| Subtraction | 16 | 17 | 18 | 19 | 20 |
| 10 | 16-10 = 6 | 17-10 = 7 | 18-10 = 8 | 19-10 = 9 | 20-10 = 10 |
| 11 | 16-11 = 5 | 17-11 = 6 | 18-11 = 7 | 19-11 = 8 | 20-11 = 9 |
| 12 | 16-12 = 4 | 17-12 = 5 | 18-12 = 6 | 19-12 = 7 | 20-12 = 8 |
| 13 | 16-13 = 3 | 17-13 = 4 | 18-13 = 5 | 19-13 = 6 | 20-13 = 7 |
| 14 | 16-14 = 2 | 17-14 = 3 | 18-14 = 4 | 19-14 = 5 | 20-14 = 6 |
| Subtraction | 15.1 | 15.2 | 15.3 | 15.4 | 15.5 | 15.6 |
| 9.1 | 15.1-9.1 = 6 | 15.2-9.1 = 6.1 | 15.3-9.1 = 6.2 | 15.4-9.1 = 6.3 | 15.5-9.1 = 6.4 | 15.6-9.1 = 6.5 |
| 9.2 | 15.1-9.2 = 5.9 | 15.2-9.2 = 6 | 15.3-9.2 = 6.1 | 15.4-9.2 = 6.2 | 15.5-9.2 = 6.3 | 15.6-9.2 = 6.4 |
| 9.3 | 15.1-9.3 = 5.8 | 15.2-9.3 = 5.9 | 15.3-9.3 = 6 | 15.4-9.3 = 6.1 | 15.5-9.3 = 6.2 | 15.6-9.3 = 6.3 |
| 9.4 | 15.1-9.4 = 5.7 | 15.2-9.4 = 5.8 | 15.3-9.4 = 5.9 | 15.4-9.4 = 6 | 15.5-9.4 = 6.1 | 15.6-9.4 = 6.2 |
| 9.5 | 15.1-9.5 = 5.6 | 15.2-9.5 = 5.7 | 15.3-9.5 = 5.8 | 15.4-9.5 = 5.9 | 15.5-9.5 = 6 | 15.6-9.5 = 6.1 |
| 9.6 | 15.1-9.6 = 5.5 | 15.2-9.6 = 5.6 | 15.3-9.6 = 5.7 | 15.4-9.6 = 5.8 | 15.5-9.6 = 5.9 | 15.6-9.6 = 6 |