Mathematics for IGCSE & O level - Estimation (Section 3 - No. 14)
How should you express your answer when you have rounded numbers in a calculation?
Give all the digits that the calculator shows.
Give the answer to the greatest degree of accuracy possible.
Always round your answer to the nearest whole number.
State the accuracy of your answer when you have rounded them.
Explication
Always state the degree of accuracy of your rounded answer.