Futuros profesores de primaria y secundaria clasifican problemas aditivos con números negativos.

In this research it is analyzed how, prospective teachers of Primary and Secondary school, classify additives problems with negative numbers according to the structures of the statements. Problems with structures of Combination, Change, Comparison and Two Changes have been used. The clinical interviews allow to analyze the classification criteria used by the students. It has been observed that these criteria can be complete (to look for the three numerical situations of the statement) or partial (to look for two numerical situations). It shows too how the contextual and linguistic aspects condition the classification. [ABSTRACT FROM AUTHOR]