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Use doubles to help you add 7+8
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Use doubles to help you add 7+8

User Jeffgabhart
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7 + 8 = 15 konfirmasion
User LearnAsWeGo
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you can subtract 8 -1=7 and then add 7+7=14 and then do 14+1=15 because we subtracted 1 from 8.
User Rick Lee
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