{"id":89979,"date":"2022-03-31T17:09:39","date_gmt":"2022-03-31T11:39:39","guid":{"rendered":"https:\/\/bigideasmathanswers.com\/?p=89979"},"modified":"2022-04-07T14:45:14","modified_gmt":"2022-04-07T09:15:14","slug":"envision-math-common-core-grade-1-answer-key-topic-4","status":"publish","type":"post","link":"https:\/\/bigideasmathanswers.com\/envision-math-common-core-grade-1-answer-key-topic-4\/","title":{"rendered":"enVision Math Common Core Grade 1 Answer Key Topic 4 Subtraction Facts to 20: Use Strategies"},"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 4 Subtraction Facts to 20: Use Strategies<\/strong> regularly and improve your accuracy in solving questions.<\/p>\n<h2>enVision Math Common Core 1st Grade Answers Key Topic 4 Subtraction Facts to 20: Use Strategies<\/h2>\n<p><img loading=\"lazy\" class=\"alignnone size-full wp-image-2671\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-Grade-1-Answer-Key-Topic-4-Subtraction-Facts-to-20-Use-Strategies-1.png\" alt=\"Envision Math Common Core Grade 1 Answer Key Topic 4 Subtraction Facts to 20 Use Strategies 1\" width=\"736\" height=\"343\" \/><br \/>\nenVision STEM Project: Pattern of Day and Night<br \/>\nFind Out Talk to friends or relatives about how day and night changes on Earth.<br \/>\nHow do day and night change as the Earth turns?<br \/>\nJournal: Make a Book Draw pictures of the day sky and the night sky. In your book, also:<\/p>\n<ul>\n<li>Draw objects that appear in the day and night skies.<\/li>\n<li>Write subtraction problems about objects that appear in the sky.<\/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 number that is 4 fewer than 8.<br \/>\n10<br \/>\n6<br \/>\n4<br \/>\n0<br \/>\nAnswer: 4<\/p>\n<p>Explanation:<br \/>\nThe number that is 4 fewer than 8 is<br \/>\n8 &#8211; 4 = 4<br \/>\nThus the correct answer is 4.<\/p>\n<p>Question 2.<br \/>\nCircle the doubles fact.<br \/>\n3 + 7 = 10<br \/>\n8 + 0 = 8<br \/>\n3 + 4 = 7<br \/>\n6 + 6 = 12<br \/>\nAnswer: 3 + 4 = 7<\/p>\n<p>Question 3.<br \/>\nCircle the doubles-plus fact.<br \/>\n4 +5 = 9<br \/>\n3 + 6 = 9<br \/>\n2 + 5 = 7<br \/>\n4 + 4 = 8<br \/>\nAnswer: 3 + 6 = 9<\/p>\n<p><strong>Subtraction Stories<\/strong><\/p>\n<p>Question 4.<br \/>\nMolly has 6 goldfish. She gives 3 goldfish to Nick. How many gold fish does Molly have now? Write an equation to show the difference.<br \/>\n__ &#8211; ___ = ____<br \/>\nAnswer:<br \/>\nGiven.<br \/>\nMolly has 6 goldfish. She gives 3 goldfish to Nick.<br \/>\nThe subtraction equation would be<br \/>\n6 &#8211; 3 = 3<br \/>\nTherefore Molly has 3 goldfish now.<\/p>\n<p>Question 5.<br \/>\nKatie has 7 stamps. She gives 2 stamps to Jamie. How many stamps does Katie have now? Write an equation to show the difference.<br \/>\n__ &#8211; ___ = ____<br \/>\nAnswer:<br \/>\nGiven that,<br \/>\nKatie has 7 stamps. She gives 2 stamps to Jamie.<br \/>\n7 &#8211; 2 = 5<br \/>\nThus Katie has 5 stamps now.<\/p>\n<p><strong>Parts and Whole<\/strong><\/p>\n<p>Question 6.<br \/>\nWrite the parts and the whole for 9 &#8211; 1 = 8.<br \/>\nWhole: ___<br \/>\nPart: ____<br \/>\nAnswer:<br \/>\nWhole: 9<br \/>\nPart: 1<br \/>\nPart: 8<\/p>\n<p>Explanation:<br \/>\nAs per the number bond concept, 9 is called the whole part, 8 and 1 are called parts of the whole.<\/p>\n<p><strong>Pick a Project<\/strong><\/p>\n<p><strong>PROJECT 4A<\/strong><br \/>\nWhat pizza topping would make you laugh?<br \/>\nProject: Write a Funny Pizza Poem<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-2672\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-Grade-1-Answer-Key-Topic-4-Subtraction-Facts-to-20-Use-Strategies-2.png\" alt=\"Envision Math Common Core Grade 1 Answer Key Topic 4 Subtraction Facts to 20 Use Strategies 2\" width=\"464\" height=\"256\" \/><\/p>\n<p><strong>PROJECT 4B<\/strong><br \/>\nDo you know your vegetables?<br \/>\nProject: Play Vegetable Subtraction<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-2673\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-Grade-1-Answer-Key-Topic-4-Subtraction-Facts-to-20-Use-Strategies-3.png\" alt=\"Envision Math Common Core Grade 1 Answer Key Topic 4 Subtraction Facts to 20 Use Strategies 3\" width=\"453\" height=\"263\" \/><\/p>\n<p><strong>PROJECT 4C<\/strong><br \/>\nHow can you play baseball without a ball?<br \/>\nProject: Play Baseball!<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-2674\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-Grade-1-Answer-Key-Topic-4-Subtraction-Facts-to-20-Use-Strategies-4.png\" alt=\"Envision Math Common Core Grade 1 Answer Key Topic 4 Subtraction Facts to 20 Use Strategies 4\" width=\"475\" height=\"301\" \/><\/p>\n<p><strong>PROJECT 4D<\/strong><br \/>\nHow much do some classroom items cost?<br \/>\nProject: Buy Classroom Items<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-2675\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-Grade-1-Answer-Key-Topic-4-Subtraction-Facts-to-20-Use-Strategies-5.png\" alt=\"Envision Math Common Core Grade 1 Answer Key Topic 4 Subtraction Facts to 20 Use Strategies 5\" width=\"467\" height=\"292\" \/><\/p>\n<h3>Lesson 4.1 Count to Subtract<\/h3>\n<p><strong>Solve &amp; Share<\/strong><\/p>\n<p>Marc has 13 erasers. He gives 5 of them to Troy. How many erasers does Marc have now? Show your thinking in the space below.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-2676\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-Grade-1-Answer-Key-Topic-4-Subtraction-Facts-to-20-Use-Strategies-6.1.png\" alt=\"Envision Math Common Core Grade 1 Answer Key Topic 4 Subtraction Facts to 20 Use Strategies 6.1\" width=\"245\" height=\"186\" \/><br \/>\nMarc has ____ erasers now.<\/p>\n<p>Answer:<br \/>\nGiven that,<br \/>\nMarc has 13 erasers. He gives 5 of them to Troy.<br \/>\n13 &#8211; 5 = 8<br \/>\nThus Marc has 8 erasers.<\/p>\n<p><strong>Visual Learning Bridge<\/strong><br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-2677\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-Grade-1-Answer-Key-Topic-4-Subtraction-Facts-to-20-Use-Strategies-6.2.png\" alt=\"Envision Math Common Core Grade 1 Answer Key Topic 4 Subtraction Facts to 20 Use Strategies 6.2\" width=\"788\" height=\"237\" \/><\/p>\n<p><strong>Convince Me!<\/strong><br \/>\nHow can you use a number line to solve 9 &#8211; 5?<\/p>\n<p>Answer: 4<\/p>\n<p><strong>Guided Practice<\/strong><\/p>\n<p>Find the difference. Use the number line.<\/p>\n<p>Question 1.<br \/>\n11 &#8211; 3 = <u>8<\/u><br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-2678\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-Grade-1-Answer-Key-Topic-4-Subtraction-Facts-to-20-Use-Strategies-6.3.png\" alt=\"Envision Math Common Core Grade 1 Answer Key Topic 4 Subtraction Facts to 20 Use Strategies 6.3\" width=\"523\" height=\"92\" \/><br \/>\nAnswer: 8<\/p>\n<p>Question 2.<br \/>\n__ = 15 &#8211; 6<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-2679\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-Grade-1-Answer-Key-Topic-4-Subtraction-Facts-to-20-Use-Strategies-6.4.png\" alt=\"Envision Math Common Core Grade 1 Answer Key Topic 4 Subtraction Facts to 20 Use Strategies 6.4\" width=\"524\" height=\"50\" \/><br \/>\nAnswer: 9<\/p>\n<p><strong>Independent Practice<\/strong><\/p>\n<p>Find the difference. Use the number line.<\/p>\n<p>Question 3.<br \/>\n11 \u2013 6 = ___<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-2680\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-Grade-1-Answer-Key-Topic-4-Subtraction-Facts-to-20-Use-Strategies-6.5.png\" alt=\"Envision Math Common Core Grade 1 Answer Key Topic 4 Subtraction Facts to 20 Use Strategies 6.5\" width=\"565\" height=\"87\" \/><br \/>\nAnswer: 5<\/p>\n<p>Question 4.<br \/>\n___ = 7 &#8211; 7<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-2681\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-Grade-1-Answer-Key-Topic-4-Subtraction-Facts-to-20-Use-Strategies-6.6.png\" alt=\"Envision Math Common Core Grade 1 Answer Key Topic 4 Subtraction Facts to 20 Use Strategies 6.6\" width=\"576\" height=\"80\" \/><br \/>\nAnswer: 0<\/p>\n<p>Question 5.<br \/>\n15 \u2013 __ = 7<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-2682\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-Grade-1-Answer-Key-Topic-4-Subtraction-Facts-to-20-Use-Strategies-6.7.png\" alt=\"Envision Math Common Core Grade 1 Answer Key Topic 4 Subtraction Facts to 20 Use Strategies 6.7\" width=\"573\" height=\"71\" \/><br \/>\nAnswer: 8<\/p>\n<p><strong>Problem Solving<\/strong><br \/>\nSolve the problems.<\/p>\n<p>Question 6.<br \/>\n<strong>Use Tools<\/strong><br \/>\nHelp David find 16 \u2013 7 on a number line. Fill in the blanks.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-2683\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-Grade-1-Answer-Key-Topic-4-Subtraction-Facts-to-20-Use-Strategies-6.8.png\" alt=\"Envision Math Common Core Grade 1 Answer Key Topic 4 Subtraction Facts to 20 Use Strategies 6.8\" width=\"218\" height=\"181\" \/><br \/>\nStart at ___. Count back ___. 16 \u2013 7 = ___<br \/>\nAnswer:<br \/>\nStart at 16.<br \/>\nCount back 7.<br \/>\n16 \u2013 7 = 9<\/p>\n<p>Question 7.<br \/>\n<strong>Higher Order Thinking<\/strong><br \/>\nJenny draws 14 frogs. Adam draws 6 frogs. How many more frogs does Jenny draw than Adam? Write an equation.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-2684\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-Grade-1-Answer-Key-Topic-4-Subtraction-Facts-to-20-Use-Strategies-6.9.png\" alt=\"Envision Math Common Core Grade 1 Answer Key Topic 4 Subtraction Facts to 20 Use Strategies 6.9\" width=\"650\" height=\"103\" \/><br \/>\nAnswer:<br \/>\nGiven,<br \/>\nJenny draws 14 frogs.<br \/>\nAdam draws 6 frogs.<br \/>\n6 + 8 = 14<br \/>\n14 &#8211; 6 = 8<br \/>\nThus Jenny draw 8 frogs more than Adam.<\/p>\n<p>Question 8.<br \/>\n<strong>Assessment Practice<\/strong><br \/>\nUse the number line to find 15 \u2013 9. Show your work.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-2685\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-Grade-1-Answer-Key-Topic-4-Subtraction-Facts-to-20-Use-Strategies-6.10.png\" alt=\"Envision Math Common Core Grade 1 Answer Key Topic 4 Subtraction Facts to 20 Use Strategies 6.10\" width=\"587\" height=\"75\" \/><br \/>\n15 &#8211; 9 = ___<br \/>\nAnswer: 6<\/p>\n<h3>Lesson 4.2 Make 10 to Subtract<\/h3>\n<p><strong>Sove &amp; Share<\/strong><\/p>\n<p>How can thinking about 10 help you find 11 \u2013 7?<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-2686\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-Grade-1-Answer-Key-Topic-4-Subtraction-Facts-to-20-Use-Strategies-6.11.png\" alt=\"Envision Math Common Core Grade 1 Answer Key Topic 4 Subtraction Facts to 20 Use Strategies 6.11\" width=\"582\" height=\"429\" \/><\/p>\n<p><img loading=\"lazy\" class=\"alignnone size-full wp-image-2687\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-Grade-1-Answer-Key-Topic-4-Subtraction-Facts-to-20-Use-Strategies-6.12.png\" alt=\"Envision Math Common Core Grade 1 Answer Key Topic 4 Subtraction Facts to 20 Use Strategies 6.12\" width=\"792\" height=\"295\" \/><\/p>\n<p><strong>Convince Me!<\/strong><br \/>\nHow can finding 14 &#8211; 4 help you find 14 \u2013 6?<\/p>\n<p><strong>Guided Practice<\/strong><\/p>\n<p>Make 10 to subtract. Complete each subtraction fact.<\/p>\n<p>Question 1.<br \/>\n16 &#8211; 7 = ?<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-2688\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-Grade-1-Answer-Key-Topic-4-Subtraction-Facts-to-20-Use-Strategies-6.13.png\" alt=\"Envision Math Common Core Grade 1 Answer Key Topic 4 Subtraction Facts to 20 Use Strategies 6.13\" width=\"173\" height=\"221\" \/><\/p>\n<p>Question 2.<br \/>\n13 \u2013 8 = ?<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-2689\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-Grade-1-Answer-Key-Topic-4-Subtraction-Facts-to-20-Use-Strategies-6.14.png\" alt=\"Envision Math Common Core Grade 1 Answer Key Topic 4 Subtraction Facts to 20 Use Strategies 6.14\" width=\"135\" height=\"109\" \/><br \/>\n13 &#8211; __ = 10<br \/>\n10 &#8211; __ = ___<br \/>\nSo, 13 &#8211; 8 = ___<\/p>\n<p>Answer:<br \/>\n13 &#8211; 3 = 10<br \/>\n10 &#8211; 2 = 8<br \/>\n13 &#8211; 8 = 5<\/p>\n<p><strong>Independent Practice<\/strong><\/p>\n<p>Make 10 to subtract. Complete each subtraction fact.<\/p>\n<p>Question 3.