Write each number in standard notation
Going from scientific notation to standard notation is pretty easy. You simply shift the decimal by the exponent on the 10. For example 4.2 x 10^3 = 4200 (decimal shifted 3 units), 5.2 x 10^-3 = .0052 (decimal shifted -3 units). Remember positive is to the right and negative is to the left just like on a number line.