Unit 4 reading2 课件 2023-2024学年牛津上海版（试用本）八年级英语上册

Module 2 Unit 4 Numbers STUDY Reading：Numbers: Everyone’s language ② 0 Watch the video clip. Because we can’t calculate all maths problems ourselves. Answer the questions. 5. What does an electronic calculator allow us to do? The Indians. 2. What inventions are mentioned in the video clip? 1. Why do we use machines to help us with mathematics? Numbers and systems like abacuses, electronic calculators and computers. 3. Who invented and developed the number zero? 4. What is the most basic non-electronic calculator? An abacus. 6. What is the advantage of a computer? It can solve difficult problems in a flash. 7. What is the video clip mainly about? It’s about ________________ that make working with numbers easier. systems/inventions It allows us to add, subtract, multiply, divide, find percentages and square roots. do all kinds of calculations. Think and answer the questions. What type of text is this? It is an informational text. What is the main purpose of the text? Where can you probably find this article? a) To inform（告知） b) To entertain（娱乐） c) To persuade（劝说） In a history, math or science textbook, a magazine or on a website. √ subheadings pictures Subheadings play an important role in holding the readers’ attention. What makes good subheadings? direct and to the point 紧扣主题 interesting consistent 保持一致性 a) length b) structure short and clear Read the subheadings of the text. Ancient numbers Zero Calculating machines Brain against computer Are they short and clear? √ Are they of similar length? √ Are they consistent (一致的) in structure? √ A topic sentence A topic sentence is the most important sentence in a paragraph. It summarizes (总结) the information in the paragraph. In most cases, a topic sentence appears at or near the beginning or the end of a paragraph. Read “Ancient numbers” . Underline the topic sentence. What else about ancient numbers is discussed? People counted in tens. In ancient times, people had different number writing systems