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