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