“折扣”、“税率”、“利率”都是百分数在生活中的具体应用。新教材在结合生活实际培养学生解决问题的能力方面是很费一番苦心的。打几折就是原价的十分之几或百分之几十,这个含义理解之后,就要在分数、百分数应用题的基础上进行学习了。让学生在百分数的意义即“求一个数的百分之几是多少”的基础上来学习了。如果老师通过判断单位“1”的变式训练来发展学生的能力,手段也算很好,效果也会很不错。如: “Discount ”, “Tax Rate ”, “Interest Rate ” are all percentage-specific applications in life. The new textbook is a lot of pains in cultivating students’ ability to solve problems based on the actual situation of life. Playing a few off is the original price of a few or tens of dozens of understanding of this meaning, it is necessary in the scores, the percentage of application questions based on the study. Let students learn on the basis of the meaning of percentages, ie, “What percentage of a number?”. If the teacher through the judge unit “1 ” variant training to develop the ability of students, the method is also considered good, the effect will be very good. Such as: