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