Which of the following statements demonstrates the associative property of addition?

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(2.5 + 5) + 7.5 = 2.5 + (5 + 7.5)

2.5 + 5 = 5 + 2.5

2.5 + (− 2.5) = 0

2.5 + 0 = 2.5

answer is D.

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Detailed Solution

The associative property of addition states that to add three numbers, any two can be added first, followed by adding the sum to the third. therefore, (2.5 + 5) + 7.5 = 2.5 + (5 + 7.5), demonstrates this property, so it is the correct choice.

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