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In this video I will explain the basic rules to adding fractions by explain the Type 4 addition of fraction where the new common denominator is the lowest common denominator or LCD. There are 2 methods of finding the LCD: 1) The LCD is a multiple of the largest denominator, 2) write each denominator as a product of its factors, or LCD=product of the most occurring factors.

Next video in this series can be seen at:
https://youtu.be/NegNIcrU1xk