Question

8 + 7 = 15

Choose the related addition sentence that shows the commutative property of addition.
A. 15 – 8 = 7
B. 14 + 1 = 15
C. 7 + 8 = 15
D. 15 = 8 + 7

Answer 1

A is the correct anwser

Answer 2

For this case, we have the following generic expression:

`a + b = c\\`

The commutative property of the addition states that the order of the addends does not alter the sum, therefore the previous expression above can be written as:

`b + a = c\\`

Thus the expression
`8 + 7 = 15`, applying the commutative property, can be written as:

`7 + 8 = 15\\`

Answer:

Option c