Instructional Video

Adding and Subtracting Fractions

Curated and Reviewed by Lesson Planet

Why can't mathematicians add just like they multiply fractions? The resource provides a counterexample to show that the same rules for multiplying fractions do not work for addition. Using the counterexample, learners see the proper way to add fractions with common denominators. 

1 Collection 25 Views 16 Downloads
CCSS: Adaptable
Additional Tags
Instructional Ideas
  • To start, use fraction models to demonstrate the addition of fractions
Classroom Considerations
  • Pupils should understand fractions as division problems
  • Assumes the class knows how to simplify fractions
  • This video is hosted on YouTube
Pros
  • Uses a fraction model to demonstrate why the improper way of addition does not work
  • Includes mathematical terms to describe like fractions
Cons
  • None