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Mathematics

3 October, 02:02

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)