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