Explications étape par étape:
A = 3/3 ÷ 8/5 = 1 × 5/8 = 5/8
B = (-4/45 )÷ 3/7 = -4/45 × 7/3 = -28/135
C = 32/12 + (-10)/12 + 21/12 = 43/12
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Explications étape par étape:
A = 3/3 ÷ 8/5 = 1 × 5/8 = 5/8
B = (-4/45 )÷ 3/7 = -4/45 × 7/3 = -28/135
C = 32/12 + (-10)/12 + 21/12 = 43/12