除数是整数的小数除法(竖式)的教学,往往是按照整数除法法则求商后,再告诉学生点小数点的方法(即“先商后点”的方法)。这种教法的根据是“商的变化规律”,由于它的思路曲折,学生难于理解。特别是计算以后,还要回过头来点小数点,学生容易忘记这一步工作。为克服这种缺点,我采用“边 The divisor is an integer decimal division (vertical) teaching, often in accordance with the law of integer division after the business, and then tell students to point the decimal point method (that is, “after the business point of” approach). The basis of this teaching method is “the changing law of business,” which is hard for students to understand because of its twists and turns. In particular, after calculation, but also back to the decimal point, students tend to forget this step work. To overcome this shortcoming, I use the "edge