Răspuns :
a) -1+3+7-11-2
2+7-11-2
9-11-2
-2-2
-4
b) -9+7-8-3+1
-2-8-3+1
-10-3+1
-13+1
-12
c) -10+12-13-14
2-13-14
-11-14
-25
d) -19+13-14+20
-33+13+20
-33+33
0
e) -1+2-3+4-5+6
1-3+4-5+6
-2+4-5+6
2-5+6
3+6
9
2+7-11-2
9-11-2
-2-2
-4
b) -9+7-8-3+1
-2-8-3+1
-10-3+1
-13+1
-12
c) -10+12-13-14
2-13-14
-11-14
-25
d) -19+13-14+20
-33+13+20
-33+33
0
e) -1+2-3+4-5+6
1-3+4-5+6
-2+4-5+6
2-5+6
3+6
9