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2013版苏教版数学第一单元是《两三位数乘一位数》,本单元一共有课时17课时.学习内容较多,范围较广,对乘法竖式计算的要求较高.三年级作为低高年级的重要过渡期,同时也是计算逐步深入的学段.学生第一次接触竖式计算有很多不适应.在教学和练习过程中,笔者发现有很多问题:学生有的计算习惯较差导致计算错误,有的不懂算理只会算法导致算后不理解意义,有的数感较差对于估算问题无从下手,有的思维定
The 2013 version of the first version of the Sujiao version of mathematics is “two or three digits by a single digit”, the unit has a total of 17 hours of class hours. Learning more, a wider range of vertical multiplication requirements higher. As an important transitional period of low and high grades, but also calculate the gradual deepening of the section.Students first contact with the vertical calculation has a lot of incompatible.In the teaching and practice process, I found that there are many problems: students have some computing habits than Poor lead to calculation error, some do not understand the algorithm will only lead to algorithms do not understand the meaning of the calculation, and some sense of the number of poor for the estimation of the problem can not start, and some thinking