How to Calculate Quickly : Full Course in Speed Arithmetic

HENRY STICKER
How to Calculate Quickly : Full Course in Speed Arithmetic
How to Calculate Quickly : Full Course in Speed Arithmetic

How to Calculate Quickly : Full Course in Speed Arithmetic
ISBN: 9780486202952
Publication Date: 1 June 1955

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.