Equivalent ratios lead to proportions. The video provides the definition of a proportion and provides examples of proportions. Using real-world examples, the resource shows how to solve for unknown quantities in proportions using the cross multiplying method.

Concepts

proportions, equivalent fractions, ratios, equivalent ratios, proportional reasoning, scale drawings

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Additional Tags

math

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Instructional Ideas

• Conduct a lesson on why cross multiplying is a valid way to solve proportions

Classroom Considerations

• The class should have a solid understanding of ratios
• It is helpful if individuals can solve one-step multiplication equations

• This video is hosted on YouTube

Pros

• Highlights proportions must have the same units
• Uses graphics to show the components involved in cross multiplying

Cons

• None

Common Core

SL.6.2 7.RP.A.2.a 7.G.A.1 RST.6-8.9 MP2 MP4