000			02373cam a2200337Ii 4500
001			ocm1176517820
005			20250203144019.0
008			200726r20212019enk e 000 0 eng
020			_a0008444498 _q(paperback)
020			_a9780008444495 _q(paperback)
035			_a(OCoLC)1176517820
035			_a(OCoLC)on1176517820
040			_aYDX _beng _erda _cYDX _dUKMGB _dOCLCO _dOCLCF _dOCO _dOCLCO _dOCL _dMiTN
050		4	_aQA93 _b.E278 2021
082	0	4	_a510 _223
092			_a510 _bE
100	1		_aEastaway, Robert,
245	1	0	_aMaths on the back of an envelope : _bclever ways to (roughly) calculate anything / _cRob Eastaway.
264		1	_aLondon : _bHaperCollinsPublishers, _c2021.
264		4	_c©2021.
300			_avi, 201 pages ; _c21 cm.
336			_atext _btxt _2rdacontent.
337			_aunmediated _bn _2rdamedia.
338			_avolume _bnc _2rdacarrier.
500			_a"First published by HarperCollinsPublishers 2019."
520			_aDoes 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.
650		0	_aArithmetic _vPopular works.
650		0	_aMathematics _vPopular works. _94226
655		7	_aAnecdotes. _2lcgft.
655		7	_aInstructional and educational works. _2lcgft. _928
999			_c522889 _d522889