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