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25-10-2016
Mathematics

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

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25-10-2016

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)

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