深圳牛津英语七年级Chapter4学习教案.pptx

《深圳牛津英语七年级Chapter4学习教案.pptx》由会员分享，可在线阅读，更多相关《深圳牛津英语七年级Chapter4学习教案.pptx（67页珍藏版）》请在淘文阁 - 分享文档赚钱的网站上搜索。

1、会计学1深圳牛津深圳牛津(ni jn)英语七年级英语七年级Chapter4第一页，共67页。A What do you know about?1 a decimal numbers2 a pair of odd numbers 3 a fraction4 zero5 add;plus6 subtract;minus7 mutiply;times 8 divide9 a number showing degrees10 a percentage11 a pair of even numbers12 equalsA +B 0C 5/8D E =F 13 45G 8 210H 90I J 0.82

2、K 45%L 第1页/共67页第二页，共67页。Numbers,Everyones Language第2页/共67页第三页，共67页。2456193524561935891891521=?521=?第3页/共67页第四页，共67页。Calculating Machinean abacusan abacus第4页/共67页第五页，共67页。Calculating Machinen none of the first calculating one of the first calculating machines machines n naccurateaccurate and fastand

3、fastn nrepresentrepresentbeadswires5 5,7 7 2 2 4 4 thousandsthousands hundredshundreds tenstens onesonesan abacusan abacus第5页/共67页第六页，共67页。Calculating Machinean electronic calculatoran electronic calculatoraddsubtractmultiply divide percentagesquare rootcalculatecalculate第6页/共67页第七页，共67页。Calculating

4、 Machinean electronic calculatoran electronic calculatorA:What can an electronic A:What can an electronic A:What can an electronic A:What can an electronic calculator do?calculator do?calculator do?calculator do?B:It can _,B:It can _,B:It can _,B:It can _,_,_ and _,_ and _,_ and _,_ and _._._._.A:Wh

5、at else can it do?A:What else can it do?A:What else can it do?A:What else can it do?B:It can calculate B:It can calculate B:It can calculate B:It can calculate _ and _ and _ and _ and _._._._.addsubtractmultiplydividepercentagessquare roots第7页/共67页第八页，共67页。Calculating Machinean electronic calculator

6、an electronic calculatorA:What can A:What can A:What can A:What can _ do?_ do?_ do?_ do?B:It B:It B:It B:It _._._._.A:What else can it A:What else can it A:What else can it A:What else can it do?do?do?do?B:It B:It B:It B:It _.第8页/共67页第九页，共67页。Calculating Machinen npowerfulpowerfuln na flasha flashn

7、nin your in your whole whole lifetimelifetimea computer第9页/共67页第十页，共67页。Calculating MachineA _ is a very _ calculating machine.In A _ is a very _ calculating machine.In _,it can do a calculation that you could not do _,it can do a calculation that you could not do _._.a computer computer powerful co

8、mputer powerful a flash a flash in your whole in your wholelifetimelifetime powerfulpowerful a flasha flash in your whole in your whole lifetimelifetime第10页/共67页第十一页，共67页。Read the textRead the text第11页/共67页第十二页，共67页。CompetitionCompetition第12页/共67页第十三页，共67页。Answer the Answer the questionsquestions123

9、45678第13页/共67页第十四页，共67页。Why do people still use abacuses today?n nBecause they are Because they are accurate and fast.accurate and fast.第14页/共67页第十五页，共67页。What can an electronic calculator do?It can add,subtract,multiply It can add,subtract,multiply and divide.It can also and divide.It can also calc

10、ulate percentages and calculate percentages and square roots.square roots.第15页/共67页第十六页，共67页。How fast can Shakuntala Devi calculate?She can calculate like She can calculate like lightninglightning.第16页/共67页第十七页，共67页。How long can a computer do a calculation?n nIn a flash.In a flash.第17页/共67页第十八页，共67页

