Réponses

2014-09-16T12:55:14+02:00
A = 1 + 1 = 2
B = 7 + 5 = 12
C = 12-11 = +1
D = 5 - 7 = -2

2014-09-16T12:57:57+02:00
Calculer :

A = 1 + 1
A = 2

B = 7 + 5
B = 12


C = 12 - 11
C = 1


D = 5 - 7
D = - 2