The "flip the sign" rule that confuses everyone in IGCSE inequalities

Still confused by inequalities?
Not sure when to shade, when to use a dashed line, or why the inequality sign suddenly flips?

This quick IGCSE Maths revision lesson breaks down Linear Inequalities step-by-step in a way that actually makes sense.

In this video, you’ll learn:
• How to solve linear inequalities
• The BIG rule about flipping the sign
• Open circles vs closed circles on number lines
• How to graph inequalities
• Dashed vs solid boundary lines
• How shading regions works
• How to identify the accepted solution region on graphs

Think of inequalities like a security checkpoint.

Some values are allowed in.
Some are denied access.
And this lesson shows you exactly how to tell the difference.

This video is designed for:
• CAIE IGCSE Maths 0580 students
• GCSE Maths students
• Last-minute exam revision
• Students struggling with graph inequalities
• Teachers looking for engaging lesson starters or plenaries
• Tutors and homeschool learners

The explanations are visual, structured, and designed to reduce cognitive overload while helping students build real exam confidence.

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Why students use The Practice Book App:
• Structured IGCSE Maths revision
• Exam-style practice questions
• Guided topic progression
• Flashcards and summaries
• Progress tracking dashboards
• Calm, focused learning built for CAIE students

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Perfect for:
IGCSE Maths revision, CAIE 0580 inequalities, graph inequalities, GCSE algebra revision, maths lesson starters, classroom plenaries, solving inequalities, graphing inequalities, exam revision maths, and last-minute revision before exams.

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Видео The "flip the sign" rule that confuses everyone in IGCSE inequalities канала The Practice Book