Addition

> Adding - Using Front End Estimation of Sums <

 

Adding-using Front End Estimation of Sum

When finding the sum of several numbers, one
way to estimate the sum is  called "front-end' 
estimation.

In front end estimation of sum you add only the
first digit of the numbers. The other digits are
replace by zeros.  Example:

Add 5524 and 3452 using front end estimation of sum.

Front end addition

Front-end estimation always gives a sum
less than the actual sum.

Normal addition