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