1. | 3 - 1 = 2 | 13 - 6 = 7 | 10 - 2 = 8 | 9 - 7 = 2 | 3 - 2 = 1 |
2. | 14 - 5 = 9 | 7 - 3 = 4 | 5 - 4 = 1 | 16 - 9 = 7 | 15 - 6 = 9 |
3. | 16 - 8 = 8 | 12 - 4 = 8 | 15 - 6 = 9 | 14 - 8 = 6 | 9 - 5 = 4 |
4. | 7 - 2 = 5 | 12 - 9 = 3 | 11 - 3 = 8 | 14 - 7 = 7 | 2 - 1 = 1 |
5. | 11 - 8 = 3 | 10 - 8 = 2 | 3 - 3 = 0 | 12 - 8 = 4 | 12 - 6 = 6 |
6. | 4 - 3 = 1 | 8 - 7 = 1 | 10 - 6 = 4 | 11 - 6 = 5 | 13 - 5 = 8 |
7. | 7 - 1 = 6 | 4 - 0 = 4 | 10 - 4 = 6 | 15 - 9 = 6 | 7 - 0 = 7 |
8. | 13 - 5 = 8 | 9 - 8 = 1 | 8 - 4 = 4 | 8 - 4 = 4 | 17 - 9 = 8 |
9. | 8 - 5 = 3 | 13 - 8 = 5 | 4 - 2 = 2 | 17 - 8 = 9 | 5 - 1 = 4 |
10. | 4 - 3 = 1 | 7 - 5 = 2 | 12 - 6 = 6 | 12 - 3 = 9 | 13 - 8 = 5 |
11. | 8 - 3 = 5 | 11 - 5 = 6 | 10 - 8 = 2 | 15 - 8 = 7 | 10 - 9 = 1 |
12. | 10 - 2 = 8 | 8 - 7 = 1 | 4 - 1 = 3 | 13 - 4 = 9 | 17 - 9 = 8 |
13. | 8 - 1 = 7 | 7 - 4 = 3 | 3 - 2 = 1 | 10 - 1 = 9 | 6 - 4 = 2 |
14. | 14 - 9 = 5 | 1 - 0 = 1 | 4 - 1 = 3 | 12 - 5 = 7 | 4 - 0 = 4 |
15. | 12 - 7 = 5 | 12 - 9 = 3 | 10 - 3 = 7 | 10 - 9 = 1 | 15 - 7 = 8 |
16. | 11 - 2 = 9 | 6 - 5 = 1 | 9 - 4 = 5 | 9 - 2 = 7 | 3 - 0 = 3 |
17. | 8 - 2 = 6 | 7 - 3 = 4 | 11 - 5 = 6 | 8 - 1 = 7 | 13 - 7 = 6 |
18. | 6 - 3 = 3 | 9 - 7 = 2 | 15 - 9 = 6 | 5 - 2 = 3 | 9 - 1 = 8 |
19. | 7 - 6 = 1 | 9 - 5 = 4 | 14 - 8 = 6 | 5 - 3 = 2 | 18 - 9 = 9 |
20. | 9 - 4 = 5 | 7 - 4 = 3 | 5 - 4 = 1 | 6 - 3 = 3 | 11 - 6 = 5 |
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