Mathematics for IGCSE & O level - Estimation (Section 1 - No. 23)
Which is an example of when it would be suitable to estimate?
Calculating exact amount of medicine to give.
Calculating the precise amount of fuel for a rocket launch
Estimating the cost of groceries
Working out the exact amount of land to buy.
Explication
Estimation is appropriate when an exact value is not critical, such as when estimating costs.