Вправа 401 - 500 » 445

445. Знайди значення виразу. a) 7 • 14–1 = 7 • 1/14 = 7/14 = 1/2; б) –2–4 • 48 = –1/2^4 • 48 = –48/16 = –3; в) (–4)–3 : 1/8 = –1/64 • 8/1 = –1/8; г) 10 : (–5)–2 = 10 : 1/25 = 250; ґ) (–3/4)–3 : 2/9 = –(27/64)–1 • 9/2 = –(64•9)/(27•2) = –32/3 = –102/3; д) (1,5)–3 • (3/2)4 = (2/3)3 • (3/2)4 = (2/3 • 3/2)3 • 3/2 = 3/2 = 1,5.