/> 8 + 50 = 58<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-3793\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-Grade-1-Answer-Key-Topic-10-Use-Models-and-Strategies-to-Add-Tens-and-Ones-28.30.png\" alt=\"Envision Math Common Core Grade 1 Answer Key Topic 10 Use Models and Strategies to Add Tens and Ones 28.30\" width=\"28\" height=\"31\" \/> 50 + 8 = 58<\/p>\n<p>Answer:<br \/>\nOptions B and D are correct.<\/p>\n<p>Explanation:<br \/>\nIn the above-given question,<br \/>\ngiven that,<br \/>\n50 + 8 = 58.<br \/>\n8 + 50 = 58.<br \/>\nso options B and D are correct.<\/p>\n<h3>Lesson 10.4 Add Tens and Ones Using an Open Number LineName<\/h3>\n<p><strong>Solve &amp; Share<\/strong><\/p>\n<p>Use the open number lines to find the sums.<br \/>\n43 + 6 = ? 5+ 19 = ? 10+ 32 = ?<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-3795\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-Grade-1-Answer-Key-Topic-10-Use-Models-and-Strategies-to-Add-Tens-and-Ones-30.5.png\" alt=\"Envision Math Common Core Grade 1 Answer Key Topic 10 Use Models and Strategies to Add Tens and Ones 30.5\" width=\"540\" height=\"495\" \/><\/p>\n<p><strong>Visual Learning Bridge<\/strong><br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-3796\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-Grade-1-Answer-Key-Topic-10-Use-Models-and-Strategies-to-Add-Tens-and-Ones-30.6.png\" alt=\"Envision Math Common Core Grade 1 Answer Key Topic 10 Use Models and Strategies to Add Tens and Ones 30.6\" width=\"787\" height=\"232\" \/><\/p>\n<p><strong>Convince Me!<\/strong><br \/>\nThink about the problem 20 + 17. Would it be easier to start with 20 or 17 on the number line to solve the problem?<\/p>\n<p><strong>Guided Practice<\/strong><br \/>\nAdd using the number lines.<\/p>\n<p>Question 1.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-3797\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-Grade-1-Answer-Key-Topic-10-Use-Models-and-Strategies-to-Add-Tens-and-Ones-30.7.png\" alt=\"Envision Math Common Core Grade 1 Answer Key Topic 10 Use Models and Strategies to Add Tens and Ones 30.7\" width=\"494\" height=\"146\" \/><br \/>\nAnswer:<br \/>\n37 + 30 = 67.<\/p>\n<p>Explanation:<br \/>\nIn the above-given question,<br \/>\ngiven that,<br \/>\nadd the numbers.<br \/>\n37 + 30 = 67.<br \/>\n37 + 10 = 47.<br \/>\n47 + 10 = 57.<br \/>\n57 + 10 = 67.<\/p>\n<p>Question 2.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-3798\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-Grade-1-Answer-Key-Topic-10-Use-Models-and-Strategies-to-Add-Tens-and-Ones-30.8.png\" alt=\"Envision Math Common Core Grade 1 Answer Key Topic 10 Use Models and Strategies to Add Tens and Ones 30.8\" width=\"492\" height=\"99\" \/><\/p>\n<p>Answer:<br \/>\n26 + 50 = 76.<\/p>\n<p>Explanation:<br \/>\nIn the above-given question,<br \/>\ngiven that,<br \/>\nadd the numbers.<br \/>\n26 + 50 = 76.<br \/>\n26 + 10 = 36.<br \/>\n36 + 10 = 46.<br \/>\n46 + 10 = 56.<br \/>\n56 + 10 = 66.<br \/>\n66 + 10 = 76.<\/p>\n<p><img loading=\"lazy\" class=\"alignnone size-full wp-image-25748\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/07\/Envision-Math-Common-Core-1st-Grade-Answers-Key-Topic-10-Use-Models-and-Strategies-to-Add-Tens-and-Ones-16.png\" alt=\"\" width=\"432\" height=\"164\" \/><\/p>\n<p>Question 3.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-3799\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-Grade-1-Answer-Key-Topic-10-Use-Models-and-Strategies-to-Add-Tens-and-Ones-30.9.png\" alt=\"Envision Math Common Core Grade 1 Answer Key Topic 10 Use Models and Strategies to Add Tens and Ones 30.9\" width=\"302\" height=\"48\" \/><br \/>\n11 + 8 = ___<\/p>\n<p>Answer:<br \/>\n11 + 8 = 19.<\/p>\n<p>Explanation:<br \/>\nIn the above-given question,<br \/>\ngiven that,<br \/>\n11 + 8 = 19.<br \/>\n11 + 1 = 12.<br \/>\n12 + 1 = 13.<br \/>\n13 + 1 = 14.<br \/>\n14 + 1 = 15.<br \/>\n15 + 1 = 16.<br \/>\n16 + 1 = 17.<br \/>\n17 + 1 = 18.<br \/>\n18 + 1 = 19.<\/p>\n<p>Question 4.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-3815\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-1st-Grade-Answers-Topic-10-Use-Models-and-Strategies-to-Add-Tens-and-Ones-30.10.png\" alt=\"Envision Math Common Core 1st Grade Answers Topic 10 Use Models and Strategies to Add Tens and Ones 30.10\" width=\"303\" height=\"41\" \/><br \/>\n40 + 16 = ___<\/p>\n<p>Answer:<br \/>\n40 + 16 = 56.<\/p>\n<p>Explanation:<br \/>\nIn the above-given question,<br \/>\ngiven that,<br \/>\n40 + 16 = 56.<br \/>\n40 + 10 = 50.<br \/>\n50 + 1 = 51.<br \/>\n51 + 1 = 52.<br \/>\n52 + 1 = 53.<br \/>\n53 + 1 = 54.<br \/>\n54 + 1 = 55.<br \/>\n55 + 1 = 56.<\/p>\n<p>Question 5.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-3816\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-1st-Grade-Answers-Topic-10-Use-Models-and-Strategies-to-Add-Tens-and-Ones-30.11.png\" alt=\"Envision Math Common Core 1st Grade Answers Topic 10 Use Models and Strategies to Add Tens and Ones 30.11\" width=\"300\" height=\"58\" \/><br \/>\n48 + 20 = ___<\/p>\n<p>Answer:<br \/>\n48 + 20 = 68.<\/p>\n<p>Explanation:<br \/>\nIn the above-given question,<br \/>\ngiven that,<br \/>\n48 + 20 = 68.<br \/>\n48 + 10 = 58.<br \/>\n58 + 10 = 68.<br \/>\nso 48 + 20 = 68.<\/p>\n<p>Question 6.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-3817\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-1st-Grade-Answers-Topic-10-Use-Models-and-Strategies-to-Add-Tens-and-Ones-30.12.png\" alt=\"Envision Math Common Core 1st Grade Answers Topic 10 Use Models and Strategies to Add Tens and Ones 30.12\" width=\"295\" height=\"52\" \/><br \/>\n22 + 7 = ___<\/p>\n<p>Answer:<br \/>\n22 + 7 = 9.<\/p>\n<p>Explanation:<br \/>\nIn the above-given question,<br \/>\ngiven that,<br \/>\n22 + 7 = 29.<br \/>\n22 + 1 = 23.<br \/>\n23 + 1 = 24.<br \/>\n24 + 1 = 25.<br \/>\n25 + 1 = 26.<br \/>\n26 + 1 = 27.<br \/>\n27 + 1 = 28.<br \/>\n28 + 1 = 29.<\/p>\n<p>Question 7.<br \/>\n<strong>Higher Order Thinking<\/strong> Write an addition equation using a two-digit and one-digit number. Then solve by showing your work on the number line.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-3818\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-1st-Grade-Answers-Topic-10-Use-Models-and-Strategies-to-Add-Tens-and-Ones-30.13.png\" alt=\"Envision Math Common Core 1st Grade Answers Topic 10 Use Models and Strategies to Add Tens and Ones 30.13\" width=\"597\" height=\"87\" \/><\/p>\n<p>Answer:<br \/>\n10 + 10 = 20.<\/p>\n<p>Explanation:<br \/>\nIn the above-given question,<br \/>\ngiven that,<br \/>\n10 + 10 = 20.<br \/>\n1 + 1 = 2.<br \/>\n2 + 1 = 3.<br \/>\n3 + 1 = 4.<br \/>\n4 + 1 = 5.<br \/>\n5 + 1 = 6.<br \/>\n6 + 1 = 7.<br \/>\n7 + 1 = 8.<br \/>\n8 + 1 = 9.<br \/>\n9 + 1 = 10.<br \/>\n10 + 10 = 20.<\/p>\n<p><img loading=\"lazy\" class=\"alignnone size-full wp-image-25749\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/07\/Envision-Math-Common-Core-1st-Grade-Answers-Key-Topic-10-Use-Models-and-Strategies-to-Add-Tens-and-Ones-17.png\" alt=\"\" width=\"455\" height=\"136\" \/><\/p>\n<p><strong>Problem Solving<\/strong><\/p>\n<p>Solve the problems below.<\/p>\n<p>Question 8.<br \/>\n<strong>Use Tools<\/strong> Danny writes 20 pages of his paper on Monday. He writes 32 pages on Tuesday. How many pages did Danny write in all? Use the number line to solve.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-3819\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-1st-Grade-Answers-Topic-10-Use-Models-and-Strategies-to-Add-Tens-and-Ones-30.14.png\" alt=\"Envision Math Common Core 1st Grade Answers Topic 10 Use Models and Strategies to Add Tens and Ones 30.14\" width=\"301\" height=\"48\" \/><br \/>\n20 + 32 = ___ ___ pages<\/p>\n<p>Answer:<br \/>\nThe number of pages did Danny write in all = 52.<\/p>\n<p>Explanation:<br \/>\nIn the above-given question,<br \/>\ngiven that,<br \/>\nDanny writes 20 pages of his paper on Monday.<br \/>\nHe writes 32 pages on Tuesday.<br \/>\n20 + 32 = 52.<br \/>\nso the number of pages did Danny write in all = 52.<\/p>\n<p>Question 9.<br \/>\n<strong>Use Tools<\/strong> Last year, Leah watched 41 movies. This year, she has watched 30 movies. How many movies has Leah watched in all? Use the number line to solve.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-3820\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-1st-Grade-Answers-Topic-10-Use-Models-and-Strategies-to-Add-Tens-and-Ones-30.15.png\" alt=\"Envision Math Common Core 1st Grade Answers Topic 10 Use Models and Strategies to Add Tens and Ones 30.15\" width=\"294\" height=\"46\" \/><br \/>\n41 + 30 = ___ ___ movies.<\/p>\n<p>Answer:<br \/>\nThe number of movies has Leah watched in all = 71.<\/p>\n<p>Explanation:<br \/>\nIn the above-given question,<br \/>\ngiven that,<br \/>\nLast year, Leah watched 41 movies.<br \/>\nthis year, she has watched 30 movies.<br \/>\n41 + 30 = 71.<br \/>\nso the number of movies has Leah watched in all = 71.<\/p>\n<p>Question 10.<br \/>\n<strong>Higher Order Thinking<\/strong> Explain how you would solve 57 + 7 on a number line.<\/p>\n<p>Answer:<br \/>\n57 + 7 = 64.<\/p>\n<p>Explanation:<br \/>\nIn the above-given question,<br \/>\ngiven that,<br \/>\n57 + 7 = 64.<br \/>\n57 + 1 = 58.<br \/>\n58 + 1 = 59.<br \/>\n59 + 1 = 60.<br \/>\n60 + 1 = 61.<br \/>\n61 + 1 = 62.<br \/>\n62 + 1 = 63.<br \/>\n63 + 1 = 64.<\/p>\n<p>Question 11.<br \/>\n<strong>Assessment Practice<\/strong><br \/>\nAdd 60 + 26 on a number line. Show your work.