资源简介

(共53张PPT)
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 pronunciation, meaning and usage of key words in the text;
grasp the main contents of the text by skimming;
precisely extract detailed information such as the rules of changes in the number of rice grains in the story;
experience the wide application and significant role of numbers in life.
Learning objectives 学习目标
At the end of the class, I’ll be able to:
flight /fla t/ n. （尤指乘飞机的）航程
schedule / edju l/ n. 日程安排
everywhere / evriwe (r)/ adv. 到处；各个地方
challenge / t l nd / v. 向（某人）挑战
prize /pra z/ n. 奖赏；奖励
promise / pr m s/ v. 承诺；保证
chessboard / t esb d/ n. 国际象棋棋盘
silver / s lv (r)/ n. 银
reply /r pla / v. 回答；答复
New words and expressions
hesitation /hez te n/ n. 犹豫
wonder / w nd (r)/ v. 想知道；琢磨
agree / ɡri / v. 同意；赞成
flight schedule 航班时刻表
price tag 价格标签
for a moment 片刻；一会儿
without hesitation 毫不犹豫
What amazing things do you know about numbers
First thoughts
Numbers in different cultures
Chinese Culture
Lucky numbers:
8 (八): Sounds like “prosperity” (发).
6 (六): Associated with “smoothness” (溜).
9 (九): Sounds like “longevity” (久).
Unlucky numbers:
4 (四): Sounds like “death” (死).
7 (七): Sometimes associated with mourning (e.g., the 7th day after a death is a ritual day).
Western Cultures
Lucky numbers:
7: Considered lucky in many Western contexts, linked to religion (7 days of creation in Christianity, 7 virtues) and folklore (7 wishes, 7 dwarfs).
3: Symbolizes completeness (e.g., “third time’s the charm”).
Unlucky numbers:
13: Infamous as “unlucky”. Many buildings skip the 13th floor.
Types of numbers
Roman numerals
Chinese numerals
Arabic numerals
Numbers used in our daily life
Numbers are everywhere. Look at the pictures and discuss where you can see number in your daily life.
clock face
flight schedule
Pi, when written as a decimal (小数), never repeats and never ends. There are about 62 trillion (万亿) and 800 billion (十亿) digits (数字) in pi.
What is special about π
π: irrational number 无理数（无限不循环小数）
There is only one number spelled with the same number of letters as itself.
Zero is the only number that can’t be represented in roman numerals.
…
Why are numbers amazing
How do we use numbers to record and present information
How do we use numbers in daily life
How did numbers develop
Look at the pictures and predict what the story is about.
chess
the king
an old man
Pre-reading
While-reading
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.
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 chess board, two for the second, four for the third ... I’d like you to double the amount for each of the rest of the squares.”
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.
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!
Identifying the elements of a story
The key elements of a story include the characters, setting, plot, conflict and theme. They help you understand the story better.
Can you identify these elements in the above story
Reading strategy
Task 1
Complete the table with the information from the story on pages 20-21.
Setting Time (1)___________________________
Place (2)___________________________
a long time ago
India
characters (3)______________________________
a wise old man and the king
Plot Beginning The king (4)________________________
____________________________________________________________________.
Middle The king and the old man
(5)________________________________.
End (6)____________________________________________________________________________________.
challenged the old man to a chess game and promised to give him any prize if he could win the game
played the game for a long time
The old man won the game and the king realized he didn’t have enough rice to give.
Read the story and decide whether the following statements are true or false.
The story happened in ancient Italy.
The king promised the old man that he could have any prize for winning the game.
The old man wanted gold or silver for the prize.
The king didn’t have enough rice to put on all the squares.
F
India.
T
F
T
only a chessboard of rice for the prize.
Task 2
c
a
b
d
The king lost the game.
The king put one grain on the first square, two on the second, and so on.
The king and the old man played the game for a long time.
The king realized he wouldn’t have enough rice to put on all the squares.
Put the following sentences into the correct order.
Task 3
Read the story again and find evidence to support the statements below.
Task 4
(1) The king loved to play games.
(2) The king thought the old man asked too little.
(3) The king did not have enough rice for the old man.
