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