人教版小学数学教科书四年级下册主要建模点分析与教学建议

• 作 者: 王静
• 机 构: 济南市经十一路小学,
• 出 处: 山东教育
• 发表日期: 2004年期
• 关键词: 混合运算 人教版 乘法分配律 教学建议 小数的 小数点移动 同级运算 乘法运算定律 第一学段 脱式计算

建模点1:四则混合运算的顺序模型教学内容:第一单元四则运算例1—例5简要分析:四则运算是指加、减、乘、除四种运算,而在一道试题中含有两种或是两种以上运算的称作四则混合运算。本单元主要教学并梳理混合运算的顺序,因此,严格地讲本单元课题应为四则混合运算。对于混合运算学生在二年级已经学会按从左往右的顺序计算两步式题,并且知道小括号的作用,这里主要教学含有两级运算的运

Modeling point 1: Four mixed operation sequence model Teaching content: The first unit Four operation example 1- Example 5 Brief analysis: The four operation is the addition, subtraction, multiplication and division of the four operations, and in a question contains two Or more than two kinds of computing called the four mixed operation. This unit is mainly teaching and combing the order of the mixed operations, so strictly speaking, the unit should be subject to four mixed computing. For mixed computing students in the second grade have learned to calculate two-step questions in order from left to right, and know the role of parentheses, where the main teaching contains two-level operation of the transport