Erafsommen t/m 15
Aftrekken
| 1. | 2 - 2 = |
9
|
2
|
10
|
0
|
| 2. | 5 - 2 = |
9
|
4
|
3
|
10
|
| 3. | 4 - 2 = |
7
|
9
|
3
|
2
|
| 4. | 4 - 3 = |
8
|
1
|
4
|
7
|
| 5. | 5 - 4 = |
2
|
1
|
3
|
9
|
| 6. | 3 - 1 = |
4
|
2
|
3
|
1
|
| 7. | 5 - 2 = |
3
|
9
|
10
|
4
|
| 8. | 4 - 2 = |
7
|
5
|
4
|
2
|
| 9. | 4 - 1 = |
6
|
3
|
8
|
9
|
| 10. | 5 - 5 = |
10
|
9
|
0
|
4
|
| 11. | 5 - 3 = |
2
|
9
|
10
|
3
|
| 12. | 3 - 2 = |
1
|
4
|
3
|
6
|