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-2690\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-Grade-1-Answer-Key-Topic-4-Subtraction-Facts-to-20-Use-Strategies-6.15.png\" alt=\"Envision Math Common Core Grade 1 Answer Key Topic 4 Subtraction Facts to 20 Use Strategies 6.15\" width=\"127\" height=\"117\" \/><br \/>\n12 &#8211; 4 = ____<br \/>\nAnswer: 8<\/p>\n<p>Explanation:<br \/>\n12 &#8211; 2 = 10<br \/>\n10 &#8211; 2 = 8<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-4213\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-Grade-1-Answer-Key-Topic-4-Subtraction-Facts-to-20-Use-Strategies-6.15-1.png\" alt=\"Envision-Math-Common-Core-Grade-1-Answer-Key-Topic-4-Subtraction-Facts-to-20-Use-Strategies-6.15\" width=\"127\" height=\"117\" \/><\/p>\n<p>Question 4.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-2691\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-Grade-1-Answer-Key-Topic-4-Subtraction-Facts-to-20-Use-Strategies-6.16.png\" alt=\"Envision Math Common Core Grade 1 Answer Key Topic 4 Subtraction Facts to 20 Use Strategies 6.16\" width=\"127\" height=\"116\" \/><br \/>\n14 &#8211; 6 = ___<br \/>\nAnswer: 8<\/p>\n<p>Explanation:<br \/>\n14 &#8211; 4 = 10<br \/>\n10 &#8211; 2 = 8<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-4214\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-Grade-1-Answer-Key-Topic-4-Subtraction-Facts-to-20-Use-Strategies-6.16-1.png\" alt=\"Envision-Math-Common-Core-Grade-1-Answer-Key-Topic-4-Subtraction-Facts-to-20-Use-Strategies-6.16\" width=\"127\" height=\"116\" \/><\/p>\n<p>Question 5.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-2692\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-Grade-1-Answer-Key-Topic-4-Subtraction-Facts-to-20-Use-Strategies-6.17.png\" alt=\"Envision Math Common Core Grade 1 Answer Key Topic 4 Subtraction Facts to 20 Use Strategies 6.17\" width=\"125\" height=\"121\" \/><br \/>\n16 &#8211; 9 = __<br \/>\nAnswer: 7<\/p>\n<p>Explanation:<br \/>\n16 &#8211; 6 = 10<br \/>\n10 &#8211; 3 = 7<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-4215\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-Grade-1-Answer-Key-Topic-4-Subtraction-Facts-to-20-Use-Strategies-6.17-1.png\" alt=\"Envision-Math-Common-Core-Grade-1-Answer-Key-Topic-4-Subtraction-Facts-to-20-Use-Strategies-6.17\" width=\"125\" height=\"121\" \/><\/p>\n<p>Question 6.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-2693\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-Grade-1-Answer-Key-Topic-4-Subtraction-Facts-to-20-Use-Strategies-6.18.png\" alt=\"Envision Math Common Core Grade 1 Answer Key Topic 4 Subtraction Facts to 20 Use Strategies 6.18\" width=\"130\" height=\"120\" \/><br \/>\n17 \u2013 8 = __<br \/>\nAnswer: 9<\/p>\n<p>Explanation:<br \/>\n17 &#8211; 7 = 10<br \/>\n10 &#8211; 1 = 9<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-4216\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-Grade-1-Answer-Key-Topic-4-Subtraction-Facts-to-20-Use-Strategies-6.18-1.png\" alt=\"Envision-Math-Common-Core-Grade-1-Answer-Key-Topic-4-Subtraction-Facts-to-20-Use-Strategies-6.18\" width=\"130\" height=\"120\" \/><\/p>\n<p>Question 7.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-2694\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-Grade-1-Answer-Key-Topic-4-Subtraction-Facts-to-20-Use-Strategies-6.19.png\" alt=\"Envision Math Common Core Grade 1 Answer Key Topic 4 Subtraction Facts to 20 Use Strategies 6.19\" width=\"137\" height=\"121\" \/><br \/>\n15 \u2013 7 = __<br \/>\nAnswer: 8<\/p>\n<p>Explanation:<br \/>\n15 &#8211; 5 = 10<br \/>\n10 &#8211; 2 = 8<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-4217\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-Grade-1-Answer-Key-Topic-4-Subtraction-Facts-to-20-Use-Strategies-6.19-1.png\" alt=\"Envision-Math-Common-Core-Grade-1-Answer-Key-Topic-4-Subtraction-Facts-to-20-Use-Strategies-6.19\" width=\"137\" height=\"121\" \/><\/p>\n<p>Question 8.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-2695\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-Grade-1-Answer-Key-Topic-4-Subtraction-Facts-to-20-Use-Strategies-6.20.png\" alt=\"Envision Math Common Core Grade 1 Answer Key Topic 4 Subtraction Facts to 20 Use Strategies 6.20\" width=\"132\" height=\"122\" \/><br \/>\n14 \u2013 9 = __<br \/>\nAnswer: 5<\/p>\n<p>Explanation:<br \/>\n14 &#8211; 4 = 10<br \/>\n10 &#8211; 5 = 5<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-4218\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-Grade-1-Answer-Key-Topic-4-Subtraction-Facts-to-20-Use-Strategies-6.20-1.png\" alt=\"Envision-Math-Common-Core-Grade-1-Answer-Key-Topic-4-Subtraction-Facts-to-20-Use-Strategies-6.20\" width=\"132\" height=\"122\" \/><\/p>\n<p><img loading=\"lazy\" class=\"alignnone size-full wp-image-2696\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-Grade-1-Answer-Key-Topic-4-Subtraction-Facts-to-20-Use-Strategies-6.21.png\" alt=\"Envision Math Common Core Grade 1 Answer Key Topic 4 Subtraction Facts to 20 Use Strategies 6.21\" width=\"417\" height=\"102\" \/><br \/>\nShow your work. Draw counters in the ten-frames.<\/p>\n<p>Question 9.<br \/>\n<strong>Number Sense<\/strong><br \/>\nShow how you can make 10 to find 13 \u2013 6. 13 \u2013 6=<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-2697\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-Grade-1-Answer-Key-Topic-4-Subtraction-Facts-to-20-Use-Strategies-6.22.png\" alt=\"Envision Math Common Core Grade 1 Answer Key Topic 4 Subtraction Facts to 20 Use Strategies 6.22\" width=\"256\" height=\"73\" \/><br \/>\nAnswer:<br \/>\n13 &#8211; 3 = 10<br \/>\n10 &#8211; 3 = 7<br \/>\nThus 13 &#8211; 6 = 7<\/p>\n<p><strong>Problem Solving<\/strong><\/p>\n<p>Solve each problem.<\/p>\n<p>Question 10.<br \/>\n<strong>Use Tools<\/strong><br \/>\nKyle bakes 12 muffins. His friends eat 6 muffins. How many muffins are left? Make 10 to subtract.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-2698\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-Grade-1-Answer-Key-Topic-4-Subtraction-Facts-to-20-Use-Strategies-6.23.png\" alt=\"Envision Math Common Core Grade 1 Answer Key Topic 4 Subtraction Facts to 20 Use Strategies 6.23\" width=\"485\" height=\"231\" \/><br \/>\nAnswer:<br \/>\nGiven,<br \/>\nKyle bakes 12 muffins. His friends eat 6 muffins.<br \/>\n12 &#8211; 2 = 10<br \/>\n10 &#8211; 4 = 6 muffins<br \/>\nThus 6 muffins are left.<\/p>\n<p>Question 11.<br \/>\n<strong>Higher Order Thinking<\/strong><br \/>\nZak makes 10 to solve 12 \u2013 5. He changes the problem to 12 &#8211; 2 &#8211; 3. How does Zak make 10?<br \/>\nAnswer:<br \/>\n12 &#8211; 2 = 10<br \/>\n10 &#8211; 3 = 7<br \/>\nThus 12 &#8211; 5 = 7<\/p>\n<p>Question 12.<br \/>\n<strong>Assessment Practice<\/strong> Draw lines. Match each pair of ten-frames with the equations that show how to subtract by making 10.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-2699\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-Grade-1-Answer-Key-Topic-4-Subtraction-Facts-to-20-Use-Strategies-6.24.png\" alt=\"Envision Math Common Core Grade 1 Answer Key Topic 4 Subtraction Facts to 20 Use Strategies 6.24\" width=\"660\" height=\"169\" \/><br \/>\nAnswer:<\/p>\n<h3>Lesson 4.3 Continue to Make 10 to Subtract<\/h3>\n<p><strong>Solve &amp; Share<\/strong><br \/>\nEmily counts on to find 13 \u2013 6. She makes 10 while counting. Use the ten-frames to explain what Emily could have done.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-2700\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-Grade-1-Answer-Key-Topic-4-Subtraction-Facts-to-20-Use-Strategies-6.25.png\" alt=\"Envision Math Common Core Grade 1 Answer Key Topic 4 Subtraction Facts to 20 Use Strategies 6.25\" width=\"775\" height=\"447\" \/><br \/>\nAnswer: 7<\/p>\n<p><strong>Visual Learning Bridge<\/strong><br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-2701\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-Grade-1-Answer-Key-Topic-4-Subtraction-Facts-to-20-Use-Strategies-6.26.png\" alt=\"Envision Math Common Core Grade 1 Answer Key Topic 4 Subtraction Facts to 20 Use Strategies 6.26\" width=\"783\" height=\"263\" \/><\/p>\n<p><strong>Convince Me!<\/strong><br \/>\nHow can counting on to make 10 help you find 15 \u2013 8?<\/p>\n<p><strong>Guided Practice<\/strong><br \/>\nSubtract. Count on to make 10. Complete each fact to find the difference.<\/p>\n<p>Question 1.<br \/>\n13 &#8211; 9 = ?<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-2702\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-Grade-1-Answer-Key-Topic-4-Subtraction-Facts-to-20-Use-Strategies-6.27.png\" alt=\"Envision Math Common Core Grade 1 Answer Key Topic 4 Subtraction Facts to 20 Use Strategies 6.27\" width=\"461\" height=\"188\" \/><br \/>\nAnswer:<br \/>\n9 + 1 = 10<br \/>\n10 + 3 = 13<br \/>\n9 + 4 = 13<br \/>\n13 &#8211; 9 = 4<\/p>\n<p><strong>Independent Practice<\/strong><\/p>\n<p>Subtract. Count on to make 10. Show your work, and complete the facts.<\/p>\n<p>Question 2.<br \/>\n12 &#8211; 8 = ?<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-2703\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-Grade-1-Answer-Key-Topic-4-Subtraction-Facts-to-20-Use-Strategies-6.28.png\" alt=\"Envision Math Common Core Grade 1 Answer Key Topic 4 Subtraction Facts to 20 Use Strategies 6.28\" width=\"307\" height=\"170\" \/><br \/>\nAnswer:<br \/>\n8 + 2 = 10<br \/>\n10 + 2 = 12<br \/>\n8 + 4 = 12, so 12 &#8211; 8 = 4<\/p>\n<p>Question 3.<br \/>\n15 \u2013 7 = ?<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-2704\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-Grade-1-Answer-Key-Topic-4-Subtraction-Facts-to-20-Use-Strategies-6.29.png\" alt=\"Envision Math Common Core Grade 1 Answer Key Topic 4 Subtraction Facts to 20 Use Strategies 6.29\" width=\"319\" height=\"174\" \/><br \/>\nAnswer:<br \/>\n7 + 3 = 10<br \/>\n10 + 5 = 15<br \/>\n7 + 8 = 15, so 15 &#8211; 7 = 8<\/p>\n<p>Question 4.<br \/>\n14 &#8211; 5 = ___<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-2705\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-Grade-1-Answer-Key-Topic-4-Subtraction-Facts-to-20-Use-Strategies-6.30.png\" alt=\"Envision Math Common Core Grade 1 Answer Key Topic 4 Subtraction Facts to 20 Use Strategies 6.30\" width=\"307\" height=\"71\" \/><br \/>\nAnswer:<br \/>\n5 + 5 = 10<br \/>\n10 + 4 = 14<br \/>\n5 + 9 = 14, so 14 &#8211; 5 = 9<\/p>\n<p>Question 5.<br \/>\n16 \u2013 9 = __<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-2706\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-Grade-1-Answer-Key-Topic-4-Subtraction-Facts-to-20-Use-Strategies-6.31.png\" alt=\"Envision Math Common Core Grade 1 Answer Key Topic 4 Subtraction Facts to 20 Use Strategies 6.31\" width=\"310\" height=\"67\" \/><br \/>\nAnswer:<br \/>\n9 + 1 = 10<br \/>\n10 + 6 = 16<br \/>\n9 + 7 = 16, so 16 &#8211; 9 = 7<\/p>\n<p>Question 6.<br \/>\n<strong>enVision<\/strong>\u00ae STEM<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-2707\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-Grade-1-Answer-Key-Topic-4-Subtraction-Facts-to-20-Use-Strategies-6.32.png\" alt=\"Envision Math Common Core Grade 1 Answer Key Topic 4 Subtraction Facts to 20 Use Strategies 6.32\" width=\"733\" height=\"114\" \/><br \/>\nAnswer:<br \/>\n5 + 5 = 10<br \/>\n10 + 3 = 13<br \/>\n5 + 8 = 13, so 13 &#8211; 5 = 8 sunrises<\/p>\n<p>Solve the problems.<\/p>\n<p>Question 7.<br \/>\nMake Sense<br \/>\nSage has 13 stickers. She gives 7 to her brother. How many stickers does Sage have left?<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-2708\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-Grade-1-Answer-Key-Topic-4-Subtraction-Facts-to-20-Use-Strategies-6.33.png\" alt=\"Envision Math Common Core Grade 1 Answer Key Topic 4 Subtraction Facts to 20 Use Strategies 6.33\" width=\"228\" height=\"130\" \/><br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-2709\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-Grade-1-Answer-Key-Topic-4-Subtraction-Facts-to-20-Use-Strategies-6.34.png\" alt=\"Envision Math Common Core Grade 1 Answer Key Topic 4 Subtraction Facts to 20 Use Strategies 6.34\" width=\"368\" height=\"232\" \/><br \/>\nAnswer:<br \/>\nGiven,<br \/>\nSage has 13 stickers. She gives 7 to her brother.<br \/>\n13 &#8211; 7 = 6<br \/>\nSage has 6 stickers left.<\/p>\n<p>Question 8.<br \/>\n<strong>Higher Order Thinking<\/strong><br \/>\nColin has 12 toys. He gives 9 toys away. How many toys does Colin have left? Make 10 to solve. Show your work.