Réponses

2014-04-07T21:44:02+02:00
Bonsoir

a) -7+3-4    = -11 +3 = - 8

 b)-8+9-5+8  = +17 - 13 = +4   

 c)12-5+7-9+3 = + 22 - 14 = +8 

d)1-2+3-4+5-6
= +9 -12 = - 3

2014-04-07T21:45:53+02:00
A) -7+3-4 = -8
b) -8+9-5+8 = 4
c) 12-5+7-9+3 = 8
d) 1-2+3-2+5-6 = -3
a) -7+3-4 = -11 +3 = - 8

b)-8+9-5+8 = +17 - 13 = +4

c)12-5+7-9+3 = + 22 - 14 = +8

d)1-2+3-4+5-6 = +9 -13 = - 4