estimate
This is the term for using an approximation to get an answer which is close enough to the correct answer.
For example, we can estimate the cost of 5 compact discs which cost £7.99 each like this:
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5 × £8 = £40
This is the term for using an approximation to get an answer which is close enough to the correct answer.
For example, we can estimate the cost of 5 compact discs which cost £7.99 each like this: