| Addition | 9 | 10 | 11 | 12 | 13 |
| 11 | 9+11 = 20 | 10+11 = 21 | 11+11 = 22 | 12+11 = 23 | 13+11 = 24 |
| 12 | 9+12 = 21 | 10+12 = 22 | 11+12 = 23 | 12+12 = 24 | 13+12 = 25 |
| 13 | 9+13 = 22 | 10+13 = 23 | 11+13 = 24 | 12+13 = 25 | 13+13 = 26 |
| 14 | 9+14 = 23 | 10+14 = 24 | 11+14 = 25 | 12+14 = 26 | 13+14 = 27 |
| 15 | 9+15 = 24 | 10+15 = 25 | 11+15 = 26 | 12+15 = 27 | 13+15 = 28 |