Ответ:

  1. \(2^8=256\).
  2. \((-5)^2=25\).
  3. \((0{,}8)^2=0{,}64\).
  4. \(12^2=144\).
  5. \(\left(-\frac12\right)^4=\frac1{16}\).
  6. \(\left(\frac13\right)^3=\frac1{27}\).
  7. \(\left(2\frac35\right)^2=\left(\frac{13}{5}\right)^2=\frac{169}{25}\).
  8. \(\left(-1\frac13\right)^3=\left(-\frac43\right)^3=-\frac{64}{27}\).