Ответ:

  1. \(5,2\cdot10^4=52000\).
  2. \(1,08\cdot10^{-2}=0,0108=\frac{108}{10000}=\frac{27}{2500}\).
  3. \(6\cdot10^5=600000\).
  4. \(4,15\cdot10^{-4}=0,000415=\frac{415}{1000000}=\frac{83}{200000}\).