Unit 2 Amazing numbers 第1课时Reading 课件-2025-2026学年沪教版（2024）英语八年级上册

Unit 2 Amazing numbers Reading 阅读优质课 沪教版（2024）八年级 上 Learning objectives 1 Lead in Pre-reading 3 While-reading Post-reading 5 Vocabulary practice Summary 7 Assessment 2 4 6 8 Homework 9 By the end of the lesson, I will be able to... 1 2 3 understand the main content of the story; master the core vocabularies and their usages in the text. master the basic elements of a story’s development; 00 Learning objectives https://www.21cnjy.com二一教育 www.21cnjy.com Lead in 01 https://www.21cnjy.com二一教育 clock face Where can you see numbers? I can see numbers everywhere,such as on a clock face... calendar Ask and answer www.21cnjy.com Lead in 01 https://www.21cnjy.com二一教育 price tag Where can you see numbers? I can see numbers everywhere,such as ... charts and graphs Ask and answer www.21cnjy.com 系列 1 类别 1 类别 2 类别 3 类别 4 4.3 2.5 3.5 4.5 系列 2 类别 1 类别 2 类别 3 类别 4 2.4 4.4 1.8 2.8 系列 3 类别 1 类别 2 类别 3 类别 4 2 2 3 5 01 Lead in flight schedule flight [flaɪt] n.（尤指飞机的）航程 schedule [ˈʃedjuːl] n. 日程安排 www.21cnjy.com Jack took part in a 40-kilometer marathon and won the first prize. prize 奖赏；奖励 www.21cnjy.com Lead in 01 23℃ 17.8cm Numbers are everywhere.Why are numbers amazing?  [ˈevrɪˌweə] 到处 www.21cnjy.com 02 Pre-reading A story about numbers. Predict 1.Who are the characters? a The king and his son. b The king and an old man. c The king and his brother. www.21cnjy.com 02 Pre-reading 2.What are they doing? a Playing chess. b Growing rice. c Playing cards. Predict chessboard 64 squares  [ˈtʃesˌbɔːd]国际象棋棋盘  www.21cnjy.com While-reading 03 1. Where was the king from? 2. What was the king's favourite game? 3. Who / Whom did the king challenge to a game one day? 4. Who won the game? He was from India. Chess. A wise old man. The wise old man. Listen to the story and answer the questions www.21cnjy.com Skim the story and divide it into 3 parts. Para____ The beginning Para____ The middle Para ____ The ending 7 3.4.5.6 1.2 A. The king lost the game. He realized he didn’t have enough rice to give the old man. B. The king promised to give the old man the rice he wanted if he won the game. C.The king challenged the old man to a chess game. C B A While-reading 03 www.21cnjy.com While-reading 03 Read Para.1-2 carefully and judge the statements. The old man and the king A long time ago, there was a king in India. The king’s favourite game was chess. One day, a wise old man came to the palace and the king challenged him to a game. “You can have any prize if you win the game.” the king promised the old man. 1.The king liked playing chess. 2.The old man challenged the king to a chess game in the palace. 3.The king gave a promise to the old man. T F The king the old man T challenge:v.向……挑战……;n.挑战 challenge sb. to sth. promise:v.许诺;promise to do n.许诺:make a promise www.21cnjy.com While-reading 03 Read Para.3-6 carefully and match the sentences with the characters. He wanted to have 2n-1 grains of rice put on each square of the chessboard. He offered gold or silver. He wanted only rice. silver ['sɪlvər]银  www.21cnjy.com While-reading 03 The old man thought for a moment and said slowly,“If I win the game, I'd like one grain of rice for the first square of the chessboard, two for the second, four for the third …I'd like you to double the amount for each of the rest of the squares.” 我想让你把剩下的每个方格的数量加倍。 (1) rest n. 剩余部分 常用词组: the rest (of sth.) (2) rest v. / n. 休息 How would you like to spend the rest of the day? 一粒米  一会儿  www.21cnjy.com While-reading 03 The king was very surprised. “Is that all?” he asked. ''Wouldn't you like gold or silver instead?" “No, just rice.” the old man replied without hesitation. ''How many grains of rice will this be?” the king wondered, “There are 64 squares on the chessboard, so there will be one, two, four, eight, sixteen… Perhaps a bag of rice is enough.” After thinking about it for a moment, the king agreed. reply [rɪˈplaɪ] 回答  hesitation [ˌhezɪˈteɪʃən] 犹豫 毫不犹豫 wonder [ˈwʌndə] 想知道 agree [əˈɡriː] 同意 www.21cnjy.com Read Para.6 carefully and answer some questions. 1.What was the result of the chess game? 2.What was the problem that the king met? While-reading 03 The old man won the game. He didn’t have enough rice to put on all the squares of the chessboard. The king and the old man played the game for a long time. Finally the old man won, so the king ordered his men to collect a bag of rice. The king's men put one grain on the first square, two on the second, and so on. After a few squares, the king realized the problem—even with all the rice in the country, he would still not have enough rice to put on the chessboard! order sb. to do sth.意为“命令某人做某事” www.21cnjy.com 03 While-reading www.21cnjy.com Identifying the elements of a story The key elements of a story include the characters人物, setting背景 , plot情节, conflict冲突 and theme主题. They help you understand the story better. Can you identify these elements in the above story? 