Réponses

  • Utilisateur Brainly
2014-09-14T16:09:45+02:00
A= 3 - 5 × (9 + 7)
A= 3 - 5 x 16
A= 3 - 80
A= - 77

B= 3 - (5 × 9 + 7)
B= 3 - (45 + 7)
B= 3 - 52
B= - 49

C= 4 - [6 - (1 - 8)]
C= 4 - (6 + 7)
C= 4 - 13
C= - 9
2014-09-14T16:11:11+02:00
Calculer les expressions suivantes :

A =  3 - 5 × (9 + 7)
A = 3 - 5 x 16
A = 3 - 80
A = - 77

B = 3 - (5 × 9 + 7)
B = 3 - (45 + 7)
B = 3 - 52
B = - 49

C = 4 - [6 - (1 - 8)]

C = 4 - (6 - (- 7))
C = 4 - (6 + 7)
C = 4 - 13
C = - 9