Mathematics, 25.06.2019 11:30 edwardp03418

(6 + 7) + 8 = 21 choose an equivalent addition sentence that shows the associative property of addition. a. (6 + 7) + 8 = 21 b. 6 + (7 + 8) = 21 c. 6 + 7 + 8 = 21 d. 21 = (6 + 7) + 8

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