Question

Which choice shows (3+9) + 13 correctly rewritten using the associative property and then correctly simplified?

Answer 1

Answer:

3 + (9 + 13) = 3 + 22 = 25

Step-by-step explanation:

The associative allows for a change in grouping.

Here, the parentheses are originally grouping the 3 and the 9, which means add 3 and 9 first, then add 13.

With the associative property, you can group the 9 and the 13, which means add the 9 and the 13 first, then add 3.

Answer: 3 + (9 + 13) = 3 + 22 = 25

Answer 2

Answer:

Step-by-step explanation:

(3+9) + 13 could also be written as:

3 + 9 + 13 = 25, or

3 + (9 + 13) = 3 + 22 = 25, or

(3 + 9) + 13 = 12 + 13

We can group the addends in any way desired; this illustates the associative property.