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