Erafsommen t/m 20 (meerkeuze)
Aftrekken
| 1. | 11 - 8 = |
3
|
8
|
1
|
7
|
| 2. | 17 - 8 = |
9
|
8
|
1
|
6
|
| 3. | 17 - 16 = |
10
|
1
|
5
|
2
|
| 4. | 12 - 10 = |
1
|
4
|
2
|
7
|
| 5. | 20 - 18 = |
2
|
10
|
8
|
4
|
| 6. | 13 - 12 = |
2
|
3
|
1
|
6
|
| 7. | 6 - 5 = |
4
|
5
|
1
|
7
|
| 8. | 9 - 7 = |
4
|
10
|
3
|
2
|
| 9. | 10 - 8 = |
10
|
6
|
7
|
2
|
| 10. | 14 - 12 = |
2
|
7
|
9
|
1
|
| 11. | 15 - 10 = |
8
|
5
|
7
|
4
|
| 12. | 18 - 16 = |
4
|
9
|
3
|
2
|