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-2710\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-Grade-1-Answer-Key-Topic-4-Subtraction-Facts-to-20-Use-Strategies-6.35.png\" alt=\"Envision Math Common Core Grade 1 Answer Key Topic 4 Subtraction Facts to 20 Use Strategies 6.35\" width=\"209\" height=\"75\" \/><br \/>\nAnswer:<br \/>\nGiven,<br \/>\nColin has 12 toys. He gives 9 toys away.<br \/>\n9 + 1 = 10<br \/>\n10 + 2 = 12<br \/>\n9 + 3 = 12, so 12 &#8211; 9 = 3<br \/>\nThus Colin has 3 toys left.<\/p>\n<p>Question 9.<br \/>\n<strong>Assessment Practice<\/strong><br \/>\nWhich equations show how to make 10 to solve 16 \u2013 7 = ?<br \/>\nA. 16 \u2013 10 = 6<br \/>\nB. 7 + 3 = 10, 10 + 6 = 16, 3 + 6 = 9<br \/>\nC. 7 + 3 = 10, 10 + 7 = 17, 3 + 7 = 10<br \/>\nD. 10 + 7 = 17<br \/>\nAnswer: 7 + 3 = 10, 10 + 6 = 16, 3 + 6 = 9<\/p>\n<h3>Lesson 4.4 Fact Families<\/h3>\n<p><strong>Solve &amp; Share<\/strong><\/p>\n<p>Write 2 addition and 2 subtraction facts. Use the numbers 8, 9, and 17. Use cubes to help you.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-2711\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-Grade-1-Answer-Key-Topic-4-Subtraction-Facts-to-20-Use-Strategies-6.36.png\" alt=\"Envision Math Common Core Grade 1 Answer Key Topic 4 Subtraction Facts to 20 Use Strategies 6.36\" width=\"567\" height=\"499\" \/><\/p>\n<p><strong>Visual Learning Bridge<\/strong><\/p>\n<p><img loading=\"lazy\" class=\"alignnone size-full wp-image-2712\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-Grade-1-Answer-Key-Topic-4-Subtraction-Facts-to-20-Use-Strategies-6.38.png\" alt=\"Envision Math Common Core Grade 1 Answer Key Topic 4 Subtraction Facts to 20 Use Strategies 6.38\" width=\"786\" height=\"245\" \/><\/p>\n<p><strong>Convince Me!<\/strong><br \/>\nHow are 15 \u2013 6 = 9 and 15 \u2013 9 = 6 related?<\/p>\n<p><strong>Guided Practice<\/strong><br \/>\nWrite the fact family for each model.<\/p>\n<p>Question 1.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-2713\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-Grade-1-Answer-Key-Topic-4-Subtraction-Facts-to-20-Use-Strategies-6.39.png\" alt=\"Envision Math Common Core Grade 1 Answer Key Topic 4 Subtraction Facts to 20 Use Strategies 6.39\" width=\"194\" height=\"263\" \/><\/p>\n<p>Question 2.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-2714\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-Grade-1-Answer-Key-Topic-4-Subtraction-Facts-to-20-Use-Strategies-6.40.png\" alt=\"Envision Math Common Core Grade 1 Answer Key Topic 4 Subtraction Facts to 20 Use Strategies 6.40\" width=\"195\" height=\"263\" \/><br \/>\nAnswer:<br \/>\n16 = 9 + 7<br \/>\n16 = 7 + 9<br \/>\n9 = 16 &#8211; 7<br \/>\n7 = 16 &#8211; 9<\/p>\n<p><strong>Independent Practice<\/strong><\/p>\n<p>Write the fact family for each model.<\/p>\n<p>Question 3.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-2715\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-Grade-1-Answer-Key-Topic-4-Subtraction-Facts-to-20-Use-Strategies-6.41.png\" alt=\"Envision Math Common Core Grade 1 Answer Key Topic 4 Subtraction Facts to 20 Use Strategies 6.41\" width=\"193\" height=\"263\" \/><br \/>\nAnswer:<br \/>\n17 = 9 + 8<br \/>\n17 = 8 + 9<br \/>\n9 = 17 &#8211; 8<br \/>\n8 = 17 &#8211; 9<\/p>\n<p>Question 4.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-2645\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-1st-Grade-Answers-Topic-4-Subtraction-Facts-to-20-Use-Strategies-6.42.png\" alt=\"Envision Math Common Core 1st Grade Answers Topic 4 Subtraction Facts to 20 Use Strategies 6.42\" width=\"195\" height=\"266\" \/><br \/>\nAnswer:<br \/>\n13 = 7 + 6<br \/>\n13 = 6 + 7<br \/>\n6 = 13 &#8211; 7<br \/>\n7 = 13 &#8211; 6<\/p>\n<p>Question 5.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-2646\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-1st-Grade-Answers-Topic-4-Subtraction-Facts-to-20-Use-Strategies-6.43.png\" alt=\"Envision Math Common Core 1st Grade Answers Topic 4 Subtraction Facts to 20 Use Strategies 6.43\" width=\"192\" height=\"265\" \/><br \/>\nAnswer:<br \/>\n12 = 4 + 8<br \/>\n12 = 8 + 4<br \/>\n4 = 12 &#8211; 8<br \/>\n8 = 12 &#8211; 4<\/p>\n<p>Question 6.<br \/>\n<strong>Number Sense<\/strong><br \/>\nAre the following equations a fact family? Explain your answer.<br \/>\n9 + 5 = 14 ______________<br \/>\n15 &#8211; 5 = 10 ______________<br \/>\n4 + 4 = 8 ______________<br \/>\n15 = 6 + 9 _____________<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-2647\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-1st-Grade-Answers-Topic-4-Subtraction-Facts-to-20-Use-Strategies-6.44.png\" alt=\"Envision Math Common Core 1st Grade Answers Topic 4 Subtraction Facts to 20 Use Strategies 6.44\" width=\"243\" height=\"235\" \/><\/p>\n<p>Answer:<br \/>\nNo, the equations do not have the same whole and same parts. They use different numbers.<\/p>\n<p><strong>Problem Solving<\/strong><br \/>\nSolve the problems.<\/p>\n<p>Question 7.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-2648\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-1st-Grade-Answers-Topic-4-Subtraction-Facts-to-20-Use-Strategies-6.45.png\" alt=\"Envision Math Common Core 1st Grade Answers Topic 4 Subtraction Facts to 20 Use Strategies 6.45\" width=\"589\" height=\"177\" \/><br \/>\nAnswer:<br \/>\nThe order of the facts may vary.<br \/>\n13 = 9 + 4<br \/>\n13 = 4 + 9<br \/>\n4 = 13 &#8211; 9<br \/>\n9 = 13 &#8211; 4<\/p>\n<p>Question 8.<br \/>\n<strong>Higher Order Thinking<\/strong><br \/>\nTanya has 8 stickers. Miguel gives her 5 more. How many stickers does Tanya have in all? Write an equation to solve the problem. Then complete the fact family.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-2649\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-1st-Grade-Answers-Topic-4-Subtraction-Facts-to-20-Use-Strategies-6.46.png\" alt=\"Envision Math Common Core 1st Grade Answers Topic 4 Subtraction Facts to 20 Use Strategies 6.46\" width=\"268\" height=\"161\" \/><br \/>\nAnswer:<br \/>\n8 + 5 = 13<br \/>\n5 + 8 = 13<br \/>\n13 &#8211; 5 = 8<br \/>\n13 &#8211; 8 = 5<\/p>\n<p>Question 9.<br \/>\n<strong>Assessment Practice<\/strong><br \/>\nWrite a fact family to match the picture of the yellow robots and green robots.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-2650\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-1st-Grade-Answers-Topic-4-Subtraction-Facts-to-20-Use-Strategies-6.47.png\" alt=\"Envision Math Common Core 1st Grade Answers Topic 4 Subtraction Facts to 20 Use Strategies 6.47\" width=\"380\" height=\"239\" \/><br \/>\nAnswer:<br \/>\n8 + 9 = 17<br \/>\n9 + 8 = 17<br \/>\n17 &#8211; 8 = 9<br \/>\n17 &#8211; 9 = 8<\/p>\n<h3>Lesson 4.5 Use Addition to Subtract<\/h3>\n<p><strong>Solve &amp; Share<\/strong><\/p>\n<p>12 \u2013 9 = ? How can a related fact help you find 12 &#8211; 9? Write the related addition and subtraction facts. You can use counters to help.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-2651\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-1st-Grade-Answers-Topic-4-Subtraction-Facts-to-20-Use-Strategies-6.48.png\" alt=\"Envision Math Common Core 1st Grade Answers Topic 4 Subtraction Facts to 20 Use Strategies 6.48\" width=\"103\" height=\"313\" \/><br \/>\n___ + __ = _____\u00a0 \u00a0 \u00a0 \u00a0 \u00a0____ + ___ = ______<br \/>\nAnswer:<br \/>\n9 + 1 &#8211; 10<br \/>\n10 + 2 = 12<br \/>\n12 &#8211; 3 = 9<br \/>\n9 + 3 = 12<br \/>\nSo, 12 &#8211; 9 = 3<\/p>\n<p><strong>Visual Learning Bridge<\/strong><br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-2652\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-1st-Grade-Answers-Topic-4-Subtraction-Facts-to-20-Use-Strategies-6.49.png\" alt=\"Envision Math Common Core 1st Grade Answers Topic 4 Subtraction Facts to 20 Use Strategies 6.49\" width=\"789\" height=\"247\" \/><\/p>\n<p><strong>Convince Me!<\/strong><br \/>\nHow could you use addition to solve 16 \u2013 9?<\/p>\n<p><strong>Guided Practice<\/strong><\/p>\n<p>Complete each model. Then complete the equations.<\/p>\n<p>Question 1.<br \/>\n14 &#8211; 8 = ?<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-2653\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-1st-Grade-Answers-Topic-4-Subtraction-Facts-to-20-Use-Strategies-6.50.png\" alt=\"Envision Math Common Core 1st Grade Answers Topic 4 Subtraction Facts to 20 Use Strategies 6.50\" width=\"185\" height=\"229\" \/><\/p>\n<p>Question 2.<br \/>\n17 \u2013 9 = ?<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-2654\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-1st-Grade-Answers-Topic-4-Subtraction-Facts-to-20-Use-Strategies-6.51.png\" alt=\"Envision Math Common Core 1st Grade Answers Topic 4 Subtraction Facts to 20 Use Strategies 6.51\" width=\"176\" height=\"165\" \/><br \/>\n9 + __ = 17<br \/>\n17 &#8211; 9 = ___<br \/>\nAnswer:<br \/>\n9 + 8 = 17<br \/>\n17 &#8211; 9 = 8<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-4219\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-1st-Grade-Answers-Topic-4-Subtraction-Facts-to-20-Use-Strategies-6.51-1.png\" alt=\"Envision-Math-Common-Core-1st-Grade-Answers-Topic-4-Subtraction-Facts-to-20-Use-Strategies-6.51\" width=\"176\" height=\"165\" \/><\/p>\n<p><strong>Independent Practice<\/strong><\/p>\n<p>Complete each model. Then complete the equations.<\/p>\n<p>Question 3.<br \/>\n13 \u2013 9 = ?<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-2655\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-1st-Grade-Answers-Topic-4-Subtraction-Facts-to-20-Use-Strategies-7.1.png\" alt=\"Envision Math Common Core 1st Grade Answers Topic 4 Subtraction Facts to 20 Use Strategies 7.1\" width=\"171\" height=\"175\" \/><br \/>\n9 + ___ = 13<br \/>\n13 &#8211; 9 = ____<\/p>\n<p>Answer:<br \/>\n9 + 4 = 13<br \/>\n13 &#8211; 9 = 4<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-4220\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-1st-Grade-Answers-Topic-4-Subtraction-Facts-to-20-Use-Strategies-7.1-1.png\" alt=\"Envision-Math-Common-Core-1st-Grade-Answers-Topic-4-Subtraction-Facts-to-20-Use-Strategies-7.1\" width=\"171\" height=\"175\" \/><\/p>\n<p>Question 4.<br \/>\n20 \u2013 10 = ?<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-2656\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-1st-Grade-Answers-Topic-4-Subtraction-Facts-to-20-Use-Strategies-7.2.png\" alt=\"Envision Math Common Core 1st Grade Answers Topic 4 Subtraction Facts to 20 Use Strategies 7.2\" width=\"182\" height=\"169\" \/><br \/>\n10 + __ = 20<br \/>\n20 &#8211; 10 = ___<\/p>\n<p>Answer:<br \/>\n10 + 10 = 20<br \/>\n20 &#8211; 10 = 10<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-4221\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-1st-Grade-Answers-Topic-4-Subtraction-Facts-to-20-Use-Strategies-7.2-1.png\" alt=\"Envision-Math-Common-Core-1st-Grade-Answers-Topic-4-Subtraction-Facts-to-20-Use-Strategies-7.2\" width=\"182\" height=\"169\" \/><\/p>\n<p>Question 5.<br \/>\n15 &#8211; 7 = ?<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-2657\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-1st-Grade-Answers-Topic-4-Subtraction-Facts-to-20-Use-Strategies-7.3.png\" alt=\"Envision Math Common Core 1st Grade Answers Topic 4 Subtraction Facts to 20 Use Strategies 7.3\" width=\"177\" height=\"166\" \/><br \/>\n7 + __ = 15<br \/>\n15 &#8211; 7 = __<\/p>\n<p>Answer:<br \/>\n7 + 8 = 15<br \/>\n15 &#8211; 7 = 8<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-4222\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-1st-Grade-Answers-Topic-4-Subtraction-Facts-to-20-Use-Strategies-7.3-1.png\" alt=\"Envision-Math-Common-Core-1st-Grade-Answers-Topic-4-Subtraction-Facts-to-20-Use-Strategies-7.3\" width=\"177\" height=\"166\" \/><\/p>\n<p><img loading=\"lazy\" class=\"alignnone size-full wp-image-2658\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-1st-Grade-Answers-Topic-4-Subtraction-Facts-to-20-Use-Strategies-7.4.png\" alt=\"Envision Math Common Core 1st Grade Answers Topic 4 Subtraction Facts to 20 Use Strategies 7.4\" width=\"497\" height=\"104\" \/><\/p>\n<p>Question 6.