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1、 RevisionRIVISION OF THE WORDSabacusbrain calculatorlightning1. _: almost2. _: correct and true 3. _: strong4. _: of or like people, not animals 5. _: on the other side in a game, fight, etc.6. _: a group of things that work together7. _: grow bigger or stronger;become better8. _: give orders to a c
2、omputernearlyaccuratepowerfulhumanagainst SAY AND SPELL THE WORDS ACCORDING TO THE MEANINGSsystemdevelopprogram9. _: USE NUMBERS TO FIND ANSWERS A _ is a _ machine. It helps people to _ faster and more accurately because it can do a difficult _ in a flash.calculatorcalculating calculate calculationc
3、alculatecalculate(v.)计算 calculation(n.)计算calculator(n.)计算器 calculating(adj.)计算的10. _: MAKE FOR THE FIRST TIMEBenjamin Franklin was a famous _ .He _ the lightning rod（避雷针).It is a great _.inventorinventedinventioninvent (v.)发明inventor (n.)发明家invention (n.)发明invent 11. _: THAT ARE GOING TO BE MENTIONE
4、D NEXTCan you answer the _ questions?_ me please. Ill show you the way.followingFollowfollowingfollowing (adj.)下列的follow (v.)跟随12. _: NOT DEAD Can all _ things _ for several days without food?13. _ : very surprising We felt _ when we read the _ story.livingliveamazedamazingliving (adj.)活着的 live (v.)
5、生活livingamazingamazing (adj.)令人惊奇的amazed (adj.)感到惊奇的 REVISION OF THE PHRASESSAY THE PHRASES ACCORDING TO THE MEANINGS 1. _:long,long ago 2. _: not less than 3. _: in a very short time 4. _:not in the same way 5._:in all ones life 6. _: work out the problemin ancient timesat leastin a flashin differe
6、nt waysin ones whole lifetimesolve the problem 1. We can use water _, such as washing clothes or cooking food. 2. Li Bai was a great poet who lived _. 3. It took us one hour to _at least in a flash in ancient times in different ways solve the problem in ones whole lifetimein different waysin ancient
7、 timessolve the problemAT LEAST IN A FLASH IN ANCIENT TIMES IN DIFFERENT WAYS SOLVE THE PROBLEM IN ONES WHOLE LIFETIME4. Your teacher looks old. He must be _ 50 years old.5. My father lived in China _.6. The computer finished the calculation _.at leastin his whole lifetimein a flashKEEP THE SAME MEA
8、NING OF EACH SENTENCE1. I spent two days doing this job. It _ me two days _ do this job.2. He is strong. He can carry the heavy suitcase. He is _ strong _ he can carry the heavy suitcase. He is strong _ _ carry the heavy suitcase.tooktosothatenoughtoRevision of the sentence structures3. The coat is
9、expensive. He cant buy it. The coat is _ expensive _ he cant buy it. The coat is _ expensive for him _ buy. The coat is not _ _ for him to buy.sothatcheapenoughtootoREVISION OF THE PASSAGEANSWER THE QUESTIONS ABOUT THE TEXT1.What did people write in many different ways? 2. In what way did people cou
10、nt?3. Who invented the zero?4. Why was the zero a very important invention?People wrote numbers in many different ways.People counted in tens.The Indians invented the zero.Because it made it easier to write big numbersand to calculate. 5. Which was one of the first calculating machines? 6. Why do pe
11、ople still use abacuses today? 7. What can a modern electronic calculator do? 8. Why do we say computers are very powerful?One of the first calculating machines was an abacus.Because they are fast and accurate.It can add, subtract, multiply and divide. It can also calculate percentages and square ro
12、ots.Because it can do a calculation that you could not do in your whole lifetime in a flash. 9. How long did Shakuntalas brain take to find the answer?Shakuntalas brain took fifty seconds to find the answer.FILL IN THE BLANKS ACCORDING TO THE PASSAGE Everyone knows the international _ of numbers. In
13、 ancient times, numbers were written in _ ways, but counting was nearly always in _. Everyone uses the number _ 1 to 9 plus zero. The system was invented by the Indians. _ makes it easier to write big numbers and to _. languagetenssystemZerocalculatedifferent There are three calculating machines, th
14、e abacus, the modern _ calculator and the computer. Which is more powerful, the computer or the human _? There was a competition between an amazing lady who is from _ and a powerful computer. However, the lady won. Her brain _ less time to find the answer, like _. Computers cant do anything by thems
15、elves. Someone had to first _ the computer.electronicbrainIndiatooklightningprogramWHAT IS EACH PART MAINLY ABOUT?P1: different ways of writing ancient numbersP2: the system of numbersP3: three calculating machinesP4: a powerful living computerGROUP DISCUSSION In what way can computers help us in daily life? calculate find play buy talk study teach keep type print draw solve help.to use. to.with. make it easier to.HOMEWORK 1. Read and try to recite the text 2. Write a passage of at least 60 words on the topic “My views on the computer”Goodbye
八年级英语：Chapter 4 Numbers：Everyone’s language复习课件上海牛津版
