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