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