Réponses

2012-11-11T17:55:40+01:00

A=(+6)+(-4)-(+9)-(-2)+(-7)=6-4-9+2-7=-12

B=(-25)-(-12)+(-8)+(+5)-(+11)=-25+12-8+5-11=-27

C=14-7+3-14+10-5=1

D=-29+20-33+29+13=0