Sagot :
Bonsoir
5/8+7/12=5×3/8×3+7×2/12×2=15/24+14/24=29/24
11/6+5/21=11×7+6×7+5×2/21×2=77/42+10/42=87/42=29/14
11/15-4/21=11×5/15×5-4×3/25×3=55/75-12/75=43/75
Bonsoir
5/8+7/12=5×3/8×3+7×2/12×2=15/24+14/24=29/24
11/6+5/21=11×7+6×7+5×2/21×2=77/42+10/42=87/42=29/14
11/15-4/21=11×5/15×5-4×3/25×3=55/75-12/75=43/75