Arithmetic operations without tables

Eduardo Carriazo Paz, Luis Fernando Rodríguez Caro, "Arithmetic operations without tables"
English | 2012 | ASIN: B008HUP1U4 | EPUB | pages: 48 | 1.4 mb
As promised on its name, this book provides the tools to learn the basic arithmetical operations without the need to learn by heart any table. Instead it teaches how to use your imagination to achive this goal in a ludical and faster way. This volume, present the general principles under wich imaginativ maths works.