MA05-01 Maths Watch
Calculating exactly with fractions
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In this lesson
In this video you'll learn about calculating exactly with fractions for GCSE Maths, with worked examples and the mistakes examiners report. By the end you'll be able to give an exact fraction answer to a calculation and recognise that 'exact', 'as a fraction' or 'in its simplest form' instructions forbid converting to a decimal or percentage.
What it covers
- 0:52 Calculating exactly with fractions: hook: the leaking third
- 2:14 The instruction words + checkable question
- 3:34 Worked example 1
- 4:55 Worked example 2, the jug
- 5:56 Exam technique
- 7:13 Your turn
- 8:33 What's next
Key words
For: AQA GCSE 8300, Edexcel GCSE 1MA1, Eduqas GCSE C300, OCR GCSE J560
On the specification
| Board | Spec | Statement |
|---|---|---|
| AQA GCSE 8300 | N8 | Calculate exactly with fractions |
| Edexcel GCSE 1MA1 | N8 | Calculate exactly with fractions and multiples of π |
| Eduqas GCSE C300 | FN8 | Calculate exactly with fractions and multiples of π |
| Eduqas GCSE C300 | HN8 | Calculate exactly with fractions, surds and multiples of π; simplify surd expressions involving squares (e.g. √12 = √(4 × 3) = √4 × √3 = 2√3) and rationalise denominators |
| OCR GCSE J560 | 3.03a | Use fractions in exact calculations without a calculator. |
For teachers
This GCSE Maths lesson teaches calculating exactly with fractions. By the end, students should be able to give an exact fraction answer to a calculation and recognise that 'exact', 'as a fraction' or 'in its simplest form' instructions forbid converting to a decimal or percentage. It works through two worked examples and the mistakes examiners report.