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    I Used to Know That: Maths

    Posted By: Free butterfly
    I Used to Know That: Maths

    I Used to Know That: Maths by Chris Waring
    English | May 15, 2012 | ISBN: N/A | ASIN: B0083JC9JA | 192 pages | AZW3 | 2.00 Mb

    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.

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