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-3821\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-1st-Grade-Answers-Topic-10-Use-Models-and-Strategies-to-Add-Tens-and-Ones-30.16.png\" alt=\"Envision Math Common Core 1st Grade Answers Topic 10 Use Models and Strategies to Add Tens and Ones 30.16\" width=\"591\" height=\"47\" \/><br \/>\n60 + 26 = ___<\/p>\n<p>Answer:<br \/>\n60 + 26 = 86.<\/p>\n<p>Explanation:<br \/>\nIn the above-given question,<br \/>\ngiven that,<br \/>\n26 + 10 = 36.<br \/>\n36 + 10 = 46.<br \/>\n46 + 10 = 56.<br \/>\n56 + 10 = 66.<br \/>\n66 + 10 = 76.<br \/>\n76 + 10 = 86.<\/p>\n<h3>Lesson 10.5 Add Tens and Ones Using Models<\/h3>\n<p><strong>Solve &amp; Share<\/strong><\/p>\n<p>Maddy has 50 stickers. Jill gives Maddy 5 more stickers. Use place-value blocks to show how many stickers Maddy has now. Then use numbers and pictures to show your work.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-3822\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-1st-Grade-Answers-Topic-10-Use-Models-and-Strategies-to-Add-Tens-and-Ones-30.17.png\" alt=\"Envision Math Common Core 1st Grade Answers Topic 10 Use Models and Strategies to Add Tens and Ones 30.17\" width=\"649\" height=\"288\" \/><\/p>\n<p>Answer:<br \/>\nThe number of stickers Maddy has now = 60.<\/p>\n<p>Explanation:<br \/>\nIn the above-given question,<br \/>\ngiven that,<br \/>\nMaddy has 50 stickers.<br \/>\nJill gives Maddy 5 more stickers.<br \/>\n50 + 5 = 60.<br \/>\nso the number of stickers Maddy has now = 60.<\/p>\n<p><strong>Visual Learning Bridge<\/strong><br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-3823\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-1st-Grade-Answers-Topic-10-Use-Models-and-Strategies-to-Add-Tens-and-Ones-30.18.png\" alt=\"Envision Math Common Core 1st Grade Answers Topic 10 Use Models and Strategies to Add Tens and Ones 30.18\" width=\"775\" height=\"244\" \/><\/p>\n<p><strong>Convince Me!<\/strong><br \/>\nCould you count on by 10s to add 21 + 20?<\/p>\n<p>Answer:<br \/>\n21 + 20 = 41.<\/p>\n<p>Explanation:<br \/>\nIn the above-given question,<br \/>\ngiven that,<br \/>\n21 + 20 = 41.<br \/>\n21 + 10 = 31.<br \/>\n31 + 10 = 41.<\/p>\n<p><strong>Guided Practice<\/strong><br \/>\nUse blocks to add. Then draw what you did.<\/p>\n<p>Question 1.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-3824\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-1st-Grade-Answers-Topic-10-Use-Models-and-Strategies-to-Add-Tens-and-Ones-30.19.png\" alt=\"Envision Math Common Core 1st Grade Answers Topic 10 Use Models and Strategies to Add Tens and Ones 30.19\" width=\"155\" height=\"124\" \/><\/p>\n<p>Answer:<br \/>\n24 + 4 = 28.<\/p>\n<p>Explanation:<br \/>\nIn the above-given question,<br \/>\ngiven that,<br \/>\n24 + 4 = 28.<br \/>\n24 + 1 = 25.<br \/>\n25 + 1 = 26.<br \/>\n26 + 1 = 27.<br \/>\n27 + 1 = 28.<\/p>\n<p>Question 2.<br \/>\n16 + 30 = __<\/p>\n<p>Answer:<br \/>\n16 + 30 = 46.<\/p>\n<p>Explanation:<br \/>\nIn the above-given question,<br \/>\ngiven that,<br \/>\n16 + 30 = 46.<br \/>\n16 + 10 = 26.<br \/>\n26 + 10 = 36.<br \/>\n36 + 10 = 46.<\/p>\n<p>Question 3.<br \/>\n32 + 20 = ___<\/p>\n<p>Answer:<br \/>\n32 + 20 = 52.<\/p>\n<p>Explanation:<br \/>\nIn the above-given question,<br \/>\ngiven that,<br \/>\n32 + 20 = 52.<br \/>\n32 + 10 = 42.<br \/>\n42 + 10 = 52.<br \/>\n32 + 20 = 52.<\/p>\n<p>Question 4.<br \/>\n33 + 6 = ___<\/p>\n<p>Answer:<br \/>\n33 + 6 = 39.<\/p>\n<p>Explanation:<br \/>\nIn the above-given question,<br \/>\ngiven that,<br \/>\n33 + 6 = 39.<br \/>\n33 + 1 = 34.<br \/>\n34 + 1 = 35.<br \/>\n35 + 1 = 36.<br \/>\n36 + 1 = 37.<br \/>\n37 + 1 = 38.<br \/>\n38 + 1 = 39.<\/p>\n<p><strong>Independent Practice<\/strong><\/p>\n<p>Add. Draw blocks to show your work.<\/p>\n<p>Question 5.<br \/>\n37 + 2 = ___<\/p>\n<p>Answer:<br \/>\n37 + 2 = 39.<\/p>\n<p>Explanation:<br \/>\nIn the above-given question,<br \/>\ngiven that,<br \/>\n37 + 2 = 39.<br \/>\n37 + 1 = 38.<br \/>\n38 + 1 = 39.<br \/>\nso 37 + 2 = 39.<\/p>\n<p>Question 6.<br \/>\n21 + 40 = ___<\/p>\n<p>Answer:<br \/>\n21 + 40 = 61.<\/p>\n<p>Explanation:<br \/>\nIn the above-given question,<br \/>\ngiven that,<br \/>\n21 + 40 = 61.<br \/>\n21 + 10 = 31.<br \/>\n31 + 10 = 41.<br \/>\n41 + 10 = 51.<br \/>\n51 + 10 = 61.<\/p>\n<p>Question 7.<br \/>\n42 + 10 = ___<\/p>\n<p>Answer:<br \/>\n42 + 10 = 52.<\/p>\n<p>Explanation:<br \/>\nIn the above-given question,<br \/>\ngiven that,<br \/>\n42 + 10 = 52.<br \/>\n42 + 1 = 43.<br \/>\n43 + 1 = 44.<br \/>\n44 + 1 = 45.<br \/>\n45 + 1 = 46.<br \/>\n46 + 1 = 47.<br \/>\n47 + 1 = 48.<br \/>\n48 + 1 = 49.<br \/>\n49 + 1 = 50.<br \/>\n50 + 1 = 51.<br \/>\n51 + 1 = 52.<\/p>\n<p>Question 8.<br \/>\n4 + 33 = ___<\/p>\n<p>Answer:<br \/>\n4 + 33 = 37.<\/p>\n<p>Explanation:<br \/>\nIn the above-given question,<br \/>\ngiven that,<br \/>\n33 + 4 = 37.<br \/>\n33 + 1 = 34.<br \/>\n34 + 1 = 35.<br \/>\n35 + 1 = 36.<br \/>\n36 + 1 = 37.<\/p>\n<p>Question 9.<br \/>\n50 + 14 = ___<\/p>\n<p>Answer:<br \/>\n50 + 14 = 64.<\/p>\n<p>Explanation:<br \/>\nIn the above-given question,<br \/>\ngiven that,<br \/>\n14 + 50 = 64.<br \/>\n14 + 10 = 24.<br \/>\n24 + 10 = 34.<br \/>\n34 + 10 = 44.<br \/>\n44 + 10 = 54.<br \/>\n54 + 10 = 64.<\/p>\n<p><img loading=\"lazy\" class=\"alignnone size-full wp-image-3825\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-1st-Grade-Answers-Topic-10-Use-Models-and-Strategies-to-Add-Tens-and-Ones-30.20.png\" alt=\"Envision Math Common Core 1st Grade Answers Topic 10 Use Models and Strategies to Add Tens and Ones 30.20\" width=\"244\" height=\"196\" \/><\/p>\n<p><img loading=\"lazy\" class=\"alignnone size-full wp-image-3828\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-1st-Grade-Answers-Topic-10-Use-Models-and-Strategies-to-Add-Tens-and-Ones-30.200.png\" alt=\"Envision Math Common Core 1st Grade Answers Topic 10 Use Models and Strategies to Add Tens and Ones 30.200\" width=\"76\" height=\"91\" \/><br \/>\nLook for a pattern to help you find the missing numbers.<\/p>\n<p>Question 10.<br \/>\n<strong>Algebra<\/strong> Write the missing numbers. Then write the last addition problem in the pattern.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-3826\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-1st-Grade-Answers-Topic-10-Use-Models-and-Strategies-to-Add-Tens-and-Ones-30.21.png\" alt=\"Envision Math Common Core 1st Grade Answers Topic 10 Use Models and Strategies to Add Tens and Ones 30.21\" width=\"725\" height=\"162\" \/><\/p>\n<p>Answer:<br \/>\n40 + 5 = 45.<br \/>\n40 + 6 = 46.<br \/>\n40 + 7 = 47.<br \/>\n40 + 8 = 48.<br \/>\n40 + 9 = 49.<\/p>\n<p>Explanation:<br \/>\nIn the above-given question,<br \/>\ngiven that,<br \/>\n40 + 5 = 45.<br \/>\n45 + 1 = 46.<br \/>\n46 + 1 = 47.<br \/>\n47 + 1 = 48.<br \/>\n48 + 1 = 49.<\/p>\n<p><strong>Problem Solving<\/strong><\/p>\n<p>Write an equation to solve each problem below. Use blocks to help if needed.<\/p>\n<p>Question 11.<br \/>\n<strong>Model<\/strong> Jamal has 32 coins in his piggy bank. Jamal&#8217;s dad gives him 4 more coins. How many coins does Jamal have now?<br \/>\n___ + ___ = ___<br \/>\n__ coins<\/p>\n<p>Answer:<br \/>\nThe number of coins did Jamal has now = 36.<\/p>\n<p>Explanation:<br \/>\nIn the above-given question,<br \/>\ngiven that,<br \/>\nJamal has 32 coins in his piggy bank.<br \/>\nJamal&#8217;s dad gives him 4 more coins.<br \/>\n32 + 4 = 36.<br \/>\nso the number of coins did Jamal have now = 36.<\/p>\n<p>Question 12.<br \/>\n<strong>Model<\/strong> Julie sells 18 muffins on Monday. She sells 20 muffins on Friday. How many muffins did Julie sell in all?<br \/>\n___ + __ = ___<br \/>\n___ muffins<\/p>\n<p>Answer:<br \/>\nThe number of muffins did Julie sell in all = 38.<\/p>\n<p>Explanation:<br \/>\nIn the above-given question,<br \/>\ngiven that,<br \/>\nJulie sells 18 muffins on Monday.<br \/>\nShe sells 20 muffins on Friday.<br \/>\n18 + 20 = 38.<br \/>\nso the number of muffins did Julie sell in all = 38.<\/p>\n<p>Question 13.<br \/>\n<strong>Higher Order Thinking<\/strong> Jake has 9 marbles. He gets some more marbles. Now Jake has 79 marbles. How many marbles did Jake get? Draw a picture to solve.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-3827\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-1st-Grade-Answers-Topic-10-Use-Models-and-Strategies-to-Add-Tens-and-Ones-30.22.png\" alt=\"Envision Math Common Core 1st Grade Answers Topic 10 Use Models and Strategies to Add Tens and Ones 30.22\" width=\"333\" height=\"218\" \/><\/p>\n<p>Answer:<br \/>\nThe number of marbles did Jake get = 70.<\/p>\n<p>Explanation:<br \/>\nIn the above-given question,<br \/>\ngiven that,<br \/>\nJake has 9 marbles.<br \/>\nHe gets some more marbles.<br \/>\nNow Jake has 79 marbles.<br \/>\n79 &#8211; 9 = 70.<br \/>\nso the number of marbles did Jake get = 70.<\/p>\n<p>Question 14.<br \/>\n<strong>Assessment Practice<\/strong> Which is the sum for 40 + 37?<br \/>\nA 47<br \/>\nB 57<br \/>\nC 67<br \/>\nD 77<\/p>\n<p>Answer:<br \/>\nOption D is correct.<\/p>\n<p>Explanation:<br \/>\nIn the above-given question,<br \/>\ngiven that,<br \/>\n40 + 37 = 57.<br \/>\n37 + 10 = 47.<br \/>\n47 + 10 = 57.<br \/>\n57 + 10 = 67.<br \/>\n67 + 10 = 77.<br \/>\nso option D is correct.<\/p>\n<h3>Lesson 10.6 Make a Ten to Add<\/h3>\n<p><strong>Solve &amp; Share<\/strong><\/p>\n<p>What strategy can you use to find 8 + 5?<br \/>\nHow can you use the sum for 8 + 5 to help you find 28 + 5? Show your work and be ready to explain your thinking.