六年级数学下册《百分数的应用》提高题

校长为学校学生道路交通安全工作第一责任人，负责校（园）内的道路交通安全管理工作和学生出行的道路交通安全教育，以及学生春(秋)游和其他教育教学活动的道路交通安全管理工作centerpinchecksandanchoringtheinnercylinder.AccordingtoWhilecouplingalignmentshouldkeepoiloutofcavityandlocatetherotoraxisneckraisedarewithintheprescribedlimits,thereshouldbenogaps,Horn,HornandHorn0.05mmfeelergaugesfitinto.Centercoupling,condenserwaterfillingandwater-filledaccordingtofactoryrequirement.ForcouplingthreesupportedrotorCenter,themouthunderthecouplingbetweenthevalueshouldbeasstipulatedinthemanufacturer,usually0.15~0.25mm.Inthecaseofcouplingconnection,ifpossible,liftingonlyonebearingendofthesupportbearingoftherotor,removethebearing,fittedwithspecialtilesandspecialliftingtools,discrotors,checkthejournalfluttertile,shouldgenerallybelessthan0.10MM.Whenthecouplingsandrotorcomeswhenthereisaconflict,thecouplingCentreshallprevail.6.4.5.2.2shaftlookingfor:...6.4.5.3.Provisionalboltconfirmedthepositioningoftherotorsize,aswellasthecouplingbetweentheadjustmentshimthicknessaccuracy,drawingstomeetthetechnicalrequirements.Plane,cylindricalandcleanthecouplingboltholesshouldbecleanandwithoutburrs,scrapironandgrease-free,relativepositionofthecouplingaccordingtothedrawingrequirementsare.Couplingtopscrews,rounddistanceapart,indicatorstomonitormovementoftheaircraft,itsvalueisallowedtopassthevalueaxismoving,mountedadjustmentpads,notepadsinstallationdirectionguidepincouplingwithprocessendclosed.Thebackwheelsslowlytightened,when2mmorso,withstandardwhitebarswheretwobackwheelboltholemeasurementaboveandbelow,confirmtwobackwheelboltholeconcentricity.Then,thesymmetricalhorizontalmounttwotemporaryboltstightened,attentiontomonitordialindicator,theninstallthesymmetricaltemporarybolts,thistimesitesslowlymovingrotor,inthemeasuredcircumferenceof8equalpartsbackwheelrimrock,eachmeasuringrelativechangesinvalueshouldbelessthan0.02mm.6.4.5.4couplingreamedandpairedboltreamingdiereamer,adjustablereamers,boringmill,inseveralways.6.4.5.4.1Generalrequirementsbeforereamingorboring,六年级数学下册《百分数的应用》提高题姓名______1、盒子中有45厘米3的水，结成冰后，冰的体积约为50厘米3.冰的体积比原来水的体积约增加了百分之几？2、某商店同时卖出两件商品，售价都是60元，已知其中一件赚了20%，另一件亏了20%，那么这个商店卖这两件商品是赚钱还是亏本？赚或亏了多少元？3、丰谷化肥厂生产一批化肥，计划用14天完成，由于改进了操作方法，提前4天完成了任务，求工作效率提高了百分之几？4、新华路中心小学六（2）班男生比女生多25%，则女生比男生少百分之几？5、一捆电线若干米，剪去它的50%又12米，再剪去剩下的50%又8米，最后剩下18米，这捆电线原来长多少米？6、甲车行完全程用6小时，乙车速度比甲车慢20%，乙车行完全程比甲车多用几小时？7、桔子比梨多20%，梨比桔子少百分之几？8、一种商品原来每件6800元，加价20%后又降价20%，现在每件多少元？9、王大伯养了500只鸡，第一次卖出40%，第二次卖出剩下的50%，第二次卖出多少只？10、新丰小学去年有女生200人，男生比女生多40%，今年女生比去年女生增加20%，而比今年男生多30人，今年男生人数比去年减少百分之几？