| Subtraction | 15 | 16 | 17 | 18 | 19 |
| 9 | 15-9 = 6 | 16-9 = 7 | 17-9 = 8 | 18-9 = 9 | 19-9 = 10 |
| 10 | 15-10 = 5 | 16-10 = 6 | 17-10 = 7 | 18-10 = 8 | 19-10 = 9 |
| 11 | 15-11 = 4 | 16-11 = 5 | 17-11 = 6 | 18-11 = 7 | 19-11 = 8 |
| 12 | 15-12 = 3 | 16-12 = 4 | 17-12 = 5 | 18-12 = 6 | 19-12 = 7 |
| 13 | 15-13 = 2 | 16-13 = 3 | 17-13 = 4 | 18-13 = 5 | 19-13 = 6 |
| Subtraction | 14.1 | 14.2 | 14.3 | 14.4 | 14.5 | 14.6 |
| 8.1 | 14.1-8.1 = 6 | 14.2-8.1 = 6.1 | 14.3-8.1 = 6.2 | 14.4-8.1 = 6.3 | 14.5-8.1 = 6.4 | 14.6-8.1 = 6.5 |
| 8.2 | 14.1-8.2 = 5.9 | 14.2-8.2 = 6 | 14.3-8.2 = 6.1 | 14.4-8.2 = 6.2 | 14.5-8.2 = 6.3 | 14.6-8.2 = 6.4 |
| 8.3 | 14.1-8.3 = 5.8 | 14.2-8.3 = 5.9 | 14.3-8.3 = 6 | 14.4-8.3 = 6.1 | 14.5-8.3 = 6.2 | 14.6-8.3 = 6.3 |
| 8.4 | 14.1-8.4 = 5.7 | 14.2-8.4 = 5.8 | 14.3-8.4 = 5.9 | 14.4-8.4 = 6 | 14.5-8.4 = 6.1 | 14.6-8.4 = 6.2 |
| 8.5 | 14.1-8.5 = 5.6 | 14.2-8.5 = 5.7 | 14.3-8.5 = 5.8 | 14.4-8.5 = 5.9 | 14.5-8.5 = 6 | 14.6-8.5 = 6.1 |
| 8.6 | 14.1-8.6 = 5.5 | 14.2-8.6 = 5.6 | 14.3-8.6 = 5.7 | 14.4-8.6 = 5.8 | 14.5-8.6 = 5.9 | 14.6-8.6 = 6 |