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