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