Question

Check the commutative property for addition and
multiplication of the rational numbers −11/20
and −7/33

Answer 1

let a, b and c are -10/11 , -11/11 and -12/11
addition
-10/11+(-11/11+(-12/11))= (-10/11+(-11/11))+12/11
-10/11 -23/11=-21/11 -12/11
-33/11=-33/11
LHS=RHS
multiplication
-10/11 (-11/11 (-12/11))=(-10/11 (-11/11))-12/11
-10/11×132/121=110/121× -12/11
-1320/1331=-1320/1331
LHS=RHS

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