Erafsommen t/m 20
Aftrekken
| 1. | 13 - 8 = |
8
|
3
|
9
|
5
|
| 2. | 13 - 3 = |
5
|
10
|
3
|
9
|
| 3. | 9 - 7 = |
2
|
5
|
7
|
9
|
| 4. | 19 - 15 = |
5
|
4
|
3
|
10
|
| 5. | 18 - 4 = |
20
|
14
|
13
|
10
|
| 6. | 8 - 6 = |
5
|
2
|
3
|
9
|
| 7. | 12 - 9 = |
3
|
1
|
7
|
9
|
| 8. | 8 - 6 = |
9
|
2
|
7
|
5
|
| 9. | 15 - 14 = |
3
|
1
|
2
|
9
|
| 10. | 19 - 5 = |
11
|
14
|
10
|
17
|
| 11. | 18 - 11 = |
8
|
2
|
9
|
7
|
| 12. | 16 - 12 = |
4
|
8
|
7
|
1
|