Mathematics, 15.07.2019 17:30, olguita82

1. which number sentence shows the commutative property of addition? a. 9 + 3 = 12 b. 11 + 7 = 7 + 11 c. 3 * 9 = 27 d. 3 + (9 + 1) = (3 + 9) + 1 2. use the commutative property to identify which expression is equal to (4 + 7) * 3 a. 4 * 3 + * 3 b. 3 * (4 + 7) c. (3 * 4 + 7) d. (4 + 7 * 3)

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1. which number sentence shows the commutative property of addition? a. 9 + 3 = 12 b. 11 + 7 = 7 +...