Ответ:

  1. \(\sqrt[4]{324}:\sqrt[4]{4}=\sqrt[4]{81}=3\).
  2. \(\sqrt[3]{128}:\sqrt[3]{2000}=\sqrt[3]{\frac{128}{2000}}=\sqrt[3]{\frac8{125}}=\frac25\).
  3. \(\frac{\sqrt[3]{16}}{\sqrt[3]{2}}=\sqrt[3]{8}=2\).
  4. \(\frac{\sqrt[5]{256}}{\sqrt[5]{8}}=\sqrt[5]{32}=2\).
  5. \(\frac{\sqrt{25}-\sqrt{45}}{\sqrt5}=\frac{5-3\sqrt5}{\sqrt5}=\sqrt5-3\).
  6. \(\frac{\sqrt[3]{625}-\sqrt[3]{5}}{\sqrt[3]{5}}=\sqrt[3]{125}-1=5-1=4\).

Ответ: 1) \(3\); 2) \(\frac25\); 3) \(2\); 4) \(2\); 5) \(\sqrt5-3\); 6) \(4\).