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Mathematics, 30.07.2021 01:10 zacharycheyne

Collin states that 8 + (16 + 9) = (8 + 16) + 9 is always true. Which of the following properties would prove Collin is correct?

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Collin states that 8 + (16 + 9) = (8 + 16) + 9 is always true. Which of the following properties wou...
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