<\/p>\n<p><img loading=\"lazy\" class=\"alignnone size-full wp-image-3829\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-1st-Grade-Answers-Topic-10-Use-Models-and-Strategies-to-Add-Tens-and-Ones-40.1.png\" alt=\"Envision Math Common Core 1st Grade Answers Topic 10 Use Models and Strategies to Add Tens and Ones 40.1\" width=\"704\" height=\"538\" \/><\/p>\n<p><strong>Visual Learning Bridge<\/strong><br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-3830\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-1st-Grade-Answers-Topic-10-Use-Models-and-Strategies-to-Add-Tens-and-Ones-40.2.png\" alt=\"Envision Math Common Core 1st Grade Answers Topic 10 Use Models and Strategies to Add Tens and Ones 40.2\" width=\"736\" height=\"233\" \/><\/p>\n<p><strong>Convince Me!<\/strong><br \/>\nWhen you add two numbers, how do you know if you can make a 10?<\/p>\n<p><strong>Guided Practice<\/strong><br \/>\nDraw blocks and make a 10 to add.<\/p>\n<p>Question 1.<br \/>\nFind 37 + 7.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-3831\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-1st-Grade-Answers-Topic-10-Use-Models-and-Strategies-to-Add-Tens-and-Ones-40.3.png\" alt=\"Envision Math Common Core 1st Grade Answers Topic 10 Use Models and Strategies to Add Tens and Ones 40.3\" width=\"446\" height=\"230\" \/><\/p>\n<p>Answer:<br \/>\n37 + 7 = 44.<\/p>\n<p>Explanation:<br \/>\nIn the above-given question,<br \/>\ngiven that,<br \/>\n37 + 3 = 40.<br \/>\n7 = 3 + 4.<br \/>\n40 + 4 = 44.<br \/>\n37 + 7 = 44.<\/p>\n<p><strong>Independent Practice<\/strong><\/p>\n<p>Draw blocks and make a 10 to add.<\/p>\n<p>Question 2.<br \/>\n17 + 7<br \/>\nThink: 17 + ___ = 20<br \/>\nSo, break apart 7 into ___ + ___.<br \/>\n20 + ___ = ___<br \/>\nSo, 17 + 7 = ___<\/p>\n<p>Answer:<br \/>\n17 + 7 = 24.<\/p>\n<p>Explanation:<br \/>\nIn the above-given question,<br \/>\ngiven that,<br \/>\n17 + 3 = 20.<br \/>\n7 = 3 + 4.<br \/>\n20 + 4 = 24.<br \/>\n17 + 7 = 24.<\/p>\n<p>Question 3.<br \/>\n38 +4<br \/>\nThink: 38 + ___ = 40<br \/>\nSo, break apart 4 into __ + ___<br \/>\n40 + ___ = ___<br \/>\nSo, 38 + 4 = __<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-3832\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-1st-Grade-Answers-Topic-10-Use-Models-and-Strategies-to-Add-Tens-and-Ones-50.1.png\" alt=\"Envision Math Common Core 1st Grade Answers Topic 10 Use Models and Strategies to Add Tens and Ones 50.1\" width=\"243\" height=\"231\" \/><\/p>\n<p>Answer:<br \/>\n38 + 4 = 42.<\/p>\n<p>Explanation:<br \/>\nIn the above-given question,<br \/>\ngiven that,<br \/>\n38 + 2 = 40.<br \/>\n4 = 2 + 2.<br \/>\n40 + 2 = 42.<br \/>\n38 + 4 = 42.<\/p>\n<p>Question 4.<br \/>\n42 + 8 = ___<\/p>\n<p>Answer:<br \/>\n42 + 8 = 50.<\/p>\n<p>Explanation:<br \/>\nIn the above-given question,<br \/>\ngiven that,<br \/>\n30 + 6 = 36.<br \/>\n6 = 3 + 3.<br \/>\n36 + 3 = 39.<br \/>\n39 + 11 = 50.<\/p>\n<p>Question 5.<br \/>\n29 +5 = ___<\/p>\n<p>Answer:<br \/>\n29 + 5 = 34.<\/p>\n<p>Explanation:<br \/>\nIn the above-given question,<br \/>\ngiven that,<br \/>\n25 + 4 = 29.<br \/>\n4 = 2 + 2.<br \/>\n29 + 2 = 31.<br \/>\n31 + 2 = 34.<\/p>\n<p><strong>Algebra<\/strong> Write each missing number. Use place-value blocks if you need to.<\/p>\n<p>Question 6.<br \/>\n23 + <img loading=\"lazy\" class=\"alignnone size-full wp-image-3833\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-1st-Grade-Answers-Topic-10-Use-Models-and-Strategies-to-Add-Tens-and-Ones-50.2.png\" alt=\"Envision Math Common Core 1st Grade Answers Topic 10 Use Models and Strategies to Add Tens and Ones 50.2\" width=\"44\" height=\"48\" \/> = 32<\/p>\n<p>Answer:<br \/>\nThe missing number is 9.<\/p>\n<p>Explanation:<br \/>\nIn the above-given question,<br \/>\ngiven that,<br \/>\n23 + x = 32.<br \/>\n32 &#8211; 23 = x.<br \/>\nx = 9.<br \/>\nso the missing number is 9.<\/p>\n<p>Question 7.<br \/>\n35 + <img loading=\"lazy\" class=\"alignnone size-full wp-image-3833\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-1st-Grade-Answers-Topic-10-Use-Models-and-Strategies-to-Add-Tens-and-Ones-50.2.png\" alt=\"Envision Math Common Core 1st Grade Answers Topic 10 Use Models and Strategies to Add Tens and Ones 50.2\" width=\"44\" height=\"48\" \/> = 40<\/p>\n<p>Answer:<br \/>\n35 + 5 = 40.<\/p>\n<p>Explanation:<br \/>\nIn the above-given question,<br \/>\ngiven that,<br \/>\n35 + x = 40.<br \/>\nx = 40 &#8211; 35.<br \/>\nx = 5.<br \/>\nso the missing number is 5.<\/p>\n<p><strong>Problem Solving<\/strong><\/p>\n<p>Solve each problem below.<\/p>\n<p>Question 8.<br \/>\n<strong>Model<\/strong> Jamie has 28 cards. His sister gives him 6 more cards. How many cards does Jamie have now? Draw blocks to show your work.<br \/>\n__ cards<\/p>\n<p>Answer:<br \/>\nThe number of cards does Jamie has now = 34.<\/p>\n<p>Explanation:<br \/>\nIn the above-given question,<br \/>\ngiven that,<br \/>\nJamie has 28 cards.<br \/>\nHis sister gives him 6 more cards.<br \/>\n28 + 6 = 34.<br \/>\nso the number of cards does Jamie has now = 34.<\/p>\n<p>Question 9.<br \/>\n<strong>Model<\/strong> Lisa knits 15 scarves. Then she knits 8 more. How many scarves does Lisa knit in all? Draw blocks to show your work.<br \/>\ncards<br \/>\n___ scarves<\/p>\n<p>Answer:<br \/>\nThe number of scarves does Lisa knit in all = 23.<\/p>\n<p>Explanation:<br \/>\nIn the above-given question,<br \/>\ngiven that,<br \/>\nLisa knits 15 scarves.<br \/>\nThen she knits 8 more.<br \/>\n15 + 8 = 23.<br \/>\nso the number of scarves does Lisa knit in all = 23.<\/p>\n<p>Question 10.<br \/>\n<strong>Higher Order Thinking<\/strong> Explain how to find 19 + 6. Use equations to show your thinking.<\/p>\n<p>Answer:<br \/>\n19 + 6 = 25.<\/p>\n<p>Explanation:<br \/>\nIn the above-given question,<br \/>\ngiven that,<br \/>\n19 + 1 = 20.<br \/>\n20 + 1 = 21.<br \/>\n21 + 1 = 22.<br \/>\n22 + 1 = 23.<br \/>\n23 + 1 = 24.<br \/>\n24 + 1 = 25.<\/p>\n<p>Question 11.<br \/>\n<strong>Assessment Practice<\/strong> Explain how to use the make a 10 strategy to find 37 + 5.<\/p>\n<p>Answer:<br \/>\n37 + 5 = 42.<\/p>\n<p>Explanation:<br \/>\nIn the above-given question,<br \/>\ngiven that,<br \/>\n37 + 1 = 38.<br \/>\n38 + 1 = 39.<br \/>\n39 + 1 = 40.<br \/>\n40 + 1 = 42.<\/p>\n<p>Lesson 10.7 Add Using Place Value<\/p>\n<p><strong>Solve &amp; Share<\/strong><\/p>\n<p>Grace is solving 35 + 8. First she adds 35 + 5 = 40. What should she do next to find the answer? Draw a model to explain.<\/p>\n<p><img loading=\"lazy\" class=\"alignnone size-full wp-image-3834\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-1st-Grade-Answers-Topic-10-Use-Models-and-Strategies-to-Add-Tens-and-Ones-60.2.png\" alt=\"Envision Math Common Core 1st Grade Answers Topic 10 Use Models and Strategies to Add Tens and Ones 60.2\" width=\"131\" height=\"347\" \/><\/p>\n<p><strong>Visual Learning Bridge<\/strong><br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-3835\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-1st-Grade-Answers-Topic-10-Use-Models-and-Strategies-to-Add-Tens-and-Ones-60.3.png\" alt=\"Envision Math Common Core 1st Grade Answers Topic 10 Use Models and Strategies to Add Tens and Ones 60.3\" width=\"727\" height=\"219\" \/><\/p>\n<p><strong>Convince Me!<\/strong><br \/>\nDo you need to make a 10 to add 23 + 15? How do you know?<\/p>\n<p><strong>Guided Practice<\/strong><br \/>\nAdd. Draw blocks to help.<\/p>\n<p>Question 1.<br \/>\nFind 36 + 24.<br \/>\n6 + 4 = <u>10<\/u><br \/>\n30 + 20 = ___<br \/>\nSo, 36 + 24 = ___<\/p>\n<p>Answer:<br \/>\n36 + 24 = 60.<\/p>\n<p>Explanation:<br \/>\nIn the above-given question,<br \/>\ngiven that,<br \/>\n6 + 4 = 10.<br \/>\n30 + 20 = 50.<br \/>\n36 + 24 = 60.<br \/>\n50 + 10 = 60.<\/p>\n<p>Question 2.<br \/>\nFind 19 + 25.<br \/>\n9 + 5 = <u>14<\/u><br \/>\n10 + 20 = <u>30<\/u><br \/>\nSo, 19 + 25 = ___<\/p>\n<p>Answer:<br \/>\n19 + 25 = 44.<\/p>\n<p>Explanation:<br \/>\nIn the above-given question,<br \/>\ngiven that,<br \/>\n9 + 5 = 14.<br \/>\n10 + 20 = 30.<br \/>\n30 + 14 = 44.<br \/>\n19 + 25 = 44.<\/p>\n<p><strong>Independent Practice<\/strong><\/p>\n<p>Add. Draw blocks or an open number line to help.\/<\/p>\n<p>Question 3.<br \/>\nFind 19 + 42.<br \/>\n9 + 2 = ___<br \/>\n10 + 40 = ___<br \/>\n19 + 42 = ___<\/p>\n<p>Answer:<br \/>\n19 + 42 = 61.<\/p>\n<p>Explanation:<br \/>\nIn the above-given question,<br \/>\ngiven that,<br \/>\n9 + 2 = 11.<br \/>\n10 + 40 = 50.<br \/>\n19 + 42 = 61.<br \/>\n50 + 11 = 61.<\/p>\n<p>Question 4.<br \/>\nFind 27 + 25.<br \/>\n7 + 5 = ___<br \/>\n20 + 20 = ___<br \/>\n27 + 25 = ___<\/p>\n<p>Answer:<br \/>\n27 + 25 = 32.<\/p>\n<p>Explanation:<br \/>\nIn the above-given question,<br \/>\ngiven that,<br \/>\n7 + 5 = 12.<br \/>\n20 + 20 = 40.<br \/>\n27 + 25 = 32.<\/p>\n<p>Add. You can draw blocks or an open number line to help.<\/p>\n<p>Question 5.<br \/>\n37 + 33 = ___<\/p>\n<p>Answer:<br \/>\n37 + 33 = 70.<\/p>\n<p>Explanation:<br \/>\nIn the above-given question,<br \/>\ngiven that,<br \/>\n7 + 3 = 10.<br \/>\n30 + 30 = 60.<br \/>\n60 + 10 = 70.<br \/>\n37 + 33 = 70.<\/p>\n<p>Question 6.<br \/>\n28 + 44 = ___<\/p>\n<p>Answer:<br \/>\n28 + 44 = 72.<\/p>\n<p>Explanation:<br \/>\nIn the above-given question,<br \/>\ngiven that,<br \/>\n8 + 4 = 12.<br \/>\n20 + 40 = 60.<br \/>\n60 + 12 = 72.<br \/>\n28 + 44 = 72.<\/p>\n<p>Question 7.<br \/>\n25 + 26 = ___<\/p>\n<p>Answer:<br \/>\n25 + 26 = 51.<\/p>\n<p>Explanation:<br \/>\nIn the above-given question,<br \/>\ngiven that,<br \/>\n5 + 6 = 11.<br \/>\n20 + 20 = 40.<br \/>\n40 + 11 = 51.<br \/>\n25 + 26 = 51.<\/p>\n<p>Question 8.<br \/>\n56 + 33 = ___<\/p>\n<p>Answer:<br \/>\n56 + 33 = 89.<\/p>\n<p>Explanation:<br \/>\nIn the above-given question,<br \/>\ngiven that,<br \/>\n6 + 3 = 9.<br \/>\n50 + 30 = 80.<br \/>\n80 + 9 = 89.<br \/>\n56 + 33 = 89.<\/p>\n<p><strong>Problem Solving<\/strong><\/p>\n<p>Solve. You can draw blocks or an open number line to help you.<\/p>\n<p>Question 9.