Explications étape par étape:
A = -2/7 × 14/12 = (-2 × 2 × 7)/(7 × 2 ×2 × 3) =
-1/3
B = -4 + (2×3)/5 = -4 + 6/5 =
(-4×5)/5 + 6/5 = -20/5 + 6/5 = -14/5
C = [(1×8)/8 + 3/8] × 4/10
= (8/8 + 3/8) × 4/10
= 11/8 × 4/10 =(11 × 4)/(2 × 4 ×10)
11/(2×10) = 11/20
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Explications étape par étape:
A = -2/7 × 14/12 = (-2 × 2 × 7)/(7 × 2 ×2 × 3) =
-1/3
B = -4 + (2×3)/5 = -4 + 6/5 =
(-4×5)/5 + 6/5 = -20/5 + 6/5 = -14/5
C = [(1×8)/8 + 3/8] × 4/10
= (8/8 + 3/8) × 4/10
= 11/8 × 4/10 =(11 × 4)/(2 × 4 ×10)
11/(2×10) = 11/20