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