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