<br \/>\n<strong>Algebra<\/strong><br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-2659\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-1st-Grade-Answers-Topic-4-Subtraction-Facts-to-20-Use-Strategies-7.5.png\" alt=\"Envision Math Common Core 1st Grade Answers Topic 4 Subtraction Facts to 20 Use Strategies 7.5\" width=\"239\" height=\"103\" \/><br \/>\nAnswer:<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-4165\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-1st-Grade-Answers-Topic-4-Subtraction-Facts-to-20-Use-Strategies-7.5-1.png\" alt=\"Envision-Math-Common-Core-1st-Grade-Answers-Topic-4-Subtraction-Facts-to-20-Use-Strategies-7.5\" width=\"239\" height=\"103\" \/><\/p>\n<p>Question 7.<br \/>\n<strong>Algebra<\/strong><br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-2660\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-1st-Grade-Answers-Topic-4-Subtraction-Facts-to-20-Use-Strategies-7.6.png\" alt=\"Envision Math Common Core 1st Grade Answers Topic 4 Subtraction Facts to 20 Use Strategies 7.6\" width=\"236\" height=\"112\" \/><br \/>\nAnswer:<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-4166\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-1st-Grade-Answers-Topic-4-Subtraction-Facts-to-20-Use-Strategies-7.6-1.png\" alt=\"Envision-Math-Common-Core-1st-Grade-Answers-Topic-4-Subtraction-Facts-to-20-Use-Strategies-7.6\" width=\"236\" height=\"112\" \/><\/p>\n<p><strong>Problem Solving<\/strong><\/p>\n<p>Solve each problem. Write a related addition fact and subtraction fact to help you.<\/p>\n<p>Question 8.<br \/>\n<strong>Generalize<\/strong><br \/>\nThere are 17 robot parts. Fred uses some of the parts. Now there are 8 left. How many parts did Fred use?<br \/>\n___ + ___ = ___<br \/>\n___ &#8211; ___ = ___ ___ parts<br \/>\nAnswer:<br \/>\nGiven,<br \/>\nThere are 17 robot parts. Fred uses some of the parts. Now there are 8 left.<br \/>\n8 + 9 = 17<br \/>\n17 &#8211; 9 = 8<\/p>\n<p>Question 9.<br \/>\n<strong>Generalize<\/strong><br \/>\nMaria invites 10 friends to her party. 3 cannot come. How many friends will be at Maria&#8217;s party?<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-2661\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-1st-Grade-Answers-Topic-4-Subtraction-Facts-to-20-Use-Strategies-7.7.png\" alt=\"Envision Math Common Core 1st Grade Answers Topic 4 Subtraction Facts to 20 Use Strategies 7.7\" width=\"395\" height=\"195\" \/><br \/>\nAnswer:<br \/>\nMaria invites 10 friends to her party. 3 cannot come.<br \/>\n7 + 3 = 10<br \/>\n10 &#8211; 3 = 7<\/p>\n<p>Question 10.<br \/>\n<strong>Higher Order Thinking<\/strong><br \/>\nWrite a subtraction equation with 11. Then write a related addition fact you could use to solve it.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-2662\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-1st-Grade-Answers-Topic-4-Subtraction-Facts-to-20-Use-Strategies-7.8.png\" alt=\"Envision Math Common Core 1st Grade Answers Topic 4 Subtraction Facts to 20 Use Strategies 7.8\" width=\"211\" height=\"85\" \/><br \/>\nAnswer:<br \/>\n7 + 4 = 11<br \/>\n11 &#8211; 7 = 4<\/p>\n<p>Question 11.<br \/>\n<strong>Assessment Practice<\/strong><br \/>\nWrite an addition fact that will help you solve 13 &#8211; 7 = ?.<br \/>\n___ + ___ = ___<br \/>\nAnswer:<br \/>\n6 + 7 = 13<\/p>\n<h3>Lesson 4.6 Continue to Use Addition to Subtract<\/h3>\n<p><strong>Solve &amp; Share<\/strong><\/p>\n<p>Complete the subtraction facts. Draw lines from the subtraction facts to the addition facts that can help you. How are the subtraction facts and the addition facts alike?<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-2663\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-1st-Grade-Answers-Topic-4-Subtraction-Facts-to-20-Use-Strategies-7.9.png\" alt=\"Envision Math Common Core 1st Grade Answers Topic 4 Subtraction Facts to 20 Use Strategies 7.9\" width=\"542\" height=\"425\" \/><br \/>\nAnswer:<br \/>\n<img loading=\"lazy\" class=\"alignnone size-medium wp-image-4167\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-1st-Grade-Answers-Topic-4-Subtraction-Facts-to-20-Use-Strategies-7.9-1-300x235.png\" alt=\"Envision-Math-Common-Core-1st-Grade-Answers-Topic-4-Subtraction-Facts-to-20-Use-Strategies-7.9\" width=\"300\" height=\"235\" \/><\/p>\n<p><strong>Visual Learning Bridge<\/strong><br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-2664\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-1st-Grade-Answers-Topic-4-Subtraction-Facts-to-20-Use-Strategies-7.10.png\" alt=\"Envision Math Common Core 1st Grade Answers Topic 4 Subtraction Facts to 20 Use Strategies 7.10\" width=\"779\" height=\"234\" \/><\/p>\n<p><strong>Convince Me!<\/strong><br \/>\nHow does the fact 6 + 9 = 15 help you solve 15 \u2013 6?<\/p>\n<p><strong>Guided Practice<\/strong><br \/>\nComplete the addition fact. Then solve the related subtraction fact.<\/p>\n<p>Question 1.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-2665\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-1st-Grade-Answers-Topic-4-Subtraction-Facts-to-20-Use-Strategies-7.11.png\" alt=\"Envision Math Common Core 1st Grade Answers Topic 4 Subtraction Facts to 20 Use Strategies 7.11\" width=\"191\" height=\"134\" \/><\/p>\n<p>Question 2.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-2666\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-1st-Grade-Answers-Topic-4-Subtraction-Facts-to-20-Use-Strategies-7.12.png\" alt=\"Envision Math Common Core 1st Grade Answers Topic 4 Subtraction Facts to 20 Use Strategies 7.12\" width=\"203\" height=\"130\" \/><br \/>\nAnswer:<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-4168\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-1st-Grade-Answers-Topic-4-Subtraction-Facts-to-20-Use-Strategies-7.12-1.png\" alt=\"Envision-Math-Common-Core-1st-Grade-Answers-Topic-4-Subtraction-Facts-to-20-Use-Strategies-7.12\" width=\"203\" height=\"130\" \/><\/p>\n<p>Question 3.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-2667\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-1st-Grade-Answers-Topic-4-Subtraction-Facts-to-20-Use-Strategies-7.13.png\" alt=\"Envision Math Common Core 1st Grade Answers Topic 4 Subtraction Facts to 20 Use Strategies 7.13\" width=\"185\" height=\"130\" \/><br \/>\nAnswer:<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-4169\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-1st-Grade-Answers-Topic-4-Subtraction-Facts-to-20-Use-Strategies-7.13-1.png\" alt=\"Envision-Math-Common-Core-1st-Grade-Answers-Topic-4-Subtraction-Facts-to-20-Use-Strategies-7.13\" width=\"185\" height=\"130\" \/><\/p>\n<p>Question 4.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-2668\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-1st-Grade-Answers-Topic-4-Subtraction-Facts-to-20-Use-Strategies-7.14.png\" alt=\"Envision Math Common Core 1st Grade Answers Topic 4 Subtraction Facts to 20 Use Strategies 7.14\" width=\"188\" height=\"123\" \/><br \/>\nAnswer:<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-4170\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-1st-Grade-Answers-Topic-4-Subtraction-Facts-to-20-Use-Strategies-7.14-1.png\" alt=\"Envision-Math-Common-Core-1st-Grade-Answers-Topic-4-Subtraction-Facts-to-20-Use-Strategies-7.14\" width=\"188\" height=\"123\" \/><\/p>\n<p><strong>Independent Practice<\/strong><\/p>\n<p>Think addition to solve each subtraction fact.<\/p>\n<p>Question 5.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-2669\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-1st-Grade-Answers-Topic-4-Subtraction-Facts-to-20-Use-Strategies-7.15.png\" alt=\"Envision Math Common Core 1st Grade Answers Topic 4 Subtraction Facts to 20 Use Strategies 7.15\" width=\"71\" height=\"118\" \/><br \/>\nAnswer:<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-4171\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-1st-Grade-Answers-Topic-4-Subtraction-Facts-to-20-Use-Strategies-7.15-1.png\" alt=\"Envision-Math-Common-Core-1st-Grade-Answers-Topic-4-Subtraction-Facts-to-20-Use-Strategies-7.15\" width=\"71\" height=\"118\" \/><\/p>\n<p>Question 6.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-2670\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-1st-Grade-Answers-Topic-4-Subtraction-Facts-to-20-Use-Strategies-7.16.png\" alt=\"Envision Math Common Core 1st Grade Answers Topic 4 Subtraction Facts to 20 Use Strategies 7.16\" width=\"58\" height=\"112\" \/><br \/>\nAnswer:<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-4172\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-1st-Grade-Answers-Topic-4-Subtraction-Facts-to-20-Use-Strategies-7.16-1.png\" alt=\"Envision-Math-Common-Core-1st-Grade-Answers-Topic-4-Subtraction-Facts-to-20-Use-Strategies-7.16\" width=\"58\" height=\"112\" \/><\/p>\n<p>Question 7.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-2717\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-Grade-1-Answers-Topic-4-Subtraction-Facts-to-20-Use-Strategies-7.17.png\" alt=\"Envision Math Common Core Grade 1 Answers Topic 4 Subtraction Facts to 20 Use Strategies 7.17\" width=\"66\" height=\"116\" \/><br \/>\nAnswer:<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-4173\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-Grade-1-Answers-Topic-4-Subtraction-Facts-to-20-Use-Strategies-7.17-1.png\" alt=\"Envision-Math-Common-Core-Grade-1-Answers-Topic-4-Subtraction-Facts-to-20-Use-Strategies-7.17\" width=\"66\" height=\"116\" \/><\/p>\n<p>Question 8.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-2718\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-Grade-1-Answers-Topic-4-Subtraction-Facts-to-20-Use-Strategies-7.18.png\" alt=\"Envision Math Common Core Grade 1 Answers Topic 4 Subtraction Facts to 20 Use Strategies 7.18\" width=\"67\" height=\"115\" \/><br \/>\nAnswer:<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-4174\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-Grade-1-Answers-Topic-4-Subtraction-Facts-to-20-Use-Strategies-7.18-1.png\" alt=\"Envision-Math-Common-Core-Grade-1-Answers-Topic-4-Subtraction-Facts-to-20-Use-Strategies-7.18\" width=\"67\" height=\"115\" \/><\/p>\n<p>Question 9.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-2719\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-Grade-1-Answers-Topic-4-Subtraction-Facts-to-20-Use-Strategies-7.19.png\" alt=\"Envision Math Common Core Grade 1 Answers Topic 4 Subtraction Facts to 20 Use Strategies 7.19\" width=\"67\" height=\"107\" \/><br \/>\nAnswer:<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-4175\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-Grade-1-Answers-Topic-4-Subtraction-Facts-to-20-Use-Strategies-7.19-1.png\" alt=\"Envision-Math-Common-Core-Grade-1-Answers-Topic-4-Subtraction-Facts-to-20-Use-Strategies-7.19\" width=\"67\" height=\"107\" \/><\/p>\n<p>Question 10.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-2716\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-1st-Grade-Answers-Topic-4-Subtraction-Facts-to-20-Use-Strategies-7.20.png\" alt=\"Envision Math Common Core 1st Grade Answers Topic 4 Subtraction Facts to 20 Use Strategies 7.20\" width=\"53\" height=\"104\" \/><br \/>\nAnswer:<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-4184\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-1st-Grade-Answers-Topic-4-Subtraction-Facts-to-20-Use-Strategies-7.20-1.png\" alt=\"Envision-Math-Common-Core-1st-Grade-Answers-Topic-4-Subtraction-Facts-to-20-Use-Strategies-7.20\" width=\"53\" height=\"104\" \/><\/p>\n<p>Question 11.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-2720\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-Grade-1-Answers-Topic-4-Subtraction-Facts-to-20-Use-Strategies-7.21.png\" alt=\"Envision Math Common Core Grade 1 Answers Topic 4 Subtraction Facts to 20 Use Strategies 7.21\" width=\"66\" height=\"108\" \/><br \/>\nAnswer:<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-4185\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-Grade-1-Answers-Topic-4-Subtraction-Facts-to-20-Use-Strategies-7.21-1.png\" alt=\"Envision-Math-Common-Core-Grade-1-Answers-Topic-4-Subtraction-Facts-to-20-Use-Strategies-7.21\" width=\"66\" height=\"108\" \/><\/p>\n<p>Question 12.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-2721\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-Grade-1-Answers-Topic-4-Subtraction-Facts-to-20-Use-Strategies-7.22.png\" alt=\"Envision Math Common Core Grade 1 Answers Topic 4 Subtraction Facts to 20 Use Strategies 7.22\" width=\"55\" height=\"108\" \/><br \/>\nAnswer:<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-4186\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-Grade-1-Answers-Topic-4-Subtraction-Facts-to-20-Use-Strategies-7.22-1.png\" alt=\"Envision-Math-Common-Core-Grade-1-Answers-Topic-4-Subtraction-Facts-to-20-Use-Strategies-7.22\" width=\"55\" height=\"108\" \/><\/p>\n<p><img loading=\"lazy\" class=\"alignnone size-full wp-image-2722\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-Grade-1-Answers-Topic-4-Subtraction-Facts-to-20-Use-Strategies-7.23.png\" alt=\"Envision Math Common Core Grade 1 Answers Topic 4 Subtraction Facts to 20 Use Strategies 7.23\" width=\"575\" height=\"102\" \/><br \/>\nVocabulary Circle Yes or No to show whether or not the related facts are correct.