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[教材简析]本节课是苏教版教材五年级上册第一单元第一课时的教学内容,它是在学生认识了自然数、分数和小数的基础上,结合熟悉的生活情景学习这部分内容,可以加深学生对数的认识,培养学生的应用意识,也为后面进一步理解有理数的意义及进行有理数运算打下基础。教材例1通过出示三个城市某一天的最低气温,放手让学生自己去实践,体会零上温度和零下温度是以0摄氏度为基准的,是一对相反
[Textbook analysis] This lesson is the teaching content of the first unit of the first unit of the fifth grade of the Sujiao version of teaching materials, it is based on the students recognize the natural numbers, fractions and decimals, combined with the familiar life scenarios to learn this part , We can deepen the students ’understanding of logarithm and cultivate the students’ sense of application, laying the foundation for further understanding of the significance of rational numbers and rational numbers. Example 1 by showing the minimum temperature of a day in three cities, let the students go to practice their own experience zero temperature and zero temperature is zero degrees Celsius as the base, is the opposite