If memories of learning algebra bring you out in a cold sweat and
thoughts of quadratic equations cause you feelings of fear and
dread, I Used to Know That: Maths can help. A light-hearted and
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 and recurring decimals or work on your
trigonometry skills, from Pythagoras' theorem to triangle areas and
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 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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