For more details go to www.abellna.com website.

A full mental math video may contain 2-8 examples. Only some examples are provided in a given video for demonstration purposes.

This technique is specific to certain types of fractions. Using the lowest common denominator is not needed.

1/2 + 1/8
1/7 + 1/15
1/6 + 1/13

Of course techniques for adding any type of fractions are also included in the Mental Math: Unleash The Power e-book. Some are provided in the video tutorials along with the local website.