Erbijsommen t/m 40
Optellen
| 1. | 20 + 8 = |
28
|
38
|
43
|
24
|
| 2. | 19 + 12 = |
30
|
38
|
31
|
36
|
| 3. | 19 + 4 = |
23
|
24
|
47
|
48
|
| 4. | 15 + 8 = |
30
|
41
|
43
|
23
|
| 5. | 16 + 5 = |
28
|
23
|
21
|
29
|
| 6. | 16 + 11 = |
48
|
21
|
22
|
27
|
| 7. | 13 + 11 = |
41
|
22
|
24
|
43
|
| 8. | 16 + 3 = |
20
|
11
|
18
|
19
|
| 9. | 17 + 8 = |
35
|
38
|
50
|
25
|
| 10. | 8 + 1 = |
9
|
4
|
1
|
5
|
| 11. | 13 + 3 = |
17
|
15
|
11
|
16
|
| 12. | 12 + 11 = |
35
|
23
|
22
|
29
|