Réponses

2014-05-11T09:49:55+02:00
A = ( - 8) + (+12)
A = - 8 + 12
A = + 3                 

B = (+7) + (- 5)
B = 7 - 5
B = 2                

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

D = (-13) + (+ 5)
D = - 13 + 5
D = - 8

E = (- 6) + (- 2)
E = - 6 - 2
E = - 8                    

F = (+ 5) + (+ 9)
F = 5 + 9
F = 14              

G = (- 7) + (+ 3)
G = - 7 + 3
G = - 4             

H = (+ 2) + (- 12)
H = 2 - 12
H = - 10