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