八年级英语上册 Module 2 Amazing things Unit 4 Numbers Reading教学课件 （新版）牛津上海版.ppt

2 4 amazingthings numbers reading 1 2 2 1 puzzletime inthesetwopictures grandadishelpingbillywithhishomework billyisusingacalculatorandgrandadisusinganabacus mumanddadarewatching canyoufind15differencesbetweenthepictures sayandwriteasentenceabouteachofthedifferences 2 2 1 2 a b example inpictureatherearefoursweets butinpicturebtherearefivesweets 1 2 8 1 whatdoyouknowabout a1wearegoingtoreadaboutaninternationallanguage numbers doyourememberwhat international means 3 4 5 internationalbetweendifferentnationsorcountries 6 7 8 a2doyouknowwhat language means 8 2 1 2 3 4 5 language n wordsthatacertaingroupofpeoplesayandwrite l w doyouknowanyinternationallanguages 6 7 8 a3theworddigithastwomeanings anumber 1 2 3 etc andafinger thewordscalculatorandcalculatecamefromawordthatmeantastone guesstheconnectionsbetweennumberandfingerandbetweenstoneandcalculator 8 3 1 2 3 4 5 beforenumberswereinvented peoplecountedwiththeirfingersorwithstones digit 10 10 6 7 8 8 4 1 2 3 4 5 calculate v findtheanswerbyusingmaths k lkjule t canyoucalculatehowmuchtheholidaywillcost calculator n anelectronicmachinethatadds subtracts multipliesanddivides k lkjule t r add subtract multiply divide s b tr kt m lt pla d va d 6 7 8 8 5 1 2 3 4 5 a4canyougivethelargestnumberthatexists infact thereisn tone everynumbercanalwaysbemadebiggerbyadding1toit a5thinkofthejobsthatusenumbersalotandthejobsthatdonotusenumbersoften 6 7 8 8 6 1 2 3 4 5 b1useyourdictionarytolookupthesewordsandphrases 6 7 8 8 7 1 2 3 4 5 b2weallusenumbersinourdailylife numbersareaninternationallanguage whatdoyouknowaboutthelanguageofnumbers trythisquiz matchthewordswiththesignsandnumbers 6 7 8 1adecimalnumber7add plus2equals8subtract minus3apairofoddnumbers9multiply4apairofevennumbers10divide5afraction11anumbershowingdegrees6zero12apercentage 8 8 1 2 3 4 5 1 2 3 4 5 6 7 8 9 10 11 12 d ri p sent 6 7 8 1 2 3 1 beforeyouread abeforeyoureadthepassage lookatthefollowingpicturesfirst putthemintheorderofthehistoryofnumbers thenlookattheheadingsonpage57andcheckyouranswers 3 0 3 2 1 2 3 thishistoryofnumbers 0 ancientnumbers zero calculatingmachines brainagainstcomputer bnow lookatthetitle theintroduction theheadingsandthepictures thenonthelistbelow tick thethingsyouthinkthearticlemaytellyou 3 3 1 2 3 longago thereweredifferentwaysofwritingnumbers zeroisnotanumber zeroisanespeciallyimportantnumber machinesmakeiteasierforustocalculate yourbrainmaycalculatebetterthanacomputer yourbrainisanimportantpartofyourbody whileyouread 16 1 1 2 3 4 5 a1readthewholepassageonpage57forthefirsttime findthefollowingwordsorphrasesinthepassage workouttheirmeaningsbyyourself 6 7 8 9 10 11 12 13 14 15 16 16 2 a2choosetherightmeaningsforthesewords nearlyamostbalmostinventedadidnotlikebmadeforthefirsttimeaccurateacorrectbeasy 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 16 3 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 inaflashainalongtimebinashorttimelifetimeatimethatsomebodyworksbtimethatsomebodyliveslikelightningaveryquicklybveryslowly 18 4 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 a3matchthewordsincolumnawiththemeaningsincolumnb 16 5 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 a4writethewordsthatgowiththedescriptions 1 anancientcalculatingmachinethatisstillusetoday 2 alivingcomputer 3 asmallmachinethatuseselectronicpowertodocalculations 4 averypowerfulmachinefordoingcalculations an the a a abacus brain calculator computer 16 6 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 breadthepassage howmanylanguagesdoyouknow everyoneknowsatleasttwo hisorherownlanguageandtheinternationallanguageofnumbers 16 7 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 inancienttimes peoplewrotenumbersinmanydifferentways asthesepicturesofthenumber6show however theynearlyallcountedinthesameway intens ancientnumbers 16 8 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 zero mostofususethesystemofnumberswithnumbersfrom1to9and0 zero withthesetennumbers wecanwriteanynumberfromthebiggesttothesmallest theindiansfirstinventedanddevelopedthe1to9systemofnumbers theytheninventedthezero thiswasaveryimportantinventionbecauseitmadeiteasiertowritebignumbersandtocalculate 16 9 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 calculatingmachines oneofthefirstcalculatingmachineswasanabacus abacusesaresofastandaccuratethatpeoplestillusethemtoday amodernelectroniccalculatorcanadd subtract multiplyanddivide itcanalsocalculatepercentagesandsquareroots computersareverypowerfulcalculatingmachines inaflash acomputercandoacalculationthatyoucouldnotdoinyourwholelifetime findthenumberthat whenitismultiplied23timesbyitself givesthisanswer 916748676920039158098660927585380162483106680144308622407126516427934657040867096593279205767480806790022783016354924852380335745316935111903596577547340075681688305620821016129132845546805780158806771 16 10 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 brainagainstcomputer somepeoplecallthebrainalivingcomputer isahumanbrainamorepowerfulcalculatorthanacomputer thefollowingstorymaygiveananswer shakuntaladeviisaladyfromindiawithanamazingbrain shakuntalaandaverypowerfulcomputerweregiventhisproblemtosolve 16 11 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 shakuntala sbraintookfiftysecondstofindtheanswer likelightning thecomputertookaminute however someonehadtofirstprogramthecomputerwithinstructions andthattookmanyhours noonehadtoprogramshakuntala useyourownlivingcomputertosolvetheproblemabove ifitisnotpowerfulenough youwillfindtheansweronpage67 answer 546 372 891 passage 16 12 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 cmayisaskingmrli thewriter somequestionsabouthisarticleonnumbers hisanswersarenotquiteclear readthearticleagainandmakehisanswersclearer thefirstonehasbeendoneforyou 18 13 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 language numbers numbers intens zero abacuses calculatingmachines humanbrain computer 16 14 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 dcompleteanswerstothesequestionsaboutmrli sarticle workaloneorinpairs 16 15 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 canyouexplainwhywecountintens wecountintensbecausewehave fingers whichdidtheindiansinventfirst the1to9numbersystemorthezero theyinventedthe first ten 1to9numbersystem 16 16 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 canyoucompletethissentencewiththreewordstotellusthatacomputerworksveryfast acomputercandoacalculation canyouusetwowordstotellusthatshakuntala sbrainworksveryfast itcandoacalculation isahumanbrainamorepowerfulcalculatorthanacomputer why inaflash likelightning youcanwriteyourownanswerhere afteryouread 3 1 aworkinpairs askandanswerquestionaboutmrli sarticleonnum