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