Link NewDesignWorld.comhttp://www.newdesignworld.com Liftoff for the latest information at NewDesignWorld.com http://www.newdesignworld.com/detail-learning_mathematics_with_the_abacus-2673.html Learning Mathematics with the Abacus 2006-11-20 18:12:35 Learn how to use an abacus to solve mathematical problems as a foundation to develop mental arithmetic skills.