Reken de erbijsom tot 20 uit
Erbijsommen
|
1.
12 + 0 =
|
2.
9 + 7 =
|
3.
12 + 5 =
|
|
4.
17 + 0 =
|
5.
13 + 6 =
|
6.
9 + 4 =
|
|
7.
19 + 1 =
|
8.
18 + 0 =
|
9.
12 + 2 =
|
|
10.
3 + 2 =
|
11.
14 + 4 =
|
12.
1 + 16 =
|
|
13.
8 + 11 =
|
14.
8 + 1 =
|
15.
18 + 0 =
|
|
16.
3 + 1 =
|
17.
2 + 5 =
|
18.
1 + 4 =
|
|
19.
6 + 13 =
|
20.
12 + 6 =
|
21.
4 + 14 =
|
|
22.
5 + 9 =
|
23.
13 + 2 =
|
24.
20 + 0 =
|
|
25.
19 + 1 =
|
26.
12 + 7 =
|
27.
2 + 7 =
|
|
28.
10 + 2 =
|
29.
16 + 4 =
|
30.
11 + 4 =
|
|
31.
6 + 10 =
|
32.
19 + 1 =
|
33.
4 + 10 =
|