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Вижте книги с подобно съдържание и в следните категории: Книги на английски език
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.
Книги, подобни на "How to Calculate Quickly" |