Réponse :
Bonjour
Explications étape par étape
C = 1/2 - 9/4 + 1/5
C = 10/20 - 45/20 + 4/20
C = -31/20
D = 35/14 × 24/32
D = (7×5×8×3)/(7×2×8×4)
D = 15/8
E = -5/3 ÷ 1/(-12)
E = -5/3 × (-12)
E =( (-5) × 3 × (-4))/3
E = 20
F = 5/3 - 2/3 × 5/2 + 1/2
F = 5/3 - ((2×5)/(3×2)) + 1/2
F = 5/3 - 5/3 + 1/2
F = 1/2
