# Grade 9 Mathematics Flashcards

> Spaced-repetition flashcards covering Grade 9 Mathematics topics — definitions, formulas, and exam tips.

- Page: https://www.hlayiso.com/grade-9/mathematics/flashcards
- Flashcard decks: 20
- Topics: 10

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## Flashcards by topic

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### Number systems and integers

- Number systems and classification of real numbers — 15 cards
- Operations with integers and prime factorisation — 15 cards

### Rational numbers

- Fractions, decimals and percentages — 15 cards
- Operations with rational numbers — 15 cards

### Algebraic expressions

- Factorising and algebraic fractions — 15 cards
- Simplifying and expanding algebraic expressions — 15 cards

### Exponents

- Laws of exponents — 15 cards
- Simplifying exponential expressions — 15 cards

### Equations

- Linear equations and inequalities — 15 cards
- Simultaneous equations and word problems — 15 cards

### Finance

- Hire purchase and exchange rates — 15 cards
- Simple and compound interest — 15 cards

### Ratio, rate and proportion

- Direct and inverse proportion — 15 cards
- Ratio and rate — 15 cards

### Number patterns and graphs

- Linear graphs and their equations — 15 cards
- Number patterns and sequences — 15 cards

### Euclidean geometry

- Lines, angles and angle relationships — 15 cards
- Properties of triangles and congruence — 15 cards

### Measurement, probability and statistics

- Area, perimeter, surface area and volume — 15 cards
- Probability and statistics — 15 cards

## Frequently asked questions

### What are Hlayiso flashcards?

Short, spaced-repetition cards covering definitions, formulas, and key facts for Grade 9 Mathematics.

### Are the cards pre-made or do I make them?

Both. Hlayiso ships curated decks per Grade 9 Mathematics topic, and you can create your own decks to share or revise privately.

### How does spaced repetition work?

Cards you get right are shown less often; cards you struggle with come back sooner. Over a few sessions you end up remembering the hard stuff.

### Can I study offline?

The Hlayiso app keeps your active decks on your device, so you can review without a connection.

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