Instant math, based on the Trachtenberg speed system of basic mathematics.
Edition: [1st ed.]
Publisher: Doubleday
Published: 1962
Place of publication: Garden City, N.Y
Language: eng
Number of pages: 60
Subjects: Mental arithmetic.; Mental arithmetic.; Multiplication.; Addition.
Other titles: Trachtenberg speed system.
Description: A system for doing multiplication and addition quickly through the use of mental "tricks."