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• Number theory vs. Hungarian highschool textbooks: √2 is irrational

  139-152

  Petra Csányi

  Kata Fábián

  Csaba Szabó

  Zsanett Szabó

  Éva Vásárhelyi

  Views:

  26

  According to the Hungarian National Curriculum the proof of the irrationality of √2 is considered in grade 10. We analyze the standard proofs from the textbooks and give some mathematical arguments that those reasonings are neither appropriate nor sufficient. We suggest that the proof should involve the fundamental theorem of arithmetic.

• Number theory vs. Hungarian high school textbooks: the fundamental theorem of arithmetic

  209-223

  Petra Csányi

  Kata Fábián

  Csaba Szabó

  Zsanett Szabó

  Views:

  16

  We investigate how Hungarian highschool textbooks handle basic notions and terms of number theory. We concentrate on the presentation of the fundamental theorem of arithmetic, the least common multiple and greatest common divisor. Eight families of textbooks is analyzed. We made interviews with the authors of four of them. We conclude that a slightly more precise introduction would not be harmful for pupils and could bring basic number theory closer to them.