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