Explain how knowing 1+7 helps you find the sum for7+1

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Fika · Answer 1 · 2017-08-07T23:49:31+0000

1+7 and 7+1 are the same equations. The numbers are just switched around .
Example:
1+2=3
2+1+3

They add up to the same answer no matter where they are placed, therefore knowing 1+7 helps you find the sum of 7+1 (again, because they are the same)

Explain how knowing 1+7 helps you find the sum for7+1

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