You know how to find absolute values and you know how to solve inequalities — but what happens when these two concepts are in the same problem? A YouTube video first reviews absolute values and moves on to solving absolute value inequalities. All inequalities contain linear expressions in the absolute value bars.

Concepts

absolute value inequalities, solution set, solving inequalities

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Additional Tags

math

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Instructional Ideas

• If using in classroom, provide the class with cloze notes that can be filled in while watching the video
• Pause the video to allow viewers to solve the given inequalities before watching the solution

Classroom Considerations

• The video only covers how to solve absolute value inequalities; the narrator indicates that a separate video covers graphing solutions to such inequalities

• This video is hosted on YouTube

Pros

• Examples begin with simpler equations and progress to more difficult equations
• Samples include both "and" and "or" cases

Cons

• F-IF.7b includes graphing absolute value functions (in the coordinate plane), but the video is about solving and graphing absolute value equations (on a number line)
• Treatment of subject matter is superficial and procedural with little conceptual understanding, such as flipping the inequality and changing the sign without explaining why this yields a solution

Common Core

HSF-IF.C.7.a HSF-IF.C.7.b