Odpowiedź:
7/9 - 4/9 = 3/9
12/17 - 1/17 = 11/17
11/18 - 5/18 = 6/18
3 i 3/4 - 3/4 = 3
2 i 14/15 - 7/15 = 2 i 7/15
4 i 5/8 - 3/8 = 4 i 2/8
8 i 3/7 - 2 i 2/7 = 6 i 1/7
9 i 5/8 - 5 i 3/8 = 4 i 2/8
7 i 5/9 - 2 i 2/9 = 5 i 3/9
zad 2
2/7 - 1/7 = 1/7
8/11 - 1/11 = 7/11
3 i 3/7 - 1/7 = 3 i 2/7
2 i 4/5 - 1 i 3/5 = 1 i 1/5
2/3 - 2/3 = 0
17/31 - 0 = 17/31
zad 3
graf pierwszy 2 i 7/9, 1 i 2/9, 3 i 7/9, 2 i 3/9
graf drugi 2 i 3/11, 3 i 10/11, 1 i 2/11, 4 i 8/11
zad 4
7 i 9/11 - 3 i 3/11 = 4 i 6/11
15 i 7/13 - 8 i 4/13 = 7 i 3/13
