Erbijsommen t/m 30
Optellen
| 1. | 15 + 5 = |
15
|
10
|
11
|
20
|
| 2. | 7 + 2 = |
9
|
7
|
1
|
5
|
| 3. | 13 + 8 = |
21
|
27
|
38
|
43
|
| 4. | 15 + 3 = |
13
|
15
|
18
|
16
|
| 5. | 13 + 7 = |
12
|
15
|
20
|
16
|
| 6. | 12 + 12 = |
42
|
33
|
47
|
24
|
| 7. | 9 + 6 = |
19
|
15
|
12
|
17
|
| 8. | 14 + 4 = |
18
|
19
|
15
|
16
|
| 9. | 10 + 6 = |
12
|
16
|
20
|
11
|
| 10. | 6 + 6 = |
14
|
20
|
15
|
12
|
| 11. | 4 + 1 = |
6
|
7
|
10
|
5
|
| 12. | 12 + 3 = |
15
|
13
|
19
|
11
|