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