Odpowiedź:
1/2 - 1/4 = 2/4 - 1/4 = 1/4
5/6 - 2/3 = 5/6 - 4/6 = 1/6
3/4 - 3/8 = 6/8 - 3/8 = 3/8
3 i 5/9 - 1/6 = 3 i 10/18 - 3/18 = 3 i 7/18
1 i 3/4 - 5/6 = 1 i 9/12 - 10/12 = 21/12 - 10/12 = 11/12
2 i 1/9 - 1 i 5/6 = 2 i 2/18 - 1 i 15/18 = 1 i 20/18 - 1 i 15/18 = 5/18
7/8 - 1/4 - 1/2 = 7/8 - 2/8 - 4/8 = 5/8 - 4/8 = 1/8
2 i 3/7 - 3/4 - 1 i 1/2 = 2 i 12/28 - 21/28 - 1 i 14/28 = 1 i 40/28 - 21/28 - 1 i 14/28 = 1 i 19/28 - 1 i 14/28 = 5/28
2 i 5/6 - 7/8 - 1 i 1/4 = 2 i 20/24 - 21/24 - 1 i 6/24 = 1 i 44/24 - 21/24 - 1 i 6/24 = 1 i 23/24 - 1 i 6/24 = 17/24
3 i 11/12 - 5/9 - 1 i 3/4 = 3 i 33/36 - 20/36 - 1 i 27/36 = 3 i 13/36 - 1 i 27/36 = 2 i 49/36 - 1 i 27/36 = 1 i 22/36 = 1 i 11/18
10 - 3 i 1/4 - 1 i 3/5 = 10 - 3 i 5/20 - 1 i 12/20 = 9 i 20/20 - 3 i 5/20 - 1 i 12/20 = 6 i 15/20 - 1 i 12/20 = 5 i 3/20
7 - 2 i 1/2 - 1 i 4/5 = 7 - 2 i 5/10 - 1 i 8/10 = 6 i 10/10 - 2 i 5/10 - 1 i 8/10 = 4 i 5/10 - 1 i 8/10 = 3 i 15/10 - 1 i 8/10 = 2 i 7/10
