Bonjour,
3/8 * 7/4 = 21/ 32
Excuse-moi pour l'erreur .
11/4 * 3/5 = 33/20
21/20 * 5/7 = 3/ 4
15/42 * 2/5 = 3/21 = 1/7
(44*27* 4) / ( 15*32 * 21) = 4 752/ 10 080 =
2376/ 5040 = 1188 / 2520= 594/ 1260 = 297 / 630 = 33/ 70
on divise par 144
3/8 × 7/4 = (3×7)/(8×4) = 21/32
11/4 × 3/5 = (11×3)/(4×5) = 33/20
21/20 × 5/7 = (21×5)/(20×7) = (3×7×5)/(4×5×7) = 3/4
15/42 × 2/5 = (15×2)/(42×5) = (3×5×2)/(3×2×7×5) = 1/7
44/15 × 27/32 × 4/21 = (44×27×4)/(15×32×21)
= (2×2×11×3×3×3×2×2)/(3×5×2×2×2×2×2×3×7)
= (3×11)/(2×5×7)
= 33/70