<\/p>\n<p>Question 13.<br \/>\nIf 8 + 8 = 16, then 16 &#8211; 8 = 8.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-2723\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-Grade-1-Answers-Topic-4-Subtraction-Facts-to-20-Use-Strategies-7.24.png\" alt=\"Envision Math Common Core Grade 1 Answers Topic 4 Subtraction Facts to 20 Use Strategies 7.24\" width=\"111\" height=\"43\" \/><br \/>\nAnswer: Yes<\/p>\n<p>Question 14.<br \/>\nIf 7 + 6 = 13, then 16 \u2013 7 = 3.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-2724\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-Grade-1-Answers-Topic-4-Subtraction-Facts-to-20-Use-Strategies-7.25.png\" alt=\"Envision Math Common Core Grade 1 Answers Topic 4 Subtraction Facts to 20 Use Strategies 7.25\" width=\"140\" height=\"37\" \/><br \/>\nAnswer: No<\/p>\n<p><strong>Problem Solving<\/strong><\/p>\n<p>Solve each problem. Write a related subtraction fact and addition fact to help.<\/p>\n<p>Question 15.<br \/>\n<strong>Reasoning<\/strong><br \/>\nSam has some crayons. He finds 6 more. Now Sam has 13 crayons. How many crayons did Sam have before he found more?<br \/>\n___ + ___ = _____<br \/>\n___ &#8211; ___ = _____<br \/>\n____ crayons<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-2725\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-Grade-1-Answers-Topic-4-Subtraction-Facts-to-20-Use-Strategies-8.1.png\" alt=\"Envision Math Common Core Grade 1 Answers Topic 4 Subtraction Facts to 20 Use Strategies 8.1\" width=\"274\" height=\"241\" \/><br \/>\nAnswer:<br \/>\nGiven,<br \/>\nSam has some crayons. He finds 6 more. Now Sam has 13 crayons.<br \/>\n6 + 7 = 13<br \/>\n13 &#8211; 6 = 7<br \/>\nThus Sam have 7 crayons before he found more.<\/p>\n<p>Question 16.<br \/>\n<strong>Higher Order Thinking<\/strong><br \/>\nSolve 13 \u2013 4. Use pictures, numbers, or words to show how you solved it.<br \/>\nAnswer:<\/p>\n<p>Question 17.<br \/>\n<strong>Assessment Practice<\/strong><br \/>\nWhich related addition fact helps you solve 14 &#8211; 6 = ?<br \/>\nA. 8 + 8 = 16<br \/>\nB. 6+ 8 = 14<br \/>\nC. 7 + 7 = 14<br \/>\nD. 6 + 9 = 15<br \/>\nAnswer: B. 6+ 8 = 14<\/p>\n<h3>Lesson 4.7 Explain Subtraction Strategies<\/h3>\n<p>Choose a strategy to solve the problem. Jeff has 12 apples. He gives away 6 apples. How many apples are left? Use words, objects, or pictures to explain your work.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-2726\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-Grade-1-Answers-Topic-4-Subtraction-Facts-to-20-Use-Strategies-8.2.png\" alt=\"Envision Math Common Core Grade 1 Answers Topic 4 Subtraction Facts to 20 Use Strategies 8.2\" width=\"773\" height=\"419\" \/><br \/>\nAnswer:<br \/>\nGiven,<br \/>\nJeff has 12 apples. He gives away 6 apples.<br \/>\n12 &#8211; 6 = 6<br \/>\nThus 6 apples are left.<\/p>\n<p><strong>Visual Learning Bridge<\/strong><br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-2727\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-Grade-1-Answers-Topic-4-Subtraction-Facts-to-20-Use-Strategies-8.3.png\" alt=\"Envision Math Common Core Grade 1 Answers Topic 4 Subtraction Facts to 20 Use Strategies 8.3\" width=\"792\" height=\"235\" \/><\/p>\n<p><strong>Convince Me!<\/strong><br \/>\nUse the number line above. How can you count on to find 10 &#8211; 3?<\/p>\n<p><strong>Guided Practice<\/strong><\/p>\n<p>Find each difference. Be ready to tell how you solved.<\/p>\n<p>Question 1.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-2728\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-Grade-1-Answers-Topic-4-Subtraction-Facts-to-20-Use-Strategies-8.4.png\" alt=\"Envision Math Common Core Grade 1 Answers Topic 4 Subtraction Facts to 20 Use Strategies 8.4\" width=\"76\" height=\"107\" \/><\/p>\n<p>Question 2.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-2729\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-Grade-1-Answers-Topic-4-Subtraction-Facts-to-20-Use-Strategies-8.5.png\" alt=\"Envision Math Common Core Grade 1 Answers Topic 4 Subtraction Facts to 20 Use Strategies 8.5\" width=\"65\" height=\"106\" \/><br \/>\nAnswer:<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-4187\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-Grade-1-Answers-Topic-4-Subtraction-Facts-to-20-Use-Strategies-8.5-1.png\" alt=\"Envision-Math-Common-Core-Grade-1-Answers-Topic-4-Subtraction-Facts-to-20-Use-Strategies-8.5\" width=\"65\" height=\"106\" \/><\/p>\n<p>Question 3.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-2730\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-Grade-1-Answers-Topic-4-Subtraction-Facts-to-20-Use-Strategies-8.6.png\" alt=\"Envision Math Common Core Grade 1 Answers Topic 4 Subtraction Facts to 20 Use Strategies 8.6\" width=\"64\" height=\"103\" \/><br \/>\nAnswer:<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-4188\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-Grade-1-Answers-Topic-4-Subtraction-Facts-to-20-Use-Strategies-8.6-1.png\" alt=\"Envision-Math-Common-Core-Grade-1-Answers-Topic-4-Subtraction-Facts-to-20-Use-Strategies-8.6\" width=\"64\" height=\"103\" \/><\/p>\n<p>Question 4.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-2731\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-Grade-1-Answers-Topic-4-Subtraction-Facts-to-20-Use-Strategies-8.7.png\" alt=\"Envision Math Common Core Grade 1 Answers Topic 4 Subtraction Facts to 20 Use Strategies 8.7\" width=\"61\" height=\"103\" \/><br \/>\nAnswer:<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-4189\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-Grade-1-Answers-Topic-4-Subtraction-Facts-to-20-Use-Strategies-8.7-1.png\" alt=\"Envision-Math-Common-Core-Grade-1-Answers-Topic-4-Subtraction-Facts-to-20-Use-Strategies-8.7\" width=\"61\" height=\"103\" \/><\/p>\n<p><strong>Independent Practice<\/strong><\/p>\n<p>Choose a strategy to find each difference.<\/p>\n<p>Question 5.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-2732\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-Grade-1-Answers-Topic-4-Subtraction-Facts-to-20-Use-Strategies-8.8.png\" alt=\"Envision Math Common Core Grade 1 Answers Topic 4 Subtraction Facts to 20 Use Strategies 8.8\" width=\"71\" height=\"113\" \/><br \/>\nAnswer:<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-4190\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-Grade-1-Answers-Topic-4-Subtraction-Facts-to-20-Use-Strategies-8.8-1.png\" alt=\"Envision-Math-Common-Core-Grade-1-Answers-Topic-4-Subtraction-Facts-to-20-Use-Strategies-8.8\" width=\"71\" height=\"113\" \/><\/p>\n<p>Question 6.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-2733\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-Grade-1-Answers-Topic-4-Subtraction-Facts-to-20-Use-Strategies-8.9.png\" alt=\"Envision Math Common Core Grade 1 Answers Topic 4 Subtraction Facts to 20 Use Strategies 8.9\" width=\"78\" height=\"105\" \/><br \/>\nAnswer:<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-4191\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-Grade-1-Answers-Topic-4-Subtraction-Facts-to-20-Use-Strategies-8.9-1.png\" alt=\"Envision-Math-Common-Core-Grade-1-Answers-Topic-4-Subtraction-Facts-to-20-Use-Strategies-8.9\" width=\"78\" height=\"105\" \/><\/p>\n<p>Question 7.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-2734\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-Grade-1-Answers-Topic-4-Subtraction-Facts-to-20-Use-Strategies-8.10.png\" alt=\"Envision Math Common Core Grade 1 Answers Topic 4 Subtraction Facts to 20 Use Strategies 8.10\" width=\"71\" height=\"109\" \/><br \/>\nAnswer:<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-4192\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-Grade-1-Answers-Topic-4-Subtraction-Facts-to-20-Use-Strategies-8.10-1.png\" alt=\"Envision-Math-Common-Core-Grade-1-Answers-Topic-4-Subtraction-Facts-to-20-Use-Strategies-8.10\" width=\"71\" height=\"109\" \/><\/p>\n<p>Question 8.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-2735\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-Grade-1-Answers-Topic-4-Subtraction-Facts-to-20-Use-Strategies-8.11.png\" alt=\"Envision Math Common Core Grade 1 Answers Topic 4 Subtraction Facts to 20 Use Strategies 8.11\" width=\"70\" height=\"106\" \/><br \/>\nAnswer:<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-4193\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-Grade-1-Answers-Topic-4-Subtraction-Facts-to-20-Use-Strategies-8.11-1.png\" alt=\"Envision-Math-Common-Core-Grade-1-Answers-Topic-4-Subtraction-Facts-to-20-Use-Strategies-8.11\" width=\"70\" height=\"106\" \/><\/p>\n<p>Question 9.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-2736\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-Grade-1-Answers-Topic-4-Subtraction-Facts-to-20-Use-Strategies-8.12.png\" alt=\"Envision Math Common Core Grade 1 Answers Topic 4 Subtraction Facts to 20 Use Strategies 8.12\" width=\"84\" height=\"103\" \/><br \/>\nAnswer:<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-4194\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-Grade-1-Answers-Topic-4-Subtraction-Facts-to-20-Use-Strategies-8.12-1.png\" alt=\"Envision-Math-Common-Core-Grade-1-Answers-Topic-4-Subtraction-Facts-to-20-Use-Strategies-8.12\" width=\"84\" height=\"103\" \/><\/p>\n<p>Question 10.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-2737\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-Grade-1-Answers-Topic-4-Subtraction-Facts-to-20-Use-Strategies-8.13.png\" alt=\"Envision Math Common Core Grade 1 Answers Topic 4 Subtraction Facts to 20 Use Strategies 8.13\" width=\"79\" height=\"110\" \/><br \/>\nAnswer:<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-4196\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-Grade-1-Answers-Topic-4-Subtraction-Facts-to-20-Use-Strategies-8.13-1.png\" alt=\"Envision-Math-Common-Core-Grade-1-Answers-Topic-4-Subtraction-Facts-to-20-Use-Strategies-8.13\" width=\"79\" height=\"110\" \/><\/p>\n<p><img loading=\"lazy\" class=\"alignnone size-full wp-image-2738\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-Grade-1-Answers-Topic-4-Subtraction-Facts-to-20-Use-Strategies-8.14.png\" alt=\"Envision Math Common Core Grade 1 Answers Topic 4 Subtraction Facts to 20 Use Strategies 8.14\" width=\"578\" height=\"111\" \/><br \/>\nWrite a subtraction equation to solve the problem. Explain which strategy you used.<\/p>\n<p>Question 11.<br \/>\n<strong>Higher Order Thinking<\/strong><br \/>\nMaya has a box of 16 crayons. 7 crayons are broken. How many crayons are NOT broken?<br \/>\n___ &#8211; ___ = ___<br \/>\n___ crayons<\/p>\n<p>Answer:<br \/>\nGiven,<br \/>\nMaya has a box of 16 crayons. 7 crayons are broken.<br \/>\n16 &#8211; 7 = 9<br \/>\n9 crayons are not broken.<\/p>\n<p><strong>Problem Solving<\/strong><br \/>\nSolve each problem.<\/p>\n<p>Question 12.<br \/>\n<strong>Make Sense<\/strong><br \/>\nHolly has 11 books. She has 4 more books than Jack. How many books does Jack have?<br \/>\nJack has ____ books.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-2739\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-Grade-1-Answers-Topic-4-Subtraction-Facts-to-20-Use-Strategies-8.15.png\" alt=\"Envision Math Common Core Grade 1 Answers Topic 4 Subtraction Facts to 20 Use Strategies 8.15\" width=\"307\" height=\"234\" \/><br \/>\nAnswer:<br \/>\nGiven,<br \/>\nHolly has 11 books. She has 4 more books than Jack.<br \/>\n11 &#8211; 4 = 7<br \/>\nThus Jack has 7 books.<\/p>\n<p>Question 13.<br \/>\n<strong>Higher Order Thinking<\/strong><br \/>\nWhat strategy would you use to solve 10 \u2013 6?<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-2740\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-Grade-1-Answers-Topic-4-Subtraction-Facts-to-20-Use-Strategies-8.16.png\" alt=\"Envision Math Common Core Grade 1 Answers Topic 4 Subtraction Facts to 20 Use Strategies 8.16\" width=\"345\" height=\"215\" \/><br \/>\nAnswer:<\/p>\n<p>Question 14.