Properties of Addition

If I know that 2 + 7 = 9, then I also know that _______________ according to the commutative property of addition.

• 2 + 7 = 9
• 9 + 2 = 7
• 7 + 2 = 9
• 9 + 7 = 2

The _______________ property of addition states that the order you add two numbers doesn't change the answer. (turn-around/flip fact)

• identity
• commutative
• associative

Which expression is an example of the identity property of addition?

• 3 + 0 = 3
• 3 + 1 = 4 and 1 + 3 = 4
• 3 + 4 + 2 = 9 and 4 + 2 + 3 = 9
• 3 + 0 = 0

Which expression is an example of the commutative property of addition?

• 3 + 0 = 3
• 3 + 1 = 4 and 1 + 3 = 4
• 3 + 4 + 2 = 9 and 4 + 2 + 3 = 9
• 3 + 1 = 4 and 3 + 4 = 1

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

• 8
• 6
• 5
• 7

Name the property:
1 + (8+3) = (1+8) + 3

• Associative
• Commutative
• Identity

Which answer shows the commutative property of addition?

• 9 + 5 = 5 + 9

• (6+9)+5 = 6+(9+5)
• 6+0 = 6

Which answer shows the identity property of addition?

• 7+0= 7
• 4+3+7= 3+4+7
• (4+3)+7= 4+(3+7)

The _______________ property of addition states that any number plus zero equals the other number.

• identity
• commutative
• associative

Use the Identity Property to solve;57 + 0 =

• 54

• 55

• 56

• 57