Вправи 301 - 400 » 332-333

332. Спростіть вираз: 1) a–25 : a–12 • a–12 = a–25–(–12)+(–12) = a–25; 2) a40 • a–30 : a10 = a40+(–30)–10 = a0 = 1; 3) a–32 : a2 : a–14 = a–32–2–(–14) = a–20; 4) a0 • a : a–9 • a11 = a0+1–(–9)+11 = a21; 5) a : a–7 • a–1 : a5 = a1–(–7)+(–1)–5 = a2; 6) a • a–5 : a–4 : a8 = a1+(–5)–(–4)–8 = a–8; 7) m6 : m–13 • m–7 = m6–(–13)+(–7) = m12; 8) m–9 : m2 • m–2 : m9 = m–9–2+(–2)–9 = m–22. 333. Яка з рівностей є правильною: 1) (4–3)5 = 4–8 – ні; 3) (4–2)–5 = 47 – ні; 2) (4–3)5 = 4–15 – так; 4) (4–2)–5 = 410 – так.