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