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