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