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