03 While-reading www.21cnjy.com 03 While-reading Story Who When Where What the king and an old man a long time ago in India playing chess Beginning Middle End Elements of a story www.21cnjy.com While-reading 03 1 Complete the table with the information from the story on pages 20-21. Setting Time place characters plot Beginning Middle End A long time ago In India The king and the old man A long time ago, an old man came to challenged the king to a chess game, promising any prize if the old man won. The old man asked for rice as a prize, with the amount doubling for each square of the chessboard .The king agreed. The king lost the game. He realized he didn’t have enough rice to give the old man. 1. 2. 3. 4. The king and the old man 5. 6. www.21cnjy.com While-reading 03 2 Read the story again and find evidence to support the statements below. (1)The king loved to play chess. (2)The king thought the old man asked for too little. (3)The king did not have enough rice for the old man. “Is that all?” asked the king. Wouldn＇t you like gold or silver instead?” The king＇s favourite game was chess. The king quickly realized the problem-even with all the rice in the country, he would still not have enough rice to put on all the squares! www.21cnjy.com 3 Discuss the questions below. (1) How many grains of rice should the king put on the last square? Post-reading 04 9，223， 372， 036，854，775，808 grains of rice. www.21cnjy.com (2) What do you think happened next? 04 Post-reading The king said :"As a king, I must keep my promise. However, the country really doesn't have so much rice."The old man saw the king was honest, so he said, "You don't need to give me so much rice. Just remember to think carefully before you make a promise next time." The king was very happy and thanked the old man. From then on, the king became more careful with his words. www.21cnjy.com 04 Post-reading Role-play the story in your group. 1.Get your role: the old man,the king,the guard 2.Create the scenes: Scene 1： Encounter with a Challenge Scene 2: Negotiating the Reward Scene 3: The Rice Crisis 3.Practice Pay attention to the body language. www.21cnjy.com Show time Talk clearly (内容清晰) Pronunciation(发音标准) Body language(使用肢体语言) Fluently(流利的) Grade and share: www.21cnjy.com 04 Post-reading Please make discussion with partners. Why did the king lose the game? Promise Number Never make a promise without thinking before! Numbers have great power! www.21cnjy.com When you wonder about something (2) If you promise to do something (3) You may win a prize (4) You will win the silver medal (5) If your friend challenges you to a chess game a you are very sure you will do it. b he/she wants to see if he/she can win. c if you come second in the race. d you think about it with curiosity and want to know more about it. e if you do well in the race. 05 Vocabulary practice 1 The word in italics from the story on page 21-22.Match the sentence halves. www.21cnjy.com 2 Complete the story with the words below. Change the form if necessary. hesitation prize promise reply wonder A poor young man came first in a running race and won some gold as a (1)______ . He looked at the small piece of gold in his hand and (2)_________ what to do with it . The young man decided to ask a wise oldman for advice. “I have a little gold now, but I want much more,” he said. “Can you help me?” The old man looked at him. “I can teach you how to make more money if you (3)___________to work hard.” he said. prize wondered promise Vocabulary practice 05 www.21cnjy.com The young man agreed without(4)___________Then the old man pointed out of the window, “Look outside. What can you see?” he asked. “I can see nothing but an empty field.” The young man (5)___________. “Use your money to buy this fields,” said the old man, “and grow some cotton. In a year, you can sell the cotton and make a profit” The young man followed his advice and worked hard all year round, and in time, he became very rich. replied hesitation 05 Vocabulary practice www.21cnjy.com Make sentences using the words and phrases below. promise surprise wonder challenge... to double the amount realize the problem without hesitation I __________ to finish my homework before dinner. The news of her promotion was a big ________ to everyone. I ______ if it will rain tomorrow. He __________ me to a game of chess. We need to ______ the amount of donations to reach our goal.It took her a while to ______ the problem with her plan. She agreed to help _______________ when I asked her. promise surprise wonder challenged double realize without hesitation 05 Vocabulary practice www.21cnjy.com the elements of a story who where when what: beginning, middle, end Useful phrases promise to do order sb to do sth challenge sb to sth for a moment without hesitation one grain of rice The old man and the king Summary 06 www.21cnjy.com 一、根据句意和所给的首字母填空。 1. I don’t like coffee. I will have some tea i________ . 2. Class One got the first p_______ in the school football game. 3. Tom, these candies are for you, and the r_______ are for your brother. 4. I sent Alice three emails,but she didn’t r_______ to any of them. 5. He gave me his telephone n_______ and asked me to call him if necessary. nstead rize est eply umber Summary 06 Exercises www.21cnjy.com 二、根据句意和所给出的中文提示写出所缺单词。 