The king’s favourite game was chess.
The king was very surprised. “Is that all ” he asked. “Wouldn’t you like gold or silver instead ”
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!
263= 9,223,372,036,854,775,808 grains of rice
How many grains of rice should the king put on the last square
On the entire chessboard there would be 264 1 = 18,446,744,073,709,551,614 grains of rice, weighing about 1,199,000,000,000 metric tons (公吨).
It will take the world two thousand years to produce so much rice.
four for the third
double, the rest
not have enough
7
8
9
challenge
promise
favourite, chess
1
2
3
grain, square
one for the first
4
5
6
two for the second
Try your best to retell the story according to the pictures and the key words.
Task 5
Vocabulary practice
1 The words in italics are from the story on pages 20-21. Match the sentence halves.
(1) 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.
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 old man 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
hesitation prize promise reply wonder
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 field,” 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.
hesitation
replied
promise surprise wonder
challenge ... to double the amount
realize the problem without hesitation
Summarize the story on pages 20-21. Use the words and phrases below.
Phrases
Find the useful phrases.
1. 一位智者 ____________________
2. 挑战某人做某事 ____________________
3. 向某人承诺 ____________________
4. 思考了一会儿 ____________________
5. 一粒米 ____________________
6. 棋盘的格 ____________________
7. 数量翻倍 ____________________
a wise man
challenge sb. to sth.
promise sb. (sth.)
think for a moment
one grain of rice
the square of the chessboard
double the amount
8. 剩余的 ____________________
9. 毫不犹豫 ____________________
10. 命令某人去做某事 ____________________
11. 拿来一袋大米 ____________________
12. 等等 ____________________
13. 意识到问题 ____________________
the rest of
without hesitation
order sb. to do sth.
collect a bag of rice
and so on
realize the problem
1. One day, a wise old man came to the palace and the king challenged him to a game.
(1) challenge v.
Mike challenged me to a game of chess.
向……挑战……；向……下战书
常用词组有challenge sb. to sth.
① 迈克硬着要和我下一盘棋。
② 午饭后，他邀请我进行一场网球比赛。
After lunch, Carey challenged me to a game of tennis.
(2) challenge n.
挑战；艰巨任务
Exploring outer space is a challenge to mankind.
The role will be the biggest challenge of his acting career.
② 扮演这个角色将是他演艺生涯中最大的挑战。
① 探索外太空对人类来说是一项挑战。
根据汉语提示，补全句子。每空一词。
1. 晚饭后，凯瑞向他哥哥挑战打一场乒乓球。
After dinner, Carry __________ his brother ____
a game of table tennis.
2. 对她来说，照顾婴儿是一种挑战。
Looking after a baby is a _________ for her.
challenged to
challenge
Practise
2. “You can have any prize if you win the game”, the king promised the old man.
He promised to help us.
答应；许诺
常用词组: promise to do sth.
国王向老人承诺：“如果你赢了这场比赛，你可以获得任何奖励。”
① 他答应要帮助我们。
② 你要保证不告诉别人！
(1) promise v.
Promise not to tell anyone!
(2) promise
I never break my promise.
If you make a promise, you should keep it.
[c] n. 许诺；希望
make/keep/break a promise
许下 / 信守 / 违背诺言
① 我从不食言。
② 如果做出了承诺，就应该遵守。
1. 安娜承诺将按时到那儿。
Anna ________ that she would get there on time.
2. 不要违背诺言，否则没有人会相信你。
Don’t ______ ___ ________, or nobody will trust you.
promised
break a promise
Practise
根据汉语提示，补全句子。每空一词。
在游戏、比赛、竞赛、选举等中获胜用win，其后常跟game, race, competition, war, prize等表示“物”的词。
我们发挥很好，打败了他们。
We played very well, and we beat them.
(3) win & beat
在运动比赛等中获胜，打败了其他人或其他队用beat，其后常跟somebody, team等表示“人”的词。
win和beat都有“赢；战胜”的意思，但它们也有区别：
上次比赛他们获胜了。
They won the football match last time.
3. … I’d like you to double the amount for each of the rest of the squares.
(1) rest n.
