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