| Subtraction | 13 | 14 | 15 | 16 | 17 |
| 9 | 13-9 = 4 | 14-9 = 5 | 15-9 = 6 | 16-9 = 7 | 17-9 = 8 |
| 10 | 13-10 = 3 | 14-10 = 4 | 15-10 = 5 | 16-10 = 6 | 17-10 = 7 |
| 11 | 13-11 = 2 | 14-11 = 3 | 15-11 = 4 | 16-11 = 5 | 17-11 = 6 |
| 12 | 13-12 = 1 | 14-12 = 2 | 15-12 = 3 | 16-12 = 4 | 17-12 = 5 |
| 13 | 13-13 = 0 | 14-13 = 1 | 15-13 = 2 | 16-13 = 3 | 17-13 = 4 |
| Subtraction | 12.1 | 12.2 | 12.3 | 12.4 | 12.5 | 12.6 |
| 8.1 | 12.1-8.1 = 4 | 12.2-8.1 = 4.1 | 12.3-8.1 = 4.2 | 12.4-8.1 = 4.3 | 12.5-8.1 = 4.4 | 12.6-8.1 = 4.5 |
| 8.2 | 12.1-8.2 = 3.9 | 12.2-8.2 = 4 | 12.3-8.2 = 4.1 | 12.4-8.2 = 4.2 | 12.5-8.2 = 4.3 | 12.6-8.2 = 4.4 |
| 8.3 | 12.1-8.3 = 3.8 | 12.2-8.3 = 3.9 | 12.3-8.3 = 4 | 12.4-8.3 = 4.1 | 12.5-8.3 = 4.2 | 12.6-8.3 = 4.3 |
| 8.4 | 12.1-8.4 = 3.7 | 12.2-8.4 = 3.8 | 12.3-8.4 = 3.9 | 12.4-8.4 = 4 | 12.5-8.4 = 4.1 | 12.6-8.4 = 4.2 |
| 8.5 | 12.1-8.5 = 3.6 | 12.2-8.5 = 3.7 | 12.3-8.5 = 3.8 | 12.4-8.5 = 3.9 | 12.5-8.5 = 4 | 12.6-8.5 = 4.1 |
| 8.6 | 12.1-8.6 = 3.5 | 12.2-8.6 = 3.6 | 12.3-8.6 = 3.7 | 12.4-8.6 = 3.8 | 12.5-8.6 = 3.9 | 12.6-8.6 = 4 |