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