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