nicolena nicolena
  • 12-10-2016
  • Mathematics
contestada

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

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johnsondaja1234
johnsondaja1234 johnsondaja1234
  • 12-10-2016
its kinda the same thing
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kitkat333 kitkat333
  • 12-10-2016
I think it's the Additive property
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