http://www.articleheaven.net en-us editorial@articlealley.com Maybe you aren't satisfied with your computational skills. If you want to improve them, check the quality of your simple mental computations first. I keep in view simple mental addition and subtraction within the limits of 20, simple mental multiplication... http://www.articleheaven.net/the-first-step-towards-good-computational-skills-1029523.html 11th August 2009