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