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