Oefen de erafsommen tot 20
Erafsommen
|
1.
17 – 2 =
20
15
5
6
|
2.
3 – 0 =
6
1
8
3
|
3.
1 – 0 =
5
1
4
2
|
4.
4 – 3 =
2
5
1
4
|
|
5.
10 – 6 =
5
4
6
9
|
6.
2 – 0 =
4
2
1
3
|
7.
15 – 3 =
1
15
17
12
|
8.
2 – 0 =
7
2
5
6
|
|
9.
13 – 11 =
6
7
1
2
|
10.
10 – 5 =
5
8
10
4
|
11.
1 – 1 =
4
0
1
2
|
12.
5 – 2 =
4
3
1
2
|
|
13.
19 – 1 =
10
1
18
21
|
14.
4 – 2 =
4
2
6
7
|
15.
6 – 1 =
9
5
4
6
|
16.
20 – 19 =
4
1
2
6
|
|
17.
19 – 1 =
10
11
18
23
|
18.
11 – 1 =
15
3
10
6
|
19.
7 – 3 =
7
5
6
4
|
20.
11 – 9 =
1
2
4
7
|