Main Notes · Grade 10 · 22 pages · PDF
Order of Operations & Rounding NumbersMain Notes
The full notes: one idea per page, a worked example beside every rule.
A complete 21-page IGCSE guide to order of operations and rounding. It starts with BI(O)DMAS, including nested brackets, indices, fraction bars and calculator tips. It then teaches rounding to decimal places, significant figures and the nearest 10, 100 or 1000, as well as truncation and estimating calculations. The final section covers upper and lower bounds, including bounds in area and speed calculations. Every method comes with step-by-step worked examples and common mistakes to avoid. It ends with a summary, a keyword guide and exam tips.
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The full notes: one idea per page, a worked example beside every rule.
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Cheatsheet
The whole topic on a page or two, for the night before.
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