Question

For any two integers $x$ and $y$, which of the following suggests that operation of addition is commutative?

• A. $x$ $-$ $y$ = $y$ $-$ $x$
• B. $x$ + $y$ = $y$ + $x$
• C. $x$ + $y$ > $x$
• D. $x$ $\times$ $y$ = $y$ $\times$ $x$

Answer 1

The correct option is B $x$ + $y$ = $y$ + $x$

Commuting the order of the numbers in addition does not change the sum.

Using two variables $x$ and $y$, the commutative property of addition of two numbers is expressed as follows:
$x$ + $y$ = $y$ + $x$