<br \/>\n<strong>Reasoning<\/strong> Sara mows 15 lawns. Bill mows 12 lawns. How many lawns did they mow in all? Write an addition equation to show the problem.<br \/>\n__ lawns<\/p>\n<p>Answer:<br \/>\nThe number of lawns did they mow in all = 27.<\/p>\n<p>Explanation:<br \/>\nIn the above-given question,<br \/>\ngiven that,<br \/>\nSara mows 15 lawns.<br \/>\nBill mows 12 lawns.<br \/>\n15 + 12 = 27.<br \/>\nso the number of lawns did they mow in all = 27.<\/p>\n<p>Question 10.<br \/>\n<strong>Reasoning<\/strong> Jon reads 24 pages. Then he reads 27 more pages. How many pages does he read in all? Write an addition equation to show the problem.<br \/>\n___ pages<\/p>\n<p>Answer:<br \/>\nThe number of pages does he read in all = 51.<\/p>\n<p>Explanation:<br \/>\nIn the above-given question,<br \/>\ngiven that,<br \/>\nJon reads 24 pages.<br \/>\nThen he reads 27 more pages.<br \/>\n24 + 27 = 51.<br \/>\nso the number of pages does he read in all = 51.<\/p>\n<p>Question 11.<br \/>\n<strong>Higher Order Thinking<\/strong> Explain how to find 27 + 15 by adding the tens first. Use equations to show your thinking.<\/p>\n<p>Answer:<br \/>\n27 + 15 = 42.<\/p>\n<p>Explanation:<br \/>\nIn the above-given question,<br \/>\ngiven that,<br \/>\n27 + 15 = 42.<br \/>\n7 + 5 = 12.<br \/>\n20 + 10 = 30.<br \/>\n30 + 12 = 42.<\/p>\n<p>Question 12.<br \/>\n<strong>Assessment Practice<\/strong> For which addition equations can you make a 10 to add? Choose two that apply.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-3836\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-1st-Grade-Answers-Topic-10-Use-Models-and-Strategies-to-Add-Tens-and-Ones-60.8.png\" alt=\"Envision Math Common Core 1st Grade Answers Topic 10 Use Models and Strategies to Add Tens and Ones 60.8\" width=\"27\" height=\"26\" \/> 12 + 29 = <u>?<\/u><br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-3836\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-1st-Grade-Answers-Topic-10-Use-Models-and-Strategies-to-Add-Tens-and-Ones-60.8.png\" alt=\"Envision Math Common Core 1st Grade Answers Topic 10 Use Models and Strategies to Add Tens and Ones 60.8\" width=\"27\" height=\"26\" \/> 61 +26 = <u>?<\/u><br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-3836\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-1st-Grade-Answers-Topic-10-Use-Models-and-Strategies-to-Add-Tens-and-Ones-60.8.png\" alt=\"Envision Math Common Core 1st Grade Answers Topic 10 Use Models and Strategies to Add Tens and Ones 60.8\" width=\"27\" height=\"26\" \/> 33 + 35 = <u>?<\/u><br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-3836\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-1st-Grade-Answers-Topic-10-Use-Models-and-Strategies-to-Add-Tens-and-Ones-60.8.png\" alt=\"Envision Math Common Core 1st Grade Answers Topic 10 Use Models and Strategies to Add Tens and Ones 60.8\" width=\"27\" height=\"26\" \/> 34 + 18 = <u>?<\/u><\/p>\n<p>Answer:<br \/>\nOption A is correct.<\/p>\n<p>Explanation:<br \/>\nIn the above-given question,<br \/>\ngiven that,<br \/>\n12 + 29 = 41.<br \/>\n9 + 2 = 11.<br \/>\n10 + 20 = 30.<br \/>\n30 + 11 = 41.<\/p>\n<h3>Lesson 10.8 Practice Adding Using Strategies<\/h3>\n<p><strong>Solve &amp; Share<\/strong><\/p>\n<p>A puzzle has 59 green pieces and 25 orange pieces. Solve 59 + 25 to find how many pieces in all. Use any of the strategies you have learned.<\/p>\n<p><img loading=\"lazy\" class=\"alignnone size-full wp-image-3837\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-1st-Grade-Answers-Topic-10-Use-Models-and-Strategies-to-Add-Tens-and-Ones-60.10.png\" alt=\"Envision Math Common Core 1st Grade Answers Topic 10 Use Models and Strategies to Add Tens and Ones 60.10\" width=\"536\" height=\"527\" \/><\/p>\n<p>Answer:<br \/>\n59 + 25 = 84.<\/p>\n<p>Explanation:<br \/>\nIn the above-given question,<br \/>\ngiven that,<br \/>\n9 + 5 = 14.<br \/>\n50 + 20 = 70.<br \/>\n70 + 14 = 84.<\/p>\n<p><img loading=\"lazy\" class=\"alignnone size-full wp-image-25750\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/07\/Envision-Math-Common-Core-1st-Grade-Answers-Key-Topic-10-Use-Models-and-Strategies-to-Add-Tens-and-Ones-18.png\" alt=\"\" width=\"484\" height=\"413\" \/><\/p>\n<p><strong>Visual Learning Bridge<\/strong><br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-3838\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-1st-Grade-Answers-Topic-10-Use-Models-and-Strategies-to-Add-Tens-and-Ones-60.11.png\" alt=\"Envision Math Common Core 1st Grade Answers Topic 10 Use Models and Strategies to Add Tens and Ones 60.11\" width=\"736\" height=\"215\" \/><\/p>\n<p><strong>Convince Me!<\/strong><br \/>\nWhy can you use different strategies to solve the same problem?<\/p>\n<p><strong>Guided Practice<\/strong><\/p>\n<p>Find each sum. Solve any way you choose. Draw or explain what you did.<\/p>\n<p>Question 1.<br \/>\n37 + 24 = <u>61<\/u><br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-3839\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-1st-Grade-Answers-Topic-10-Use-Models-and-Strategies-to-Add-Tens-and-Ones-60.12.png\" alt=\"Envision Math Common Core 1st Grade Answers Topic 10 Use Models and Strategies to Add Tens and Ones 60.12\" width=\"194\" height=\"206\" \/><\/p>\n<p>Answer:<br \/>\n37 + 24 = 61.<\/p>\n<p>Explanation:<br \/>\nIn the above-given question,<br \/>\ngiven that,<br \/>\n37 + 24 = 61.<br \/>\n7 + 4 = 11.<br \/>\n30 + 20 = 50.<br \/>\n50 + 11 = 61.<br \/>\nso 37 + 24 = 61.<\/p>\n<p>Question 2.<br \/>\n48 + 10 = ___<\/p>\n<p>Answer:<br \/>\n48 + 10 = 58.<\/p>\n<p>Explanation:<br \/>\nIn the above-given question,<br \/>\ngiven that,<br \/>\n48 + 10 = 58.<br \/>\n8 + 0 = 8.<br \/>\n40 + 10 = 50.<br \/>\n50 + 8 = 58.<\/p>\n<p><strong>Independent Practice<\/strong><\/p>\n<p>Find each sum. Solve any way you choose. Draw or explain what you did.<\/p>\n<p>Question 3.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-3840\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-1st-Grade-Answers-Topic-10-Use-Models-and-Strategies-to-Add-Tens-and-Ones-60.13.png\" alt=\"Envision Math Common Core 1st Grade Answers Topic 10 Use Models and Strategies to Add Tens and Ones 60.13\" width=\"312\" height=\"223\" \/><\/p>\n<p>Answer:<br \/>\n27 + 9 = 36.<\/p>\n<p>Explanation:<br \/>\nIn the above-given question,<br \/>\ngiven that,<br \/>\n9 + 7 = 16.<br \/>\n20 + 0 = 20.<br \/>\n20 + 16 = 36.<\/p>\n<p>Question 4.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-3841\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-1st-Grade-Answers-Topic-10-Use-Models-and-Strategies-to-Add-Tens-and-Ones-60.14.png\" alt=\"Envision Math Common Core 1st Grade Answers Topic 10 Use Models and Strategies to Add Tens and Ones 60.14\" width=\"313\" height=\"226\" \/><\/p>\n<p>Answer:<br \/>\n50 + 23 = 73.<\/p>\n<p>Explanation:<br \/>\nIn the above-given question,<br \/>\ngiven that,<br \/>\n0 + 3 = 3.<br \/>\n50 + 20 = 70.<br \/>\n70 + 3 = 73.<\/p>\n<p><img loading=\"lazy\" class=\"alignnone size-full wp-image-25752\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/07\/Envision-Math-Common-Core-1st-Grade-Answers-Key-Topic-10-Use-Models-and-Strategies-to-Add-Tens-and-Ones-19-1.png\" alt=\"\" width=\"270\" height=\"223\" \/><\/p>\n<p>Question 5.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-3842\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-1st-Grade-Answers-Topic-10-Use-Models-and-Strategies-to-Add-Tens-and-Ones-60.15.png\" alt=\"Envision Math Common Core 1st Grade Answers Topic 10 Use Models and Strategies to Add Tens and Ones 60.15\" width=\"313\" height=\"226\" \/><\/p>\n<p>Answer:<br \/>\n32 + 28 = 60.<\/p>\n<p>Explanation:<br \/>\nIn the above-given question,<br \/>\ngiven that,<br \/>\n32 + 28 = 60.<br \/>\n8 + 2 = 10.<br \/>\n30 + 20 = 50.<br \/>\n50 + 10 = 60.<br \/>\n32 + 28 = 60.<\/p>\n<p><img loading=\"lazy\" class=\"alignnone size-full wp-image-25753\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/07\/Envision-Math-Common-Core-1st-Grade-Answers-Key-Topic-10-Use-Models-and-Strategies-to-Add-Tens-and-Ones-20.png\" alt=\"\" width=\"255\" height=\"217\" \/><\/p>\n<p>Question 6.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-3843\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-1st-Grade-Answers-Topic-10-Use-Models-and-Strategies-to-Add-Tens-and-Ones-60.16.png\" alt=\"Envision Math Common Core 1st Grade Answers Topic 10 Use Models and Strategies to Add Tens and Ones 60.16\" width=\"316\" height=\"223\" \/><\/p>\n<p>Answer:<br \/>\n62 + 19 = 81.<\/p>\n<p>Explanation:<br \/>\nIn the above-given question,<br \/>\ngiven that,<br \/>\n62 + 19 = 81.<br \/>\n60 + 10 = 70.<br \/>\n2 + 9 = 11.<br \/>\n70 + 11 = 81.<br \/>\n62 + 19 = 81.<\/p>\n<p><img loading=\"lazy\" class=\"alignnone size-full wp-image-25755\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/07\/Envision-Math-Common-Core-1st-Grade-Answers-Key-Topic-10-Use-Models-and-Strategies-to-Add-Tens-and-Ones-21.png\" alt=\"\" width=\"241\" height=\"188\" \/><\/p>\n<p><strong>Problem Solving<\/strong><\/p>\n<p>Find each sum. Solve any way you choose.<\/p>\n<p>Question 7.<br \/>\n<strong>Reasoning<\/strong> Lilly makes necklaces. She has 43 blue beads. She has 20 pink beads. How many beads does Lilly have in all?<br \/>\n___ beads<\/p>\n<p>Answer:<br \/>\nThe number of beads does Lilly has in all = 63.<\/p>\n<p>Explanation:<br \/>\nIn the above-given question,<br \/>\ngiven that,<br \/>\nLilly makes necklaces.<br \/>\nShe has 43 blue beads.<br \/>\nshe has 20 pink beads.<br \/>\n43 + 20 = 63.<br \/>\nso\u00a0 the number of beads does Lilly have in all = 63.<\/p>\n<p>Question 8.<br \/>\n<strong>Reasoning<\/strong> Jay has a hat collection. He has 27 hats from football teams. He has 33 hats from baseball teams. How many hats does Jay have in all?