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