414 A est positif x B) Exercice 4: Calculer les expressions en indiquant toutes étapes de calcu A = -12- (-4) x (-5-6) B = -4 + [24 ÷ (-4)] × [ -2 × (-6)] + (+4) x (-3)= y C= 200- [8 x (-3) x (-5)] × (-1)=24001 92 12-(-5-6)x(-6) = -56. Detaille les 24+1-4Dx[-2x 1-6] +-4+(+4) x (3)= 8x (-3)x (-5]1200-1-1)​