How would you like to spend the rest of the day
Take away what you want and throw away the rest.
剩余部分
常用词组: the rest (of sth.)
我想让你把剩下的每个方格的数量加倍。
② 拿走你想要的，丢掉剩下的。
① 后半天你打算怎么过？
① I had a good night’s rest.
② Rest your eyes every half an hour.
n.
v.
(2) rest v. / n.
休息
我睡了一宿好觉。
每过半小时让眼睛休息一下。
1. 一天繁忙的工作过后，布朗先生需要休息一下。
After a day’s busy work, Mr Brown needed to ___________ ___ ______.
2. 露西昨晚看了那部电影的剩余部分。
Lucy watched ____ ____ _____ the film last night.
have / take a rest
the rest of
Practise
根据汉语提示，补全句子。每空一词。
4. Wouldn’t you like gold or silver instead
instead adv.
It will take days by car, so let’s fly instead.
John didn’t study law. Instead, he decided to
become an actor.
你不喜欢金或银吗？
代替；顶替；反而；却
它既可以放在句首，也可以放在句尾。
① 开车去要好几天，咱们还是坐飞机去吧。
② 约翰没有学法律，而是决定当一名演员。
① Give me the red box instead of the yellow one.
给我那个红盒子，不是那个黄的。
② We walked down the stairs instead of taking the lift.
我们走着下楼梯而没有乘电梯。
instead of 意为“代替；而不是”，后面可以跟名词、代词、V-ing形式或介词短语等。
根据句意，用instead或instead of填空。
1. Meimei is ill, so I will attend the meeting
__________ her.
2. Daniel didn’t reply. __________, he turned
around and left the room.
instead of
Instead
Practise
5. ... so the king ordered his men to collect a bag of rice.
(1) order sb. to do sth.
The doctor ordered her to rest for a week.
Your mother told you to be home before ten o’clock.
于是国王命令他的人去取来一袋米。
意为“命令某人做某事”，有类似结构的动词还有：ask, tell, allow 等。
① 医生让她休息一周。
② 你妈妈告诉你十点之前回家。
(2) collect v.
The package is waiting to be collected.
What day do they collect the rubbish/garbage
She’s gone to collect her son from school.
意为“领取；收走；接走”
② 他们哪天收运垃圾？
① 这包裹在等人领取。
③ 她到学校接她儿子去了。
6. ... he would still not have enough rice to put on the chessboard!
enough adj.
There is enough food for us two.
Is there enough room for me
他仍然没有足够的大米放到棋盘上！
（用于复数或不可数名词前）足够的；充足的；充分的
① 有足够我们俩吃的食物。
② 有足够的地方给我吗？
一、根据汉语提示或首字母提示，填写单词。
1. I’ll try my best, but I can’t _______(承诺) anything.
2. Laura _______(检查) her test paper again before she handed it to the teacher.
3. You should _______(加倍) your reading speed in order to finish in time.
4. Yesterday afternoon Mike __________(向……挑战) me to a game of swimming.
5. Miss Yao _______(意识到) the job wasn’t as easy as she had thought.
promise
checked
double
challenged
realized
6. — What’s your phone n_______, Mr Jones
— It’s 2669-9845.
7. Uncle Jim is a w____ man. He has taught me a lot.
8. The film is so boring. Let’s go to the park i_______.
9. My best friend Linda won first p______ in the singing competition.
10. Two old men are playing c_____ under the tree.
umber
ise
nstead
rize
hess
二、从方框中选择适当的短语并用其正确形式填空。
instead of, order sb. to do sth.,
the rest of ..., challenge ... to ...,
1. Class 3 ____________ our class ____ a football game on Monday.
2. My family moved into a flat near my school last month. Now I walk to school __________ taking a bus every day.
3. Mrs Yang ________ her son ________ sweep the floor as soon as possible.
4. Let’s put __________ the meat in the fridge, or it will go bad.
challenged to
instead of
ordered to
the rest of
1. Remember new words and phrases by heart after class.
2. Read the articles in the text book. The more you read, the faster and better you’ll understand.
3. Preview Listening on page 22.

展开更多......

收起↑