Question

7. if a,b,c are rational numbers, then associativity of rational numbers under addition can be given by

(A) a+b = b+a
(B) a+(b+c) = (a+b)+c
(C) a×(b×c) = (a×b)×c
(D) a+(b-c) = (a+b) - c
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Answer 1

Answer:

Associative property of rational number under addition is given by following:

a+(b+c)=(a+b)+c

where, a,b and c are rational numbers.

Hence, B is the correct option.