Réponses

2013-12-05T17:02:55+01:00
M= (+8)-(-5)=8+5=13
N = (-7)-(+6)=-7-6=-13
P = (-8)+3=-8+3=-5
R = 12-(+9)=12-9=3
S = -27-(-9)=-27+9=-18
T = -24,4+(-24)=-24,4-24=-48,4