New from Fun With Figures...

How To Really Calculate
In Your Head


Free preview of the only complete guide to mental arithmetic for beginners and improvers.  

See the full details at Amazon:

USA:
http://www.amazon.com/How-To-Really-Calculate-In-Your-Head

UK:
http://www.amazon.co.uk/How-Really-Calculate-Your-Head-ebook/dp/B00DHLK5VI/

Australia:
http://www.amazon.com.au/How-Really-Calculate-Your-Head-ebook/dp/B00DHLK5VI/