Дроби сокращены:
10 24-тых = 10/24 = 5/1221 54-тых = 21/54 = 7/1830 54-тых = 30/54 = 5/922 30-тых = 22/30 = 11/1528 40-10 75-тых = 28 + 40 - 10*75 = 28 + 40 - 750 = -682
Теперь подставляем значения:
5/12 - 7/18 = (53)/(123) - (72)/(182) = 15/36 - 14/36 = 1/365/9 + 11/15 = (55)/(95) + (113)/(153) = 25/45 + 33/45 = 58/45-682
Дроби сокращены:
10 24-тых = 10/24 = 5/12
21 54-тых = 21/54 = 7/18
30 54-тых = 30/54 = 5/9
22 30-тых = 22/30 = 11/15
28 40-10 75-тых = 28 + 40 - 10*75 = 28 + 40 - 750 = -682
Теперь подставляем значения:
5/12 - 7/18 = (53)/(123) - (72)/(182) = 15/36 - 14/36 = 1/36
5/9 + 11/15 = (55)/(95) + (113)/(153) = 25/45 + 33/45 = 58/45
-682