GCSE Maths → Number
GCSE Number Revision
Number skills are the foundation of GCSE maths. Fractions, decimals, percentages, standard form, rounding, indices, and calculator accuracy appear across many exam questions.
Many students lose marks in algebra, ratio, geometry, and probability because their number skills are not secure enough. Strengthening these basics can improve confidence quickly.
GCSE number topic guides
Negative Numbers
Learn how to add, subtract, multiply, and divide negative numbers, including common GCSE sign mistakes.
Fractions
Adding, subtracting, multiplying, dividing, simplifying, and converting fractions.
Percentages
Converting between decimals, fractions, and percentages, and using percentages in exam questions.
Standard Form
Writing very large and very small numbers using powers of 10.
Indices and Powers
Understanding powers, square roots, cube roots, and index laws.
Why students struggle with GCSE number
- Weak times tables and arithmetic fluency.
- Confusion with fractions and mixed numbers.
- Difficulty converting between fractions, decimals, and percentages.
- Rounding too early in calculator questions.
- Not knowing when to estimate or check an answer.
Best order to revise GCSE number
- Times tables and basic arithmetic
- Negative numbers
- Fractions
- Decimals
- Percentages
- Rounding and estimation
- Standard form
- Indices and surds
Number support in Worthing
If your child struggles with fractions, decimals, percentages or accuracy, see our focused GCSE number support in Worthing guide.
Need help with GCSE number skills?
If your child keeps making small calculation mistakes, struggles with fractions, or loses confidence with basic number work, structured GCSE maths tutoring can help rebuild the foundations.