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小学数学中的简便运算是新课程标准要求计算策略多样化和最优化的体现。学好乘法运算定律,可以很好地提高乘法运算能力,加快运算速度,同时锻炼学生的思维开拓能力。在乘法运算定律中,乘法交换律对学生比较容易接受,乘法结合律和乘法分配律在新授课时掌握得较理想,不过综合应用时往往张冠李戴、错误连连。本文就此进行了分析。
The simple math in elementary mathematics is a reflection of the diversity and optimization of computational strategies required by the new curriculum standards. Learn a good law of multiplication operation, can well improve the multiplication ability, speed up the operation, at the same time train students’ thinking to develop ability. In the law of multiplication, the law of multiplication and exchange is more acceptable to students. The law of multiplication and combination and the law of multiplication and grasping are more ideal when new lectures are given. However, when applied in a comprehensive way, they are often mistaken. This article has carried on the analysis to this.