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