Odpowiedź:
6/5 - 7/15 + 2/3 = 18/15 - 7/15 + 10/15 = 11/15 + 10/15 = 21/15 = 1 i 6/15 = 1 i 2/5
1 i 1/4 - 2/3 + 2 i 5/6 = 1 i 6/24 - 16/24 + 2 i 20/24 = 30/24 - 16/24 + 2 i 20/24 = 14/24 + 2 i 20/24 = 2 i 34/24 = 3 i 10/24 = 3 i 5/12
7 i 10/35 + 5 i 4/7 - 3 i 2/5 = 7 i 10/35 + 5 i 20/35 - 3 i 14/35 = 12 i 30/35 - 3 i 14/35 = 9 i 16/35
1 i 13/25 + 17/25 - 1 i 4/5 = 1 i 30/25 - 1 i 20/25 = 10/25 = 2/5
