Ответ:

  1. \(\sqrt{0.25}=0.5\).
  2. \(\sqrt[5]{32}=2\).
  3. \(\sqrt[3]{-3\frac{3}{8}}=\sqrt[3]{-\frac{27}{8}}=-\frac{3}{2}\).
  4. \(0.7^4\sqrt{81}=0.2401\cdot9=2.1609\).
  5. \(\sqrt[4]{\frac{16}{81}}+\sqrt[3]{-\frac18}=\frac23-\frac12=\frac16\).
  6. \((2\sqrt[3]{4})^3=2^3\cdot4=32\).
  7. \(\frac{6}{(2\sqrt3)^2}=\frac6{12}=\frac12\).
  8. \(-3\sqrt[5]{(-7)^5}=-3\cdot(-7)=21\).
  9. \(\sqrt[4]{16}\cdot\sqrt[3]{-125}=2\cdot(-5)=-10\).
  10. \(\sqrt[4]{1}\cdot\sqrt[3]{0.008}=1\cdot0.2=0.2\).
  11. \(\sqrt[4]{2}:\sqrt[4]{8}=\sqrt[4]{\frac14}=\frac1{\sqrt2}=\frac{\sqrt2}{2}\).
  12. \(\sqrt[3]{54}\cdot\sqrt[3]{32}=\sqrt[3]{1728}=12\).
  13. \(\frac{\sqrt[3]{189}}{3\sqrt[3]{7}}=\frac{\sqrt[3]{27\cdot7}}{3\sqrt[3]{7}}=1\).
  14. \(\left(2^{12/5}\cdot2^{8/5}\right)^{1/2}=\left(2^4\right)^{1/2}=4\).

Ответ: 1) 0,5; 2) 2; 3) −3/2; 4) 2,1609; 5) 1/6; 6) 32; 7) 1/2; 8) 21; 9) −10; 10) 0,2; 11) √2/2; 12) 12; 13) 1; 14) 4.