Mathématiques

Question

Help me please
27-39-15+12=
4-11-7+9-16=
Merci d'avance

2 Réponse

  • 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


  • 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


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