Erbijsommen t/m 20
Optellen
| 1. | 7 + 3 = |
8
|
5
|
4
|
10
|
| 2. | 5 + 3 = |
3
|
8
|
5
|
7
|
| 3. | 8 + 8 = |
10
|
17
|
15
|
16
|
| 4. | 10 + 9 = |
13
|
15
|
20
|
19
|
| 5. | 3 + 3 = |
6
|
2
|
4
|
7
|
| 6. | 10 + 8 = |
10
|
16
|
18
|
15
|
| 7. | 10 + 9 = |
17
|
14
|
10
|
19
|
| 8. | 9 + 9 = |
13
|
20
|
17
|
18
|
| 9. | 4 + 2 = |
4
|
6
|
7
|
9
|
| 10. | 7 + 2 = |
9
|
2
|
10
|
1
|
| 11. | 9 + 5 = |
16
|
19
|
14
|
20
|
| 12. | 7 + 2 = |
1
|
6
|
4
|
9
|