Resumo

GOMEZ MULETT, ALFONSO  e  PEREZ SCHMALBACH, ADRIANA. THREE APPROACHES TO TEACH RATIONAL NUMBERS. Saber [online]. 2016, vol.28, n.4, pp.819-827. ISSN 1315-0162.

The interest of this study is focused on the analysis of the problems in teaching numeric systems, particularly in the  system  of  rational  numbers  as  is  taught  in  the  seventh  grade  of  elementary  education,  according  to  the approaches  part-whole,  operator  and  measurement.  This  study  has  as  theoretical  foundation  the  didactics  of mathematics,  using  a  mixed  methodology  that  combines  didactic  engineering,  text  analyses  and  focused interviews.  Seeking  for  an  approximation  to  understand  the  concept  of  rational  number  from  these  three approaches, the conceptions were explored about rational numbers shared by a group of teachers and the way they  teach  these  concepts  through  the  mediation  of  textbooks.  The  results  give  evidence  that  the  teaching  of rational numbers is influenced by the knowledge that the teacher has about them and the content provided by textbooks.

Palavras-chave : Rational number; all-part approach; operator approach; measure approach; textbooks.

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