matt says he can find the sum of 45+50 without rewriting it. Explain how you can solve this problem using mental math.

asked Jan 13, 2017 193k views

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you can use partial products. you can break up45 into 40 and 5 and leave 50. so u do 50+40=90 and add five. so 90+5=95.

Tallulah answered Jan 19, 2017

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