Odpowiedź:
6 i 1/2 - 2 i 3/5 - 1 i 2/3 = 6 i 15/30 - 2 i 18/30 - 1 i 20/30 = 5 i 45/30 - 2 i 18/30 - 1 i 20/30 = 3 i 27/30 - 1 i 20/30 = 2 i 7/30
1 i 7/8 + 2 i 1/4 = 1 i 7/8 + 2 i 2/8 = 3 i 9/8 = 4 i 1/8
2 i 1/6 + 1 i 3/4 = 2 i 2/12 + 1 i 9/12 = 3 i 11/12
3 i 4/5 + 2 i 2/5 + 3/5 = 5 i 9/5 = 6 i 4/5
9 i 1/2 - 1 i 3/8 = 9 i 4/8 - 1 i 3/8 = 8 i 1/8
4 i 1/6 - 3 i 5/6 = 3 i 7/6 - 3 i 5/6 = 2/6 = 1/3
