Вправи 301 - 400 » 318

318. Обчисліть: 1) 2–4 • 2–2 = 2–4+(–2) = 2–6 = 1/2^6 = 1/64; 2) 24 • 2–2 = 24+(–2) = 22 = 4; 3) 2–4 • 22 = 2–4+2 = 2–2 = 1/2^2 = 1/4; 4) 24 • 22 = 24+2 = 26; 5) 28 • 2–3 = 28+(–3) = 25 = 32; 6) 2–7 • 23 = 2–7+3 = 2–4 = 1/2^4 = 1/16; 7) 25 • 2–11 • 20 = 25+(–11) • 1 = 2–6 = 1/2^6 = 1/64; 8) 2 • 213 • 2–16 = 21+13+(–16) = 2–2 = 1/2^2 = 1/4; 9) 2 • 2–5 • 26 • 20 = 21+(–5)+6 • 1 = 22 = 4.