11、。How long did the computer take to solve the difficult problem?A minute.A minute.第18页/共67页第十九页，共67页。What should people do to make computers calculate?n nPeople have to_ _.program them with instructions第19页/共67页第二十页，共67页。What do the beads on the wires represent?n nThey represent _ _ ones,tens,hundred

12、s,thousands and so on.第20页/共67页第二十一页，共67页。n nHow many languages do you know?Everyone knows at least two his his or her own languageor her own language and the international language language of numbers.of numbers.Numbers:everyones language（他或她自己（他或她自己(zj)的语言）的语言）第21页/共67页第二十二页，共67页。Ancient numbers I

13、n ancient times,people wrote numbers in many different ways.However,they nearly all counted in tens.different ways of writing the number 6（在古代（在古代(gdi)）（以很多（以很多不同不同(b tn)的方式）的方式）（以十为单位（以十为单位(dnwi)）第22页/共67页第二十三页，共67页。Zero The system of numbers today consists of the numbers from 1 to 9 and 0(zero).Th

14、e Indians first invented and developed the 1 to 9 system of numbers.They then invented the zero.The invention of the zero helped people write big numbers and calculate more easily.Now use each of these ten numbers once to write the biggest number.What is it?（数字（数字(shz)体系）体系）（invent.v.invention n.inv

15、entor n.）第23页/共67页第二十四页，共67页。n n1 ancient:many many years ago 1 ancient:many many years ago(a)(a)n n2 consists of:includes 2 consists of:includes(b)(b)n n3 invented:made for the first time 3 invented:made for the first time(b)(b)n n4 accurate:without mistakes 4 accurate:without mistakes(a)(a)n n5 pe

16、rcentages:amounts out of a 5 percentages:amounts out of a hundred hundred(a)(a)C1C1 Find these words in the article on page Find these words in the article on page 45.Read the words around them and 45.Read the words around them and choose the best meanings.choose the best meanings.第24页/共67页第二十五页，共67

17、页。n n A Bn n1 international a grew bigger or strongern n2 system b a group of things working n n togethern n3 developed c count with numbersn n4 calculate d strongn n5 bottom e used by more than one n n country or nationn n6 powerful f in the lowest place C2C2 Find the words in Column A in the Find

18、the words in Column A in the article and match them with the meanings article and match them with the meanings in Column B.in Column B.第25页/共67页第二十六页，共67页。n n1 A calculating machine using wires and heads.n n An _n n2 A small machine using electronic power to do calculations.n n A _n n3 A very powerf

19、ul machine for doing calculations.n n A_C3C3 What do the following descriptions refer to?Write down the What do the following descriptions refer to?Write down the correct names in the blanks.correct names in the blanks.calculatorcomputerabacus第26页/共67页第二十七页，共67页。May asks T M Li,the writer,some quest

20、ions about his article on numbers.His answers are not always clear.Read the article and make Lis answers clearer.Write one word in each blank.1 Every one knows it.Knows what?The Language of numbers.第27页/共67页第二十八页，共67页。n n 2 Long ago,people wrote them in many 2 Long ago,people wrote them in many diff

21、erent ways.different ways.n n Wrote what?Wrote what?n n Numbers.Numbers.n n3.People all count in this way.3.People all count in this way.n n In what way?In what way?n n In In tens.tens.n n4.The Indians invented that system of 4.The Indians invented that system of numbers.numbers.n n Which system of

22、numbers?Which system of numbers?n n The The 1 1 toto 9 9 system.system.第28页/共67页第二十九页，共67页。n n 5 The invention helped people write in big 5 The invention helped people write in big numbers.numbers.n n What invention?What invention?n n The invention of the The invention of the zerozero.n n 6 They are

23、 fast and accurate.6 They are fast and accurate.n n What?What?n n AbacusesAbacuses.n n 7 Computers are very powerful ones.7 Computers are very powerful ones.n n Very powerful what?Very powerful what?n n CalculatingCalculating machinesmachines.第29页/共67页第三十页，共67页。Language points第30页/共67页第三十一页，共67页。1.a