<br \/>\n___ hats<\/p>\n<p>Answer:<br \/>\nThe number of hats does Jay has in all = 60.<\/p>\n<p>Explanation:<br \/>\nIn the above-given question,<br \/>\ngiven that,<br \/>\nJay has a hat collection.<br \/>\nHe has 27 hats from football teams.<br \/>\nHe has 33 hats from baseball teams.<br \/>\n27 + 33 = 60.<br \/>\nso the number of hats does Jay has in all = 60.<\/p>\n<p>Question 9.<br \/>\n<strong>Higher Order Thinking<\/strong> Connie&#8217;s soccer team has a bake sale. The team sells 18 banana muffins and 24 oat muffins. They sell 12 granola bars. How many muffins did Connie&#8217;s team sell? Draw a picture and write an equation to show your work.<br \/>\n___ muffins<\/p>\n<p>Answer:<br \/>\nThe number of muffins did Connie&#8217;s team sell = 54 muffins.<\/p>\n<p>Explanation:<br \/>\nIn the above-given question,<br \/>\ngiven that,<br \/>\nConnie&#8217;s soccer team has a bake sale.<br \/>\nThe team sells 18 banana muffins and 24 oat muffins.<br \/>\nThey sell 12 granola bars.<br \/>\n18 + 24 + 12.<br \/>\n18 + 24 = 42.<br \/>\n42 + 12 = 54.<br \/>\nso the number of muffins did Connie&#8217;s team sell = 54 muffins.<\/p>\n<p>Question 10.<br \/>\n<strong>Assessment Practice<\/strong> Garret uses place-value blocks to show 53 + 18. Which of the following model this problem? Choose two that apply.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-3844\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-1st-Grade-Answers-Topic-10-Use-Models-and-Strategies-to-Add-Tens-and-Ones-70.1.png\" alt=\"Envision Math Common Core 1st Grade Answers Topic 10 Use Models and Strategies to Add Tens and Ones 70.1\" width=\"674\" height=\"69\" \/><\/p>\n<p>Answer:<br \/>\nOption B is correct.<\/p>\n<p>Explanation:<br \/>\nIn the above-given question,<br \/>\ngiven that,<br \/>\n53 + 18 = 71.<br \/>\n3 + 8 = 11.<br \/>\n50 + 10 = 60.<br \/>\n60 + 11 = 71.<br \/>\nso option B is correct.<\/p>\n<h3>Lesson 10.9 Model with Math<\/h3>\n<p><strong>Solve &amp; Share<\/strong><br \/>\nPam has 13 buttons. Julie gives her some more. Now Pam as 30 buttons. Use blocks or a number line to figure out how many buttons Julie gave Pam.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-3845\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-1st-Grade-Answers-Topic-10-Use-Models-and-Strategies-to-Add-Tens-and-Ones-70.2.png\" alt=\"Envision Math Common Core 1st Grade Answers Topic 10 Use Models and Strategies to Add Tens and Ones 70.2\" width=\"189\" height=\"374\" \/><\/p>\n<p><strong>Thinking Habits<\/strong><br \/>\nHow can I use numbers and symbols to solve this problem? How can I use the math I know to show this problem?<\/p>\n<p><strong>Visual Learning Bridge<\/strong><br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-3800\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-1st-Grade-Answer-Key-Topic-10-Use-Models-and-Strategies-to-Add-Tens-and-Ones-70.3.png\" alt=\"Envision Math Common Core 1st Grade Answer Key Topic 10 Use Models and Strategies to Add Tens and Ones 70.3\" width=\"777\" height=\"241\" \/><\/p>\n<p><strong>Convince Me!<\/strong><br \/>\nIf Miko has 23 green marbles and 30 blue marbles, how many marbles does he have in all? Draw a picture to solve the problem.<\/p>\n<p><strong>Guided Practice<\/strong><br \/>\nUse drawings to show and solve the problem. Then write the equation.<\/p>\n<p>Question 1.<br \/>\nEllen has 27 stickers. Her brother gives her 26 stickers. How many stickers does Ellen have in all?<br \/>\n___ + ___= ___<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-3846\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-1st-Grade-Answers-Topic-10-Use-Models-and-Strategies-to-Add-Tens-and-Ones-70.4.png\" alt=\"Envision Math Common Core 1st Grade Answers Topic 10 Use Models and Strategies to Add Tens and Ones 70.4\" width=\"192\" height=\"194\" \/><br \/>\nAnswer:<br \/>\n27 + 26 = 53.<\/p>\n<p>Explanation:<br \/>\nIn the above-given question,<br \/>\ngiven that,<br \/>\nEllen has 27 stickers.<br \/>\nHer brother gives her 26 stickers.<br \/>\n27 + 26 = 53.<\/p>\n<p><strong>Independent Practice<\/strong><\/p>\n<p>Use drawings to show and solve the problem. Then write the equation.<\/p>\n<p>Question 2.<br \/>\nBarry has 12 red cars. He has 14 blue cars. How many cars does Barry have in all?<br \/>\n___ + ___ = ___ cars<\/p>\n<p>Answer:<br \/>\nThe number of cars does Barry have in all = 26.<\/p>\n<p>Explanation:<br \/>\nIn the above-given question,<br \/>\ngiven that,<br \/>\nBarry has 12 red cars.<br \/>\nHe has 14 blue cars.<br \/>\n12 + 14 = 26.<br \/>\nso the number of cars does Barry have in all = 26.<\/p>\n<p>Question 3.<br \/>\nAmy picks 18 roses. Roger picks 36 tulips. How many flowers do Amy and Roger pick in all?<br \/>\n___ + ___ = ___ flowers<\/p>\n<p>Answer:<br \/>\nThe number of flowers do Amy and Roger pick in all = 54.<\/p>\n<p>Explanation:<br \/>\nIn the above-given question,<br \/>\ngiven that,<br \/>\nAmy picks 18 roses.<br \/>\nRoger picks 36 tulips.<br \/>\n18 + 36 = 54.<br \/>\nso the number of flowers do Amy and Roger pick in all = 54.<\/p>\n<p>Question 4.<br \/>\nThere are 16 apples in the bowl. George buys 15 more apples. How many apples are there in all?<br \/>\n__ + ___ = __ apples<\/p>\n<p>Answer:<br \/>\nThe number of apples is there in all = 31.<\/p>\n<p>Explanation:<br \/>\nIn the above-given question,<br \/>\ngiven that,<br \/>\nThere are 16 apples in the bowl.<br \/>\nGeorge buys 15 more apples.<br \/>\n16 + 15 = 31.<br \/>\nso the number of apples are there in all = 31.<\/p>\n<p><strong>Problem Solving<\/strong><\/p>\n<p><strong>Performance Task<\/strong><\/p>\n<p><strong>Stamp Collection<\/strong><br \/>\nManuel, Matt, and Jessica each have their own stamp collection.<\/p>\n<p>Question 5.<br \/>\n<strong>Model<\/strong> Manuel has 18 stamps. Matt gives Manuel 30 stamps. Now, how many stamps does Manuel have in all? Draw a picture to show the problem.<\/p>\n<p>Answer:<br \/>\nThe number of stamps does Manuel has in all = 48.<\/p>\n<p>Explanation:<br \/>\nIn the above-given question,<br \/>\ngiven that,<br \/>\nManuel has 18 stamps.<br \/>\nMatt gives Manuel 30 stamps.<br \/>\n18 + 30 = 48.<br \/>\nso the number of stamps does Manuel has in all = 48.<\/p>\n<p>Question 6.<br \/>\n<strong>Model<\/strong> Write an equation that matches the story.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-3847\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-1st-Grade-Answers-Topic-10-Use-Models-and-Strategies-to-Add-Tens-and-Ones-77.1.png\" alt=\"Envision Math Common Core 1st Grade Answers Topic 10 Use Models and Strategies to Add Tens and Ones 77.1\" width=\"239\" height=\"41\" \/><br \/>\nAnswer:<br \/>\nThe number of stamps does Manuel has in all = 48.<\/p>\n<p>Explanation:<br \/>\nIn the above-given question,<br \/>\ngiven that,<br \/>\nManuel has 18 stamps.<br \/>\nMatt gives Manuel 30 stamps.<br \/>\n18 + 30 = 48.<br \/>\nso the number of stamps does Manuel has in all = 48.<\/p>\n<p>Question 7.<br \/>\n<strong>Explain<\/strong> Matt has 24 red stamps. He asks Jessica for enough red stamps to make 50 red stamps. Jessica gives him 25 red stamps. Did Jessica give Matt enough red stamps? Explain how you know using words or pictures.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-3848\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-1st-Grade-Answers-Topic-10-Use-Models-and-Strategies-to-Add-Tens-and-Ones-77.2.png\" alt=\"Envision Math Common Core 1st Grade Answers Topic 10 Use Models and Strategies to Add Tens and Ones 77.2\" width=\"328\" height=\"190\" \/><br \/>\nCan you make a 10? Why or why not.<\/p>\n<p>Answer:<br \/>\nJessica did not give Matt enough red stamps.<\/p>\n<p>Explanation:<br \/>\nIn the above-given question,<br \/>\ngiven that,<br \/>\nMatt has 24 red stamps.<br \/>\nHe asks Jessica for enough red stamps to make 50 red stamps.<br \/>\nJessica gives him 25 red stamps.<br \/>\n24 + 26 = 50.<br \/>\nno, Jessica did not give Matt enough red stamps.<\/p>\n<h3>Topic 10 Fluency Practice<\/h3>\n<p>Color these sums and differences. Leave the rest white.<\/p>\n<p><img loading=\"lazy\" class=\"alignnone size-full wp-image-3849\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-1st-Grade-Answers-Topic-10-Use-Models-and-Strategies-to-Add-Tens-and-Ones-77.5.png\" alt=\"Envision Math Common Core 1st Grade Answers Topic 10 Use Models and Strategies to Add Tens and Ones 77.5\" width=\"694\" height=\"537\" \/><\/p>\n<p><strong>Topic 10 Vocabulary Review<\/strong><\/p>\n<p><strong>Understand Vocabulary<\/strong><\/p>\n<p>Question 1.<br \/>\nUse the models to add the tens.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-3850\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-1st-Grade-Answers-Topic-10-Use-Models-and-Strategies-to-Add-Tens-and-Ones-77.6.png\" alt=\"Envision Math Common Core 1st Grade Answers Topic 10 Use Models and Strategies to Add Tens and Ones 77.6\" width=\"150\" height=\"76\" \/><br \/>\n___ tens + ___ tens = ___ tens<\/p>\n<p>Answer:<br \/>\n3 tens + 2 tens = 50.<\/p>\n<p>Explanation:<br \/>\nIn the above-given question,<br \/>\ngiven that,<br \/>\n3 tens = 30.<br \/>\n2 tens = 20.<br \/>\n30 + 20 = 50.<\/p>\n<p>Question 2.<br \/>\nUse the models to add the tens.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-3851\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-1st-Grade-Answers-Topic-10-Use-Models-and-Strategies-to-Add-Tens-and-Ones-77.7.png\" alt=\"Envision Math Common Core 1st Grade Answers Topic 10 Use Models and Strategies to Add Tens and Ones 77.7\" width=\"144\" height=\"64\" \/><br \/>\n___ tens + ___ tens = ___ tens<\/p>\n<p>Answer:<br \/>\n2 tens + 4 tens = 6 tens.