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