24、t least 至少(zhsho)=not less than We should recite at least 10 English words every day.反义词:at most 至多(zhdu)The concert hall can hold at most 1,000 people.第31页/共67页第三十二页，共67页。2.in ancient times 在古代(gdi)=long long ago=once upon a timeIn ancient times,people used stones as money.ancient 反义词:modern 现代(xin

25、di)的times=age n.时代(shdi)第32页/共67页第三十三页，共67页。3.consist of 由组成(z chn)=include=be made up of Our class consists of 25 girls and 30 boys.4.invent=make sth.for the first time v.发明(fmng);创造The ancient Chinese invented the compass.invention n.发明(fmng)inventor 发明(fmng)家第33页/共67页第三十四页，共67页。5.develop=grow bet

26、ter or bigger v.发展(fzhn);发育 development n.发展(fzhn)The Indians first invented and developed the 1 to 9 system of numbers.developing adj.发展(fzhn)中的developed adj.发达的India is a developing country.The USA is a developed country.第34页/共67页第三十五页，共67页。6.help sb(to)do sth.=help sb.with sth.I like helping my m

27、other do the housework.=I like helping my mother with the housework.7.stand for=represent 代表(dibio);表示PRC stands for Peoples Republic of China.第35页/共67页第三十六页，共67页。8.in a flash=very quickly =in a very short time 一瞬间;很快A computer can do a calculation in a flash.电脑可以(ky)在一瞬间完成计算.9.Why not do sth.?=Why

28、dont you do sth.?第36页/共67页第三十七页，共67页。Why not see a film tonight?=Why dont you see a film tonight?10.buy sb.sth.=buy sth.for sb.My mother bought me a new bike last month.=My mother bought a new bike for me last month.第37页/共67页第三十八页，共67页。第38页/共67页第三十九页，共67页。I.Imperative sentences 祈使句祈使句 1 祈使句祈使句:表示请求表

29、示请求,命令命令,劝告劝告,祝愿或建议的句子祝愿或建议的句子.e.g.Close the window,please.e.g.Be quiet.2 使用祈使句应注意的几点使用祈使句应注意的几点.A:肯定祈使句的谓语总是用动词肯定祈使句的谓语总是用动词(dngc)原形原形.Be careful.小心小心 Have a good time.愿你玩得开心愿你玩得开心.第39页/共67页第四十页，共67页。B:否定否定(fudng)祈使句祈使句.祈使句否定祈使句否定(fudng)式的构成方法是在动词原形前加式的构成方法是在动词原形前加dontDont laugh.不要笑不要笑.Dont be late

30、 again.不要再迟到了不要再迟到了.C:与与please连用连用.可用于句首或句末可用于句首或句末.Sit down,please.请坐请坐.Please dont get angry.请不要请不要(byo)生气生气.第40页/共67页第四十一页，共67页。D:以以let开头的祈使句开头的祈使句.Let me help you.让我帮助你让我帮助你.Lets go to the cinema.我们我们(w men)一起去电影院一起去电影院.这类祈使句的否定式的形式如下这类祈使句的否定式的形式如下:Lets not hurry.let后的动词要用原形后的动词要用原形.第41页/共67页第四十

31、二页，共67页。II.加减乘除加减乘除(ji jin chng ch)表示法表示法1.“加加”用用plus，and或或add表示表示(biosh)；“等于等于”用用is,equal等词表示等词表示(biosh)。2+3=?可表示可表示(biosh)为：为：How much is two plus three?2+3=5 Two plus three is five Two and three is equal to five Two and three is five Two added to three is five 第42页/共67页第四十三页，共67页。加减乘除加减乘除(ji jin

