Mental multiplication
Subtitle: how to figure mentally, putting down the answer at once, without using any paper
By: by Charles Lipkin.
Edition: 3rd ed., rev. and enl. consisting of parts 1, 2, 3, and 4.
Publisher: The author
Published: 1939
Place of publication: New York
Language: eng
Number of pages: 28
Subjects: Mental arithmetic.; Multiplication.