MA18-01 Maths Coming soon
Inequality Symbols and Number-Line Conventions
MA18-01
This lesson is coming soon.
In this lesson
Read and represent an inequality using <, <=, >, >= and the correct open or closed circle convention on a number line.
What it covers
- Reading and writing the four symbols <, <=, >, >=
- Open circle = value not included (strict inequality)
- Closed circle = value included (inclusive inequality)
- Drawing the arrow in the correct direction along the number line
- Translating a written inequality into a number-line diagram and reading a diagram back into a written inequality
- Representing a double inequality (e.g. a value between two bounds) with two circles
Key words
For: AQA GCSE 8300, Edexcel GCSE 1MA1, Eduqas GCSE C300, Edexcel IGCSE 4MA1, OCR GCSE J560, Cambridge IGCSE 0580
On the specification
| Board | Spec | Statement |
|---|---|---|
| AQA GCSE 8300 | A22 | Solve linear inequalities in one variable |
| Edexcel GCSE 1MA1 | A22 | Solve linear inequalities in one variable; represent the solution set on a number line |
| Eduqas GCSE C300 | FA18 | Solve linear inequalities in one variable; represent the solution set on a number line |
| Edexcel IGCSE 4MA1 | F2.8A | Understand and use the symbols >, <, ⩾ and ⩽ |
| Edexcel IGCSE 4MA1 | F2.8B | Understand and use the convention for open and closed intervals on a number line |
| OCR GCSE J560 | 6.04a | Understand and use the symbols <, ≤, > and ≥ |
| Cambridge IGCSE 0580 | C2.6 | Represent and interpret inequalities, including on a number line. |
For teachers
This GCSE Maths lesson teaches inequality symbols and number-line conventions. By the end, students should be able to read and represent an inequality using ＜, ≤, ＞, ≥ and the correct open or closed circle convention on a number line. It works through two worked examples and the mistakes examiners report.