It enables Professional Suficiencia's present Trabajo evidencing Regla's of concern development ithin the everyday learning of mathematics, since the student should manage to solve problems of context applying strategies of calculation and estimate. For it the student should recognize the data_x000D_ that come into question in the problem, using strategies for your resolution and telling apart the simple interest and compound. That way also you should demonstrate self-confidence when using strategies, procedures and appreciating the importance of the significance of the rule of concern. The student with this theme will evidence his capacities of communicating his understanding on numbers and the and operations use strategies and procedures of estimate and calculation