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