<br \/>\n<strong>Assessment Practice<\/strong><br \/>\nWhich addition facts will help you solve 16 &#8211; 9 = ? Choose two.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-2741\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-Grade-1-Answers-Topic-4-Subtraction-Facts-to-20-Use-Strategies-8.17.png\" alt=\"Envision Math Common Core Grade 1 Answers Topic 4 Subtraction Facts to 20 Use Strategies 8.17\" width=\"150\" height=\"132\" \/><br \/>\nAnswer: 9 + 7 = 16, 7 + 9 = 16<\/p>\n<h3>Lesson 4.8 Solve Word Problems with Facts to 20<\/h3>\n<p><strong>Solve &amp; Share<\/strong><\/p>\n<p>Some books are on a shelf. Aiden puts 4 more books on the shelf. Now there are 12 books. How many books were on the shelf to start?<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-2742\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-Grade-1-Answers-Topic-4-Subtraction-Facts-to-20-Use-Strategies-8.18.png\" alt=\"Envision Math Common Core Grade 1 Answers Topic 4 Subtraction Facts to 20 Use Strategies 8.18\" width=\"696\" height=\"532\" \/><br \/>\nAnswer:<br \/>\nGiven,<br \/>\nSome books are on a shelf. Aiden puts 4 more books on the shelf. Now there are 12 books.<br \/>\n12 &#8211; 4 = 8<br \/>\nThus there were 8 books on the shelf to start.<\/p>\n<p><strong>Visual Learning Bridge<\/strong><\/p>\n<p><img loading=\"lazy\" class=\"alignnone size-full wp-image-2743\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-Grade-1-Answers-Topic-4-Subtraction-Facts-to-20-Use-Strategies-8.19.png\" alt=\"Envision Math Common Core Grade 1 Answers Topic 4 Subtraction Facts to 20 Use Strategies 8.19\" width=\"730\" height=\"215\" \/><\/p>\n<p><strong>Convince Me!<\/strong><br \/>\nSue has 8 crayons. She gets 8 more. How many crayons does she have now? Would you add or subtract to solve the problem? Explain.<\/p>\n<p>Answer:<br \/>\nGiven,<br \/>\nSue has 8 crayons. She gets 8 more.<br \/>\nWe have to add to solve the problem.<br \/>\n8 + 8 = 16<br \/>\nTherefore she has 16 crayons now.<\/p>\n<p><strong>Guided Practice<\/strong><br \/>\nWrite an equation to match the story and solve. Draw a picture to help.<\/p>\n<p>Question 1.<br \/>\nCal rides his bike on Monday. He rides 8 miles on Tuesday. He rides 14 miles in all. How many miles did Cal ride on Monday?<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-2744\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-Grade-1-Answers-Topic-4-Subtraction-Facts-to-20-Use-Strategies-8.20.png\" alt=\"Envision Math Common Core Grade 1 Answers Topic 4 Subtraction Facts to 20 Use Strategies 8.20\" width=\"511\" height=\"178\" \/><br \/>\nAnswer:<br \/>\nGiven,<br \/>\nCal rides his bike on Monday. He rides 8 miles on Tuesday. He rides 14 miles in all.<br \/>\nx + 8 = 14<br \/>\nx = 14 &#8211; 8<br \/>\nx = 6<br \/>\nThus Cal rides 6 miles on monday.<\/p>\n<p><strong>Visual Learning Bridge<\/strong><br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-2745\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-Grade-1-Answers-Topic-4-Subtraction-Facts-to-20-Use-Strategies-8.21.png\" alt=\"Envision Math Common Core Grade 1 Answers Topic 4 Subtraction Facts to 20 Use Strategies 8.21\" width=\"779\" height=\"222\" \/><\/p>\n<p><strong>Convince Me!<\/strong><br \/>\nSue has 8 crayons. She gets 8 more. How many crayons does she have now? Would you add or subtract to solve the problem? Explain.<\/p>\n<p>Answer:<br \/>\nGiven,<br \/>\nSue has 8 crayons. She gets 8 more.<br \/>\nWe have to add to solve the problem.<br \/>\n8 + 8 = 16<br \/>\nTherefore she has 16 crayons now.<\/p>\n<p><strong>Guided Practice<\/strong><\/p>\n<p>Write an equation to match the story and solve. Draw a picture to help.<\/p>\n<p>Question 1.<br \/>\nCal rides his bike on Monday. He rides 8 miles on Tuesday. He rides 14 miles in all. How many miles did Cal ride on Monday?<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-2746\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-Grade-1-Answers-Topic-4-Subtraction-Facts-to-20-Use-Strategies-8.22.png\" alt=\"Envision Math Common Core Grade 1 Answers Topic 4 Subtraction Facts to 20 Use Strategies 8.22\" width=\"510\" height=\"177\" \/><\/p>\n<p>Answer:<br \/>\nGiven,<br \/>\nCal rides his bike on Monday. He rides 8 miles on Tuesday. He rides 14 miles in all.<br \/>\nx + 8 = 14<br \/>\nx = 14 &#8211; 8<br \/>\nx = 6<br \/>\nThus Cal rides 6 miles on monday<\/p>\n<p><strong>Independent Practice<\/strong><br \/>\nWrite an equation to match the story. Then solve. Draw a picture to help.<\/p>\n<p>Question 2.<br \/>\nMaggie wrote 9 pages of a story yesterday. She writes some more pages today. She writes 15 pages in all. How many pages did Maggie write today?<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-2747\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-Grade-1-Answers-Topic-4-Subtraction-Facts-to-20-Use-Strategies-8.23.png\" alt=\"Envision Math Common Core Grade 1 Answers Topic 4 Subtraction Facts to 20 Use Strategies 8.23\" width=\"200\" height=\"74\" \/><br \/>\nAnswer:<br \/>\nGiven,<br \/>\nMaggie wrote 9 pages of a story yesterday.<br \/>\nShe writes some more pages today.<br \/>\nShe writes 15 pages in all.<br \/>\n9 + 6 = 15 pages<br \/>\n15 &#8211; 9 = 6 pages<br \/>\nThus Maggie write 6 pages.<\/p>\n<p>Question 3.<br \/>\nGemma has 6 games. Chris has 13 games. How many fewer games does Gemma have than Chris?<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-2748\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-Grade-1-Answers-Topic-4-Subtraction-Facts-to-20-Use-Strategies-8.24.png\" alt=\"Envision Math Common Core Grade 1 Answers Topic 4 Subtraction Facts to 20 Use Strategies 8.24\" width=\"198\" height=\"51\" \/><br \/>\n___ fewer games<br \/>\nAnswer:<br \/>\nGiven,<br \/>\nGemma has 6 games. Chris has 13 games.<br \/>\n13 &#8211; 6 = 7<br \/>\n6 + 7 = 13<br \/>\nGemma have 7 fewer pages than Chris..<\/p>\n<p>Question 4.<br \/>\nLily has 7 fewer ribbons than Dora. Lily has 13 ribbons. How many ribbons does Dora have?<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-2749\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-Grade-1-Answers-Topic-4-Subtraction-Facts-to-20-Use-Strategies-8.25.png\" alt=\"Envision Math Common Core Grade 1 Answers Topic 4 Subtraction Facts to 20 Use Strategies 8.25\" width=\"190\" height=\"39\" \/><br \/>\n___ ribbons<br \/>\nAnswer:<br \/>\nGiven,<br \/>\nLily has 7 fewer ribbons than Dora. Lily has 13 ribbons.<br \/>\n13 &#8211; 7 = 4<br \/>\nThus Dora have 4 ribbons.<\/p>\n<p><strong>Problem Solving<\/strong><\/p>\n<p>Solve the problems below.<\/p>\n<p>Question 5.<br \/>\n<strong>Reasoning<\/strong><br \/>\nWill has 11 toy cars. How many can he put in his red case? How many can he put in his blue case? Draw a picture and write an equation to solve.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-2750\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-Grade-1-Answers-Topic-4-Subtraction-Facts-to-20-Use-Strategies-8.26.png\" alt=\"Envision Math Common Core Grade 1 Answers Topic 4 Subtraction Facts to 20 Use Strategies 8.26\" width=\"179\" height=\"56\" \/><br \/>\nAnswer:<br \/>\nGiven,<br \/>\n11 = 6 + 5<\/p>\n<p>Question 6.<br \/>\n<strong>Higher Order Thinking<\/strong><br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-2751\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-Grade-1-Answers-Topic-4-Subtraction-Facts-to-20-Use-Strategies-8.27.png\" alt=\"Envision Math Common Core Grade 1 Answers Topic 4 Subtraction Facts to 20 Use Strategies 8.27\" width=\"741\" height=\"152\" \/><br \/>\nAnswer:<br \/>\n9 + 8 = 17<br \/>\nor 8 + 9 = 17<br \/>\n17 &#8211; 9 = 8<br \/>\nor 17 &#8211; 8 = 9<br \/>\nTiana has 9 more oranges than Jan.<\/p>\n<p>Question 7.<br \/>\nAssessment Practice<br \/>\nMackenzie picks some apples. She eats 3 apples. Now she has 9 apples. How many apples did Mackenzie pick to start?<br \/>\nA. 3 apples<br \/>\nB. 6 apples<br \/>\nC. 9 apples<br \/>\nD. 12 apples<br \/>\nAnswer:<br \/>\nGiven,<br \/>\nMackenzie picks some apples. She eats 3 apples. Now she has 9 apples.<br \/>\n9 + 3 = 12<br \/>\nThus the correct answer is option D.<\/p>\n<h3>Lesson 4.9 Reasoning<\/h3>\n<p><strong>Solve &amp; share<\/strong><\/p>\n<p>Write a number story for 14 &#8211; 8. Then write an equation to match your story.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-2752\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-Grade-1-Answers-Topic-4-Subtraction-Facts-to-20-Use-Strategies-8.28.png\" alt=\"Envision Math Common Core Grade 1 Answers Topic 4 Subtraction Facts to 20 Use Strategies 8.28\" width=\"739\" height=\"540\" \/><br \/>\nAnswer: 14 &#8211; 8 = 6<\/p>\n<p><strong>Visual Learning Bridge<\/strong><br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-2753\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-1st-Grade-Answer-Key-Topic-4-Subtraction-Facts-to-20-Use-Strategies-8.29.png\" alt=\"Envision Math Common Core 1st Grade Answer Key Topic 4 Subtraction Facts to 20 Use Strategies 8.29\" width=\"731\" height=\"213\" \/><\/p>\n<p><strong>Convince Me!<\/strong><br \/>\nHow would a story about 12 &#8211; 7 be alike and different from a story about 5 + 7?<\/p>\n<p><strong>Guided Practice<\/strong><\/p>\n<p>Complete the number story. Then complete the equation to match the story. Draw a picture to help.<\/p>\n<p>Question 1.<br \/>\n17 &#8211; 9 =<br \/>\nCarlos has <u>17<\/u> dog treats. Tom has <u>9 <\/u>dog treats. How many more treats does Carlos have?<br \/>\n___ more dog treats<br \/>\nAnswer:<br \/>\nGiven,<br \/>\nCarlos has <u>17<\/u> dog treats. Tom has 9 dog treats.<br \/>\n17 &#8211; 9 = 8<br \/>\nCarlos has 8 more dog treats.<\/p>\n<p><strong>Independent Practice<\/strong><\/p>\n<p>Write a number story to show the problem. Complete the equation to match your story.<\/p>\n<p>Question 2.<br \/>\n9 + 4 = ___<br \/>\nAnswer: 13<\/p>\n<p>Question 3.<br \/>\n12 &#8211; 4 = ___<br \/>\nAnswer: 8<\/p>\n<p>Question 4.<br \/>\n19 \u2013 10 = ___<br \/>\nAnswer: 9<\/p>\n<p><img loading=\"lazy\" class=\"alignnone size-full wp-image-2754\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-1st-Grade-Answer-Key-Topic-4-Subtraction-Facts-to-20-Use-Strategies-8.30.png\" alt=\"Envision Math Common Core 1st Grade Answer Key Topic 4 Subtraction Facts to 20 Use Strategies 8.30\" width=\"307\" height=\"245\" \/><\/p>\n<p><strong>Problem Solving<\/strong><\/p>\n<p>Performance Task<\/p>\n<p>School Books Jon takes 2 books home. He leaves 4 books at school. How can Jon write an addition story about his school books?<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-2755\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-1st-Grade-Answer-Key-Topic-4-Subtraction-Facts-to-20-Use-Strategies-8.31.png\" alt=\"Envision Math Common Core 1st Grade Answer Key Topic 4 Subtraction Facts to 20 Use Strategies 8.31\" width=\"243\" height=\"154\" \/><\/p>\n<p>Question 5.<br \/>\n<strong>Reasoning<\/strong> Write an addition question about Jon&#8217;s books.<br \/>\nAnswer: How many books did Jon have in all?<\/p>\n<p>Question 6.<br \/>\n<strong>Model<\/strong> Draw a picture and write an addition equation to solve your addition question.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-2756\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-1st-Grade-Answer-Key-Topic-4-Subtraction-Facts-to-20-Use-Strategies-8.32.png\" alt=\"Envision Math Common Core 1st Grade Answer Key Topic 4 Subtraction Facts to 20 Use Strategies 8.32\" width=\"212\" height=\"55\" \/><br \/>\nAnswer:<br \/>\n2 + 4 = 6<\/p>\n<p>Question 7.<br \/>\nExplain Is 6 &#8211; 4 = 2 in the same fact family as your addition equation? Circle Yes or No. Yes No Use words, pictures, or equations to explain.<\/p>\n<p>Answer: Yes<\/p>\n<p>The fact family for 2 + 4 = 6 would also have the facts 4 + 2 = 6, 6 &#8211; 2 = 4 and 6 &#8211; 4 = 2<\/p>\n<h3>Topic 4 Fluency Practice Activity<\/h3>\n<p>Color these sums and differences. Leave the rest white.<\/p>\n<p><img loading=\"lazy\" class=\"alignnone size-full wp-image-2757\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-1st-Grade-Answer-Key-Topic-4-Subtraction-Facts-to-20-Use-Strategies-8.33.png\" alt=\"Envision Math Common Core 1st Grade Answer Key Topic 4 Subtraction Facts to 20 Use Strategies 8.33\" width=\"735\" height=\"591\" \/><\/p>\n<p>Answer:<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-4203\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-1st-Grade-Answer-Key-Topic-4-Subtraction-Facts-to-20-Use-Strategies-8.33-1.png\" alt=\"Envision-Math-Common-Core-1st-Grade-Answer-Key-Topic-4-Subtraction-Facts-to-20-Use-Strategies-8.33\" width=\"735\" height=\"591\" \/><\/p>\n<p><strong>Topic 4 Vocabulary Review<\/strong><\/p>\n<p>Understand Vocabulary<\/p>\n<p>Question 1.