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