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