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教学内容:九年制义务教育课本(上教社),三年级(上)第46页例4(连续退位减法)。教学目标:1.理解“连续退位减法”的算理;2.正确计算连续退位减法式题;3.培养学生的探究和思维能力。教学过程:一、复习1.教师出示下列两题,要求学生列竖式计算。①1546-352= ②9010-4608=然后请学生说说你是怎样计算的。这样既复习了旧知识,又为教学新知识准备了方法(思维)。2.教师过渡:这是前一节课学习的内容,这节课,我们要继续学习“退位减法”(板书)。
Teaching content: Nine-year compulsory education textbook (上教 社), third grade (上) 第 46 页 Example 4 (continuous abortion minus). Teaching Objectives: 1. To understand the “continuous abatement subtraction algorithm”; 2. Correct calculation of continuous abatement subtraction formula; 3. To develop students' ability to explore and thinking. Teaching process: First, the review 1. The teacher shows the following two questions, requiring students to calculate the vertical calculation. ① 1546-352 = ② 9010-4608 = Then ask the students to talk about how you calculated. This not only reviewed the old knowledge, but also for the teaching of new knowledge prepared a way (thinking). 2. Teacher transition: This is the content of the previous lesson. In this lesson, we will continue to learn the “absentee subtraction method” (blackboard).