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| Arithmetic | 1 |
| Mathematics | 1 |
| Number Systems | 1 |
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| Mathematics Teaching | 1 |
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| Copley, G. N. | 1 |
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Copley, G. N. – Mathematics Teaching, 1972
The meaning of International Standard Book Numbers (ISBN) and the mathematics involved in the use of a check digit to catch errors in number transcription are discussed. (JM)
Descriptors: Arithmetic, Mathematics, Number Systems
