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