Ответ:

  1. \((27\cdot3^{-4})^2=(3^3\cdot3^{-4})^2=3^{-2}=\frac1{9}\).
  2. \(16\cdot(2^{-3})^2=2^4\cdot2^{-6}=2^{-2}=\frac1{4}\).
  3. \((10^8)^2\cdot100^{-6}=10^{16}\cdot10^{-12}=10^4=10000\).
  4. \((10^{-10}\cdot100^6)^{-4}=(10^{-10}\cdot10^{12})^{-4}=10^{-8}\).
  5. \(\frac{6^{-4}\cdot6^{-9}}{6^{-12}}=6^{-4-9+12}=6^{-1}=\frac1{6}\).
  6. \(\frac{7^{-2}\cdot7^{-8}}{7^{-11}}=7^{-2-8+11}=7\).
  7. \(\frac{6^{-4}}{3^{-4}\cdot2^{-6}}=\frac{1/1296}{(1/81)(1/64)}=4\).
  8. \(3^{-2}\cdot5^{-3}=\frac1{9\cdot125}=\frac1{1125}\).

Ответ: \(\frac1{9}\); \(\frac1{4}\); 10000; \(10^{-8}\); \(\frac1{6}\); 7; 4; \(\frac1{1125}\).