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