| Subtraction | 8 | 9 | 10 | 11 | 12 |
| 12 | 8-12 = -4 | 9-12 = -3 | 10-12 = -2 | 11-12 = -1 | 12-12 = 0 |
| 13 | 8-13 = -5 | 9-13 = -4 | 10-13 = -3 | 11-13 = -2 | 12-13 = -1 |
| 14 | 8-14 = -6 | 9-14 = -5 | 10-14 = -4 | 11-14 = -3 | 12-14 = -2 |
| 15 | 8-15 = -7 | 9-15 = -6 | 10-15 = -5 | 11-15 = -4 | 12-15 = -3 |
| 16 | 8-16 = -8 | 9-16 = -7 | 10-16 = -6 | 11-16 = -5 | 12-16 = -4 |
| Subtraction | 7.1 | 7.2 | 7.3 | 7.4 | 7.5 | 7.6 |
| 11.1 | 7.1-11.1 = -4 | 7.2-11.1 = -3.9 | 7.3-11.1 = -3.8 | 7.4-11.1 = -3.7 | 7.5-11.1 = -3.6 | 7.6-11.1 = -3.5 |
| 11.2 | 7.1-11.2 = -4.1 | 7.2-11.2 = -4 | 7.3-11.2 = -3.9 | 7.4-11.2 = -3.8 | 7.5-11.2 = -3.7 | 7.6-11.2 = -3.6 |
| 11.3 | 7.1-11.3 = -4.2 | 7.2-11.3 = -4.1 | 7.3-11.3 = -4 | 7.4-11.3 = -3.9 | 7.5-11.3 = -3.8 | 7.6-11.3 = -3.7 |
| 11.4 | 7.1-11.4 = -4.3 | 7.2-11.4 = -4.2 | 7.3-11.4 = -4.1 | 7.4-11.4 = -4 | 7.5-11.4 = -3.9 | 7.6-11.4 = -3.8 |
| 11.5 | 7.1-11.5 = -4.4 | 7.2-11.5 = -4.3 | 7.3-11.5 = -4.2 | 7.4-11.5 = -4.1 | 7.5-11.5 = -4 | 7.6-11.5 = -3.9 |
| 11.6 | 7.1-11.6 = -4.5 | 7.2-11.6 = -4.4 | 7.3-11.6 = -4.3 | 7.4-11.6 = -4.2 | 7.5-11.6 = -4.1 | 7.6-11.6 = -4 |