<br \/>\nCross out the numbers below that do NOT show the difference for 18 -8.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-2758\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-1st-Grade-Answer-Key-Topic-4-Subtraction-Facts-to-20-Use-Strategies-8.34.png\" alt=\"Envision Math Common Core 1st Grade Answer Key Topic 4 Subtraction Facts to 20 Use Strategies 8.34\" width=\"89\" height=\"63\" \/><br \/>\nAnswer:<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-4204\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-1st-Grade-Answer-Key-Topic-4-Subtraction-Facts-to-20-Use-Strategies-8.34-1.png\" alt=\"Envision-Math-Common-Core-1st-Grade-Answer-Key-Topic-4-Subtraction-Facts-to-20-Use-Strategies-8.34\" width=\"89\" height=\"63\" \/><\/p>\n<p>Question 2.<br \/>\nCross out the problems below that do NOT show a doubles fact.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-2759\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-1st-Grade-Answer-Key-Topic-4-Subtraction-Facts-to-20-Use-Strategies-8.35.png\" alt=\"Envision Math Common Core 1st Grade Answer Key Topic 4 Subtraction Facts to 20 Use Strategies 8.35\" width=\"123\" height=\"80\" \/><br \/>\nAnswer:<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-4205\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-1st-Grade-Answer-Key-Topic-4-Subtraction-Facts-to-20-Use-Strategies-8.35-1.png\" alt=\"Envision-Math-Common-Core-1st-Grade-Answer-Key-Topic-4-Subtraction-Facts-to-20-Use-Strategies-8.35\" width=\"123\" height=\"80\" \/><\/p>\n<p>Question 3.<br \/>\nWrite the related fact.<br \/>\n12 &#8211; 7 = 5<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-2760\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-1st-Grade-Answer-Key-Topic-4-Subtraction-Facts-to-20-Use-Strategies-8.36.png\" alt=\"Envision Math Common Core 1st Grade Answer Key Topic 4 Subtraction Facts to 20 Use Strategies 8.36\" width=\"214\" height=\"45\" \/><br \/>\nAnswer:<br \/>\n12 = 5 + 7<\/p>\n<p>Question 4.<br \/>\nWrite the related fact.<br \/>\n10 + 9 = 19<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-2760\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-1st-Grade-Answer-Key-Topic-4-Subtraction-Facts-to-20-Use-Strategies-8.36.png\" alt=\"Envision Math Common Core 1st Grade Answer Key Topic 4 Subtraction Facts to 20 Use Strategies 8.36\" width=\"214\" height=\"45\" \/><br \/>\nAnswer:<br \/>\n19 &#8211; 9 = 10<\/p>\n<p>Question 5.<br \/>\nWrite the related fact.<br \/>\n6 = 14 &#8211; 8<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-2760\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-1st-Grade-Answer-Key-Topic-4-Subtraction-Facts-to-20-Use-Strategies-8.36.png\" alt=\"Envision Math Common Core 1st Grade Answer Key Topic 4 Subtraction Facts to 20 Use Strategies 8.36\" width=\"214\" height=\"45\" \/><br \/>\nAnswer:<br \/>\n8 + 6 = 14<\/p>\n<p><strong>Use Vocabulary in Writing<\/strong><\/p>\n<p>Question 6.<br \/>\nWrite equations using the numbers shown in the model. Then explain what the equations are called using a word from the Word List.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-2761\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-1st-Grade-Answer-Key-Topic-4-Subtraction-Facts-to-20-Use-Strategies-8.37.png\" alt=\"Envision Math Common Core 1st Grade Answer Key Topic 4 Subtraction Facts to 20 Use Strategies 8.37\" width=\"316\" height=\"143\" \/><br \/>\nAnswer:<br \/>\nThese equations are called a fact family.<br \/>\n6 + 9 = 15<br \/>\n9 + 6 = 15<br \/>\n15 &#8211; 6 = 9<br \/>\n15 &#8211; 9 = 6<\/p>\n<h3>Topic 4 Reteaching<\/h3>\n<p><strong>Set A<\/strong><\/p>\n<p>You can count back on a number line to subtract.<br \/>\nFind 10 -6.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-2762\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-1st-Grade-Answer-Key-Topic-4-Subtraction-Facts-to-20-Use-Strategies-8.38.png\" alt=\"Envision Math Common Core 1st Grade Answer Key Topic 4 Subtraction Facts to 20 Use Strategies 8.38\" width=\"325\" height=\"98\" \/><\/p>\n<p>Start at 10 and count back 6 to get to 4. 10 &#8211; 6 = <u>4<\/u><br \/>\nYou can also count on to subtract.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-2763\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-1st-Grade-Answer-Key-Topic-4-Subtraction-Facts-to-20-Use-Strategies-8.39.png\" alt=\"Envision Math Common Core 1st Grade Answer Key Topic 4 Subtraction Facts to 20 Use Strategies 8.39\" width=\"308\" height=\"95\" \/><br \/>\nStart at 6 and count on 4 to get to 10.<br \/>\n6 + 4 = 10, so 10 &#8211; 6 = 4.<br \/>\n10 &#8211; 6 = <u>4<\/u><\/p>\n<p>Find the difference. Use the number line to count back or count on.<\/p>\n<p>Question 1.<br \/>\nFind 9 &#8211; 6.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-2764\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-1st-Grade-Answer-Key-Topic-4-Subtraction-Facts-to-20-Use-Strategies-9.1.png\" alt=\"Envision Math Common Core 1st Grade Answer Key Topic 4 Subtraction Facts to 20 Use Strategies 9.1\" width=\"321\" height=\"81\" \/><br \/>\n9 &#8211; 6 = ___<\/p>\n<p>Answer: 3<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-4206\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-1st-Grade-Answer-Key-Topic-4-Subtraction-Facts-to-20-Use-Strategies-9.1-1.png\" alt=\"Envision-Math-Common-Core-1st-Grade-Answer-Key-Topic-4-Subtraction-Facts-to-20-Use-Strategies-9.1\" width=\"321\" height=\"81\" \/><\/p>\n<p>Question 2.<br \/>\nFind 10 &#8211; 5.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-2765\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-1st-Grade-Answer-Key-Topic-4-Subtraction-Facts-to-20-Use-Strategies-9.2.png\" alt=\"Envision Math Common Core 1st Grade Answer Key Topic 4 Subtraction Facts to 20 Use Strategies 9.2\" width=\"313\" height=\"83\" \/><br \/>\n10 &#8211; 5 = ___<\/p>\n<p>Answer: 5<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-4207\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-1st-Grade-Answer-Key-Topic-4-Subtraction-Facts-to-20-Use-Strategies-9.2-1.png\" alt=\"Envision-Math-Common-Core-1st-Grade-Answer-Key-Topic-4-Subtraction-Facts-to-20-Use-Strategies-9.2\" width=\"313\" height=\"83\" \/><\/p>\n<p><strong>Set B<\/strong><\/p>\n<p>You can make 10 to subtract.<br \/>\n15 &#8211; 6 = ?<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-2766\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-1st-Grade-Answer-Key-Topic-4-Subtraction-Facts-to-20-Use-Strategies-9.3.png\" alt=\"Envision Math Common Core 1st Grade Answer Key Topic 4 Subtraction Facts to 20 Use Strategies 9.3\" width=\"150\" height=\"130\" \/><br \/>\nFirst subtract 5 from 15 to get to 10.<br \/>\n15 &#8211; 5 = 10<br \/>\nThen take away I more to get to 6.<br \/>\n15 &#8211; 6 = <u>9<\/u><\/p>\n<p>Make 10 to subtract. Then complete the subtraction fact.<\/p>\n<p>Question 3.<br \/>\n16 &#8211; 7 = ___<br \/>\n16 &#8211; ___ = 10<br \/>\n10 &#8211; __ = ___<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-2768\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-1st-Grade-Answer-Key-Topic-4-Subtraction-Facts-to-20-Use-Strategies-9.4.png\" alt=\"Envision Math Common Core 1st Grade Answer Key Topic 4 Subtraction Facts to 20 Use Strategies 9.4\" width=\"150\" height=\"122\" \/><br \/>\nAnswer:<br \/>\n16 &#8211; 7 = 9<br \/>\n16 &#8211; 6 = 10<br \/>\n10 &#8211; 1 = 9<\/p>\n<p>Question 4.<br \/>\n13 \u2013 6=___<br \/>\n13 &#8211; __= 10<br \/>\n10 &#8211; __ = __<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-2767\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-1st-Grade-Answer-Key-Topic-4-Subtraction-Facts-to-20-Use-Strategies-9.4.4.png\" alt=\"Envision Math Common Core 1st Grade Answer Key Topic 4 Subtraction Facts to 20 Use Strategies 9.4.4\" width=\"143\" height=\"114\" \/><br \/>\nAnswer:<br \/>\n13 &#8211; 6 = 7<br \/>\n13 &#8211; 3 = 10<br \/>\n10 &#8211; 3 = 7<\/p>\n<p><strong>Set C<\/strong><br \/>\nYou can write a fact family to match the model.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-2769\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-1st-Grade-Answer-Key-Topic-4-Subtraction-Facts-to-20-Use-Strategies-9.5.png\" alt=\"Envision Math Common Core 1st Grade Answer Key Topic 4 Subtraction Facts to 20 Use Strategies 9.5\" width=\"298\" height=\"246\" \/><\/p>\n<p>Write a fact family to match the model.<\/p>\n<p>Question 5.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-2770\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-1st-Grade-Answer-Key-Topic-4-Subtraction-Facts-to-20-Use-Strategies-9.6.png\" alt=\"Envision Math Common Core 1st Grade Answer Key Topic 4 Subtraction Facts to 20 Use Strategies 9.6\" width=\"355\" height=\"159\" \/><br \/>\nAnswer:<br \/>\n8 + 7 = 15<br \/>\n7 + 8 = 15<br \/>\n15 &#8211; 7 = 8<br \/>\n15 &#8211; 8 = 7<\/p>\n<p><strong>Set D<\/strong><\/p>\n<p>You can use addition to help you subtract.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-2771\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-1st-Grade-Answer-Key-Topic-4-Subtraction-Facts-to-20-Use-Strategies-9.7.png\" alt=\"Envision Math Common Core 1st Grade Answer Key Topic 4 Subtraction Facts to 20 Use Strategies 9.7\" width=\"140\" height=\"137\" \/><br \/>\nThink:<br \/>\n7 + <u>8<\/u> = 15<br \/>\nThe missing part is 8. So, 15 &#8211; 7 = 8.<\/p>\n<p>Use addition to subtract. Complete the equations.<\/p>\n<p>Question 6.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-2772\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-1st-Grade-Answer-Key-Topic-4-Subtraction-Facts-to-20-Use-Strategies-9.8.png\" alt=\"Envision Math Common Core 1st Grade Answer Key Topic 4 Subtraction Facts to 20 Use Strategies 9.8\" width=\"138\" height=\"134\" \/><br \/>\n13 &#8211; 8 = ?<br \/>\nThink<br \/>\n8 + __ = 13<br \/>\nSo, 13 &#8211; 8 = ___<\/p>\n<p>Answer:<br \/>\n8 + 5 = 13<br \/>\nSo, 13 &#8211; 8 = 5<\/p>\n<p><strong>Set E<\/strong><\/p>\n<p>You can use different strategies to subtract 14 &#8211; 6.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-2773\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-1st-Grade-Answer-Key-Topic-4-Subtraction-Facts-to-20-Use-Strategies-9.10.png\" alt=\"Envision Math Common Core 1st Grade Answer Key Topic 4 Subtraction Facts to 20 Use Strategies 9.10\" width=\"297\" height=\"184\" \/><\/p>\n<p>Find each difference. Choose a strategy to use.<\/p>\n<p>Question 7.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-2774\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-1st-Grade-Answer-Key-Topic-4-Subtraction-Facts-to-20-Use-Strategies-9.11.png\" alt=\"Envision Math Common Core 1st Grade Answer Key Topic 4 Subtraction Facts to 20 Use Strategies 9.11\" width=\"73\" height=\"107\" \/><br \/>\nAnswer:<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-4208\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-1st-Grade-Answer-Key-Topic-4-Subtraction-Facts-to-20-Use-Strategies-9.11-1.png\" alt=\"Envision-Math-Common-Core-1st-Grade-Answer-Key-Topic-4-Subtraction-Facts-to-20-Use-Strategies-9.11\" width=\"73\" height=\"107\" \/><\/p>\n<p>Question 8.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-2775\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-1st-Grade-Answer-Key-Topic-4-Subtraction-Facts-to-20-Use-Strategies-9.12.png\" alt=\"Envision Math Common Core 1st Grade Answer Key Topic 4 Subtraction Facts to 20 Use Strategies 9.12\" width=\"75\" height=\"109\" \/><br \/>\nAnswer:<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-4209\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-1st-Grade-Answer-Key-Topic-4-Subtraction-Facts-to-20-Use-Strategies-9.12-1.png\" alt=\"Envision-Math-Common-Core-1st-Grade-Answer-Key-Topic-4-Subtraction-Facts-to-20-Use-Strategies-9.12\" width=\"75\" height=\"109\" \/><\/p>\n<p><strong>Set F<\/strong><\/p>\n<p>You can write an equation to show a word problem. Jaime mows some lawns on Saturday and Sunday. He mows 8 lawns on Sunday. He mows 13 lawns in all. How many lawns did Jaime mow on Saturday?<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-2776\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-1st-Grade-Answer-Key-Topic-4-Subtraction-Facts-to-20-Use-Strategies-9.13.png\" alt=\"Envision Math Common Core 1st Grade Answer Key Topic 4 Subtraction Facts to 20 Use Strategies 9.13\" width=\"193\" height=\"79\" \/><\/p>\n<p>Question 9.