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