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