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