# How do you write 0.52 times 10^-3 in standard form?

If by standard form you mean expanded form, it is $0.00052$. The negative exponent indicates that the decimal should be moved to the left three places.
If by standard form you mean scientific notation, it is $5.2 \times {10}^{- 4}$. The decimal moves one place to the right, which means the exponent is decreased by $1$.