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