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