Mathematics for IGCSE & O level - Using A Calculator (Section 1 - No. 41)
If a problem is given to you in a real-life situation and is not exact, think about
What degree of accuracy is sensible.
How to write in decimal places.
How to write in standard form.
The number of significant figures.
Εξήγηση
Considering sensible accuracy helps to ensure the answer is relevant.