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