Reken de sommen tot 20 uit
Erbijsommen
|
1.
20 + 0 =
20
11
|
2.
8 + 11 =
19
4
|
3.
16 + 2 =
18
6
|
4.
20 + 0 =
20
8
|
|
5.
16 + 4 =
14
20
|
6.
12 + 6 =
18
4
|
7.
4 + 7 =
11
12
|
8.
11 + 0 =
16
11
|
|
9.
5 + 7 =
10
12
|
10.
7 + 10 =
17
10
|
11.
6 + 6 =
8
12
|
12.
6 + 1 =
7
11
|
|
13.
2 + 12 =
18
14
|
14.
11 + 2 =
13
9
|
15.
6 + 2 =
8
2
|
16.
14 + 4 =
8
18
|
|
17.
15 + 5 =
13
20
|
18.
16 + 3 =
19
7
|
19.
3 + 8 =
11
12
|
20.
3 + 17 =
11
20
|