Mathematics for IGCSE & O level - Using A Calculator (Section 1 - No. 5)
What should you do if the problem is not set in context or you are not sure of the accuracy?
Give the answers to two decimal places if it is not exact
Give the answers to one significant figure.
Give the answers to two significant figures.
It does not matter.
Explanation
You should give the answers to three significant figures if it is not exact
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