Завдання 1301 - 1402 » 1350

Обчисли: 1) –31/3 : (–11/4) : 8/25 = (10 ∙ 4 ∙ 25)/(3 ∙ 5 ∙ 8) = 25/3 = 81/3; 2) 18/9 : (13/4 – 31/6) · (–9/16); 1) 13/4 – 31/6 = –(27/6 – 13/4) = –1(14 - 9)/12 = –15/12; 2) 18/9 : (–15/12) – – (17 ∙ 12)/(9 ∙ 17) = – 12/9 = – 4/3; 3) – 4/3 · (–9/16) = (4 ∙ 9)/(3 ∙ 16) = 3/4; 3) (–48,75 : 3,9 + 81/5) · (–6,1) = (–12,5 + 8,2) · (–6,1) = –4,3 · · (–6,1) = 26,23; 4) (–1516/25 : 4,6 + 7,1) : (–0,37) = (–15,64 : 4,6 + 7,1) : (–0,37) = = (–3,4 + 7,1) : (–0,37) = 3,7 : (–0,37) = –10.