“（／以内数的读定和写法”是小学数学第七册的重点内容＊二7来学生理解、掌握教的概念，过百亿以内数加减法计算的是础。一、申出起林知识结构，明确回学自标不牵元教材内容分三小8：记以内缴的读法、记以内数的写透和数的大小比较及改写。教学巨而是亿以内数的烦写。连一部 “(/ Within the number of reading and writing,” is the seventh volume of primary school mathematics key content * 2 7 students to understand and master the concept of teaching, more than billions of dollars less than the number of addition and subtraction is the basis for calculation. The structure of knowledge, clear back to school self-standard does not pull the yuan Teaching material content is divided into three small 8: The book to pay within the reading method, the number of written records and the number of the number of comparison and rewrite the size of teaching giants but less than the number of annoying. Even one