<br \/>\nDavis has some pens. He gives 4 to Glenn. Now he has 7 pens. How many pens did Davis start with? Write an equation to solve. Draw a picture to help.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-2777\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-1st-Grade-Answer-Key-Topic-4-Subtraction-Facts-to-20-Use-Strategies-9.14.png\" alt=\"Envision Math Common Core 1st Grade Answer Key Topic 4 Subtraction Facts to 20 Use Strategies 9.14\" width=\"191\" height=\"40\" \/><br \/>\n___ pens<\/p>\n<p>Answer:<br \/>\nGiven,<br \/>\nDavis has some pens. He gives 4 to Glenn. Now he has 7 pens.<br \/>\n11 &#8211; 4 = 7<\/p>\n<p><strong>Set G<\/strong><\/p>\n<p><strong>Thinking Habits<\/strong><\/p>\n<p>Reasoning<\/p>\n<p>What do the numbers stand for?<br \/>\nHow can I use a word problem to show what an equation means?<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-2778\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-1st-Grade-Answer-Key-Topic-4-Subtraction-Facts-to-20-Use-Strategies-9.40.png\" alt=\"Envision Math Common Core 1st Grade Answer Key Topic 4 Subtraction Facts to 20 Use Strategies 9.40\" width=\"132\" height=\"141\" \/><\/p>\n<p>Write a number story for the problem. Then complete the equation.<\/p>\n<p>Question 10.<br \/>\n9 + 4 = ___<\/p>\n<p>Answer: 9 + 4 = 13<br \/>\nSage drew 9 blue flowers. Then she drew 4 red flowers. How many flowers did sage draw in all?<\/p>\n<h3>Topic 4 Assessment Practice<\/h3>\n<p>Question 1.<br \/>\nFrank has 15 books to read. He reads 9 of them. How many books does Frank have left to read?<br \/>\n__ books<br \/>\nAnswer:<br \/>\nGiven that,<br \/>\nFrank has 15 books to read. He reads 9 of them.<br \/>\n15 &#8211; 9 = 6<br \/>\nTherefore Frank have 6 books left to read.<\/p>\n<p>Question 2.<br \/>\nMark has some red marbles. He has 8 blue marbles. Mark has 13 marbles in all. How many red marbles does he have?<br \/>\nA. 4<br \/>\nB. 5<br \/>\nC. 6<br \/>\nD. 7<br \/>\nAnswer:<br \/>\nGiven,<br \/>\nMark has some red marbles. He has 8 blue marbles.<br \/>\nMark has 13 marbles in all.<br \/>\n13 &#8211; 8 = 5<br \/>\nThus he has 5 red marbles.<br \/>\nThus the correct answer is option B.<\/p>\n<p>Question 3.<br \/>\nWhich fact family matches the picture of the big ducks and small ducks?<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-2779\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-1st-Grade-Answer-Key-Topic-4-Subtraction-Facts-to-20-Use-Strategies-10.5.png\" alt=\"Envision Math Common Core 1st Grade Answer Key Topic 4 Subtraction Facts to 20 Use Strategies 10.5\" width=\"709\" height=\"242\" \/><br \/>\nAnswer:<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-4210\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-1st-Grade-Answer-Key-Topic-4-Subtraction-Facts-to-20-Use-Strategies-10.5-1.png\" alt=\"Envision-Math-Common-Core-1st-Grade-Answer-Key-Topic-4-Subtraction-Facts-to-20-Use-Strategies-10.5\" width=\"709\" height=\"242\" \/><\/p>\n<p>Question 4.<br \/>\nWhich related subtraction fact can be solved using 7 + 8 = 15?<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-2780\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-1st-Grade-Answer-Key-Topic-4-Subtraction-Facts-to-20-Use-Strategies-10.6.png\" alt=\"Envision Math Common Core 1st Grade Answer Key Topic 4 Subtraction Facts to 20 Use Strategies 10.6\" width=\"180\" height=\"161\" \/><br \/>\nA. 15 &#8211; 8 = 7<br \/>\nB. 14 &#8211; 7 = 7<br \/>\nC. 8 &#8211; 7 = 1<br \/>\nD. 8 &#8211; 8 = 0<br \/>\nAnswer: 15 &#8211; 8 = 7<\/p>\n<p>Question 5.<br \/>\nThere are 13 birds in a tree. Then 6 birds fly away. How many birds are still in the tree? Make 10 to solve. Complete the missing numbers.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-2781\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-1st-Grade-Answer-Key-Topic-4-Subtraction-Facts-to-20-Use-Strategies-10.7.png\" alt=\"Envision Math Common Core 1st Grade Answer Key Topic 4 Subtraction Facts to 20 Use Strategies 10.7\" width=\"209\" height=\"120\" \/><br \/>\n13 &#8211; ___ = 10<br \/>\n10 &#8211; __ = __<br \/>\n13 &#8211; 6 = ___<\/p>\n<p>Answer:<br \/>\nGiven,<br \/>\nThere are 13 birds in a tree. Then 6 birds fly away.<br \/>\nBy using the Make a 10 method we can find the missing numbers.<br \/>\n13 &#8211; 3 = 10<br \/>\n10 &#8211; 3 = 7<br \/>\n13 &#8211; 6 = 7<\/p>\n<p>Question 6.<br \/>\nGloria has 7 yellow pencils. She has 9 red pencils. Which strategy would NOT help you find 9 \u2013 7?<br \/>\nA. Make 10<br \/>\nB. Think Addition<br \/>\nC. Count to Subtract<br \/>\nD. My Way<br \/>\nAnswer: A. Make 10<\/p>\n<p>Question 7.<br \/>\nNina bakes 14 corn muffins. She gives away 8 corn muffins. How many are left? Write an equation to explain.<br \/>\n___ corn muffins<\/p>\n<p>Answer:<br \/>\nGiven,<br \/>\nNina bakes 14 corn muffins. She gives away 8 corn muffins.<br \/>\nThe equation would be 14 &#8211; 8 = 6<\/p>\n<p>Question 8.<br \/>\nFind 16 &#8211; 7.<br \/>\nWrite a related addition fact to help.<br \/>\n16 &#8211; 7 = __<br \/>\nAnswer:<br \/>\nThe related addition fact would be<br \/>\n9 + 7 = 16<br \/>\n7 + 6 = 16<\/p>\n<p>Question 9.<br \/>\nUse the number line to count on or count back to find the difference. Show your work.<br \/>\n12 &#8211; 4 = ___<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-2782\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-1st-Grade-Answer-Key-Topic-4-Subtraction-Facts-to-20-Use-Strategies-11.1.png\" alt=\"Envision Math Common Core 1st Grade Answer Key Topic 4 Subtraction Facts to 20 Use Strategies 11.1\" width=\"571\" height=\"81\" \/><br \/>\nAnswer:<br \/>\n12 &#8211; 4 = 8<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-4211\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-1st-Grade-Answer-Key-Topic-4-Subtraction-Facts-to-20-Use-Strategies-11.1-1.png\" alt=\"Envision-Math-Common-Core-1st-Grade-Answer-Key-Topic-4-Subtraction-Facts-to-20-Use-Strategies-11.1\" width=\"571\" height=\"81\" \/><\/p>\n<p>Question 10.<br \/>\nMing has 14 books. She sells 8 books.<br \/>\nHow many books does she have left?<br \/>\nMake 10 to solve. Use counters and the ten-frame.<br \/>\n____ books<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-2783\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-1st-Grade-Answer-Key-Topic-4-Subtraction-Facts-to-20-Use-Strategies-11.2.png\" alt=\"Envision Math Common Core 1st Grade Answer Key Topic 4 Subtraction Facts to 20 Use Strategies 11.2\" width=\"218\" height=\"126\" \/><br \/>\nAnswer:<br \/>\nGiven,<br \/>\nMing has 14 books. She sells 8 books.<br \/>\n14 &#8211; 8 = 6<br \/>\nBy using make 10 method we can find the number of books she have left.<br \/>\n14 &#8211; 4 = 10<br \/>\n10 &#8211; 4 = 6<br \/>\nThus she have left 6 books.<\/p>\n<p>Question 11.<br \/>\nA box has 16 skateboard parts. Maria used some of the parts. Now there are 7 parts left.<br \/>\nWrite a subtraction equation to show how many parts Maria used.<br \/>\n___ &#8211; ___ = ____<br \/>\nMaria used ___ parts.<br \/>\nAnswer:<br \/>\nGiven,<br \/>\nA box has 16 skateboard parts. Maria used some of the parts.<br \/>\nNow there are 7 parts left.<br \/>\n16 &#8211; 9 = 7<br \/>\nMaria used 9 parts.<\/p>\n<p>Question 12.<br \/>\nWrite a number story for 19 \u2013 10.<br \/>\nThen write an equation to match your story and solve the problem.<br \/>\nAnswer:<br \/>\nDavid has 19 pens. He gives 10 of them to Lee. How many pens does David have now? 19 &#8211; 10 = 9<\/p>\n<h3>Topic 4 Performance Task<\/h3>\n<p>Maria&#8217;s Stickers Maria collects stickers. The chart shows the different stickers she has.<\/p>\n<p><img loading=\"lazy\" class=\"alignnone size-full wp-image-2784\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-1st-Grade-Answer-Key-Topic-4-Subtraction-Facts-to-20-Use-Strategies-11.3.png\" alt=\"Envision Math Common Core 1st Grade Answer Key Topic 4 Subtraction Facts to 20 Use Strategies 11.3\" width=\"348\" height=\"356\" \/><\/p>\n<p>Question 1.<br \/>\nHow many more moon stickers than sun stickers does Maria have? Count, make 10, or think addition to solve.<br \/>\n___ more moon stickers<br \/>\nAnswer: 6 more moon stickers<\/p>\n<p>Question 2.<br \/>\nMaria gives some cloud stickers to Tom. Now she has 5 cloud stickers. How many cloud stickers did Maria give away?<br \/>\nWrite an equation to solve the problem.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-2785\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-1st-Grade-Answer-Key-Topic-4-Subtraction-Facts-to-20-Use-Strategies-11.4.png\" alt=\"Envision Math Common Core 1st Grade Answer Key Topic 4 Subtraction Facts to 20 Use Strategies 11.4\" width=\"193\" height=\"50\" \/><br \/>\n___ cloud stickers<\/p>\n<p>Answer:<br \/>\nGiven,<br \/>\nMaria gives some cloud stickers to Tom. Now she has 5 cloud stickers.<br \/>\n7 &#8211; 5 = 2<br \/>\nThus Maria give away 2 cloud stickers.<\/p>\n<p>Question 3.<br \/>\nComplete the fact family using the number of cloud and rainbow stickers.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-2786\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-1st-Grade-Answer-Key-Topic-4-Subtraction-Facts-to-20-Use-Strategies-11.5.png\" alt=\"Envision Math Common Core 1st Grade Answer Key Topic 4 Subtraction Facts to 20 Use Strategies 11.5\" width=\"325\" height=\"274\" \/><br \/>\nAnswer:<br \/>\nThe related facts for the given equation is<br \/>\n7 + 8 = 15<br \/>\n8 + 7 = 15<br \/>\n15 &#8211; 8 = 7<br \/>\n15 &#8211; 7 = 8<\/p>\n<p>Question 4.<br \/>\nWendy gives Maria 3 more rainbow stickers. How many rainbow stickers does Maria have now? Complete the equation to solve.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-2787\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-1st-Grade-Answer-Key-Topic-4-Subtraction-Facts-to-20-Use-Strategies-11.6.png\" alt=\"Envision Math Common Core 1st Grade Answer Key Topic 4 Subtraction Facts to 20 Use Strategies 11.6\" width=\"169\" height=\"41\" \/><br \/>\n___ rainbow stickers<\/p>\n<p>Answer:<br \/>\nGiven,<br \/>\nWendy gives Maria 3 more rainbow stickers.<br \/>\n8 + 3 = 11<br \/>\nTherefore Maria has 11 rainbow stickers.<\/p>\n<p>Question 5.<br \/>\nWrite a story to show and solve 12 &#8211; 8. Make your problem about star stickers. Draw a picture and write an equation to match your story.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-2788\" src=\"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/Envision-Math-Common-Core-1st-Grade-Answer-Key-Topic-4-Subtraction-Facts-to-20-Use-Strategies-11.7.png\" alt=\"Envision Math Common Core 1st Grade Answer Key Topic 4 Subtraction Facts to 20 Use Strategies 11.7\" width=\"318\" height=\"481\" \/><br \/>\nAnswer:<br \/>\nMaria has 12 star stickers. She gives 8 star stickers to Pat. How many star stickers does she have now?<br \/>\n12 &#8211; 8 = 4<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Practice with the help of enVision Math Common Core Grade 1 Answer Key Topic 4 Subtraction Facts to 20: Use Strategies regularly and improve your accuracy in solving questions. enVision Math Common Core 1st Grade Answers Key Topic 4 Subtraction Facts to 20: Use Strategies enVision STEM Project: Pattern of Day and Night Find Out &#8230; <a title=\"enVision Math Common Core Grade 1 Answer Key Topic 4 Subtraction Facts to 20: Use Strategies\" class=\"read-more\" href=\"https:\/\/bigideasmathanswers.com\/envision-math-common-core-grade-1-answer-key-topic-4\/\" aria-label=\"More on enVision Math Common Core Grade 1 Answer Key Topic 4 Subtraction Facts to 20: Use Strategies\">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\/89979"}],"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=89979"}],"version-history":[{"count":1,"href":"https:\/\/bigideasmathanswers.com\/wp-json\/wp\/v2\/posts\/89979\/revisions"}],"predecessor-version":[{"id":89980,"href":"https:\/\/bigideasmathanswers.com\/wp-json\/wp\/v2\/posts\/89979\/revisions\/89980"}],"wp:attachment":[{"href":"https:\/\/bigideasmathanswers.com\/wp-json\/wp\/v2\/media?parent=89979"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/bigideasmathanswers.com\/wp-json\/wp\/v2\/categories?post=89979"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/bigideasmathanswers.com\/wp-json\/wp\/v2\/tags?post=89979"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}