Show the class two methods to solve proportions of fractions. The instructor shows that complex proportions can be solved by the normal method of cross-multiplying. It also shows another method where the complex fractions are simplified before solving the proportion from there.

Concepts

complex fractions, dividing fractions, fractions, multiplication fractions, proportions, cross multiply, cross products

Show More Show Less

Additional Tags

math

Show More Show Less

Instructional Ideas

• Lead a discussion on what it means when numbers cancel during fraction multiplication
• Let pupils share if they see another way they can solve these proportions

Classroom Considerations

• The class should be familiar with multiplying and dividing fractions

• This video is hosted on YouTube

Pros

• Compares the process to the process used in solving simple proportions
• Shows every step in the procedure

Cons

• None