广东省深圳市宝安区上寮学校七年级英语上册《Chapter4 The world of numbers Reading》课件 牛津版.pptVIP

chapter4 theworldofnumbers plus add subtract minus divide multiply equals oddnumbers evennumbers abacuses anoldkindofcalculatingmachine calculators electroniccalculators computers akindofcalculatingmachine reading awhatdoyouknowabout weallusenumbersinourdailylife numbersareaninternationallanguage blookandthink beforeyoureadthearticleonthenextpage lookatitstitle theheadingsandthepictures whatdoesthearticletellyou tickthethingsonthelistbelow listenandaskthequestionsinthearticle whatisit 2 writethenumberinfiguresandtheninwords 3 whatistheanswer thebiggestnumberis9 876 543 210 thenumberontheabacusis2 597 twothousand fivehundredandninety seven itis1aftercalculation 1longago thereweredifferentwaysofwritingnumbers 2theegyptiansfirstinventedthe1to9systemofnumbers 3thezeroisnotanumber 4thezeroisanespeciallyimportantnumber 5machinesmakeiteasierforustocalculate 6yourbrainisanimportantpartofyourbody vocabulary writeoutthewords 1 i a makeforthefirsttime2 i b order3 a c withnomistakes4 a d veryold5 s fore mean standfor6 c off bemadeupof7 p g verystrong8 d h becomebetter9 a i anoldkindcalculatingmachine10 e j usingelectronsforpower invent instruct accurate ancient stand consist powerful abacus develop electronic pre activity sayoutthenumbersasrequired evennumbersoddnumberspercentagesnumbersshowingdegreesdecimalnumbers workinpairs onestudentgivesorders andtheothersaysoutthenumbersrequired evennumbers oddnumbers fractions percentages numbersshowingdegrees decimalnumbers task1 classifythesenumbers 0 5450 21342040 3 5794025 3 7171 00076 75 8527 721 13160 7 957 22276 5200532 5 166150236 0 755 0541 27 20061 53 5 onehundredandsixtysix onethousand fivehundredandtwo thirtysixpercent zeropointsevenfive fivepointofive fortyonedegrees twentysevendegrees twothousandandsix twooosix task2 sayoutthefolowingnumbers one fifth three fifths 房号 1103 room1103班级 年级 class6 grade9 formthree时间 6 50 sixfifty tentoseven年 月 日 1986 12 6 decemberthesixth nineteeneighty six温度 36 c thirty sixcelsiusdegrees序数 12th twelfth14th fourteenth differentexpressionsaboutnumbers cfindthemeanings c1findthesewordsinthearticleonpage45 readthewordsroundthemandchoosethebestmeanings 1ancientamany manyyearsagobmany manymilesaway 2consistsofalearnstowritebincludes3inventedadidnotlikebmadeforthefirsttime4accurateawithoutmistakesbeasytocarry5percentagesaamountsoutofahundredbamountsofmoney c2findthewordsincolumnainthearticleandmatchthemwiththemeaningsincolumnb internationala grewbiggerorstrongersystemb agroupofthingsworkingtogetherdevelopedc countwithnumbers4 calculated strong5 bottome usedbymorethanonecountryornation6 powerfulf inthelowestplace a b an a a abacus calculator computer c3whatdothefollowingdescriptionsreferto writedownthecorrectnamesintheblanks li everyoneknowsit may knowswhat li thelanguageofnumbers li li li li li li numbers intens 1to9 calculatingmachines zero abacuses dfindthefacts 1在古代2以许多不同方式由 组成从 到 数字系统帮助某人做计算机器代表 象征在算盘上从 开始 inancienttimesinmanydifferentwaysconsistoffrom to systemofnumbershelpsb to dosthcalculatingmachinesstandforontheabacusstart beginfrom 词组翻译 11写下12用