Can you multiply and divide by 2 or 10 without pencil and paper? Believe it or not, with just those two skills and a few simple tricks you can perform just about any everyday calculation in your head! That's just a small sample of the kind of number wizardry readers will learn to master.
Dimensions: 124 x 170
Author: Andrew Jeffrey
ISBN: 9781844838325
Format: Paperback
Pages: 144