Erafsommen t/m 12
Aftrekken
| 1. | 2 - 1 = |
1
|
6
|
2
|
7
|
| 2. | 6 - 2 = |
7
|
2
|
4
|
1
|
| 3. | 10 - 9 = |
10
|
6
|
7
|
1
|
| 4. | 4 - 3 = |
4
|
6
|
1
|
10
|
| 5. | 8 - 2 = |
5
|
10
|
6
|
2
|
| 6. | 10 - 10 = |
0
|
5
|
3
|
4
|
| 7. | 12 - 10 = |
2
|
10
|
3
|
7
|
| 8. | 9 - 9 = |
3
|
0
|
10
|
2
|
| 9. | 11 - 1 = |
10
|
6
|
3
|
9
|
| 10. | 12 - 6 = |
10
|
6
|
3
|
7
|
| 11. | 11 - 6 = |
3
|
5
|
4
|
8
|
| 12. | 8 - 6 = |
6
|
7
|
2
|
4
|