Rapid math: Shortcuts to mastering rapid addition, rapid subtraction : quick methods for division, multiplication, fractions

by Archie Frederick Collins

a how to book of math

120 pages, Hardcover

First published May 4, 1998

About the author

Archie Frederick Collins, who generally went by A. Frederick Collins, was a prominent early American experimenter in wireless telephony and prolific author of books and articles covering a wide range of scientific and technical subjects.