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