Erbijsommen t/m 30
Optellen
| 1. | 7 + 4 = |
12
|
13
|
11
|
20
|
| 2. | 9 + 4 = |
13
|
10
|
19
|
14
|
| 3. | 5 + 3 = |
1
|
7
|
9
|
8
|
| 4. | 10 + 1 = |
17
|
11
|
15
|
10
|
| 5. | 4 + 3 = |
10
|
8
|
7
|
3
|
| 6. | 15 + 2 = |
15
|
18
|
17
|
20
|
| 7. | 13 + 5 = |
11
|
20
|
18
|
17
|
| 8. | 15 + 10 = |
31
|
44
|
35
|
25
|
| 9. | 14 + 11 = |
26
|
25
|
46
|
40
|
| 10. | 10 + 10 = |
10
|
19
|
20
|
11
|
| 11. | 12 + 11 = |
23
|
42
|
41
|
30
|
| 12. | 9 + 8 = |
13
|
18
|
15
|
17
|