Вправи 1101 - 1200 » 1115

Виконайте дії: 1) 3/8 : (–5/8) – (–21/4) : (–14/11) = 3/8 ∙ (–8/5) – 9/4 : 15/11 = – 3/5 – 9/4 ∙ 11/15 = –3/5 – 33/20 = –45/20 = –9/4 = –21/4; 2) (11/14 – 5/6) : (11/14 – 3/4) = (33/42 – 35/42) : (22/28 – 21/28) = –2/42 : 1/28 = –28/21 = –4/3 = –11/3.