Erafsommen t/m 20
Aftrekken
| 1. | 19 - 11 = |
9
|
8
|
4
|
7
|
| 2. | 14 - 1 = |
10
|
15
|
14
|
13
|
| 3. | 15 - 5 = |
7
|
3
|
9
|
10
|
| 4. | 18 - 16 = |
9
|
1
|
2
|
8
|
| 5. | 20 - 16 = |
8
|
1
|
4
|
10
|
| 6. | 19 - 11 = |
4
|
8
|
7
|
1
|
| 7. | 3 - 2 = |
1
|
8
|
10
|
3
|
| 8. | 13 - 6 = |
3
|
8
|
6
|
7
|
| 9. | 16 - 6 = |
3
|
5
|
10
|
9
|
| 10. | 10 - 10 = |
0
|
3
|
9
|
1
|
| 11. | 19 - 14 = |
5
|
3
|
2
|
7
|
| 12. | 9 - 2 = |
7
|
1
|
6
|
3
|