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教学内容:人教版数学三年级上册第22、23页例1及相关练习。教学过程:一、复习旧知1.列竖式计算。76-7 530-350(指名板演,其余学生自练,并说说计算过程)提问:这是我们已经学会的笔算减法,做笔算减法时要注意什么?师生小结:相同数位上的数对齐。个位不够减向十位借1;十位不够减向百位借1。(贴于黑板上)2.揭题板书:减法二、新课展开1.创设情境,引出算式。出示路线图(图1),提问:从图中你获得了哪些数学
Teaching content: PEP mathematics third grade Volume 22, 23 Example 1 and related exercises. Teaching process: First, review the old 1. Column vertical calculation. 76-7 530-350 Questionnaire: This is what we have learned the pen and bank subtraction, pen and subtraction subtraction should pay attention to what? Teacher and students Summary: The same number of digits Align. Not enough to reduce the number of ten to borrow a; (Affixed to the blackboard) 2. Uncovering the placard: Subtraction 2, the new lesson expansion 1 Create a situation, leads to the formula. Show the road map (Figure 1) and ask: What maths did you get from the graph?