If 21+24=45, then _+21=45

Commutative property of Addition means that you can add numbers in any order the answer will be the same

Fill in the blanks

17 + _ = 5 + 17

55+0=__

Additive IdentityProperty means that when we add 0 to any number, the answer is NOT the same number

0+__=91

(3+__) + 4 = (4+3) +7

When we add three or more numbers in any order the answer is the same. This is the Associative Property of Addition

Identify this Property of Addition: 3+0=3

Identify this Property of Addition: 4+1=1+4

Identify this Property of Addition: (4+1) + 5 = (5+4) + 1 = 10