Réponses

2014-09-17T12:59:39+02:00
27 - 39 - 15 + 12 = 27 + 12 - 39 - 15 = 39 - 39 - 15 = - 15

4 - 11 - 7 + 9 - 16 = 4 + 9 - 11 - 7 - 16 = 13 - 34 = - 21

  • Utilisateur Brainly
2014-09-17T13:33:24+02:00


Salut :D
  
                                

 a)27 - 39 - 15 + 12 = 27 + 12 - 39 - 15 = 39 - 39 - 15 = - 15

b)4 - 11 - 7 + 9 - 16 = 4 + 9 - 11 - 7 - 16 = 13 - 34 = - 21