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