Question

While you could use the associative property on all the following expressions, select two of the following expressions that using the associative property to write an equivalent expression that would help you calculate the value of the expression using mental math.

Group of answer choices

Answer 1

A, C

Explanation:

A)

(120 ∙ 8) ∙ 5 = 120 ∙ (8 ∙ 5)

Multiply 8 and 5 first to get 40.

Then 40 × 120 = 4800

C)

(17 + 75) + 25 = 17 + (75 + 25)

Add 75 and 25 first to get 100.

then 17 + 100 = 117