<\/p>\n<p>Explanation:<br \/>\nIn the above-given question,<br \/>\ngiven that,<br \/>\n2 tens + 4 tens.<br \/>\n2 tens = 20.<br \/>\n4 tens = 40.<br \/>\n20 + 40 = 60.<\/p>\n<p>Question 3.<br \/>\nFind 19 + 12.<br \/>\nAdd the ones. 9 + 2 = ___<br \/>\nThen add the tens. 10 + 10 = ___<br \/>\nDraw blocks to help. 19 + 12 = ___<\/p>\n<p>Answer:<br \/>\n19 + 12 = 31.<\/p>\n<p>Explanation:<br \/>\nIn the above-given question,<br \/>\ngiven that,<br \/>\n9 + 2 = 11.<br \/>\n10 + 10 = 20.<br \/>\n19 + 12 = 31.<\/p>\n<p><strong>Use Vocabulary in Writing<\/strong><\/p>\n<p>Question 4.<br \/>\nSolve 20 + 6 using an open number line. Explain how you solved it using terms from the Word List.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-3852\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-1st-Grade-Answers-Topic-10-Use-Models-and-Strategies-to-Add-Tens-and-Ones-77.9.png\" alt=\"Envision Math Common Core 1st Grade Answers Topic 10 Use Models and Strategies to Add Tens and Ones 77.9\" width=\"466\" height=\"192\" \/><\/p>\n<p>Answer:<br \/>\n20 + 6 = 26.<\/p>\n<p>Explanation:<br \/>\nIn the above-given question,<br \/>\ngiven that,<br \/>\n20 + 1 = 21.<br \/>\n21 + 1 = 22.<br \/>\n22 + 1 = 23.<br \/>\n23 + 1 = 24.<br \/>\n24 + 1 = 25.<br \/>\n25 + 1 = 26.<\/p>\n<h3>Topic 10 Reteaching<\/h3>\n<p><strong>Set A<\/strong><\/p>\n<p>You can add groups of 10.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-3853\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-1st-Grade-Answers-Topic-10-Use-Models-and-Strategies-to-Add-Tens-and-Ones-77.10.png\" alt=\"Envision Math Common Core 1st Grade Answers Topic 10 Use Models and Strategies to Add Tens and Ones 77.10\" width=\"338\" height=\"191\" \/><\/p>\n<p>Write the numbers to complete each equation.<\/p>\n<p>Question 1.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-3854\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-1st-Grade-Answers-Topic-10-Use-Models-and-Strategies-to-Add-Tens-and-Ones-77.11.png\" alt=\"Envision Math Common Core 1st Grade Answers Topic 10 Use Models and Strategies to Add Tens and Ones 77.11\" width=\"226\" height=\"130\" \/><\/p>\n<p>Answer:<br \/>\n4 tens + 1 ten = 5 tens.<\/p>\n<p>Explanation:<br \/>\nIn the above-given question,<br \/>\ngiven that,<br \/>\n4 tens + 1 ten = 5 tens.<br \/>\n4 tens = 40.<br \/>\n1 tens = 10.<br \/>\n40 + 10 = 50.<\/p>\n<p><img loading=\"lazy\" class=\"alignnone size-full wp-image-25756\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/07\/Envision-Math-Common-Core-1st-Grade-Answers-Key-Topic-10-Use-Models-and-Strategies-to-Add-Tens-and-Ones-22.png\" alt=\"\" width=\"197\" height=\"129\" \/><\/p>\n<p>Question 2.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-3855\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-1st-Grade-Answers-Topic-10-Use-Models-and-Strategies-to-Add-Tens-and-Ones-77.12.png\" alt=\"Envision Math Common Core 1st Grade Answers Topic 10 Use Models and Strategies to Add Tens and Ones 77.12\" width=\"219\" height=\"126\" \/><\/p>\n<p>Answer:<br \/>\n3 tens + 3 ten = 6 tens.<\/p>\n<p>Explanation:<br \/>\nIn the above-given question,<br \/>\ngiven that,<br \/>\n3 tens + 3 tens = 6 tens.<br \/>\n3 tens = 30.<br \/>\n3 tens = 30.<br \/>\n30 + 30 = 60.<\/p>\n<p><img loading=\"lazy\" class=\"alignnone size-full wp-image-25757\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/07\/Envision-Math-Common-Core-1st-Grade-Answers-Key-Topic-10-Use-Models-and-Strategies-to-Add-Tens-and-Ones-23.png\" alt=\"\" width=\"199\" height=\"129\" \/><\/p>\n<p><strong>Set B<\/strong><\/p>\n<p>You can also use mental math to add 10. When you add 10, the tens digit goes up by 1. The ones digit stays the same.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-3856\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-1st-Grade-Answers-Topic-10-Use-Models-and-Strategies-to-Add-Tens-and-Ones-77.13.png\" alt=\"Envision Math Common Core 1st Grade Answers Topic 10 Use Models and Strategies to Add Tens and Ones 77.13\" width=\"222\" height=\"144\" \/><\/p>\n<p>Answer:<br \/>\n2 tens + 1 ten = 3 tens.<br \/>\n3 tens + 4 ones = 34.<\/p>\n<p>Explanation:<br \/>\nIn the above-given question,<br \/>\ngiven that,<br \/>\n2 tens + 1 ten = 3 tens.<br \/>\n3 tens = 30.<br \/>\n4 ones = 4.<br \/>\n30 + 4 = 34.<\/p>\n<p>Use mental math to solve the problems below.<\/p>\n<p>Question 3.<br \/>\n36 + 10 = ___<\/p>\n<p>Answer:<br \/>\n36 + 10 = 46.<\/p>\n<p>Explanation:<br \/>\nIn the above-given question,<br \/>\ngiven that,<br \/>\n6 + 0 = 6.<br \/>\n30 + 10 = 40.<br \/>\n40 + 6 = 46.<\/p>\n<p>Question 4.<br \/>\n53 + 10 = ___<\/p>\n<p>Answer:<br \/>\n53 + 10 = 63.<\/p>\n<p>Explanation:<br \/>\nIn the above-given question,<br \/>\ngiven that,<br \/>\n3 + 0 = 3.<br \/>\n50 + 10 = 60.<br \/>\n60 + 3 = 63.<br \/>\nso 53 + 10 = 63.<\/p>\n<p>Question 5.<br \/>\n71 + 10 = ___<\/p>\n<p>Answer:<br \/>\n71 + 10 = 81.<\/p>\n<p>Explanation:<br \/>\nIn the above-given question,<br \/>\ngiven that,<br \/>\n1 + 0 = 1.<br \/>\n70 + 10 = 80.<br \/>\n80 + 1 = 81.<br \/>\nso 71 + 10 = 81.<\/p>\n<p><strong>Set C<\/strong><\/p>\n<p>You can use part of a hundred chart to add tens and ones.<br \/>\n3+ 40 = ?<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-3857\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-1st-Grade-Answers-Topic-10-Use-Models-and-Strategies-to-Add-Tens-and-Ones-80.1.png\" alt=\"Envision Math Common Core 1st Grade Answers Topic 10 Use Models and Strategies to Add Tens and Ones 80.1\" width=\"316\" height=\"178\" \/><\/p>\n<p>Use the part of the hundred chart to add tens and ones.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-3858\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-1st-Grade-Answers-Topic-10-Use-Models-and-Strategies-to-Add-Tens-and-Ones-80.2.png\" alt=\"Envision Math Common Core 1st Grade Answers Topic 10 Use Models and Strategies to Add Tens and Ones 80.2\" width=\"317\" height=\"160\" \/><\/p>\n<p>Question 6.<br \/>\n4 + 50 = ___<\/p>\n<p>Answer:<br \/>\n4 + 50 = 54.<\/p>\n<p>Explanation:<br \/>\nIn the above-given question,<br \/>\ngiven that,<br \/>\n4 + 0 = 4.<br \/>\n50 + 0 = 50.<br \/>\n50 + 4 = 54.<\/p>\n<p>Question 7.<br \/>\n8 + 30 = ___<\/p>\n<p>Answer:<br \/>\n8 + 30 = 38.<\/p>\n<p>Explanation:<br \/>\nIn the above-given question,<br \/>\ngiven that,<br \/>\n8 + 0 = 8.<br \/>\n30 + 0 = 30.<br \/>\n30 + 8 = 38.<\/p>\n<p><strong>Set D<\/strong><\/p>\n<p>You can use an open number line to add.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-3859\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-1st-Grade-Answers-Topic-10-Use-Models-and-Strategies-to-Add-Tens-and-Ones-80.3.png\" alt=\"Envision Math Common Core 1st Grade Answers Topic 10 Use Models and Strategies to Add Tens and Ones 80.3\" width=\"294\" height=\"160\" \/><\/p>\n<p>Use an open number line to add.<\/p>\n<p>Question 8.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-3860\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-1st-Grade-Answers-Topic-10-Use-Models-and-Strategies-to-Add-Tens-and-Ones-80.4.png\" alt=\"Envision Math Common Core 1st Grade Answers Topic 10 Use Models and Strategies to Add Tens and Ones 80.4\" width=\"306\" height=\"47\" \/><br \/>\n11 + 6 = ___<\/p>\n<p>Answer:<br \/>\n11 + 6 = 17.<\/p>\n<p>Explanation:<br \/>\nIn the above-given question,<br \/>\ngiven that,<br \/>\n10 + 7 = 17.<br \/>\n11 + 6 = 17.<\/p>\n<p><strong>Set E<\/strong><\/p>\n<p>You can use blocks to add tens to a number.<\/p>\n<p><img loading=\"lazy\" class=\"alignnone size-full wp-image-3861\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-1st-Grade-Answers-Topic-10-Use-Models-and-Strategies-to-Add-Tens-and-Ones-80.6.png\" alt=\"Envision Math Common Core 1st Grade Answers Topic 10 Use Models and Strategies to Add Tens and Ones 80.6\" width=\"195\" height=\"176\" \/><\/p>\n<p>Add the tens and the ones. Use blocks to help you.<\/p>\n<p>Question 9.<br \/>\n44 + 30 = ___<\/p>\n<p>Answer:<br \/>\n4 + 0 = 4.<\/p>\n<p>Explanation:<br \/>\nIn the above-given question,<br \/>\ngiven that,<br \/>\n40 + 30 = 70.<br \/>\n4 tens = 40.<br \/>\n3 tens = 30.<br \/>\n40 + 30 = 70.<\/p>\n<p>Question 10.<br \/>\n20 + 5 = ___<\/p>\n<p>Answer:<br \/>\n20 + 5 = 25.<\/p>\n<p>Explanation:<br \/>\nIn the above-given question,<br \/>\ngiven that,<br \/>\n0 + 5 = 5.<br \/>\n20 + 0 = 20.<br \/>\n20 + 5 = 25.<\/p>\n<p>Question 11.<br \/>\n30 + 28 = ___<\/p>\n<p>Answer:<br \/>\n30 + 28 = 58.<\/p>\n<p>Explanation:<br \/>\nIn the above-given question,<br \/>\ngiven that,<br \/>\n0 + 8 = 8.<br \/>\n30 + 20 = 50.<br \/>\n50 + 8 = 58.<br \/>\n30 + 28 = 58.<\/p>\n<p>Question 12.<br \/>\n19 + 60 = ___<\/p>\n<p>Answer:<br \/>\n19 + 60 = 79.<\/p>\n<p>Explanation:<br \/>\nIn the above-given question,<br \/>\ngiven that,<br \/>\n9 + 0 = 9.<br \/>\n10 + 60 = 70.<br \/>\n70 + 9 = 79.<br \/>\n19 + 60 = 79.<\/p>\n<p><strong>Set F<\/strong><\/p>\n<p>Sometimes you can make 10 when you add.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-3862\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-1st-Grade-Answers-Topic-10-Use-Models-and-Strategies-to-Add-Tens-and-Ones-80.7.png\" alt=\"Envision Math Common Core 1st Grade Answers Topic 10 Use Models and Strategies to Add Tens and Ones 80.7\" width=\"196\" height=\"220\" \/><\/p>\n<p>Draw blocks and make a 10 to add.<\/p>\n<p>Question 13.<br \/>\n33 + 9<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-3863\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-1st-Grade-Answers-Topic-10-Use-Models-and-Strategies-to-Add-Tens-and-Ones-80.8.png\" alt=\"Envision Math Common Core 1st Grade Answers Topic 10 Use Models and Strategies to Add Tens and Ones 80.8\" width=\"298\" height=\"111\" \/><br \/>\nThink: 33 + __ = 40<br \/>\nSo, break apart 9 into ___ + ___.