Clustering

What Does Estimate by Clustering Mean in Math?

Estimating by clustering refers to a strategy that can help you quickly estimate an answer. To estimate by clustering, find a number your values are all close to. Then solve the problem using your estimated value instead of each separate number.

Example

o        Suppose you need to add 77.4, 82, 79.5 and 81. These four numbers are all close to 80, so multiply 80 times 4, which equals 320.

Purpose

o        Estimating by clustering provides a quick way to check a calculation or make a guess when you don't need an exact answer.

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Considerations

o        Estimating by clustering works best when your numbers are all similar in value. If your numbers differ widely in value and don't have an obvious cluster, use a different estimation strategy, such as rounding.