Answer:
a + b = b + a
Step-by-step explanation:
The commutative property of addition allows us to "switch" values around an addition sign.
The first choice is a+b = a-b. The operation is changed; the problem is not just flipped around. This is not the commutative property.
The second choice is a+(b+c) = (a+b)+c. In this problem, the parentheses are switched; this is an example of the associative property, not the commutative property.
The third choice is a+b = a+c. The values that are added are changed, not flipped; this is not the commutative property.
The last choice is a+b = b+a. In this equation, the values are flipped around the addition symbol; this is the commutative property.
