using communicative and associativity of addition express as a rational number. 3/7+-4/9+-11/7+7/9​

1 thought on “using communicative and associativity of addition express as a rational number. 3/7+-4/9+-11/7+7/9​”

1. (3/7-11/7)+(7/9-4/9)

   (-8/7)+(3/9)

   (-72+27)/56

   -45/56

   -5/8.

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