I Used to Know That : Maths, Hardback


Brush up on your mental arithmetic, including percentages, averages and recurring decimals or work on your trigonometry skills, from Pythagoras Theorem to triangle areas and angles.

I Used To Know That: Maths is a fun and accessible way to re-visit all those useful tips and maths tricks that you have forgotten from your school days.


  • Format: Hardback
  • Pages: 192 pages, Ill
  • Publisher: Michael O'Mara Books Ltd
  • Publication Date:
  • ISBN: 9781843174745



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