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