Question

(6 + 7) + 8 = 21

Choose an equivalent addition sentence that shows the associative property of addition.

Answer 1

6 + (7 + 8) = 21

Explanation:

the associative property of addition is: (a + b) + c = a + (b + c)

So the equivalent addition sentence would be:

(6 + 7) + 8 = 6 + (7 + 8) as they both equal 21