Literaturnachweis - Detailanzeige
Autor/in | Escultura, Eddie |
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Titel | A Number Trick--Explained with Algebra. |
Quelle | In: Mathematics Teacher, 76 (1983) 1, S.20-21 |
Sprache | englisch |
Dokumenttyp | gedruckt; Zeitschriftenaufsatz |
Schlagwörter | Leitfaden; Unterricht; Lehrer; Algebra; Algorithms; Instructional Materials; Mathematical Concepts; Mathematical Enrichment; Mathematics Instruction; Numbers; Proof (Mathematics); Secondary Education; Secondary School Mathematics |
Abstract | The trick focuses on a theorem that the sum of the digits of the difference between any natural number and the sum of its digits is divisible by nine. Two conditions of using the trick are noted. The reason that the theorem works is established through a proof. (MP) |
Erfasst von | ERIC (Education Resources Information Center), Washington, DC |
Update | 2004/1/01 |