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