Réponses

2014-09-07T19:10:29+02:00
1) - 7- 4 = - 11
2) - 5 + 10 = 5
3) -15 + 29 = 14
4) (+7) - (+4) - (-9) + (-2) -7 = 7 - 4 + 9 - 2 - 7 = 3
5) 14 -7 +3 -14 +10 -5 = - 7 - 5 + 3 + 10 = - 12 + 13 = 1
6) -19 +3
= - 16
2014-09-07T19:11:01+02:00
1) - 7- 4 = -11
2) - 5 + 10 = 5 
3) -15 + 29 = 14
4) (+7) - (+4) - (-9) + (-2) -7 = 7-4+9-2-7=-13+16 = 3
5) 14 -7 +3 -14 +10 -5 = -26+27 =1
6) -19 +3 = - 16