000			01219nam a2200181 4500
008			231205b ||||| |||| 00| 0 eng d
020			_a9780008389031 (pbk)
082			_a510 _bEAS
100			_aEastaway, Robert _910383
245			_aMaths on the back of an envelope : _bclever ways to (roughly) calculate anything
260			_aLondon _bHarperCollins _c2019
300			_avi, 200p.
500			_ahttps://harpercollins.co.in/product/maths-on-the-back-of-an-envelope/
520			_a"Rob Eastaway has written or co-written twelve books, including the bestselling Why Do Buses Come in Threes? and Maths for Mums and Dads as well as What Is a Googly?, the acclaimed beginner’s guide to cricket. He is the Director of Maths Inspiration, a national programme of theatre-based lecture shows 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"
650			_aMathematics _9435
650			_aArithmetic _910384
942			_cBK
999			_c9878 _d9878