The resolution of problems as a focus of the area of mathematics, guides and gives meaning to mathematics education in the purpose that is pursued to develop citizens who act and think mathematically when solving problems with different contexts. In this sense, the grouping carried out in the session among all the boys and girls, promotes the sense of grouping, so with the sample of several objects found in the classroom they develop concrete, graphic, symbolic and formal actions; to reach the grouping of objects with the same characteristics._x000D_ In this way, the problem-centered approach guides mathematical activity in the classroom. In such a way that it allows the children to situate themselves in the different contexts to create, recreate, analyze, investigate, pose and solve problems, try different paths of resolution, analyze strategies and forms of representation, systematize ...