滬教版(初中二年級(jí))八年級(jí)英語(yǔ)第一學(xué)期(試用本)：Numbers課件

NumbersNumbers

AncientnumbersGreekEgyptian(希臘的;希臘人;希臘語(yǔ))(埃及的;埃及人)AncientnumbersGreekEgyptianRomanⅠ=1Ⅴ=5Ⅹ=10L=50C=100D=500M=1000III=3，Ⅳ=4，Ⅵ=6，ⅩⅨ=19，ⅩⅩ=20，ⅩLⅤ=MCMⅩⅩC=198045RomanⅠ=1Ⅴ=5Ⅹ=10L=5Chinese壹貳叁肆伍陸柒捌玖拾佰仟萬(wàn)Chinese壹貳叁肆伍陸柒捌玖拾佰0Whoinventedthesenumbers?23456789

Whoinvented“zero”?Whywasitaveryimportantinvention?Indian

ArabiannumberItmadeiteasiertowritebignumbersandtocalculate.0Whoinventedthesenumbers?30%apercentagen.百分?jǐn)?shù),百分比60oanumbershowingdegreesn.度數(shù),度,aprotractorapairofcompasses√

56squareroot平方根30%apercentagen.百分?jǐn)?shù),百分比60oaWhatarethese?adecimalnumberadj.小數(shù)的,n.小數(shù)0.824apairofoddnumberadj.奇數(shù)的,單數(shù)的,不成對(duì)的,5189afraction

n.分?jǐn)?shù)56apairofevennumberadj.偶數(shù)的32158Whatarethese?adecimalnumb+add;plus-subtract,minusxmultiply,times÷

divide=equalsSigns+add;plus-subtract,minusxmCalculatingmachinesanabacusbeadoneofthefirstcalculatingmachinesfastandaccurateusedtodayCalculatingmachinesanabacusbelectroniccalculatoramoderncalculatingmachinecanadd,subtract,multiplyanddividecancalculatepercentagesandsquarerootsWhydoyouoftenuseit?electroniccalculatoramoderncomputeraverypowerfulcalculatingmachinecandoacalculationthatyoucouldnotdoinyourwholelifetimebrainlivingcomputerWhichismorepowerful?computeraverypowerfulcalculShakuntalaDevi7686369774870×2465099745779=?1894766817799542646277373028secondsHowlongdidittakehertoworkoutthisproblem?anIndianladyShakuntalaDevi76863697748916748676920039158098660927585380162483106680144308622407126516427934657040867096593279205767480806790022783016354924852380335745316935111903596577547340075681688305620821016129132845546805780158806771Howlongdidittaketosolvethisproblem?a=23a=?ShakuntalaDevi:secondsComputer:seconds546,372,8915060likelightinginaflash9167486769200391580986609275851.Saysomethingaboutnumbers.2.Thedevelopmentofcalculatingmachines.FreeTalk1.Saysomethingaboutnumbers+add;plus-18+26=44subtract,minus87-24=63=equalsA:

Add18and26B:18plus26is/equals44A:

Subtract24from87B:

87minus24is/equals6360+34=9435–20=15Pairwork+add;plus-18+26=44subtraxmultiply,times40x5=200÷

divide90÷30=3A:Multiply40by5B:40multipliedby5is200A:Divide90by30.B:90dividedby30equals320x5=10080÷16=5PairworkB1xmultiply,times40x5=200÷Whatisit?A:Thinkofanumber.Butdon’ttellmewhatitis.Add1.Multiplytheanswerby2.Nowadd3.Nowmultiplyby2again.Nowsubtract10.Nowtellmetheanswer.B:A:Workinpair4812Whatisit?A:Thinkofanumbe2abciiiiii4589316

