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.
Code:
http://rapidshare.com/files/258544730/calculate_quickly_dimple.rar
ليست هناك تعليقات:
إرسال تعليق