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