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课件网) Unit 2 Amazing numbers 主题范畴： 人与社会 主题群： 历史、社会与文化；科学与技术 子主题： 对世界、国家、人民和社会进步有突出贡献的人物；科学技术与工程，人类发明与创新 Key question What is the role of numbers in our daily lives master the meanings and usages of some key words; extract the key information on the development of numbers from the text； understand the culture of numbers and experience cultural diversity. Learning objectives 学习目标 At the end of the class, I’ll be able to: count system symbol represent exactly write down instead of /ka nt/ v. 计算（或清点）总数 / s st m/ n. 系统 / s mbl/ n. 符号；记号 / repr zent/ v. 代表 / ɡ z ktli/ adv. 准确地；确切地 写下；记下 代替；作为······的替换 New words and phrases Warming up How many kinds of number forms do you know And how did numbers develop Numbers are everywhere today. How did people in ancient times record numbers Lead-in Section 4 Extending and developing competencies Pre-reading What do you think the passage will talk about Which ancient country’s number system may be mentioned Look at the title and the picture While-reading Read the article after the recording. 不同文化背景的人使用不同的数字。下面是数字1到5的三种写法。 中国数字：一、二、三、四、五 罗马数字：I、II、III、IV、V 阿拉伯数字:1、2、3、4、5 Skimming What’s the main idea of the passage A. How people count animals in ancient times. B. The development history of number systems. C. The difference between Roman numerals and Arabic numerals. D. Why tally sticks are not used today. Scanning Read and match. Time/Region Number System Ancient times Ancient India Ancient Rome tally sticks, draw one stick for each thing abstract symbols, no real-life shapes Roman numerals, use letters like “XII” How did Indian numerals become Arabic numerals and spread Find the key information in the text. Discussion Compare Roman numerals and Arabic numerals. What are their advantages or disadvantages XII vs 12 Ancient Roman numerals were written in a complex way. Arabic numerals are more simple. Post-reading In modern life, do we still need traditional number systems like Roman numerals Why or why not While Roman numerals have cultural, historical, and aesthetic value that justifies their preservation in certain contexts, they are not necessary for the practical, day-to-day functioning of modern society. However, they still hold importance in preserving our cultural heritage and providing educational and aesthetic diversity. Practice In ancient times, people developed a counting system called (1)_____. Later, people replaced this system with abstract (2)_____. These were more convenient because they were quicker to write. The numbers we use today are called (3)_____. They were invented in (4)_____. Thanks to the (5)_____, this system spread to other parts of the world. Sometimes we also see numbers written with (6)_____ on clock faces and buildings. These are called Roman ... ...
