1. 19 - 15 = 31 36 21 4
2. 17 + 11 = 5 31 12 28
3. 1 - 3 = 18 39 -2 34
4. 10 - 17 = 32 2 6 -7
5. 6 - 7 = 10 -1 24 37
6. 8 - 17 = 19 -9 27 17
7. 16 - 1 = 15 4 5 18
8. 14 + 3 = 9 35 17 29
9. 14 - 19 = 34 18 -5 12
10. 11 - 5 = 32 6 2 30