Odpowiedź:
4 i 1/4 - 2 i 2/3 = 4 i 3/12 - 2 i 8/12 = 3 i 15/12 - 2 i 8/12 = 1 i 7/12
5 i 1/9 - 1 i 5/6 = 5 i 2/18 - 1 i 15/18 = 4 i 20/18 - 1 i 15/18 = 3 i 5/18
3 i 1/15 - 1 i 1/10 = 3 i 2/30 - 1 i 3/30 = 2 i 32/30 - 1 i 3/30 = 1 i 29/30
5 i 5/13 - 3 i 1/2 = 5 i 10/26 - 3 i 13/26 = 4 i 36/26 - 3 i 13/26 = 1 i 23/26
