1. 16 + 12 = 35 31 25 28
2. 9 + 13 = 5 29 22 12
3. 14 + 16 = 35 30 4 12
4. 16 - 12 = 4 12 26 13
5. 20 + 20 = 21 7 40 18
6. 19 + 5 = 24 10 18 27
7. 6 - 13 = 39 37 -7 13
8. 10 - 13 = 19 33 27 -3
9. 19 - 17 = 2 24 5 14
10. 10 - 15 = 22 12 7 -5