Bonjour , Calculer mentalement chaque expression. A = - 3 - 2 × ( - 4 ) B = - 6 : 2 + 10 C = - 5 × 3 + ( - 12 ) : ( - 3 ) D = 9 × ( 5 - 7 ) E = - 11 - 2
Mathématiques
mumu14326
Question
Bonjour , Calculer mentalement chaque expression. A = - 3 - 2 × ( - 4 ) B = - 6 : 2 + 10 C = - 5 × 3 + ( - 12 ) : ( - 3 ) D = 9 × ( 5 - 7 ) E = - 11 - 2 × 15 F = 15 + 5 × ( - 3 )
1 Réponse
-
1. Réponse lemortalex
A = -3 - 2 x (-4) = -3 + 2 x 4 = -3 + 8 = 5
B = -6:2 +10 = -3 + 10 = 7
C = -5 x 3 + (-12) = -15 - 12 = -27
D = 9 x (5 - 7) = 9 x (-2) = -18
E = -11 - 2 x 15 = -11 - 30 = -41
F = 15 + 5 x (-3) = 15 - 15 = 0