Bonjour,
48 × 3/8 = (48×3)/8 = (6×8×3)/8 = 6×3 = 18
6/7 × 49 = (6×49)/7 = (6×7×7)/7 = 6×7 = 42
4/10 × 100 = (4×100)/10 = (4×10×10)/10 = 4×10 = 40
12 × 2/24 = (12×2)/24 = 24/24 = 1
35 × 12/30 = (35×12)/30 = (7×5×6×2)/(6×5) = 7×2 = 14
9/54 × 12 = (9×12)/54 = (9×6×2)/(9×6) = 2
6 × 16/12 = (6×16)/12 = (2×3×4×4)/(3×4) = 2×4 = 8
7/14 × 2 = (7×2)/14 = 14/14 = 1
2,3 × 9/3 = 2,3 × 3 = 6,9
les 4/6 de 42 = 4/6 × 42 = (4×42)/6 = (4×6×7)/6 = 4×7 = 28
le triple de 7/6 = 3 × 7/6 = (3×7)/6 = (3×7)/(3×2) = 7/2 = 3,5
5 × 7/15 × 3 = (5×7×3)/15 = (15×7)/15 = 7
