Ask-Bob.com

How to Calculate Quickly: Full Course in Speed Arithmetic

Many useful procedures explained and taught: 2-column addition, left-to-right subtraction, direct multiplication by numbers greater than 12, mental division of large numbers, more. Also numerous helpful shortcuts. More than 8,000 problems, with solutions. 1945 edition.

List Price: $ 5.95

Price: $ 2.16

More How To Do Fractions Products