Réponses

2013-05-20T20:21:31+02:00

e) -5-17-13+8-2=-29

f)12+3-12-3=0

g)15+3-12+16=22

Meilleure réponse !
2013-05-20T20:31:22+02:00
E = (-5) - (17 + (-13)) - ((-8) - (+2)
E = (-5) - (4) -(-6)
E = -5-4+6
E = +3

F = (12-(-3)) - (12-(-3))
F = (12+3) - (12+3)
F = 15-15
F= 0

G = 15 - [-3 ((+12)-16)]
G = 15-[-3(12-16)]
G = 15-(-3-4)
G = 15-(-7)
G = 15+7
G = 22