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How to do mental math for 9.7+3+6.3

User Kafo
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2 Answers

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.7+.3=1
9+6=15
15+3=18
18+1=19
User Barak Manos
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2 votes
9.7 + 3 = 12.7
12.7 + 6.3 = 19.
so your answer is 19.
User Ruslangm
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