1.
Which number sentence shows the commutative property of addition?

9 + 3 = 12

9 + 3 = 3 + 9

3 + (9 + 1) = (3 + 9) + 1

3 * 9 = 27


2.
Use the commutative property of multiplication to identify which expression is equivalent to 6(2)(x).

12x

6(2x)

2(6)(x)

6 + 2 + x


3.
Use the commutative property to identify which expression is equal to (6+4)*5

5 * (6 + 4)

5 * 6 + 4 * 6

5 + (6 * 4)

(6 + 4 * 5)

4.
What is missing for the following quantity to be true? 9x + 3y +5a =3y + _ + 5a

a. 10x

b. 3y

c. 9x

d. 5a

5.
Which number sentence shows the associative property of addition? Choose all that apply.

a. 8 + (2 + 3) = (8 + 2) + 3

b. 3x(5 + 2) = 3x(5) + 3x(2)

c. 8z + 9p = 9p + 8z

d. (6 + 5) + 9 = 6 + (5 + 9)