72abciiiiii45893167Readthesenumbers1mile=1.609kmonepointsixonine40%ofourclassmatesaregirls.56ofthestudentsgettoschoolonfoot.fortypercentfivesixthsHistelephonenumberis86765434.IwasbornonJanuary18,1967.TheChangjiangRiveris6,378kilometerslong.Readthesenumbers1mile=1.632,805,041

thirty-twomillioneightyhundredandfivethousandandforty-one1,306,313,812

onebillionthreehundredandsixmillionthreehundredandthirteenthousandeighthundredandtwelveSaythesecardinalnumbers1950onethousandninehundredandfiftyoneninefivezeronineteenfifty32,805,041

thirty-twomillion1.72+272.105-223.10,000x364.1,440÷125.0.92x18.186.0.504÷0.12____________________________________________________________________________________1.72+2722.150-223.10,000x3.64.1,440÷1205.0.92x18.166.0.504÷1.12Workinpair1.72+27￥35，000FellowstudentsMrTanghasgivenourschoolagiftof￥35,000.Ourgroupthinksweshouldbuythesethreethings.First__________________.Thiswillcostabout￥________Second,__________________________________.Thiswillcostabout￥__________.Third,____________________________________________________Thiswillcostabout￥________.Haveyougotanyquestions?Weshouldbuynewequipmentforgym5,000Wewouldliketobuysomemorebooks

forthelibrary.

10,000Weshouldbuysomecomputers

20,000￥35，000Fellowstudentsatrafficaccidentatrafficaccident3,7483,6443,7293,639Thegraphshowsthatthere___________________________in1996inourcity.In______,thenumber_____to________and_____to_________in________.In_______thenumber________againto_______.It____to________in_________were3,691trafficaccidents1997rose3,748fell3,64419981999rose3,729fell3,6392,000Trafficaccidents1996-2000riserosefallfell3,7483,6443,7293,639ThegraphFahrenheit華倫海特

AndersCelsius攝爾西烏斯

25Ctwenty-fivedegreesCelsiuso77Fseventy-sevendegreesFahrenheitoFahrenheit華倫海特AndersCels18世紀(jì)初德國(guó)儀器制造家華倫海特發(fā)明了一個(gè)玻璃水銀柱溫度計(jì)，柱上刻有度數(shù)，當(dāng)水銀因熱而膨脹時(shí)，可以讀出柱高的增加數(shù)。華倫海特用冰與食鹽的混合物所能得出的最低溫度作為他的刻度的零度。按他的刻度，水的水的結(jié)冰讀數(shù)為32°，水的沸騰讀數(shù)為212°，兩者距離為180°。這種刻度很快得到普遍應(yīng)用，特別是在氣象工作方面，因其刻度細(xì)，有利于氣象測(cè)量。1730年法國(guó)博物學(xué)家列奧米爾建議把結(jié)冰與沸騰之間的距離分成80°，這就是列氏溫標(biāo)。不久以后瑞典天文學(xué)家攝爾西烏斯提議把兩者中間的距離分成100°。18世紀(jì)末法國(guó)國(guó)民公會(huì)采用攝氏刻度作為公制的一部分，現(xiàn)在大多數(shù)國(guó)家都使用這種刻度的溫度計(jì)。18世紀(jì)初德國(guó)儀器制造家華倫海特發(fā)明了一個(gè)玻璃水銀柱溫度計(jì)，30o60o90othirtydegreessixtydegreesninetydegrees30o60o90othirtydegreessixtyd1.WilburandOrvilleWright,WilburwasbornonApril16,1867andOrvillewasbornonAugust19,1871.

2.Ourschoolwasbuiltin1987.

3.ChangjiangRiver,6,378km4.TheHimalayasinTibet,China.MountQomolangma8,844.43metershigh.5.1991,aboutthreeyears.6.1,306,000,000.550,000,0007.400,000m2140,000m2(squaremeters)8.1,462km(bytrain)/1,300km15hoursbytrain.Oneandahalfhoursbyplane.9.5oCinwinter,26oCinsummeranswers1.WilburandOrvilleWright,NumbersNumbers

AncientnumbersGreekEgyptian(希臘的;希臘人;希臘語(yǔ))(埃及的;埃及人)AncientnumbersGreekEgyptianRomanⅠ=1Ⅴ=5Ⅹ=10L=50C=100D=500M=1000III=3，Ⅳ=4，Ⅵ=6，ⅩⅨ=19，ⅩⅩ=20，ⅩLⅤ=MCMⅩⅩC=198045RomanⅠ=1Ⅴ=5Ⅹ=10L=5Chinese壹貳叁肆伍陸柒捌玖拾佰仟萬(wàn)Chinese壹貳叁肆伍陸柒捌玖拾佰0Whoinventedthesenumbers?23456789

Whoinvented“zero”?Whywasitaveryimportantinvention?Indian

ArabiannumberItmadeiteasiertowritebignumbersandtocalculate.0Whoinventedthesenumbers?30%apercentagen.百分?jǐn)?shù),百分比60oanumbershowingdegreesn.度數(shù),度,aprotractorapairofcompasses√

