Cut a piece of molding by subtracting polynomials. Pupils watch a video as the presenter works through an example of a word problem involving the subtraction of polynomials. The problem involves finding the remaining length of a piece of molding after a piece has been cut off. Polynomials represent lengths that require a polynomial subtraction problem to find the remaining length.

Concepts

polynomials, subtraction polynomials, word problems, length

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Additional Tags

math

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Instructional Ideas

• Provide several similar problems for practice
• Ask class members to create word problems that involve adding and subtracting of polynomials

Classroom Considerations

• Requires knowledge of subtracting polynomials

• This video is hosted on YouTube

Pros

• Uses colors to highlight like terms
• Provides a diagram to model the situation in the word problem

Cons

• None

Common Core

SL.9-10.2 MP1 MP6 MP7 HSA-APR.A.1