Rounding up/down to number

Rounding up/down to number

References

Reference NO 1

http://math.about.com/od/arithmetic/a/Rounding.htm

Reference NO 2

http://en.wikipedia.org/wiki/Rounding

Reference NO 3

http://cstl.syr.edu/fipse/decunit/roundec/roundec.htm

Reference NO 4

http://www.mathsisfun.com/rounding-numbers.html

Reference NO 5

http://www.wyzant.com/help/math/elementary_math/rounding_numbers_and_place_value/rounding_numbers

Reference NO 6

http://www.factmonster.com/math/numbers/rounding.html

Reference NO 7

http://uk.answers.yahoo.com/question/index?qid=20090319085752AAvrN3S

Reference NO 8

http://mathforum.org/library/drmath/view/58972.html