Problem solving skills are the main points that the students realized the important role of mathematics in the daily life.In addition, through problem solving students will be trained and encouraged to develop formal reasoning independently and free from the control of the conservative paradigm thinking process. Routine procedures and issues involve static learning process will itself abandoned by the students because through problem solving, exercise effectively manage thoughts, efficient, and flexible over emphasized.Students may say formal thinking if they can understand the problems that purely abstract, able to make hypotheses, handle well the problems permutations and combinations can think flexibly and flexible regardless of the procedural rules that have been studied. The mathematical principle is no longer an intellectual force for the student but rather a structure that has been terkonstruk with neat and useful. In the end, all the teachers and education practitioners will be aware that the transformation process of reasoning is a primary identity that should be the center of attention in improving the quality of education is not to memorize the concept as much as possible.
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