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数的运算历来是小学数学教学的重要内容。在践行新课改的前期,学生计算的速度及正确率普遍有所下降,笔算的基本技能偏低,不善于用草稿纸列竖式计算,对运算兴趣淡化。其主要原因是计算教学依赖于问题情境,追求算法多样化,练习流于形式等。那么,计算教学怎么教?我的理念是:重算理、重笔算、重纠错;轻口算、轻估算、轻简算。严格按算法、算序、算律,练出迅速、正确计算的硬功夫与合理、灵活简算的软技巧。
The number of operations has always been an important part of primary mathematics teaching. In the early stages of practicing the new curriculum reform, the speed and correctness of students’ calculation generally declined. The basic skills of writing calculations were low. They were not good at using vertical calculation of draft paper columns to dilute the interest in computing. The main reason is that calculation teaching depends on the problem situation, the pursuit of algorithm diversity, practice flow in the form. So, teaching how to teach teaching? My philosophy is: re-calculated, heavy pen count, error correction; light mouth count, light estimates, light simple calculations. In strict accordance with the algorithm, algorithm, arithmetic, practice quickly and correctly calculated hard and reasonable, flexible and simple calculation of soft skills.