2/5-1/5=1/5
15/23-13/23=2/23
3/7-2/7=1/7
1/4-1/4=0
4/5-2/5=2/5
10/11-4/11=6/11
7/9-2/9=5/9
12/33-7/33=5/33
Poziom B
1-7/8=1/8
1-20/23=3/23
1-4/7=3/7
1-3/4=1/4
1-7/10=3/10
1-6/11=5/11
1-5/12=7/12
1-17/33=16/33
Poziom C
11 3/4-7 1/4=4 2/4
5 4/7-3 2/7=2 2/7
3 33/37-1 1/37=2 32/37
3 4/9-1 4/9=1
24 2/3-13 1/3=11 1/3
23 19/33-1 9/33=22 10/33
9 5/12-2 4/12=7 1/12
1 11/13-1 1/13=10/13
Poziom D
5-1/5=4 4/5
6-13/23=5 10/23
2-2/7=1 5/7
7-1/4=6 3/4
3-2/5=2 3/5
4-4/11=3 7/11
8-5/9=7 4/9
2-4/33=1 29/33
Poziom E
12 3/5-5 4/5=6 4/5
5 4/7-4 6/7=5/7
11 13/17-2 15/17=8 15/17
3 1/4-2 3/4=2/4
15 1/3-13 2/3=1 2/3
5 4/11-2 9/11=2 6/11
24 3/9-7 8/9=16 4/9
21 2/33-2 12/33=18 23/33