Erbijsommen t/m 30
Optellen
| 1. | 10 + 8 = |
20
|
16
|
18
|
11
|
| 2. | 12 + 4 = |
10
|
13
|
16
|
19
|
| 3. | 15 + 8 = |
23
|
45
|
29
|
31
|
| 4. | 9 + 8 = |
15
|
17
|
16
|
14
|
| 5. | 11 + 10 = |
36
|
21
|
30
|
40
|
| 6. | 9 + 7 = |
18
|
13
|
20
|
16
|
| 7. | 10 + 7 = |
17
|
18
|
13
|
20
|
| 8. | 12 + 2 = |
11
|
12
|
14
|
10
|
| 9. | 1 + 1 = |
1
|
6
|
8
|
2
|
| 10. | 14 + 10 = |
24
|
50
|
27
|
23
|
| 11. | 8 + 2 = |
10
|
4
|
1
|
6
|
| 12. | 13 + 6 = |
20
|
12
|
18
|
19
|