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Lesson 2-6 Making 10 to Add Mr. Baker 2 nd Grade
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Today We Will Learn! Addition facts involving 9 can be changed to an equivalent fact with 10. Addition facts involving 8 can be changed to an equivalent fact with 10.
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Vocabulary Review
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You have learned how to use ten- frames to show numbers. Today you will use ten-frames to help you add numbers. How did making a 10 help you to add three numbers?
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The Problem!! How can you use these ten- frames to show 9 plus 3?
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How can you show 9? (put 9 counters on the first ten-frame) How can you show 3? (put 3 counters on the second ten-frame) You can make a full ten first by moving one counter from the second ten-frame to the first ten-frame. Now we have 10 + 2 10 + 2 = 12 so 9 + 3 = 12 Let’s try some more. Let’s Explore!!
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Use the tens-frames to solve these. 2. 8 plus 6 3. 7 plus 4 4. 6 plus 7 Use your work mat to record your answers. Let’s Explore!!
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Learning Bridge! In this lesson, you will learn how to make a 10 to help you add. Let’s watch and learn! –CLICK HERECLICK HERE –(After learning bridge use guided practice page to continue lesson.)
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Close In this lesson, you learned that in an addition fact with 9 you can make the 9 a 10 and make the other addend 1 less. The sums of these two facts will be the same. GREAT JOB!
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Math Journal & Technology Draw a picture to show how you can make 10 to help you add 4 + 9. On your I Pad go to the math folder and begin working on Cloud Math.
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