How do you reduce a number to a certain number of significant digits?
Follow a step by step process.
Step 1. Underline the number of significant figures you need
Example. If you need to reduce
Step 2. Look at the next number (not underlined)
Step 3. Round up or down depending on the following rule
- If the next number is 5 or more, round up
- If the next number is 4 or less, round down
- Change the remaining numbers to zero