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Maths on the Back of an Envelope: Clever Ways to (Roughly) Calculate Anything [9780008324582]

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Does that statistic make sense?

How much will this round of drinks come to?

And what are the chances of winning the lottery? Twice?

Learn how to do complex maths with nothing but the back of an envelope, a pencil and some good old-fashioned brain power.

Doing mathematics without a calculator seems like an unnecessary feat in the twenty-first century. These clever little electronic devices have helped to take away the drudgery of arithmetic, and given all of us the power to perform in a few seconds what might previously have taken hours to work out.

But much of the time, we don't need the exact answer with its endless decimal points - we just need to know whether something is in the right ballpark.

Rob Eastaway's clever mathematical techniques do exactly that, as he takes an entertaining look at how to figure without a calculator.

From spotting misleading statistics in the news and bad deals, to estimating how long you'll be standing in that slowly crawling queue, this book is packed with amusing anecdotes and handy back-of-the-envelope calculations for every situation.

Most importantly, this book is a timely and welcome reminder that sometimes our own brain is the best tool we have to deal with numbers.


AUTHOR:

Rob Eastaway has been one of the UK's most successful popular maths authors of the last 15 years. His books include the bestselling Why Do Buses Come In Threes? and Maths for Mums and Dads. He is the Director of Maths Inspiration, a national programme of theatre-based lectureshows for 15-17 year olds that has reached over 150,000 teenagers since it began in 2004.

Rob regularly gives talks to all age groups in primary and secondary schools, appears on BBC Radio 4's current affairs/numbers programme More or Less, and works closely with National Numeracy, the national charity that campaigns for better adult numeracy.

In 2017, Rob received the Zeeman medal for excellence in communication of maths to the general public.

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SKU:
9780008324582
ISBN13:
9780008324582
Availability:
Delivery usually in 2-6 working days.
Author:
Rob Eastaway
Publisher:
HarperCollins Publishers Ltd
Publication:
19-Sep-2019
Format:
Hardback
Pages:
208
Chart Position:
1739
Weight:
276 Grams
  • 5
    A good little guide

    Posted by Thomas Greig on 29th Sep 2019

    I love this kind of thing, and wasn’t disappointed

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