The student´s ability of calculate in junior high schools

The arithmetical calculation, specially the writing calculation, it is an important complex of the mathematics course in seventh degree. In your methodological treatment the stage of application of the procedures is distinguished of each operation of fundamental calculation. This work has the main purpose to show some viewpoints of how the students learn mathematics using in functional contexts related with the daily life, to acquire progressively more complex knowledges as of the experiences and the previous knowledges those which can foment the active and creative paper of the students in the appropriation of the arithmetical knowledges