指导思想以一位数除两位数的算理为基础,让学生通过运用学具,动手动脑,加深理解除法要从最高位除起的算理,引悟出一位数除三、四位数只要按照一位数除两位数的计算方法依次类推,顺序计算,从而掌握规律。在培养学生探究能力的同时发展学生的思维。教学过程一、复习 1.口算。(要求说出商、用哪一句口诀、商写在被除数的哪一位上面) The guiding ideology is based on the arithmetic of one-digit addition to two-digit numbers, which enables students to grasp the one-digit addition to the three or four digits As long as the number in accordance with the one-digit addition to two-digit calculation followed by analogy, the order of calculation, in order to master the law. Develop student's thinking while cultivating student's inquiry ability. A teaching process, review 1. Mouth count. (Asked to say business, which sentence to use, written in what was the top of the dividend)