How do you determine the number of significant figures if a number does not have a decimal place?

1 Answer
Jun 25, 2017

Answer:

It's normally determined by the first and last non-zero digit, but can be otherwise indicated...

Explanation:

By default, the number of significant figures is the number of digits in the run from the first non-zero digit to the last.

For example:

#200340000#

has #5# significant digits, namely "#20034#"

If you are given a number like #80000#, then by default it has just #1# significant digit unless you are told otherwise.

One convention that is sometimes used is to indicate the last significant digit with an overbar or underbar, e.g.

#80bar(0)00#

#80underline(0)00#

These examples have #3# significant figures, namely "#800#"