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