# Significant Digits

### Learning and practicing the rules for significant figures!

## Significant Figures additional hellp

## Rules for Significant Figures

### Rules for Significant Figures

There are three rules on determining how many significant figures are in a number:

- Non-zero digits are always significant.
- Any zeros between two significant digits are significant.
- A final zero or trailing zeros in the decimal portion
__ONLY__ are significant.

There are three rules on determining how many significant figures are in a number:

- Non-zero digits are always significant.
- Any zeros between two significant digits are significant.
- A final zero or trailing zeros in the decimal portion
__ONLY__are significant.

### Practice for Significant Figures

How many significant figures does the following number have? 0.020430

5 significant figures

4 significant figures

How many significant figures does the following number have? 0.020430

5 significant figures

4 significant figures