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