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