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