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