32、chng ch)表示法表示法2.“减减”用用 minus或或 subtract表示表示(biosh)106?How much is ten minus six?10-6=4 Ten minus six is four Subtract six from ten,and we get four.第43页/共67页第四十四页，共67页。3.“乘乘”用用times或或multiply表示表示(biosh)3X4?How much is three times four?3X4=12 Three times four is twelveMultiply three by four，we get twe

33、lve Three multiplied by four is twelve 第44页/共67页第四十五页，共67页。4.“除除”用用divide的过去分词形式的过去分词形式(xngsh)表示表示164=?How much is sixteen divided by four?1644 Sixteen divided by four is four Divide sixteen by four,and we get four.第45页/共67页第四十六页，共67页。有关有关(yugun)数字的命令和数字的命令和陈述陈述n n数字数字(shz)(shz)命令命令n n Add Add 甲甲 an

34、d (and (toto)乙乙 甲甲+乙乙 n nSubtract Subtract 甲甲 from from 乙乙 乙乙-甲甲 n nMultiply Multiply 甲甲 by by 乙乙 甲甲 乙乙 n nDivide Divide 甲甲 by by 乙乙 甲甲 乙乙Add 3 and(to)9Subtract 3 from 9 Multiply 3 by 9 Divide 9 by 3 3+9 9-3 39 93 第46页/共67页第四十七页，共67页。n n数字(shz)的陈述n n n n 甲Plus乙is/equals 丙 甲+乙=丙n n 甲minus乙is/equals丙甲

35、-乙=丙n n 甲 times乙 is/equals丙 甲乙=丙n n 甲 divided by乙 is/equals 丙 甲乙=丙n n 3 plus 9 is/equals 12 3+9=12n n 9 minus 3 is/equals 3 9-3=6n n 3 times 9 is/equals 27 3 9=27n n 9 divided by 3 is/equals 12 9 3=6第47页/共67页第四十八页，共67页。n n练习数字练习数字(shz)命令法命令法n nA _ 2 _ 10n nS _ 4 _ 5n nM _ 3 _ 7n nD _ 6 _ 2n n用数字用数字(

36、shz)陈述法转换数字陈述法转换数字(shz)命令法命令法n n_ p_ _ is/equals 12n n_ m _ _ is/equals 1n n_ t_ _ is/equals 21n n_ d _ by _ is/equals 3ddandubtractfromultiplybyivideby2lus105inus43imes76ivided2第48页/共67页第四十九页，共67页。III.III.基数词和序数词基数词和序数词基数词和序数词基数词和序数词基数词:表示人或事物的数量 Eg.One,Two 13-19都是以 teen结尾(jiwi)表几十几时，在十位数和个位数之间添加连字

37、符“-”E.g.twenty-one 21 表几百时，百位数与十位数或者百位数与个位数之间加and.three hundred and twenty 320 One hundred and one 101 第49页/共67页第五十页，共67页。基数词表示确切整数时，hundred/thousand后不加s E.g.200 two hundred 当基数词表示不确定数字，如 数十个的成百的，成千上万(chng qin shng wn)基数词以复数形式出现如：tens of 数十个的 hundreds of 数百个的 数千个的数千个的数百万个的数百万个的Thousands ofMillions o

38、f 第50页/共67页第五十一页，共67页。序数词：表示人或事物的顺序序数词：表示人或事物的顺序 first/second/third 序数词变化规律序数词变化规律 序数词是在基数词的基础上变化而成的序数词是在基数词的基础上变化而成的多数序数词在基数词的基础上加多数序数词在基数词的基础上加 t h four fourth seven seventh第第1,第第2,第第3要注意要注意(zh y)one first two second three third 8要减要减t,9要减要减e再加再加thE.g.eight eighth nine ninth基数词以基数词以 ve结尾，变结尾，变 ve

