Réponses

2014-10-01T13:31:05+02:00
A= (1-2) + (3-2) - (6-7)- (8-7)
= -1 + 1 +1 -1
= 0

B= -4 +(-5) + [5-(-1)]
= -4 + (-5) +6
= -9 + 6
= -3
  • Utilisateur Brainly
2014-10-01T13:31:39+02:00