Laske
1. 5-7 =
2. -4+9 =
3. -9-2 = =
4. 14-17 =
5. -5+8 =
6. 17-15 =
7. 21-30 =
8. -13-8 =
9. -12+17 =
10. -10+8 =
11. -3+5-2 =
12. 15-19-2 =
13. -12-3-5 =
14. 23-30+4 =
15. 8-6-4+3 =