| Author | chris waring |
| Format | paperback |
| ISBN | 9781782432555 |
| Pages | 192 |
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...
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