Polish Hand Magic is also an interesting trick to do multiplications: http://www.scientificamerican.com/article.cfm?id=parents-corner-polish-han http://www.sci

Polish Hand Magic is also an interesting trick to do multiplications: http://www.scientificamerican.com/article.cfm?id=parents-corner-polish-han http://www.scientificamerican.com/article.cfm?id=parents-cor... A comic illustrating the trick: http://www.smbc-comics.com/index.php?db=comics&id=1914#comic http://www.smbc-comics.com/index.php?db=comics&id=1914#c...