Estimations

     Estimation is a good tool to know how to use everyday.  It is used in temperature. For example: the temperature is 61 degrees I would round down to 60.  The rule is if the number is smaller than 5 you round down, but if the number is 5 or greater than the number is rounded up.  According to the rules for estimation if the number, 61, is to be rounded then you look at, in this case, the ones place, which is a 1. Since the one is smaller than 5 you round down to 60.
    Another area where rounding occurs is when using rulers. When measuring a book shelf one must measure how tall the tallest book is for that shelf space.  If the book measures 9 1/2 inches, the shelf will need to be a little taller to have the book fit, 10 inches.
     This link is a fun way  to remember the estimation and another way people use estimation everyday. Theses kids were so cute and creative in how they decided to teach estimation.
http://www.youtube.com/watch?v=JntUGrqa1mo

Here is a blog to check out too.
http://homeschoolmath.blogspot.com/2010/09/estimation-methods.html