The session entitled We play to solve combination problems 2, was developed in the area of mathematics taking into account the problem-solving approach whose competence solves quantity problems, from the necessary resources such as capabilities translates quantities into numerical expressions , communicates your understanding of numbers and operations, uses estimation and calculation strategies and procedures, argues statements about numerical relationships and operations; It has been possible to achieve the performance establishes relationships between data and one or more actions of adding, removing, moving forward, backward, putting together, separating, comparing and equalizing quantities, and transforming them into numerical expressions (model) of addition or subtraction with natural numbers of Up to two figures._x000D_ In the development of the session, motivational and challenging...