Do not use the easiest but the first. The video shows a method to find a common denominator by finding the least common denominator to add fractions. By listing the multiples of the denominators, learners easily identify the least common multiple by finding the first common multiple.

Concepts

common denominators, least common denominator, adding fractions, subtracting fractions, common multiples, least common multiple

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Additional Tags

math

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Instructional Ideas

• Review common multiples with the class

Classroom Considerations

• Scholars need to know how to add and subtract fractions with like denominators
• Expects learners know how to find equivalent fractions

• This video is hosted on YouTube

Pros

• Uses a table to organize multiple making it easier to see
• Colors show relationships between denominators and multiples to clearly identify them
  

Cons

• None

Common Core

SL.5.2 SL.6.2 5.NF.A.1 6.NS.B.4 MP6