Odpowiedź:
3/4 + 5/8 = 6/8 + 5/8 = 11/8 = 1 i 3/8
3 i 1/2 + 4 i 5/6 = 3 i 3/6 + 4 i 5/6 = 7 i 8/6 = 7 i 2/6 = 7 i 1/3
2/3 + 3/5 = 10/15 + 9/15 = 19/15 = 1 i 4/15
2/3 - 3/5 = 10/15 - 9/15 = 1/15
1 i 2/7 - 1/2 = 1 i 4/14 - 7/14 = 18/14 - 7/14 = 11/14
2 i 3/4 - 5/12 = 2 i 9/12 - 5/12 = 2 i 4/12 = 2 i 1/3
6 i 1/6 - 3 i 3/8 = 6 i 4/24 - 3 i 9/24 = 5 i 28/24 - 3 i 9/24 = 2 i 19/24
9 i 5/8 - 5 i 7/10 = 9 i 25/40 - 5 i 28/40 = 8 i 65/40 - 5 i 28/40 = 3 i 37/40
