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