Properties of Additions

What is property of addition?

• States that when zero (0) is added to any number, the sum is the number itself?

• you add

• you divide

• you take away

What is Associative property of addition?

• you multiply

• you add zero

• States that changing the grouping of the addens does not change the sum?

• you subtract

what kind of property of addition is this- 8+0=8?

• Commutative property?

• Identity property?

• Assiociative property?

What kind of propert of Addition is this- 34+31=31+34

• Commutative property?

• Assiociative property?

• Identity property?

Use mental math to solve.

120 + 42 + 80

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What kind of property of addition is this- (21+12)+14=21(12+14)

• Assiociative property

• Commutative property

• Identity property

What is Commutative property of addition

• you divide

• States that changing the order of the addens will give the same sum?

• you minus

• you Add

Find the missing number (use properties of addition to help):

28 + 54 = 54 + _____

Find the missing number (use properties of addition to help):

(109 + 218) + 82 = 109 + ( ______ + 82)

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