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