Вправи 1201 - 1300 » 1268 (1-2)

Знайдіть значення виразу: 1) (31/4 + 0,25 – 15/24) : (23/4 – 41/2 – 0,75) : (–47/12) = (31/4 + 1/4 – 15/24) : (23/4 – 41/2 – 3/4) : (–55/12) = (236/24 – 15/24) : (2 – 41/2) ∙ (–12/55) = 27/24 : (–21/2) ∙ (–12/55) = 55/24 ∙ (–2/5) ∙ (–12/55) = (–12/55) = 55/24 ∙ 2/5 ∙ 12/55 = 1/5. 2) –24,6 : (–2,35 + 0,7 : 21/3) – 15,36 = –24,6 : (–2,35 + 7/10 ∙ 3/7) – 15,36 = –24,6 : (–2,36 + 0,3) – 15,36 = –24,6 : (–2,05) – 15,36 = 12 – 15,36 = –3,36.