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