| 13 − 0 = | 18 − 13 = | 17 − 11 = | 17 − 5 = | ||||
| 15 − 14 = | 3 + 17 = | 0 + 5 = | 15 + 2 = | ||||
| 13 + 1 = | 3 + 11 = | 1 + 12 = | 9 − 3 = | ||||
| 18 − 7 = | 1 + 17 = | 2 + 17 = | 16 + 4 = | ||||
| 12 − 6 = | 3 + 13 = | 4 + 14 = | 18 + 2 = | ||||
| 19 − 16 = | 9 + 7 = | 16 − 15 = | 13 − 7 = | ||||
| 1 + 1 = | 7 + 13 = | 9 + 4 = | 2 + 7 = | ||||
| 16 − 12 = | 6 + 11 = | 19 − 19 = | 8 + 11 = | ||||
| 19 − 11 = | 11 + 5 = | 1 + 8 = | 17 − 4 = | ||||
| 14 − 8 = | 4 + 9 = | 13 − 10 = | 12 + 8 = | ||||
| 8 + 2 = | 17 − 9 = | 12 + 7 = | 10 + 1 = | ||||
| 15 − 2 = | 3 + 10 = | 15 + 5 = | 20 − 6 = | ||||
| 13 + 6 = | 3 + 9 = | 11 + 9 = | 13 − 11 = | ||||
| 1 + 4 = | 16 − 8 = | 3 + 8 = | 8 + 4 = | ||||
| 5 + 8 = | 8 − 1 = | 5 − 4 = | 7 + 9 = | ||||
| 12 − 11 = | 5 + 5 = | 5 + 10 = | 12 − 9 = | ||||
| 4 + 2 = | 8 − 4 = | 10 + 5 = | 2 − 2 = | ||||
| 13 − 3 = | 8 + 12 = | 18 − 18 = | 2 + 6 = | ||||
| 20 − 19 = | 2 + 4 = | 7 − 5 = | 3 + 2 = | ||||
| 19 − 6 = | 11 + 7 = | 6 − 3 = | 5 + 2 = | ||||
| 1 + 19 = | 16 − 7 = | 15 − 4 = | 3 + 15 = | ||||
| 6 − 4 = | 12 − 1 = | 7 + 2 = | 2 + 16 = | ||||
| 9 + 2 = | 16 − 14 = | 18 − 6 = | 10 − 3 = | ||||
| 17 − 3 = | 7 − 1 = | 19 − 3 = | 20 − 4 = | ||||
| 13 − 4 = | 18 − 14 = | 20 − 10 = | 14 − 1 = | ||||
| 49 − | 51 + | getallen t/m 20 | |||||||