Erafsommen t/m 20
Aftrekken
| 1. | 18 - 14 = |
2
|
1
|
5
|
4
|
| 2. | 12 - 9 = |
7
|
3
|
6
|
4
|
| 3. | 20 - 1 = |
10
|
13
|
19
|
12
|
| 4. | 14 - 2 = |
20
|
14
|
12
|
10
|
| 5. | 19 - 1 = |
13
|
10
|
19
|
18
|
| 6. | 10 - 2 = |
2
|
9
|
1
|
8
|
| 7. | 20 - 4 = |
20
|
15
|
16
|
17
|
| 8. | 16 - 4 = |
18
|
20
|
17
|
12
|
| 9. | 20 - 12 = |
4
|
8
|
9
|
7
|
| 10. | 18 - 14 = |
4
|
3
|
10
|
5
|
| 11. | 18 - 16 = |
4
|
5
|
2
|
10
|
| 12. | 5 - 5 = |
10
|
0
|
4
|
1
|