How to Calculate Quickly
Many useful procedures explained and taught: two-column addition, left-to-right subtraction, direct multiplication by numbers greater than 12, mental division of large numbers, more. Also numerous helpful short cuts. More than 8,000 problems, with solutions.
Math, calculation
http://uploading.com/files/WN5NYQNH/calculate_quickly_dimple.rar.html
Tuesday, August 4, 2009
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