1. The little boy is good at playing _____ (国际象棋). 2. The price of potatoes __________(加倍) last week. 3. I can’t_______ (同意) that pupils bring their mobile phones to school. 4. I can _______ (许诺) you to go there with you after work. 5. Gold is more expensive than _______（银）. chess doubled agree promise silver Summary 06 Exercises www.21cnjy.com Unit 2 Amazing numbers --Reading the elements of a story who where when what: beginning, middle, end The old man and the king Useful phrases promise to do order sb to do sth challenge sb to sth for a moment without hesitation one grain of rice www.21cnjy.com Assessment 08 Self-assessment I can understand the main content of the story. I can master the basic elements of a story’s development. I can master the core vocabularies and their usages in the text. www.21cnjy.com Basic (基础) Read the article aloud three times. Improving(提升) Finish the exercise book about this lesson. Extend (拓展) Add a new ending to the story. Homework 09 www.21cnjy.com null 84816.0 Lavf58.20.100 $$A long time ago, there was a king in india. The king's favorite game was chess. One day, a wise old man came to the palace, and the king chAllenged him to a game. You can have any Price if you win the game. The king promised the old man. The old man thought for a moment and said, slowly, if I win the game, i'd like one grain of rice for the first square of the chessboard, two for the second, for for the third. I'd like you to double the amount for each of the rest of the square. The king was very surprised. Is that all he asked, wonder you like gold or sovereign stead? No, just rice. The old men replied, without heating, how many grains of rice will this be? The king wondered. There are sixty four squares on the chess ort, so there will be one, two, four, eight, sixteen, perhaps a bag of rises enough. After thinking about IT for a moment, the king agreed. The king and the old man played the game for a long time. Finally, the old man won, so the king ordered his men to collect the bag of rice. The king's men put one grain on the first square, two on the second, and so on. After a few squares, the king realized the problem. Even with all the rice in the country, he would still not have enough rice to put on the chessboard. The king had to have a single grain of weed put on the first square, two grains on the second, four on the third, and so on. And so for that is the number of grains of weed on the previous square always had to be doubled. The king considered his proposition too modest at first. However, later he realized that sisa ibn da here was very wise indeed and also quite sly. His scholars had calculated that the necessary amount of weed was impossible together. How did they come to that realization? IT is easy to determine the total number of grains of wheat to be put on the chessboard according to the rule devised by the wise men, using the powers of two, add one to the total amount and the track one. That way, IT does not change. However, we realized that with the extra one, the third item is exactly the some of the first two items. When we add the two ones up, the same situation holds the first two terms add up to the third one. We arrived at the number of brains of week at the end of the algorithm. We can also reach the correct result with a different method, multiple both sides of the equation for the number of grains of week by two, then subtract the original equation from the new one. The power powers occurring in both equations go away, thus leaving us with the value calculated with the previous method. But how big is this value? IT is eighteen quintillion four hundred and fourteen six quadrillion seven hundred and forty four trillion seventy three billion seven hundred and nine million five hundred and fifty one thousand six hundred and fifteen, which is a gigantic twenty digit long number. IT is a calculation t that there is not that much wheat on the entire planet. What is more, humanity has not yet produced that much wheat through its entire history, although that number does not seem so terrifying. When IT is written down, IT size cruel shows when one imagined that this amount would cover the entire globe in a nine millimeter seek layer. If we put IT in twelve meter long trucks that could take twelve tones each, the convoy of trucks would be seventy million, ninety seven thousand, six hundred and seventy four point seven kilometers long. That convoy could then circle the planet at the equity more than seventeen thousand five hundred and twenty four times. If we look at IT from another perspective, its length would be the distance between the earth and the moon. Multiply by one thousand eight hundred and twenty five. Based on these facts, we can safely say that the king probably did not end up handing over the modest amount of weed. The wise man with the funny disposition had requested sisa eba. He's invention, however, went on to become a global phenomenon. today. IT is known and played in every corner of the world, not giving a single thought to the wheat apocalypse that lies unseen on the board.