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