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