Mr. D Math - Making Common Denominators and Adding Fractions

Contributor: Dennis Denoia. Lesson ID: 10549

Is the common denominator of your trouble with adding fractions the long way of finding common denominators? Instead of writing out multiples, watch and learn Mr. D's uncommon technique using primes!


Elementary, Middle School

learning style
Auditory, Visual
personality style
Grade Level
Intermediate (3-5), Middle School (6-8)
Lesson Type
Quick Query

Lesson Plan - Get It!

  • Are you tired of writing out multiple multiples to make common denominators?

Mr. D uses his uncommon technique to make it easy!

Watch Mr. D show you how to make a common denominator without having to list out all the multiples:

Continue on to the Got It? section for some helpful practice!

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