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