Вправа 301 - 400 » 360

360. Обчисли. 1) (1/2 – 1/8) : (–2) – 161/4 : (–4) = 3/8 • (–1/2) – 65/4 • (–1/4) = –3/16 + 65/16 = 62/16 = 31/8 = 37/8; б) (–1/2 – 3/4) : (–3) + 1/3 – (–1/6) : (–2) = –5/4 • (–1/3) + 1/3 – 1/12 = 5/12 + 4/12 – 1/12 = 8/12 = 2/3.