11、将20%的盐水与5%的盐水混合，配成15%的盐水600克，需要20%的盐水和5%的盐水各多少克？校长为学校学生道路交通安全工作第一责任人，负责校（园）内的道路交通安全管理工作和学生出行的道路交通安全教育，以及学生春(秋)游和其他教育教学活动的道路交通安全管理工作centerpinchecksandanchoringtheinnercylinder.AccordingtoWhilecouplingalignmentshouldkeepoiloutofcavityandlocatetherotoraxisneckraisedarewithintheprescribedlimits,thereshouldbenogaps,Horn,HornandHorn0.05mmfeelergaugesfitinto.Centercoupling,condenserwaterfillingandwater-filledaccordingtofactoryrequirement.ForcouplingthreesupportedrotorCenter,themouthunderthecouplingbetweenthevalueshouldbeasstipulatedinthemanufacturer,usually0.15~0.25mm.Inthecaseofcouplingconnection,ifpossible,liftingonlyonebearingendofthesupportbearingoftherotor,removethebearing,fittedwithspecialtilesandspecialliftingtools,discrotors,checkthejournalfluttertile,shouldgenerallybelessthan0.10MM.Whenthecouplingsandrotorcomeswhenthereisaconflict,thecouplingCentreshallprevail.6.4.5.2.2shaftlookingfor:...6.4.5.3.Provisionalboltconfirmedthepositioningoftherotorsize,aswellasthecouplingbetweentheadjustmentshimthicknessaccuracy,drawingstomeetthetechnicalrequirements.Plane,cylindricalandcleanthecouplingboltholesshouldbecleanandwithoutburrs,scrapironandgrease-free,relativepositionofthecouplingaccordingtothedrawingrequirementsare.Couplingtopscrews,rounddistanceapart,indicatorstomonitormovementoftheaircraft,itsvalueisallowedtopassthevalueaxismoving,mountedadjustmentpads,notepadsinstallationdirectionguidepincouplingwithprocessendclosed.Thebackwheelsslowlytightened,when2mmorso,withstandardwhitebarswheretwobackwheelboltholemeasurementaboveandbelow,confirmtwobackwheelboltholeconcentricity.Then,thesymmetricalhorizontalmounttwotemporaryboltstightened,attentiontomonitordialindicator,theninstallthesymmetricaltemporarybolts,thistimesitesslowlymovingrotor,inthemeasuredcircumferenceof8equalpartsbackwheelrimrock,eachmeasuringrelativechangesinvalueshouldbelessthan0.02mm.6.4.5.4couplingreamedandpairedboltreamingdiereamer,adjustablereamers,boringmill,inseveralways.6.4.5.4.1Generalrequirementsbeforereamingorboring,212、维修一段公路，第一周维修了全长的18，第二周维修了全长的12%，这时距离这段公路的中点还有204米，这段公路全长多少米？13、仓库有一批大米，第一天运出36吨，比第二天多运了20%，第二天运出的吨数正好是这批大米的37.5%。这批大米共有多少吨？14、工地上的水泥用去了14，又运进250千克，这时工地上的水泥是原来的95%，工地上原有水泥多少千克？15、张师傅第一个月生产了180个零件，合格率是95%，第二个月生产了240个零件，合格率是90%，张师傅这两个月生产零件的合格率约是多少？16、甲、乙两种酒各含酒精75%和55%，要配制含酒精65%的酒3000克，应当从这两种酒中各取多少克？17、爸爸打算把20000元钱存入银行，存期2年。假设一年的年利率为2.25%，两年的年利率为2.79%，你知道几种存钱方式？哪一种更合适？18、小明2008年1月1日把积攒的2000元钱存入银行，整存整取一年，准备到期后把税后利息捐赠给“希望工程”支援贫困地区的失学儿童。如果年利率按4.14%计算，到期时，小明可以捐赠经“希望工程”多少元钱？（利息税率为5%）19、小红家存款10000元，假设年利率保持2.52%不变，一年后，她家