Розділ 1. ЦІЛІ ВИРАЗИ » 168

Обчисли. а) (3/8)15 • (8/3)13 = (3/8)2 •(3/8 • 8/3)13 = 9/64 •1 = 9/64; б) 612 • (–1/6)14 = (6/1)12 • (1/6)14 = (6/1 • 1/6)12 • (1/6)2 = 1 • 1/36 = 1/36; в) (–5/9)13 • (–14/5)14 = (–5/9)13 • (–9/5)14 = (–5/9 • (–9/5))13 • (–9/5) = 1 • (–9/5) = –9/5 = –14/5; г) (0,7)7 • 63 • (–5)7 = (–0,2 • (–5))7 • 216 = 1 • 216 = 216; ґ) 2,59 • 0,73 • 0,49 = (2,5 • 0,4)9 • 0,343 = 1 • 0,343 = 0,343; д) 0,2512 • 54 • 412 = (0,25 • 4)12 • 54 = 1 • 54 = 1 • 625 = 625.