Watch Video on Adding Fractions – Math Help
Monday, February 1st, 2010
Access full lesson containing this video at: http://www.yourteacher.com/algebra1/addingfractions.php Students learn 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.
Duration : 0:2:55
Access full lesson containing this video at: http://www.yourteacher.com/algebra1/addingandsubtractingrationalexpressions.php Students learn that when adding rational expressions, the first step is to factor each of the denominators, if possible, then give each term a common denominator by multiplying the numerator and denominator of each term by the appropriate value. Next, add across the numerators and keep the denominators the same. Finally, factor the resulting numerator, if possible, to determine if the rational expression can be reduced.