Rating is available when the video has been rented.
This feature is not available right now. Please try again later.
Published on Feb 15, 2011
John Zimmerman, http://www.algebratesthelper.com explains how to add or subtract fractions using the least common denominator, which is the least common multiple for the denominators of the fractions. Once the fractions are given a common denominator by multiplying the numerator and denominator of each fraction by the appropriate number, then the fractions can be added or subtracted by adding or subtracting the numerators, and leaving the denominator the same.