“九义”数学第七册“简单的小数加、减法”一节，是在亿以内的整数加法和初步认识小数含义的基础上教学的。教材通过计算钱数的应用题来讲小数加、减法的计算法则，其所编排的小数加、减法法则仅限于教师提出：“小数加减法与整数加减法有什么相同点？要注意什么？”没有用文 The section “Simple Decimal Addition and Subtraction” in Book Seven of the “Nine Meanings” Mathematics is taught on the basis of the addition of integers and the initial understanding of the meaning of decimals within a hundred million words. Textbook through the calculation of the amount of money on the application of questions about the decimal addition and subtraction of the law of computing, the arrangement of the decimal addition and subtraction law is limited to teachers put forward: “Decimal addition and subtraction and integer addition and subtraction What are the same points? ? ”No use of the text