The I Used to Know That: Maths Activity… by Smith, Daniel Paperback / softback
The I Used to Know That: Maths Activity Book: Stuff You Forgot from School. The I Used to Know That: Maths Activity Book is designed to take the fear out of maths. Guiding you through the all basics and beyond, this book is full of clear and simple explanations with enjoyable exercises to help ‘square’ your knowledge.