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