Clear, concise compendium of about 150 time-saving math short-cuts features faster, easier ways to add, subtract, multiply, and divide. Each problem includes an explanation of the method, a step-by-step solution, the short-cut solution, and proof, as well as an explanation of why it works. No special math ability needed.
Reprint of the Sterling Publishing Company, New York, 1969 edition.
|Availability||Usually ships in 24 to 48 hours|
|Author/Editor||Gerard W. Kelly|
|Dimensions||5 3/8 x 8 1/2|