# Number systems and integers notes

> CAPS-aligned study notes for Number systems and integers in Grade 9 Mathematics. Browse the sections below for explanations, worked examples and exam preparation.

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## Sections in Number systems and integers

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- [Number systems and classification of real numbers](https://www.hlayiso.com/grade-9/mathematics/notes/number-systems-and-integers/number-systems-and-classification-of-real-numbers) — Number Systems and Classification of Real Numbers Every number you use in mathematics belongs to a number system. Understanding how numbers are classified helps you work with them correctly and…
- [Operations with integers and prime factorisation](https://www.hlayiso.com/grade-9/mathematics/notes/number-systems-and-integers/operations-with-integers-and-prime-factorisation) — Operations with Integers and Prime Factorisation Integers are the set of positive and negative whole numbers, including zero. Performing calculations with integers requires a solid understanding of…

## Other Mathematics topics

- [Rational numbers](https://www.hlayiso.com/grade-9/mathematics/notes/rational-numbers)
- [Algebraic expressions](https://www.hlayiso.com/grade-9/mathematics/notes/algebraic-expressions)
- [Exponents](https://www.hlayiso.com/grade-9/mathematics/notes/exponents)
- [Equations](https://www.hlayiso.com/grade-9/mathematics/notes/equations)
- [Finance](https://www.hlayiso.com/grade-9/mathematics/notes/finance)
- [Ratio, rate and proportion](https://www.hlayiso.com/grade-9/mathematics/notes/ratio-rate-and-proportion)
- [Number patterns and graphs](https://www.hlayiso.com/grade-9/mathematics/notes/number-patterns-and-graphs)
- [Euclidean geometry](https://www.hlayiso.com/grade-9/mathematics/notes/euclidean-geometry)
- [Measurement, probability and statistics](https://www.hlayiso.com/grade-9/mathematics/notes/measurement-probability-and-statistics)

## Frequently asked questions

### What is covered in Number systems and integers for Grade 9 Mathematics?

The Number systems and integers section covers all key concepts from the Grade 9 Mathematics CAPS curriculum, including detailed explanations, worked examples, and exam preparation tips.

### Are the Number systems and integers notes free?

Yes. Each section has a free preview, and a free Hlayiso account lets you read the full notes.

### How do these notes help with exam preparation?

Our Number systems and integers notes are CAPS-aligned and include worked examples, common mistakes to avoid, and exam tips — everything you need to prepare for your Grade 9 Mathematics exams.

### Are there quizzes for Number systems and integers?

Yes. Hlayiso has quizzes for Number systems and integers in Grade 9 Mathematics. Test your understanding after reading the notes.

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