一、教材简析多位数四则运算是整数四坝运算四个循环圈中的最后一个;而除数是两、三位数的除法又是多位数四则运算的最后部分,是对整数四则基础知识的进一步概括和提高,即:既对整数教学进行了总结,又为小数、分数的系统学习奠定了基础。所以,本单元 First, the textbook analysis Multi-digit four arithmetic integer four dam operation four loops in the last one; and the divisor is two, three-digit division is the last part of the multi-digit four arithmetic is Integer four basic knowledge of further summarized and improved, namely: not only summarize the whole teaching, but also for the decimal, fractional system learning laid the foundation. So, this unit