EXERCICE 8 Calculer les expressions suivantes : A = (-8 + 12-5+7) x (11-13-7-2) B = -7 x 3-9x (-5) + (-4) × 9-7 C = 6-[-4 × (-3) + 5× (-2)] × (-4) X

Réponse :

bonjour

Explications étape par étape :

A = (-8 + 12-5+7) x (11-13-7-2)

= 6 x -11

=-66

B = -7 x 3-9x (-5) + (-4) × 9-7

=-21 +45-36-7

=-21-36-7+45

=-64 +45

=-19

C = 6-[-4 × (-3) + 5× (-2)] × (-4)

= 6 -(12+40)

=6-52

=-40