And as a conclusion will be that there are 9 + 7 + 4 + 2 = 22 different possibilities to pay 17 with the required conditions. CONCLUSIONS. The authors have shown that in numerous tasks that appear in the different grades of the elementary school in the subject area of mathematics, the teacher needs to have clarity of how many and what solution possibilities that exist. This we must recognize them and teach them from in the early grades. Solve them by score, systematic testing, use testing strategies and error is the task of the teacher. In many situations of life, to make informed decisions, it is necessary to systematically cover all possibilities; said in other words, you must first specify an alternative, to then consider the possibilities through a complete differentiation of cases correctly, this is not only part of mathematical thought, but all correct thought. Combinatorics facilitates the development of thought, in addition, contributes to teach methods of thought which are typical of mathematics. BIBLIOGRAPHY.
To Daniel renciabia: elements of combinatorics. ISP Frank Pais. 1992 Brochure Batanaro M. C and others: Combinatorial reasoning. Secondary mathematics education. Editorial synthesis. S. A..
Madrid. Spain. 1994. Campistrous l. logic and logical learning procedures. Elaborated material. ICCP. 1993. Collective of authors. Pedagogy. ICCP. MINED. 1984 Davidov V and y. a. Markova: the development of thought in school age. In the evolutionary psychology and pedagogy in the USSR. Anthology. Publishing progress. Moscow. 1987 p. 173-193. Krafchenko B and others: selection of readings of children’s psychology and adolescent. Third part. Editorial Pueblo y Educacion. 1995 Textbooks of primary school. MINED. Linares Cesca, S and others: theory and practice in mathematics education. Alfar editorial. Spain. 1990 133p. Shoenfeld Alan H. Learnig to think of Mathemetcolly: Problem Solving, Macognition and sense making to Mathemetics teaching and Leamig. 1992 335p. Vygotsky l. S. thought and language. Revolutionary Edition. Editorial Pueblo y Educacion. 1966. Werner J. Conferencia methodology of the teaching of mathematics II. The first part. Publisher for education books. La Habana. Cuba.