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Practice >>
Fifth Grade >>
Properties of Numbers: Properties of addition

Which equation shows the identity property of addition?

(9 + 0) + 9 = 9 + (0 + 9)

0 + 9 = 9

(0 + 9) + 9 = 0 + (9 + 9)

9 + 0 = 0 + 9

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