Bonjour,
a• 3/4 × 16 = (3×16)/4 = (3×4×4)/4 = 3×4 = 12
b• 21/3 × 5 = (3×7×5)/3 = 7 × 5 = 35
18/7 × 14 = (18×14)/7 = (18×2×7)/7 = 18 × 2 = 36
8/16 × 4,28 = (1×8)/(2×8) × 4,28 = 1/2 × 4,28 = 0,5 × 4,28 = 2,14
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Bonjour,
a• 3/4 × 16 = (3×16)/4 = (3×4×4)/4 = 3×4 = 12
b• 21/3 × 5 = (3×7×5)/3 = 7 × 5 = 35
18/7 × 14 = (18×14)/7 = (18×2×7)/7 = 18 × 2 = 36
8/16 × 4,28 = (1×8)/(2×8) × 4,28 = 1/2 × 4,28 = 0,5 × 4,28 = 2,14