MA04-04 Maths Watch
Adding and subtracting fractions and mixed numbers
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In this lesson
In this video you'll learn about adding and subtracting fractions and mixed numbers for GCSE Maths, with worked examples and the mistakes examiners report. By the end you'll be able to add and subtract fractions and mixed numbers, including negatives, by first rewriting them over a common denominator.
What it covers
- 1:20 Why, the rule, and a baby step
- 3:18 Worked example 1: 3/4 + 5/6
- 5:26 Examiner warning + mixed-number
Key words
For: Edexcel IGCSE 4MA1, AQA GCSE 8300, Edexcel GCSE 1MA1, Eduqas GCSE C300, Cambridge IGCSE 0580, OCR GCSE J560
On the specification
| Board | Spec | Statement |
|---|---|---|
| Edexcel IGCSE 4MA1 | F1.2F | Use common denominators to add and subtract fractions and mixed numbers |
| Edexcel IGCSE 4MA1 | F1.1E | Use the four rules of addition, subtraction, multiplication and division |
| AQA GCSE 8300 | N2 | Apply the four operations, including formal written methods, to integers, decimals and simple fractions (proper and improper), and mixed numbers – all both positive and negative |
| Edexcel GCSE 1MA1 | N2 | Apply the four operations, including formal written methods, to integers, decimals and simple fractions (proper and improper), and mixed numbers – all both positive and negative; understand and use place value (e.g. when working with very large or very small numbers, and when calculating with decimals) |
| Eduqas GCSE C300 | FN2 | Apply the four operations, including formal written methods, to integers, decimals and simple fractions (proper and improper), and mixed numbers – all both positive and negative; understand and use place value (e.g. when working with very large or very small numbers, and when calculating with decimals) |
| Eduqas GCSE C300 | HN2 | Apply the four operations, including formal written methods, to integers, decimals and simple fractions (proper and improper), and mixed numbers – all both positive and negative; understand and use place value (e.g. when working with very large or very small numbers, and when calculating with decimals) |
| Cambridge IGCSE 0580 | C1.6 | Use the four operations for calculations with integers, fractions and decimals, including correct ordering of operations and use of brackets. |
| Cambridge IGCSE 0580 | E1.6 | Use the four operations for calculations with integers, fractions and decimals, including correct ordering of operations and use of brackets. |
| OCR GCSE J560 | 1.01a | Use non-calculator methods to calculate the sum, difference, product and quotient of positive and negative whole numbers. |
| OCR GCSE J560 | 2.01b | Add, subtract, multiply and divide simple fractions (proper and improper), including mixed numbers and negative fractions. |
| OCR GCSE J560 | 2.02b | Add, subtract and multiply decimals including negative decimals, without a calculator. |
| OCR GCSE J560 | 2.02c | Divide a decimal by a whole number, including negative decimals, without a calculator. |
For teachers
This GCSE Maths lesson teaches adding and subtracting fractions and mixed numbers. By the end, students should be able to add and subtract fractions and mixed numbers, including negatives, by first rewriting them over a common denominator. It works through two worked examples and the mistakes examiners report.