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