How to Calculate Quickly: Full Course in Speed Arithmetic
Henry Sticker
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. 1945 edition.
Kategorije:
Godina:
1955
Izdavač:
Dover Publications
Jezik:
english
Strane:
191
ISBN 10:
048620295X
ISBN 13:
9780486202952
Fajl:
DJVU, 2.37 MB
IPFS:
,
english, 1955