Вправи 1001 - 1100 » 1014

Виконайте дії: 1) 47/12 ∙ (–13/11) – (–11/15) ∙ (–45/64) = 55/12 ∙ (–14/11) – 16/15 ∙ 45/64 = – 35/6 – 3/4 = –510/12 – 9/12 = –519/12 = –67/12; 2) – 81/88 ∙ (–6 + (–113/15) ∙ (–119/21)) = – 81/88 ∙ (–6 + 28/15 ∙ 40/21) = –81/88 ∙ (–6 + 32/9) = – 81/88 ∙ (–6 + 35/9) = – 81/88 ∙ (–24/9) = – 81/88 ∙ (–22/9) = 9/4 = 21/4; 3) (–4/5 – 4/7) ∙ (57/9 – 711/12) = – 48/35 ∙ (528/36 – 733/36) = – 48/35 ∙ (–25/36) = 48/36 ∙ 77/36 = 44/15 = 214/15; 4) (– 11/18 + (–22/9) ∙ (–0,2))3 ∙ (–1,2) = (–11/18 + 20/9 ∙ 1/5)3 ∙ (–6/5) = (–11/18 + 4/9)3 ∙ (–6/5) = (–1/6)3 ∙ (–6/5) = – 1/216 ∙ (–6/5) = 1/180.