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