我在教学小数四则混合运算一节时,首先复习整数四则混合运算的顺序,然后应用知识迁移规律,让学生通过新旧知识对照,分析和尝试计算,用较少的时间,学生就理解和掌握了小数四则混合运算的顺序。但在具体的计算中却常出错,为了弥补这一不足,我注意有层次、有梯度地设计练习题,在引导学生熟练掌握运算顺序过程中,提高计算正确率。 When I am teaching a decimal four-hybrid operation, I first review the order of the four mixed arithmetic operations. Then I apply the rule of knowledge transfer, so that students can analyze and try to calculate through old and new knowledge. In less time, students understand and master Decimal order of four mixed operations. However, it often makes mistakes in the concrete calculation. In order to make up for this problem, I pay attention to the design of exercises with different levels and gradients, and improve the accuracy of calculation in guiding students to master the operation sequence.