56squareroot平方根30%apercentagen.百分?jǐn)?shù),百分比60oaWhatarethese?adecimalnumberadj.小數(shù)的,n.小數(shù)0.824apairofoddnumberadj.奇數(shù)的,單數(shù)的,不成對(duì)的,5189afraction

n.分?jǐn)?shù)56apairofevennumberadj.偶數(shù)的32158Whatarethese?adecimalnumb+add;plus-subtract,minusxmultiply,times÷

divide=equalsSigns+add;plus-subtract,minusxmCalculatingmachinesanabacusbeadoneofthefirstcalculatingmachinesfastandaccurateusedtodayCalculatingmachinesanabacusbelectroniccalculatoramoderncalculatingmachinecanadd,subtract,multiplyanddividecancalculatepercentagesandsquarerootsWhydoyouoftenuseit?electroniccalculatoramoderncomputeraverypowerfulcalculatingmachinecandoacalculationthatyoucouldnotdoinyourwholelifetimebrainlivingcomputerWhichismorepowerful?computeraverypowerfulcalculShakuntalaDevi7686369774870×2465099745779=?1894766817799542646277373028secondsHowlongdidittakehertoworkoutthisproblem?anIndianladyShakuntalaDevi76863697748916748676920039158098660927585380162483106680144308622407126516427934657040867096593279205767480806790022783016354924852380335745316935111903596577547340075681688305620821016129132845546805780158806771Howlongdidittaketosolvethisproblem?a=23a=?ShakuntalaDevi:secondsComputer:seconds546,372,8915060likelightinginaflash9167486769200391580986609275851.Saysomethingaboutnumbers.2.Thedevelopmentofcalculatingmachines.FreeTalk1.Saysomethingaboutnumbers+add;plus-18+26=44subtract,minus87-24=63=equalsA:

Add18and26B:18plus26is/equals44A:

Subtract24from87B:

87minus24is/equals6360+34=9435–20=15Pairwork+add;plus-18+26=44subtraxmultiply,times40x5=200÷

divide90÷30=3A:Multiply40by5B:40multipliedby5is200A:Divide90by30.B:90dividedby30equals320x5=10080÷16=5PairworkB1xmultiply,times40x5=200÷Whatisit?A:Thinkofanumber.Butdon’ttellmewhatitis.Add1.Multiplytheanswerby2.Nowadd3.Nowmultiplyby2again.Nowsubtract10.Nowtellmetheanswer.B:A:Workinpair4812Whatisit?A:Thinkofanumbe2abciiiiii4589316

72abciiiiii45893167Readthesenumbers1mile=1.609kmonepointsixonine40%ofourclassmatesaregirls.56ofthestudentsgettoschoolonfoot.fortypercentfivesixthsHistelephonenumberis86765434.IwasbornonJanuary18,1967.TheChangjiangRiveris6,378kilometerslong.Readthesenumbers1mile=1.632,805,041

thirty-twomillioneightyhundredandfivethousandandforty-one1,306,313,812

onebillionthreehundredandsixmillionthreehundredandthirteenthousandeighthundredandtwelveSaythesecardinalnumbers1950onethousandninehundredandfiftyoneninefivezeronineteenfifty32,805,041

thirty-twomillion1.72+272.105-223.10,000x364.1,440÷125.0.92x18.186.0.504÷0.12____________________________________________________________________________________1.72+2722.150-223.10,000x3.64.1,440÷1205.0.92x18.166.0.504÷1.12Workinpair1.72+27￥35，000FellowstudentsMrTanghasgivenourschoolagiftof￥35,000.Ourgroupthinksweshouldbuythesethreethings.First__________________.Thiswillcostabout￥________Second,__________________________________.Thiswillcostabout￥__________.Third,____________________________________________________Thiswillcostabout￥________.Haveyougotanyquestions?Weshouldbuynewequipmentforgym5,000Wewouldliketobuysomemorebooks

forthelibrary.

10,000Weshouldbuysomecomputers

20,000￥35，000Fellowstudentsatrafficaccidentatrafficaccident3,7483,6443,7293,639Thegraphshowsthatthere___________________________in1996inourcity.In______,thenumber_____to________and_____to_________in________.In_______thenumber________againto______