Réponses

2014-10-11T16:19:23+02:00


I = - (7 - 17) - (- 6 + 10) - (9 - 11)

I = - (- 10) - 4 - (- 2)

I = 10 - 4 + 2

I = 8

2014-10-11T16:20:12+02:00
I= -7+17+6-10-9+11
I= -7-9-10+17+6+11
I= -26+ 34
I= 8