7 + 8 = (6 + 1) + 8 = 6 + (1 + 8) = 15. Changing the grouping of the numbers shows which property of addition?

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A Distributive
B Commutative
C Associative
D Identity

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Answer: C. Associative

The number 7 is broken down into 6 + 1. By changing the grouping of the addends, (6 + 1) + 8 becomes 6 + (1 + 8), which demonstrates the Associative Property of addition.

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7 + 8 = (6 + 1) + 8 = 6 + (1 + 8) = 15. Changing the grouping of the numbers shows which property of addition?

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