1.

For any two integers x and y, which of the following suggests that operation of addition is commutative ?(A) x + y = y + x (B) x + y > x(C) x – y = y – x (D) x × y = y × x

Answer»

(A) x + y = y + x

Let us assume a and b are the two integers,

Then, commutative law of addition = a + b = b + a

Where, a = x, b = y

Therefore, commutative law of addition = x + y = y + x



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