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