Вправи 301 - 400 » 348

348. Обчисліть: 1) (((5–1)–1)–1)–1 = 51 = 5; 2) (9–2)–1)0 = (9–2)0 = 1; 3) (((3–1)2)–1)2 = 34; 4) (((0,5–1)2)–1)–2 = 0,5–4 = (1/2)–4 = 24 = 16; 5) 3–1 • (1/3)3 = 1/3 • (1/3)3 = (1/3)4 = 1/81; 6) (11/2)–5 • (2/3)–4 = (3/2)–5 • (2/3)–4 = (2/3)5 • (2/3)–4 = (2/3)1 = 2/3; 7) (1/7)–6 : 77 • 2–1 = 76 : 77 • 1/2 = 7–1 • 1/2 = 1/7 • 1/2 = 1/14; 8) –(1,2)4 : (5/6)5 = –(12/10)4 • (6/5)5 = –(6/5)4 • (6/5)5 = –(6/5)9 = –1,29; 9) 3 • 0,75–1 : (1/2)4 = 3 • (3/4)–1 • 24 = 3 • 4/3 • 16 = 64; 10) 280 • 0,5–3 + 0,23 • 0,001–1 = 1 • (1/2)–3 + (2/10)3 • (1/1000)–1 = 23 + 8/1000 • 1000 = 8 + 8 = 16.