How to Calculate Quickly: Full Course in Speed Arithmetic
Author(s): Henry Sticker
Publisher: Dover Publications
Date : 1995
Pages : 191
Format : DJVU
Language : English
ISBN-10 : 048620295X
ISBN-13 : 978-0486202952
Size : 2.37 MB
Description:
Many useful procedures explained and taught: two-column addition, left-to-right subtraction, direct multiplication by numbers greater than 12, mental division of large numbers, more. Also numerous helpful short cuts. More than 8,000 problems, with solutions.
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