Réponse:
•A = 2 × (-3) -5 ×7 (priorité de calcul, on commence par les multiplication)
A = -6 -35 Revient à (-6)+(-35)
A = -41
•B = 6 × (4 -3 × 8) (priorité de calcul dans la parenthèse)
B = 6 × (4 -24) (on fait la double distributivite)
B = 6×4 + 6×(-24) (priorité de calcul)
B = 24 + (-144)
B = -120
•C = -5 × (-7) + 45÷(-5) (priorité de calcul)
C = 35 + 9
C = 44
•D = (6 + 4×(-5)) : (20 – 3 × 8 – 3)
D = (6+(-20)) ÷ (20 -24 -3)
D = -14 ÷ (-7)
D = 2
•E = 15 + 3×(-8) × (-2) – 4
E = 15 + (-24 × (-2) -4
E = 15 + 48 -4
E = 63 -4
E = 59