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