Question

Here is an addition sentence.

(3 + 1) + 11 = 15

Choose an equivalent addition sentence that shows the associative property of addition.
A.
(3 + 1) + 11 = 15
B.
3 + (1 + 11) = 15
C.
15 = (3 + 1) + 11
D.
3 + 1 + 11 = 15

Answer 1

Answer: B.
`3+(1+11)=15`

Explanation:

1. By definition, the associative property of addition is:

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

2. Therefore, if you have the following expression:

`(3+1)+11=15`

You apply the Asociative property of addition by regrouping the numbers as following:

`3+(1+11)=15`

3. Then, you can conclude that the correct option is B.