Bonjour,
A = 33/60 ÷ 22/45 = 33/60 × 45/22 = (3×11×3×15)/(4×15×2×11)
= (3×3)/(4×2)
= 9/8
B = 4/3 - 5/6 + 11/8 = 32/24 - 20/24 + 33/24 = 45/24 = 15/8
D = 3/4 - 5/6 ÷ 15/8 = 3/4 - 5/6 × 8/15 = 3/4 - (5×4×2)/(3×2×3×5)
= 3/4 - 4/(3×3)
= 3/4 - 4/9
= 27/36 - 16/36
= 11/36
E = 2 + 5 ÷ (1 + 2/3) = 2 + 5 ÷ 5/3 = 2 + 5 × 3/5
= 10/5 + 15/5
= 25/5
= 5