39、为为f再加再加 ththirty thirtieth five fifth第51页/共67页第五十二页，共67页。IV.小数(xiosh)表示法读法读法小数点的左边按基数词读（当小数点左边为零小数点的左边按基数词读（当小数点左边为零时，零可省略时，零可省略(shngl)不读），小数点读不读），小数点读point，小数点右侧各数位单独朗读，小数点右侧各数位单独朗读0.5 zero point five(point five)72.78 1.345 seventy-two point seven eightone point three four five 当小数数值大于1时，小数后的名词用复数(

40、fsh)；当小数数字小于1时，小数后面的名词用单数 1.5吨 one point five tons 0.49吨 zero point four nine ton 第52页/共67页第五十三页，共67页。第53页/共67页第五十四页，共67页。Now try a quiz about numbers.Listen to the instructions on the recording,and circle the right answer.1 1 80 80 49 49 17172 2 2.66 2.66 26%26%2/62/63 3$75$75 75%75%7575o o4 41/8 1

41、/8 0.75 0.75 33335 5 56 56 65 65 66666 69090o o 90%90%1/9 1/97 2565 3881 7 2565 3881 2566 28812566 2881 2565 2881 2565 28818 1.8%8 1.8%80%80%18%18%9$5,000 9$5,000$50,000$50,000$50,000,000$50,000,00010 30.510 30.5o o 13.513.5o o 35 35o o 第54页/共67页第五十五页，共67页。1 Which one of these is an even number?2 Wh

42、ich one of these is a fraction?3 Which one of these is a percentage?4 Which one of these is a decimal number?5 Which one of these is an odd number?第55页/共67页第五十六页，共67页。6 Which one of these is a number showing degrees?7 My phone number is 2565 2881.8 18 per cent of my classmates come to school on foot

43、.9 This ring costs fifty thousand dollars.10 The highest temperature today was 30 point 5 degrees.第56页/共67页第五十七页，共67页。第57页/共67页第五十八页，共67页。第58页/共67页第五十九页，共67页。第59页/共67页第六十页，共67页。第60页/共67页第六十一页，共67页。第61页/共67页第六十二页，共67页。以以说说事事为为主主的的文文章章属属于于说说明明文文，说说明明文文主主要要包包括括地地点点介介绍绍、人人物物介介绍绍、知知识识简简介介、图图片片说说明明、图表说明、旅

44、游安排等。图表说明、旅游安排等。说说明明文文主主要要以以描描述述为为表表达达方方式式，来来说说明明某某个个事事物物的的类类别别(libi)、性性质质、特特征征、状状态态或或形形成成的的原原因因、发生发展的过程等等。发生发展的过程等等。写写说说明明文文应应注注重重客客观观事事实实，用用事事实实说说话话，抓抓住住事事物物的的特特征征，把把地地点点、事事物物和和事事理理解解释释清清楚楚，语语言简明扼要。言简明扼要。第62页/共67页第六十三页，共67页。Traffic accidents May asked Officer Chen about traffic accidents.Then she

45、drew a line graph.Read the conversation and write the figures on the graph.第63页/共67页第六十四页，共67页。3,7293,6443,7483,639第64页/共67页第六十五页，共67页。1 Use the verbs be,rise and fall in the simple past tense.2 Write the years and numbers of accidents in figures,not in words.B After drawing her graph,May wrote a pa

46、ragraph about it.Part of the paragraph is given here.Complete it,following these instructions:The graph shows that there _ 3,691 accidents in 2001 in our city.In _,the number _ to _and _to _in _.In _,the number _ again to _.It _to _in _.Traffic accidents 2001-2005were 2002 rose 3,748 fell 3,644 2003 2004 rose 3,729 fell 3,639 2005第65页/共67页第六十六页，共67页。要点齐全要点齐全(qqun)，意思连贯，符合逻，意思连贯，符合逻辑，无语法错误。辑，无语法错误。开头（开头（1分）分）结尾（结尾（1分）分）内容内容(nirng)要点（要点（6分）分）时态（时态（1分）分）字数（字数（1分）分）4个错误（扣个错误（扣 1分）分）评分标准评分标准第66页/共67页第六十七页，共67页。