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