Réponses

2013-05-18T16:54:39+02:00
2013-05-18T16:55:51+02:00

Bonjour,

 

5-(+12)-(-4)+(-5) = 5+(-12)+(+4)+(-5) = -(12-5)+(-(5-4)) = (-7)+(-1) = -(7+1) = (-8)