If memories of learning algebra bring you out in a cold sweat & thoughts of quadratic equations cause you feelings of fear & dread I Used to Know That Maths can help A light-hearted & informative reminder of the things that we learnt in school but have since become relegated to the backs of our minds this book will help you to brush up on your mental arithmetic including percentages averages & recurring decimals or work on your trigonometry skills from Pythagoras' theorem to triangle areas & angles A practical guide to turn to when an answer is eluding you from helping a child with homework to calculating change or understanding statistics I Used to Know That Maths is a fun & accessible way to re-visit all those useful tips & maths tricks that you have forgotten from your school days