Rounding and Estimating
Subjects / Maths / Number
Rounding numbers and quantities can be done in different ways. Firstly, to the nearest whole number, which is covered in Chapter One. Secondly, to decimal place value, which is considered in Chapter Two. Finally, numbers can be rounded to significant figures, which we'll look at in Chapter Three. All of these ways rely on the '5 rule' for rounding up or leaving numbers as they are. On the non calculator paper, you will be asked to estimate an answer. This is explained in Chapter Four and has very specific rules attached to it. In the Higher level paper, we are required to find upper and lower bounds, or simply to put a number back to its 'un-rounded' state. Chapter Five details how we do this. Always remember to look carefully for the level of accuracy the question is asking for.
| Author: | Mark Cheesman | Publisher: | GCSEPod® |
| Narrator: | Gareth Williams | ISBN: | 978-1-84906-354-8 |
| Video ISBN: | 978-1-84906-854-3 |
Chapters
- Rounding to Powers of 10
- Rounding to Decimal Places
- Rounding to Significant Figures
- Estimating
- Upper and Lower Bounds - Higher Level only
- Test Yourself on Rounding and Estimating
Exam Board Relevance
- Edxcel
- AQA
- CEA
- IGCSE (EdExcel)
- OCR
- SQA
- WJEC
- IGCSE (CiE)
Includes original GCSEPod image art
Curriculum and Exam Board Information
Key Issues
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