1) 5/6 - 2/3 = (53)/(63) - (22)/(32) = 15/18 - 4/18 = 11/18
Проверка: 11/18 + 2/3 = (112)/(182) + (26)/(36) = 22/36 + 12/36 = 34/36 = 17/18
2) 17/18 - 5/6 = (173)/(183) - (53)/(63) = 51/54 - 15/54 = 36/54 = 2/3
Проверка: 2/3 + 5/6 = (22)/(32) + (53)/(63) = 4/6 + 15/18 = 4/6 + 10/18 = 8/12 + 10/12 = 18/12 = 3/2 = 1.5
3) 5/8 - 5/24 = (53)/(83) - 5/24 = 15/24 - 5/24 = 10/24 = 5/12
Проверка: 5/12 + 5/24 = (52)/(122) + 5/24 = 10/24 + 5/24 = 15/24 = 5/8
4) 1/2 - 3/10 = (15)/(25) - 3/10 = 5/10 - 3/10 = 2/10 = 1/5
Проверка: 1/5 + 3/10 = (12)/(52) + 3/10 = 2/10 + 3/10 = 5/10 = 1/2
1) 5/6 - 2/3 = (53)/(63) - (22)/(32) = 15/18 - 4/18 = 11/18
Проверка: 11/18 + 2/3 = (112)/(182) + (26)/(36) = 22/36 + 12/36 = 34/36 = 17/18
2) 17/18 - 5/6 = (173)/(183) - (53)/(63) = 51/54 - 15/54 = 36/54 = 2/3
Проверка: 2/3 + 5/6 = (22)/(32) + (53)/(63) = 4/6 + 15/18 = 4/6 + 10/18 = 8/12 + 10/12 = 18/12 = 3/2 = 1.5
3) 5/8 - 5/24 = (53)/(83) - 5/24 = 15/24 - 5/24 = 10/24 = 5/12
Проверка: 5/12 + 5/24 = (52)/(122) + 5/24 = 10/24 + 5/24 = 15/24 = 5/8
4) 1/2 - 3/10 = (15)/(25) - 3/10 = 5/10 - 3/10 = 2/10 = 1/5
Проверка: 1/5 + 3/10 = (12)/(52) + 3/10 = 2/10 + 3/10 = 5/10 = 1/2