Завдання 1301 - 1402 » 1349

Виконай дії: 1) 31/3 · (–23/4 : 51/2) = 31/3 · (–(11 ∙ 2)/(4 ∙ 11)) = 31/3 · (–1/2) = – (10 ∙ 1)/(3 ∙ 2) = – 5/3 = –12/3; 2) 22/5 : (111/15 – 32/5) · (–5/6) = 11/5; 1) 111/15 – 32/5 = –(27/5 – 111/15) = –1(21 - 11)/15 = –110/15 = –12/3; 2) 22/5 : (–12/3) = – (12 ∙ 3)/(5 ∙ 5) = – 36/25; 3) – 36/25 · (–5/6) = 6/5 = 11/5; 3) (63,45 : (–4,7) + 9,3) : (–41/5)= (–13,5 + 9,3) : (–41/5) – 4,2 : (–4,2) = 1 4) (–502/5 : (–5,6) + 6,4) : (–12/5) = –11; 1) –502/5 : (–5,6) = –50,4 : (–5,6) = 9; 2) 9 + 6,4 = 15,4; 3) 15,4 : (–1,4) = –11.