Properties and Strategies to Add and Subtract

Which of the following shows the commutative (flip flop) property of addition?

• 8 + 2 = 2 + 8

• (8 + 2) + 1 = 8 + (2 + 1)

• 8 + 0 = 8

• 8 + 2 = 6 + 4

Which of the following shows the identity property of addition?

• 8 + 2 = 2 + 8

• (8 + 2) + 1 = 8 + (2 + 1)

• 8 + 0 = 8

• 8 + 2 = 6 + 4

Which of the following shows the associative property of addition?

• 8 + 2 = 2 + 8

• (8 + 2) + 1 = 8 + (2 + 1)

• 8 + 0 = 8

• 8 + 2 = 6 + 4

Which property is shown: 7 + 0 = 7

• Commutative

• Associative

• Identity

• This is not a property.

Which property is shown: (7 + 3) + 5 = 7 + (3 + 5)

• Commutative

• Associative

• Identity

• This is not a property.

Which property is shown: 5 + 4 = 4 + 5

• Commutative

• Associative

• Identity

• This is not a property.

Which property is shown: 9 + 3 = 12

• Commutative

• Associative

• Identity

• This is not a property.

Which property says that addends can be flipped and you still get the same answer?

• Commutative

• Associative

• Identity

Which property says that you can add any two numbers first and still get the same answer?

• Commutative

• Associative

• Identity

Which property says that any number with zero added to it is itself?

• Commutative

• Associative

• Identity