Front-End Estimation of Sums

Front-End Estimation: Learn

Front end estimation mostly produces a closer estimate of sums or differences than the answer produced by adding or subtracting rounded numbers.

How to Estimate a sum by Front-End Estimation:

  • Add the digits of the two highest place values
  • Insert zeros for the other place values


  • Add 4496 + 3745 by estimating them as 4400 + 3700 = 8100.
  • Add 4496 + 745 by estimating them as 4400 + 700 = 5100.

Add with Front-End Estimation: Practice

Estimate the sum using Front-End Estimation


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