Mental calculation (English Wikipedia)

Analysis of information sources in references of the Wikipedia article "Mental calculation" in English language version.

refsWebsite

Global rank English rank

2recordholders.org

low place

low place

6^th place

6^th place

1worldmentalcalculation.com

low place

low place

archive.org

Cheprasov, Artem (September 3, 2009). On a New Method of Multiplication and Shortcuts. United States: CreateSpace Independent Publishing Platform. ISBN 9781448689330.

recordholders.org

"Mental Calculation World Cup - the World Championship for Mental Calculators". www.recordholders.org.
"Mental Calculation World Cup - the World Championship for Mental Calculators".

worldmentalcalculation.com

"Mental Calculations World Championship – World Mental Calculation".