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