Explicación paso a paso:
Si a(bc) = (ab)c, aplicamos.
9(7×5) = (9×7)5
9 × 35 = 63 × 5
315 = 315
8(6×7) = (8×6)7
8 × 42 = 48 × 7
336 = 336
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Explicación paso a paso:
Si a(bc) = (ab)c, aplicamos.
9(7×5) = (9×7)5
9 × 35 = 63 × 5
315 = 315
8(6×7) = (8×6)7
8 × 42 = 48 × 7
336 = 336