What is the standard form of 0.000656

Dear student,

The standard form is the representation of the number such that decimal is written after a unit non-zero place.
Thus,
The standard form of $6.56\times {10}^{-4}$.
The exponent is -4 since the 6 at the unit place is present at the fourth place on the right of the decimal number.

Hope this helps,

Regards