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