If the fractions don't have a common denominator, make them have one. Learners first read and analyze a conversation of pupils trying to add 2/5 and 1/2. They compare the process of adding fractions to the process of adding quantities with different units.

Concepts

adding fractions, fractions unlike denominators, common denominators

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Additional Tags

math

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Instructional Ideas

• Have the class write their own scripts explaining the process of adding fractions with unlike denominators
  

Classroom Considerations

• Scholars must be able to add fractions with like denominators
• Knowledge of unit conversions is a prerequisite
  

Pros

• Includes both teacher reflection questions and student discussion questions
• Provides sample responses for all parts of the task
  

Cons

• None

Common Core

4.NF.B.3.a 5.NF.A.1 5.NF.A.2 MP1 MP2 MP3 MP6