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【目标预设】1.让学生在教师所创设的情境中感受为什么需要产生百分数,理解百分数的意义;学会正确地读写百分数,理解百分数与分数之间的联系与区别。2.在解决实际问题过程中,体验百分数与生活的密切联系,增强数学意识,培养良好的数感。培养学生积极思考、敢于质疑的良好学习习惯。【重点、难点】1.理解百分数的意义。2.百分数意义的理解及百分数数感的培养;理解百分数与分数的联系与区别。【教学过程】一、板书揭示课题师:课前让同学们找生活中的百分数,找到了吗?今天我们一起来认识百分数。(板书:百分数的认识)
【Goal】 1. Let the students feel in the context of the teachers created why the need to produce percents, understand the meaning of percents; learn to read and write the percentage correctly, understand the relationship between percents and scores and differences. 2. In the process of solving practical problems, experience the close relationship between percentage and life, enhance the mathematical consciousness and cultivate a good sense of number. Students develop positive thinking, daring to question the good study habits. 【Key, difficult】 1. Understand the meaning of percentage. 2. Understand the meaning of percentile and percentile training; understand the relationship between percentile and score and the difference. 【Teaching process】 First, the blackboard reveals the subject teacher: Before class let the students find the percentage of life, found? Today we come together to understand the percentage. (Blackboard: perceived percentage)