Erbijsommen t/m 40
Optellen
| 1. | 18 + 16 = |
49
|
27
|
34
|
50
|
| 2. | 15 + 7 = |
43
|
46
|
22
|
37
|
| 3. | 14 + 4 = |
10
|
18
|
20
|
11
|
| 4. | 14 + 1 = |
19
|
13
|
15
|
12
|
| 5. | 18 + 7 = |
46
|
27
|
25
|
44
|
| 6. | 11 + 10 = |
30
|
25
|
21
|
23
|
| 7. | 19 + 1 = |
20
|
19
|
11
|
17
|
| 8. | 9 + 3 = |
20
|
10
|
19
|
12
|
| 9. | 11 + 8 = |
13
|
19
|
10
|
12
|
| 10. | 9 + 5 = |
14
|
17
|
19
|
15
|
| 11. | 14 + 4 = |
11
|
19
|
18
|
17
|
| 12. | 18 + 12 = |
25
|
34
|
39
|
30
|