| Vraag | Antwoord |
|---|---|
| 10 + 8 | 18 |
| 5 + 12 | 17 |
| 10 + 9 | 19 |
| 6 + 9 | 15 |
| 10 + 6 | 16 |
| 6 + 5 | 11 |
| 10 + 5 | 15 |
| 8 + 8 | 16 |
| 7 + 5 | 12 |
| 8 + 9 | 17 |
| 5 + 10 | 15 |
| 6 + 14 | 20 |
| 9 + 7 | 16 |
| 6 + 11 | 17 |
| 7 + 9 | 16 |
Optelsommen binnen 5–20.
| Vraag | Antwoord |
|---|---|
| 10 + 8 | 18 |
| 5 + 12 | 17 |
| 10 + 9 | 19 |
| 6 + 9 | 15 |
| 10 + 6 | 16 |
| 6 + 5 | 11 |
| 10 + 5 | 15 |
| 8 + 8 | 16 |
| 7 + 5 | 12 |
| 8 + 9 | 17 |
| 5 + 10 | 15 |
| 6 + 14 | 20 |
| 9 + 7 | 16 |
| 6 + 11 | 17 |
| 7 + 9 | 16 |