Answers by visitors named: HAPPY FACE :)

P.S. or should there be no comma? Please Help!!

jake

front end estimation: 436+517=400+500=900 rounding: 236+710= 200+700=900 front end estimation: * Add the digits of the two highest place values * Insert zeros for the other place values * Example 1: 4496 + 3745 is estimated to be 8100 by front end estimation (i.e. 4400 + 3700). * Example 2: 4496 + 745 is estimated to be 5100 by front end estimation (i.e. 4400 + 700). rounding: * Rounding makes numbers that are easier to work with in your head. * Rounded numbers are only approximate. * An exact answer generally can not be obtained using rounded numbers. * Use rounding to get a answer that is close but that does not have to be exact. How to round numbers * Make the numbers that end in 1 through 4 into the next lower number that ends in 0. For example 74 rounded to the nearest ten would be 70. * Numbers that end in a digit of 5 or more should be rounded up to the next even ten. The number 88 rounded to the nearest ten would be 90.