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