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教学内容:人教版小学数学一年级下册第二单元——十几减9。教学目标:1.使学生知道可以用多种方法计算十几减9,能正确计算十几减9的式题。2.通过独立思考与合作交流,理解计算十几减9的算理,掌握计算的方法。3.使学生具有初步的探究意识与合作交流的意识。教学重点:用多种方法计算十几减9的计算方法。教学难点:正确表述多种算法计算十几减9的算理。教学准备:课件、计算小卡片、小棒。教学过程:一、创设情境,提出问题“小小魔术师”──“十几减9”。师:同学们,大家喜欢魔术吗?生:喜欢。师:今天老师给大家请来了一位小魔术师,大家高
Teaching content: PEP Primary School Mathematics Grade Two Volume Two - minus ten. Teaching Objectives: 1. To enable students to know that you can use a variety of methods to calculate a dozen minus 9, can correctly calculate more than a dozen minus 9 formula. 2. Through independent thinking and cooperation and exchange, understand the calculation of more than a dozen calculations, master the calculation method. 3. To enable students to have a preliminary awareness of exploration and cooperation and exchange of consciousness. Teaching Focus: Calculate more than a dozen minus nine with multiple methods. Difficulties in teaching: the correct expression of a variety of algorithms to calculate more than 10 minus 9 arithmetic. Teaching preparation: courseware, computing small cards, sticks. Teaching process: First, create the situation, ask questions “little magician ” - “more than a dozen minus nine ”. Teacher: Classmates, do you like magic? Teacher: Today, the teacher invited everyone to a little magician, everyone high