Front end estimation is a quick method to find an estimate of sums and differences, however it is generally not more accurate than the answer produced by adding or subtracting rounded numbers.
Take for example a pair of pants and a shirt that are $24.99 and $16.99, respectively. The correct total of these items would be $41.98. Using the method of adding rounded numbers would yield $42 - which is only two cents from the correct total. Front end estimation would yield $40 - which is $1.98 short of the correct total.
The use of front end estimation is why stores sell things for $24.99 and $16.99, rather than $25 and $17. It is an open attempt to make the consumer think that they are paying for something at a lower price than they actually are.
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Front end estimation- An estimation method in which the front digits are added or subtracted
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A method of making a rough measurement is: Estimation Answered by :PopTy13
Square roots are computed using the Babylonian method, calculators, Newton's method, or the Rough estimation method. * * * * * Or the Newton-Raphson method.
when is the estimation of product is a useful tool