Erbijsommen t/m 40
Optellen
| 1. | 15 + 2 = |
13
|
15
|
19
|
17
|
| 2. | 18 + 8 = |
43
|
23
|
26
|
27
|
| 3. | 13 + 7 = |
16
|
20
|
10
|
17
|
| 4. | 18 + 16 = |
21
|
34
|
39
|
33
|
| 5. | 16 + 10 = |
44
|
32
|
41
|
26
|
| 6. | 18 + 7 = |
49
|
20
|
39
|
25
|
| 7. | 17 + 14 = |
49
|
31
|
45
|
23
|
| 8. | 16 + 14 = |
34
|
40
|
30
|
27
|
| 9. | 12 + 9 = |
23
|
43
|
21
|
25
|
| 10. | 10 + 7 = |
15
|
19
|
17
|
13
|
| 11. | 18 + 5 = |
21
|
35
|
23
|
25
|
| 12. | 11 + 4 = |
15
|
13
|
17
|
19
|