Réponse :
Explications étape par étape :
Bonjour
Réponse en fichier joint
Bonjour,
8/3 × 5/7 = (8×5)/(3×7) = 40/21
6 × 11/5 = 6/1 × 11/5 = (6×11)/(1×5) = 66/5
7/4 ÷ 3/5 = 7/4 × 5/3 = (7×5)/(4×3) = 35/12
15/8 ÷ 2 = 15/8 × 1/2 = (15×1)/(8×2) = 15/16
2/3 × 9/4 = (2×9)/(3×4) = (2×3×3)/(3×2×2) = 3/2 (après simplification par 2 3)
15/7 × 14/25 = (15×14)/(7×25) = (3×5×2×7)/(7×5×5) = (3×2)/5 = 6/5 (après simplification par 5 et 7)
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Réponse :
Explications étape par étape :
Bonjour
Réponse en fichier joint
Bonjour,
8/3 × 5/7 = (8×5)/(3×7) = 40/21
6 × 11/5 = 6/1 × 11/5 = (6×11)/(1×5) = 66/5
7/4 ÷ 3/5 = 7/4 × 5/3 = (7×5)/(4×3) = 35/12
15/8 ÷ 2 = 15/8 × 1/2 = (15×1)/(8×2) = 15/16
2/3 × 9/4 = (2×9)/(3×4) = (2×3×3)/(3×2×2) = 3/2 (après simplification par 2 3)
15/7 × 14/25 = (15×14)/(7×25) = (3×5×2×7)/(7×5×5) = (3×2)/5 = 6/5 (après simplification par 5 et 7)