Вправи 201 - 300 » 287

Виконайте дії: 1) 55/9 + 31/6 – 64/27 = 2 + (5/9 + 1/6 – 4/27) = 2 + (5 • 6 + 1 • 9 - 4 • 2)/54 = 231/54. 2) 1213/48 – (917/32 – 45/24) = 1213/48 – (5 + (17/32 – 5/24)) = 1213/48 – (5 + (17 • 3 - 5 • 4)/96) = 1213/48 – 531/96 = 1226/96 = 1226/96 – 531/96 = 11122/96 – 531/96 = 691/96.