Approximation & Error
Rounding, significant figures, decimal places, percentage error, and upper and lower bounds in measurements.
Start practising →Sample questions
- Easy Percentage error No Calculator [3]
- Easy Rounding to decimal places No Calculator [2]
- Easy Significant figures No Calculator [3]
About this topic
These are original, exam-style questions written to match the IB Mathematics syllabus for Applications & Interpretation SL. Every question comes with a full step-by-step worked solution showing the method, with mark allocations matching real IB marking schemes. Questions are labelled Paper 1 (no calculator) or Paper 2 (calculator allowed) so you practise under realistic exam conditions.
How to practise
- Open the question bank using the button above.
- Attempt the question, writing out your working.
- Reveal the full worked solution and compare your method step by step.
- Use the difficulty and calculator filters to focus on what you need most.