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