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