Unit4Numbers.ppt

Howmanycandiesarethereinmybox?,Oct.31,ListeningandSpeaking,Theoilcostsninety-eightpointeightyuan.,Wherecanweseenumbersineverydaylife?,98.8,point,Yourtemperatureisthirty-sevencentigrade(摄氏)degree（度）.,37,centigradedegree,Myhomenumberistwofivesixonesixeightnineseven.,25616897,Itsninepasttennow.,50%,Thediscount(折扣)isfiftypercent.,ahalf,WordCompetition单词竞猜,even,百分数,degree,分数,odd,小数的,度数,percentage,奇数的,偶数的,decimal,fraction,Whichoneoftheseis.?,1.,4.,anevennumber,apercentage,anumbershowingdegree,anoddnumber,adecimalnumber,afraction,ANowtryaquizaboutnumbers.Listenanddrawacircleroundtherightanswer.,A.80B.49C.17A.2.66B.26%C.2/6A.75B.75%C.75A.1/8B.0.75C.33A.56B.65C.66A.90B.90%C.1/9A.25653881B.25662881C.25652881A.1.8%B.80%C.18%A.$5,000B.$50,000C.$15,000A.30.5B.13.5C.35,Couldyouhelphim?,OneofMr.LisfriendsinShanghaiwillhaveabirthdayparty.Mr.Liwantstobuyapresentandgoestomeethimbyplane.Buthecomesacross(遇到)fourmathematicaldifficulties（数学难题）onthewaytohisfriendshouse.,Calculations,IntheShoppingMall,Mr.Liwantstobuyabookandapen.Thebookcosts58yuan,andthepencosts30yuan.Hegivestheseller100yuan.Whatisthechange(找零)?,A.100-(58+30)=12B.100+58+30=188C.100-58+30=72,Formulas(算式):,Goingtotheairport,Theflight（航班）forshanghaiwillleavein30minutes,andits7:58(twotoeight)now.Whenwilltheplaneleave?,A.7:58-30=7:28B.7:58+30=8:28C.7:58+30=7:88,Formulas(算式):,Ontheplane,ThereisagirlsittingnexttoMr.Liontheplane.Mr.Liis178cmtall.AndthegirltellsMr.Lithatheis40cmtallerthanher.Thenhowtallisthegirl?,A.178+40=218B.178-40=138,Formulas(算式):,Infriendshouse,Thereare12piecesofcakesinMr.Lishouse.Theyshouldbedividedamong2kids（小孩）and4otherpeople.Thenhowmanypiecesofcakeseachpersoncanget?,122+4=10B.12(2+4)=2C.12(2+4)=2,Formulas(算式):,Blistentotheconversations(对话)andwritedowntheformulas(算式)andanswersbelowthepictures.,1.,2.,3.,4.,5.,6.,0.53+2=3.5,6:58+30=7:28,163+12=175,124=3,84=32,50-23=27,1.,0.53+2=3.5,1GIRLIdliketobuythreepencilsandoneballpointpen（圆珠笔）.Howmucharethey?WOMAN0.5yuanforonepenciland2yuanforoneballpointpen.QUESTIONHowmuchshouldthegirlpay?,2.,50-23=27,2WOMANHereis50yuan.MANThatstwentythreeyuanforthebook,andhereisyourchange(找零).QUESTIONWhatisthechange?,3.,84=32,3GIRLHowmanypiecesofchocolatearethereinthebox?WOMANEight.GIRLIdliketotakefourboxes.QUESTIONHowmanypiecesofchocolatedoesthegirlwanttobuy?,4.,163+12=175,4BOYHowtallareyou?GIRLIam163cmtall.BOYWell,Iam12cmtallerthanyou.QUESTIONHowtallistheboy?,5.,6:58+30=7:28,5WOMANTheflight(航班)forBeijingwillleavein30minutes.MANWhatsthetimenow?WOMANItstwotoseven(6:58).QUESTIONWhenwilltheplaneleave?,6.,124=3,6MUMIboughttwelveapples.DADWell,dividethemamongthefourkids(小孩).QUESTIONHowmanyapplesdoeseachkidget?,Thereisanewgrocery(杂货店)openednearourschool.Youwanttohavealookandbuysomething.Pleaseworkinpairsandmakeadialogue.,A:CanIhelpyou?B:Yes,Idliketobuy2notebooks.A:1.5yuanforone.B:Sotheycost3yuan.Hereis5yuan.A:Thankyou,andhereis2yuanforthechange.,Forexample:,Pairwork,A:CanIhelpyou?B:Yes,Idliketobuy2notebooks.A:1.5yuanforone.B:Sotheycost3yuan.Hereis5yuan.A:Thankyou,andhereis2yuanforthechange.,Forexample:,anotebook:￥1.5,apen:￥10.5,arubber:￥1.5,acandy:￥2,aballpointpen:￥8,abirthdaycard:￥3,Geniusis1%inspirationand99%perspiration.ThomasEdison,Amanislikeafractionwhosenumerator(分子)iswhatheisandwhosedenominator(分母)iswhathethinksofhimself.Thelargerthedenominator,thesmallerthefraction.LeoTolstoy,天才等于1%的智慧和99%的汗水。爱迪生,一个人就像一个分数，他的实际才能好比分子，而他对