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