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