Odpowiedź:
3 i 3/4 - 1 i 2/3 - 1/2 = 3 i 9/12 - 1 i 8/12 - 6/12 = 2 i 1/12 - 6/12 = 1 i 13/12 - 6/12 = 1 i 7/12
2 i 8/9 - 2/3 + 7/18 = 2 i 16/18 - 12/18 + 7/18 = 2 i 4/18 + 7/18 = 2 i 11/18
4/5 : 1/9 = 4/5 * 9 = 36/5 = 7 i 1/5
7/8 : 3 i 3/4 = 7/8 * 4/15 = 7/30
2/3 : 5/7 = 2/3 * 7/5 = 14/15
(3/4 - 1/3) : (1 + 1/4) = (9/12 - 4/12) : 1 i 1/4 = 5/12 : 1 i 1/4 = 5/12 * 4/5 = 1/3
(4/5 * 2 i 6/7) : 4/5 - 1/4 = (4/5 * 20/7) : 4/5 - 1/4 = 16/7 * 5/4 - 1/4 = 20/7 - 1/4 = 2 i 6/7 - 1/4 = 2 i 24/28 - 7/28 = 2 i 17/28
