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课标对“运算能力”这样表述:“运算能力主要是指能够根据法则和运算律正确地进行运算的能力。培养运算能力有助于学生理解运算的算理,寻求合理简洁的运算途径解决问题。”作为数学课程中应当注重的核心能力,现实的课堂教学与练习应如何有效体现过程,提升学生“运算能力”呢?1.突出“算理”的分析解构与迁移。在以往的计算教学中,教师将主要精力放在让学生经历“算理”的形成过程,并辅之以相应的练习,实现“操作技能”的逐步形成。这样的设计有利于让学生明晰运算的操作程序,使学生在确定性的运算过程中实现技能的智慧提升。但“算理”的应用不能仅停留于“会算”的阶段,按照算法规则进行逻辑推理而获得正确结果仅仅是计算的一个方面,更重要的,在计
Courses on the “computing power” statement: “computing power mainly refers to the ability to operate correctly according to the law and computing law .Calculate computing power helps students understand arithmetic computing, to seek reasonable and concise operation Ways to solve the problem. ”As the core competence that should be emphasized in the mathematics curriculum, how should the actual classroom teaching and practice effectively reflect the process and enhance the students “ computing power ”? 1. Highlight the analysis and deconstruction of“ arithmetic ” With migration. In the previous teaching of calculation, teachers mainly focused on letting students experience the formation of “arithmetic ”, supplemented by the corresponding exercises to achieve the gradual formation of “operating skills ”. Such a design is conducive to students’ clear operational procedures, enabling students to achieve the wisdom of skills in the process of deterministic computing. However, the application of “arithmetic ” can not only stay in “calculate ” stage, in accordance with the rules of the algorithm for logical reasoning and get the correct result is only one aspect of the calculation, more importantly,