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