Erbijsommen t/m 40
Optellen
| 1. | 20 + 9 = |
29
|
22
|
45
|
43
|
| 2. | 15 + 11 = |
26
|
49
|
40
|
27
|
| 3. | 10 + 8 = |
13
|
18
|
10
|
16
|
| 4. | 5 + 1 = |
9
|
1
|
5
|
6
|
| 5. | 17 + 11 = |
29
|
44
|
32
|
28
|
| 6. | 19 + 14 = |
33
|
36
|
37
|
28
|
| 7. | 14 + 9 = |
30
|
49
|
23
|
25
|
| 8. | 10 + 6 = |
20
|
12
|
16
|
13
|
| 9. | 20 + 11 = |
38
|
29
|
31
|
44
|
| 10. | 5 + 2 = |
10
|
5
|
7
|
6
|
| 11. | 8 + 7 = |
12
|
15
|
17
|
20
|
| 12. | 14 + 10 = |
24
|
35
|
40
|
48
|