Which measurement is more precise, 0.4 g or 4.00 g ?

Which measurement is more precise, 4.0g or 4.00g?

Which of the given measurements is more precise?

which of the following measurements is most precise ?

Which of the following measurement is most precise ?

A : In a measurement, two readings obtained are 20.004 and 20.0004. The second measurement is more precise. R : Measurement having more decimal places is more precise.