<br \/>\n40 + __ = ___<br \/>\nSo, 33 + 9 = ___<\/p>\n<p>Answer:<br \/>\n33 + 9 = 42.<\/p>\n<p>Explanation:<br \/>\nIn the above-given question,<br \/>\ngiven that,<br \/>\n33 + 7 = 40.<br \/>\n9 = 5 + 4.<br \/>\n33 + 9 = 42.<\/p>\n<p><strong>Set G<\/strong><\/p>\n<p>You can draw blocks to help you add. First add the ones. Then add the tens.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-3864\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-1st-Grade-Answers-Topic-10-Use-Models-and-Strategies-to-Add-Tens-and-Ones-80.9.png\" alt=\"Envision Math Common Core 1st Grade Answers Topic 10 Use Models and Strategies to Add Tens and Ones 80.9\" width=\"149\" height=\"98\" \/><br \/>\nThere are 4 tens and 3 ones. 24 + 19 = 43<\/p>\n<p>Add. Draw blocks to help.<\/p>\n<p>Question 14.<br \/>\nFind 67 + 16.<br \/>\n7 + 6 = ___<br \/>\n60 + 10 = ___<br \/>\n67 + 16 = ___<\/p>\n<p>Answer:<br \/>\n67 + 16 = 83.<\/p>\n<p>Explanation:<br \/>\nIn the above-given question,<br \/>\ngiven that,<br \/>\n7 + 6 = 13.<br \/>\n60 + 10 = 70.<br \/>\n67 + 16 = 83.<\/p>\n<p><strong>Set H<\/strong><\/p>\n<p><strong>Thinking Habits<\/strong><br \/>\n<strong>Model with Math<\/strong><\/p>\n<p>Can I use a drawing, diagram, table, or graph to model the problem? Can I write an equation to show the problem?<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-3865\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-1st-Grade-Answers-Topic-10-Use-Models-and-Strategies-to-Add-Tens-and-Ones-90.1.png\" alt=\"Envision Math Common Core 1st Grade Answers Topic 10 Use Models and Strategies to Add Tens and Ones 90.1\" width=\"132\" height=\"143\" \/><\/p>\n<p>Use drawings to show and solve the problem. Then write the equation.<\/p>\n<p>Question 15.<br \/>\nSally sees 15 birds. Then she sees 17 more. How many birds did Sally see in all?<br \/>\n___ + ___ = ___<\/p>\n<p>Answer:<br \/>\nThe number of birds did Sally see in all = 32.<\/p>\n<p>Explanation:<br \/>\nIn the above-given question,<br \/>\ngiven that,<br \/>\nSally sees 15 birds.<br \/>\nThen she sees 17 more.<br \/>\n15 + 17 = 32.<br \/>\nso the number of birds did Sally see in all = 32.<\/p>\n<h3>Topic 10 Assessment Practice<\/h3>\n<p>Question 1.<br \/>\nWrite an equation that matches the place-value blocks below.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-3866\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-1st-Grade-Answers-Topic-10-Use-Models-and-Strategies-to-Add-Tens-and-Ones-90.3.png\" alt=\"Envision Math Common Core 1st Grade Answers Topic 10 Use Models and Strategies to Add Tens and Ones 90.3\" width=\"212\" height=\"169\" \/><\/p>\n<p>Answer:<br \/>\n5 tens + 8 ones = 58.<\/p>\n<p>Explanation:<br \/>\nIn the above-given question,<br \/>\ngiven that,<br \/>\n5 tens = 50.<br \/>\n8 ones = 8.<br \/>\n5 tens + 8 ones = 58.<\/p>\n<p>Question 2.<br \/>\nFind the sum. Draw place-value blocks to show how you found it. 50 + 3 = ___<\/p>\n<p>Answer:<br \/>\n50 + 3 = 53.<\/p>\n<p>Explanation:<br \/>\nIn the above-given question,<br \/>\ngiven that,<br \/>\n0 + 3 = 3.<br \/>\n5 tens = 5 tens.<br \/>\n3 ones = 3.<br \/>\n5 tens + 3 ones = 53.<\/p>\n<p>Question 3.<br \/>\nFind the sum of 16 and 18.<br \/>\nUse words, pictures, or a model to solve. Write the equation.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-3813\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-1st-Grade-Answer-Key-Topic-10-Use-Models-and-Strategies-to-Add-Tens-and-Ones-90.33.png\" alt=\"Envision Math Common Core 1st Grade Answer Key Topic 10 Use Models and Strategies to Add Tens and Ones 90.33\" width=\"372\" height=\"203\" \/><\/p>\n<p>Answer:<br \/>\n16 + 18 = 34.<\/p>\n<p>Explanation:<br \/>\nIn the above-given question,<br \/>\ngiven that,<br \/>\n16 + 18 = 34.<br \/>\n6 + 8 = 14.<br \/>\n10 + 10 = 20.<br \/>\n20 + 14 = 34.<br \/>\n16 + 18 = 34.<\/p>\n<p>Question 4.<br \/>\nWhich equation matches the place-value blocks shown below? Choose two that apply.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-3801\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-1st-Grade-Answer-Key-Topic-10-Use-Models-and-Strategies-to-Add-Tens-and-Ones-90.4.png\" alt=\"Envision Math Common Core 1st Grade Answer Key Topic 10 Use Models and Strategies to Add Tens and Ones 90.4\" width=\"254\" height=\"108\" \/><br \/>\nAnswer:<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-3802\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-1st-Grade-Answer-Key-Topic-10-Use-Models-and-Strategies-to-Add-Tens-and-Ones-90.5.png\" alt=\"Envision Math Common Core 1st Grade Answer Key Topic 10 Use Models and Strategies to Add Tens and Ones 90.5\" width=\"28\" height=\"28\" \/> 60 + 30 = 90<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-3802\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-1st-Grade-Answer-Key-Topic-10-Use-Models-and-Strategies-to-Add-Tens-and-Ones-90.5.png\" alt=\"Envision Math Common Core 1st Grade Answer Key Topic 10 Use Models and Strategies to Add Tens and Ones 90.5\" width=\"28\" height=\"28\" \/> 6 tens + 3 tens = 9 tens<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-3802\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-1st-Grade-Answer-Key-Topic-10-Use-Models-and-Strategies-to-Add-Tens-and-Ones-90.5.png\" alt=\"Envision Math Common Core 1st Grade Answer Key Topic 10 Use Models and Strategies to Add Tens and Ones 90.5\" width=\"28\" height=\"28\" \/> 60 + 10 = 70<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-3802\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-1st-Grade-Answer-Key-Topic-10-Use-Models-and-Strategies-to-Add-Tens-and-Ones-90.5.png\" alt=\"Envision Math Common Core 1st Grade Answer Key Topic 10 Use Models and Strategies to Add Tens and Ones 90.5\" width=\"28\" height=\"28\" \/> 4 tens + 3 tens = 7 tens<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-3802\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-1st-Grade-Answer-Key-Topic-10-Use-Models-and-Strategies-to-Add-Tens-and-Ones-90.5.png\" alt=\"Envision Math Common Core 1st Grade Answer Key Topic 10 Use Models and Strategies to Add Tens and Ones 90.5\" width=\"28\" height=\"28\" \/> 6 tens + 3 ones = 9 ones<\/p>\n<p>Answer:<br \/>\nOptions A and B are correct.<\/p>\n<p>Explanation:<br \/>\nIn the above-given question,<br \/>\ngiven that,<br \/>\n60 + 30 = 90.<br \/>\n6 tens + 3 tens = 9 tens.<br \/>\nso options A and B are correct.<\/p>\n<p>Question 5.<br \/>\nFind the sum of 18 and 11. Explain how you solved the problem. Did you need to make a 10?<\/p>\n<p>Answer:<br \/>\nThe sum of 18 and 11 = 29.<\/p>\n<p>Explanation:<br \/>\nIn the above-given question,<br \/>\ngiven that,<br \/>\n18 + 11 = 29.<br \/>\n10 + 10 = 20.<br \/>\n8 + 1 = 9.<br \/>\n20 + 9 = 29.<br \/>\nso the sum of 18 and 11 = 29.<\/p>\n<p>Question 6.<br \/>\nSolve the problem.<br \/>\nUse place-value blocks if needed. 28 + 13 = Can you make a 10? Explain.<br \/>\nCircle Yes or No.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-3803\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-1st-Grade-Answer-Key-Topic-10-Use-Models-and-Strategies-to-Add-Tens-and-Ones-90.6.png\" alt=\"Envision Math Common Core 1st Grade Answer Key Topic 10 Use Models and Strategies to Add Tens and Ones 90.6\" width=\"364\" height=\"88\" \/><\/p>\n<p>Answer:<br \/>\n28 + 13 = 41.<\/p>\n<p>Explanation:<br \/>\nIn the above-given question,<br \/>\ngiven that,<br \/>\n28 + 13 = 41.<br \/>\n20 + 10 = 30.<br \/>\n8 + 3 = 11.<br \/>\n28 + 13 = 41.<\/p>\n<p>Question 7.<br \/>\nUse the part of the hundred chart to add. Choose the possible explanation for how to find 46 + 20.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-3804\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-1st-Grade-Answer-Key-Topic-10-Use-Models-and-Strategies-to-Add-Tens-and-Ones-90.7.png\" alt=\"Envision Math Common Core 1st Grade Answer Key Topic 10 Use Models and Strategies to Add Tens and Ones 90.7\" width=\"293\" height=\"123\" \/><br \/>\nA. I start at 46 and then move two rows up to get 26. So, 46 + 20 = 26.<br \/>\nB. I start at 46 and then move one row down and four columns to the right to get 60. So, 46 + 20 = 60.<br \/>\nC. I start at 46 and then move two rows down to get 66. So, 46 + 20 = 66.<br \/>\nD. I start at 46 and then move two rows down to get 68. So, 46 + 20 = 68.<\/p>\n<p>Answer:<br \/>\nOption C is correct.<\/p>\n<p>Explanation:<br \/>\nIn the above-given question,<br \/>\ngiven that,<br \/>\n46 + 20 = 66.<br \/>\nI start at 46 and then move two rows down to get 66.<br \/>\n46 + 20 = 66.<br \/>\nso option C is correct.<\/p>\n<p>Use the part of the hundred chart to solve each problem. What is one way to explain your answer?<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-3805\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-1st-Grade-Answer-Key-Topic-10-Use-Models-and-Strategies-to-Add-Tens-and-Ones-90.8.png\" alt=\"Envision Math Common Core 1st Grade Answer Key Topic 10 Use Models and Strategies to Add Tens and Ones 90.8\" width=\"333\" height=\"148\" \/><\/p>\n<p>Question 8.<br \/>\n10 + 27 = ?<br \/>\nA. 17; I started at 27 and subtracted 1 ten.<br \/>\nB. 28; I started at 27 and added 1 ten.<br \/>\nC. 37; I started at 27 and added 1 ten.<br \/>\nD. 40; I started at 10 and added 3 tens.<\/p>\n<p>Answer:<br \/>\nOption C is correct.<\/p>\n<p>Explanation:<br \/>\nIn the above-given question,<br \/>\ngiven that,<br \/>\n10 + 27 = 37.<br \/>\nI started at 27 and added 1 ten.<br \/>\n27 + 10 = 37.<br \/>\nso option C is correct.<\/p>\n<p>Question 9.<br \/>\n4 + 35 = ?<br \/>\nA. 95; I started at 35 and added 4 tens.