approximation
An approximation - anything that is similar but not exactly equal to something else. It is an amount that is almost correct but not intended to be exact. When we round a number to a certain place value or a certain amount of significant figures, we are making an approximation.
making estimations
Quick practices for making estimations:
- Difference estimates in tens
- Sum estimates in tens
- Difference estimates in thousands
- Sum estimates in thousands
- Division estimates
- Product estimates in thousands
- Difference estimates in tens
- Sum estimates in tens
- Difference estimates in thousands
- Sum estimates in thousands
- Division estimates
- Product estimates in thousands
practice:
Significant figures (sig. fig.)
Significant figures and zero:
What's the point of significant figures?
Simplifying calculations to find approximate solutions - notes and practice on approximations