Cancel that! Young mathematicians see how factoring and canceling can be very beneficial. The presenter works through examples of multiplying two rational expressions where the factors are simplified first. Factoring complex rational expressions and dividing out the common factors makes the multiplication much easier.

Concepts

rational expressions, simplify rational expressions, multiplication, algebraic expressions, algebraic fractions, factoring quadratics, properties of exponents

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Additional Tags

math

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Instructional Ideas

• Start by providing rational expressions that contain factored quadratics

Classroom Considerations

• Pupils need to understand what cancelling means
• Class members should know how to factor trinomials

• This video is hosted on YouTube

Pros

• The video provides two examples, one simple and one complex
• Instructor shows two different ways to simplify the first example

Cons

• None

Common Core

HSA-APR.D.7 MP6 MP7