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