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