<br \/>\nB. 39; I started at 35 and added 4 ones.<br \/>\nC. 31; I started at 35 and subtracted 4 ones.<br \/>\nD. 12; I started at 32 and subtracted 2 tens.<\/p>\n<p>Answer:<br \/>\nOption B is correct.<\/p>\n<p>Explanation:<br \/>\nIn the above-given question,<br \/>\ngiven that,<br \/>\n4 + 35 = 39.<br \/>\nI started at 35.<br \/>\nadded the 4 ones to 35.<br \/>\n35 + 4 = 39.<\/p>\n<p>Use mental math to solve. Then explain how you found your answer.<\/p>\n<p>Question 10.<br \/>\n53 + 10 = ___<\/p>\n<p>Answer:<br \/>\n53 + 10 = 63.<\/p>\n<p>Explanation:<br \/>\nIn the above-given question,<br \/>\ngiven that,<br \/>\n3 + 0 = 3.<br \/>\n50 + 10 = 60.<br \/>\n60 + 3 = 63.<br \/>\n53 + 10 = 63.<\/p>\n<p>Question 11.<br \/>\n48 + 10 = ___<\/p>\n<p>Answer:<br \/>\n48 + 10 = 58.<\/p>\n<p>Explanation:<br \/>\nIn the above-given question,<br \/>\ngiven that,<br \/>\n48 + 10 = 58.<br \/>\n40 + 10 = 50.<br \/>\n8 + 0 = 8.<br \/>\n50 + 8 = 58.<br \/>\n48 + 10 = 58.<\/p>\n<p>Question 12.<br \/>\n64 + 10 = ___<\/p>\n<p>Answer:<br \/>\n64 + 10 = 74.<\/p>\n<p>Explanation:<br \/>\nIn the above-given question,<br \/>\ngiven that,<br \/>\n64 + 10 = 74.<br \/>\n4 + 0 = 4.<br \/>\n60 + 10 = 70.<br \/>\n70 + 4 = 74.<\/p>\n<p>Find the correct number to complete each equation.<\/p>\n<p>Question 13.<br \/>\n20 + 70 = ___<\/p>\n<p>Answer:<br \/>\n20 + 70 = 90.<\/p>\n<p>Explanation:<br \/>\nIn the above-given question,<br \/>\ngiven that,<br \/>\n2 tens + 7 tens.<br \/>\n2 tens = 20.<br \/>\n7 tens = 70.<br \/>\n20 + 70 = 90.<\/p>\n<p>Question 14.<br \/>\n30 + ___ = 60<\/p>\n<p>Answer:<br \/>\n30 + 30 = 60.<\/p>\n<p>Explanation:<br \/>\nIn the above-given question,<br \/>\ngiven that,<br \/>\n3 tens =30.<br \/>\n3 tens =30<\/p>\n<p>30 + 30 = 60.<\/p>\n<p>Question 15.<br \/>\n__ + 20 = 40<\/p>\n<p>Answer:<br \/>\n20 + 20 =40.<\/p>\n<p>Explanation:<br \/>\nIn the above-given question,<br \/>\ngiven that,<br \/>\n2 tens = 20.<br \/>\n2 tens =20.<\/p>\n<p>20 + 20 = 40.<\/p>\n<p>Question 16.<br \/>\nUse the open number line to find 40 + 23. Show your work.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-3806\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-1st-Grade-Answer-Key-Topic-10-Use-Models-and-Strategies-to-Add-Tens-and-Ones-90.10.png\" alt=\"Envision Math Common Core 1st Grade Answer Key Topic 10 Use Models and Strategies to Add Tens and Ones 90.10\" width=\"707\" height=\"61\" \/><\/p>\n<p>Answer:<br \/>\n40 + 23 = 63.<\/p>\n<p>Explanation:<br \/>\nIn the above-given question,<br \/>\ngiven that,<br \/>\n23 + 10 = 33.<br \/>\n33 + 10 = 43.<br \/>\n43 + 10 = 53.<br \/>\n53 + 10 = 63.<\/p>\n<p>Question 17.<br \/>\nFind 43 + 8. Do the models correctly show the sum? Explain how you know.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-3807\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-1st-Grade-Answer-Key-Topic-10-Use-Models-and-Strategies-to-Add-Tens-and-Ones-90.15.png\" alt=\"Envision Math Common Core 1st Grade Answer Key Topic 10 Use Models and Strategies to Add Tens and Ones 90.15\" width=\"286\" height=\"234\" \/><\/p>\n<p>Answer:<br \/>\n43 + 8 = 51.<\/p>\n<p>Explanation:<br \/>\nIn the above-given question,<br \/>\ngiven that,<br \/>\n8 + 3 = 11.<br \/>\n40 + 0 = 40.<br \/>\n40 + 11 = 51.<br \/>\n43 + 8 = 51.<\/p>\n<p>Solve each problem. Can you make a 10? Use place-value blocks if needed.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-3808\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-1st-Grade-Answer-Key-Topic-10-Use-Models-and-Strategies-to-Add-Tens-and-Ones-90.16.png\" alt=\"Envision Math Common Core 1st Grade Answer Key Topic 10 Use Models and Strategies to Add Tens and Ones 90.16\" width=\"409\" height=\"226\" \/><\/p>\n<p>Answer:<br \/>\n42 + 37 = 79.<br \/>\n16 + 35 = 51.<br \/>\n14 + 16 = 30.<\/p>\n<p>Explanation:<br \/>\nIn the above-given question,<br \/>\ngiven that,<br \/>\n40 + 2 = 42.<br \/>\n30 + 7 = 37.<br \/>\n42 + 37 = 79.<\/p>\n<p>10 + 6 = 16.<br \/>\n30 + 5 = 35.<br \/>\n16 + 35 = 51.<\/p>\n<p>10 + 4 = 14.<br \/>\n10 + 6 = 16.<br \/>\n14 + 16 = 30.<\/p>\n<p><strong>Pet Survey<\/strong><\/p>\n<p>Maria asked other students what kind of pet they have. She made this chart.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-3809\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-1st-Grade-Answer-Key-Topic-10-Use-Models-and-Strategies-to-Add-Tens-and-Ones-90.17.png\" alt=\"Envision Math Common Core 1st Grade Answer Key Topic 10 Use Models and Strategies to Add Tens and Ones 90.17\" width=\"296\" height=\"232\" \/><\/p>\n<p>Question 1.<br \/>\nHow many Fish and Cats in all? Use the open number line to solve.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-3810\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-1st-Grade-Answer-Key-Topic-10-Use-Models-and-Strategies-to-Add-Tens-and-Ones-90.18.png\" alt=\"Envision Math Common Core 1st Grade Answer Key Topic 10 Use Models and Strategies to Add Tens and Ones 90.18\" width=\"285\" height=\"60\" \/><br \/>\n___ fish and cats<\/p>\n<p>Answer:<br \/>\nThe number of fish and cats = 57.<\/p>\n<p>Explanation:<br \/>\nIn the above-given question,<br \/>\ngiven that,<br \/>\nthere are 27 fish in the chart.<br \/>\nthere are 30 cats in the chart.<br \/>\n27 + 30 = 57.<br \/>\nso the number of fish and cats = 57.<\/p>\n<p>Question 2.<br \/>\nHow many Dogs and Birds in all? Use the hundred chart to add.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-3811\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-1st-Grade-Answer-Key-Topic-10-Use-Models-and-Strategies-to-Add-Tens-and-Ones-90.20.png\" alt=\"Envision Math Common Core 1st Grade Answer Key Topic 10 Use Models and Strategies to Add Tens and Ones 90.20\" width=\"333\" height=\"263\" \/><br \/>\n__ + __ = ___<br \/>\n__ dogs and birds<\/p>\n<p>Answer:<br \/>\nThe number of dogs and birds = 47.<\/p>\n<p>Explanation:<br \/>\nIn the above-given question,<br \/>\ngiven that,<br \/>\nthere are 8 birds in the chart.<br \/>\nthere are 39 dogs in the chart.<br \/>\n8 + 39 = 47.<br \/>\nso the number of dogs and birds = 47.<\/p>\n<p>Question 3.<br \/>\nMaria asks 18 students about their pets on Monday. She asks 17 students about their pets on Tuesday. How many students did she ask on both days?<br \/>\nUse place-value blocks to solve. Draw the blocks you used.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-3814\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-1st-Grade-Answer-Key-Topic-10-Use-Models-and-Strategies-to-Add-Tens-and-Ones-90.200.png\" alt=\"Envision Math Common Core 1st Grade Answer Key Topic 10 Use Models and Strategies to Add Tens and Ones 90.200\" width=\"308\" height=\"183\" \/><br \/>\nDid you need to make a 10 when you added the ones? Explain your answer.<\/p>\n<p>Answer:<br \/>\nThe number of students did she ask on both days = 35.<\/p>\n<p>Explanation:<br \/>\nIn the above-given question,<br \/>\ngiven that,<br \/>\nMaria asks 18 students about their pets on Monday.<br \/>\nShe asks 17 students about their pets on Tuesday.<br \/>\n18 + 17 = 35.<br \/>\nso the number of students did she ask on both days = 35.<\/p>\n<p>Question 4.<br \/>\nMaria adds other pets to her chart. 19 students in first grade have a rabbit. 24 students in second grade have a rabbit. How many students in all have rabbits?<br \/>\n<strong>Part A<\/strong><br \/>\nDraw blocks to help you solve the problem.<br \/>\n<strong>Part B<\/strong><br \/>\nWrite an equation that matches the story.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-3812\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-1st-Grade-Answer-Key-Topic-10-Use-Models-and-Strategies-to-Add-Tens-and-Ones-90.21.png\" alt=\"Envision Math Common Core 1st Grade Answer Key Topic 10 Use Models and Strategies to Add Tens and Ones 90.21\" width=\"318\" height=\"50\" \/><\/p>\n<p>Answer:<br \/>\nThe number of students in all has rabbits = 43.<\/p>\n<p>Explanation:<br \/>\nIn the above-given question,<br \/>\ngiven that,<br \/>\nMaria adds other pets to her chart.<br \/>\n19 students in first grade have a rabbit.<br \/>\n24 students in second grade have a rabbit.<br \/>\n19 + 24 = 43.<br \/>\nso the number of students in all has rabbits = 43.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Practice with the help of enVision Math Common Core Grade 1 Answer Key Topic 10 Use Models and Strategies to Add Tens and Ones regularly and improve your accuracy in solving questions. enVision Math Common Core 1st Grade Answers Key Topic 10 Use Models and Strategies to Add Tens and Ones enVision STEM Project: Watch &#8230; <a title=\"enVision Math Common Core Grade 1 Answer Key Topic 10 Use Models and Strategies to Add Tens and Ones\" class=\"read-more\" href=\"https:\/\/bigideasmathanswers.com\/envision-math-common-core-grade-1-answer-key-topic-10\/\" aria-label=\"More on enVision Math Common Core Grade 1 Answer Key Topic 10 Use Models and Strategies to Add Tens and Ones\">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\/89991"}],"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=89991"}],"version-history":[{"count":1,"href":"https:\/\/bigideasmathanswers.com\/wp-json\/wp\/v2\/posts\/89991\/revisions"}],"predecessor-version":[{"id":89992,"href":"https:\/\/bigideasmathanswers.com\/wp-json\/wp\/v2\/posts\/89991\/revisions\/89992"}],"wp:attachment":[{"href":"https:\/\/bigideasmathanswers.com\/wp-json\/wp\/v2\/media?parent=89991"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/bigideasmathanswers.com\/wp-json\/wp\/v2\/categories?post=89991"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/bigideasmathanswers.com\/wp-json\/wp\/v2\/tags?post=89991"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}