Expressions and Properties

What number fills in the blank?
5 + ____ = 8 + 5

• 5
• 7
• 8
• 13

What number fills in the blank?
5 + (7 + 6) = (5 + ___) + 6

• 8
• 6
• 5
• 7

What two operations use the commutative property?

• addition and subtraction
• addition and multiplication
• addition and division
• subtraction and division

Which problem shows the commutative property?

• 3x4=4x3
• 7x9=7x8
• 2+5=5x2
• 2+6=8

Commutative Property of Multiplication

• 8 + 2 = 2 + 8
• 7 x 1 = 7
• 7 + 0 = 7
• 7 x 6 = 6 x 7

Which of these illustrates the associative property of multiplication?

• 4 x (5 x 6) = (4 x 5) x 6
• 6 (9 + 1) = (6 x 9) + (6 x 1)
• 4 x (56) = (45) x 6
• 5 + 0 = 0 + 5

Rewrite (9 + 6) + 5 using the associative property.

• 20
• (9 + 6) + 5 = (9 + 5) + 6
• (9 + 6) + 5  = 9 + (6+5)
• (9 + 6) + 5  = 5 + 9 + 5 + 6

The commutative property of multiplication states that the order of the numbers in an equation:

• Should go from least to greatest
• Doesn't change the product
• Should go from greatest to least
• Is always important

Simplify 5(2 - 7n)

• 52 - 57n

• 10 - 7n

• 10 - 35n

• 10 + 35n

Simplify   6(x + -2)

• 6x + -2
• 6x + -12
• 4x
• 6x - 2