Many useful procedures explained and taught: 2-column addition, left-to-right subtraction, mental division of large numbers, more. Also numerous helpful shortcuts. More than 8, 000 problems, with solutions. 1945 edition.
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ISBN | 9780486202952 |
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Sprache | eng |
Cover | Kartonierter Einband (Kt) |
Verlag | Dover Publications Inc. |
Jahr | 20000201 |
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