What you'll learn
Working confidently with all types of number.
Key skills
- Fractions, decimals and percentages and converting between them.
- Percentage change, increase/decrease and reverse percentages.
- Indices (laws of powers) and standard form for very large/small numbers.
- Prime factors, HCF and LCM; simplifying surds.
- Ratio and sharing in a given ratio.
Exam tips
- Show every step in multi-mark calculations.
- Check whether an answer should be a fraction, decimal or percentage.
Common mistakes
- Forgetting the order of operations (BIDMAS).
- Adding indices instead of multiplying (or vice versa).