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