Explications étape par étape:
81/6 = (3×27)/(3×2) = 27/2
(63×25)/(36×25) = 63/36 = (9×7)/(9×4) = 7/4
120/480= (120×1)/(120×4) = 1/4
(18×28)/(27×14) = (2×9×4×7)/(3×9×2×7) = 4/7
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Explications étape par étape:
81/6 = (3×27)/(3×2) = 27/2
(63×25)/(36×25) = 63/36 = (9×7)/(9×4) = 7/4
120/480= (120×1)/(120×4) = 1/4
(18×28)/(27×14) = (2×9×4×7)/(3×9×2×7) = 4/7