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一个数由3个千万，4个十万，5个千，6个百和7个十组成，这个数写作 ，改成用“万”作单位的数是 万，四舍五入到万位约为 万．
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一个数由8个千万4个十万8个千3个百和7个十组成这个数写作四舍五入到万位约为万．
一个数由4个千万5个千和3个十组成那么这个数写作读作．
一个数由5个千万3个百万6个万2个百和8个十组成这个数写作．
一个数是由9个亿5个千万5个十万和4个十组成的这个数写作省略亿后面的尾数约亿．
一个数由8个千万4个十万8个千3个百和7个十组成这个数写作四舍五入到万位约为万．
一个数由6个亿7个百万5个千和3个十组成这个数写作．
一个数由5个千万4个十万8个千3个百和7个十组成这个数写作改成用万作单位的数是万四舍五入到万位约为
一个数由9个亿6个千万个3个十组成这个数是．
一个数由8个千万2个十万8个千4个十组成这个数写作四舍五入到万位约是万．
一个数由3个百万5个千4个十组成这个数是．
由6个十万3个百和4个十组成的数是多少结果正确的是
600340
6003400
603400
一个数由8个亿4个百万5个十万6个千7个十组成它是．
一个数由3个十亿7个百万5个万和6个十组成这个数是．
一个数由3个千万4个十万2个百和7个十组成这个数是读作．
由4个千万8个十万6个千7个十组成的数是读作．
一个数由5个千万4个十万8个千3个百和7个十组成这个数写作改成用万作单位的数是万四舍五入到万位约为万
一个数由9个十万9个千和9个十组成这个数写作．
一个数由2个百万7个十万6个千和5个十组成．这个数写作省略万位后面的尾数约是．
一个数由6个千1个百和5个十组成这个数是．
一个数由8个千万6个十万5个万4个百和2个一组成这个数写作
80650402
86500402
800650402
806500402
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下列从左到右的变形是因式分解的是A．3-x3+x=9-x² B．y+1y-3=3-yy+1C．4yz-2y²z+z=2y2z-zy+z D．-8x²+8x-2=-22x-1²
已知x+y=3xy=-7．求x-y2的值．
WhenRonaldReaganwhowasPresidentoftheUSAfrom1982to1989diedin2004manypeoplerememberedhisgoodsenseofhumor.Reaganenjoyedagoodjokeandoftenmadefunofhimself.Hewasveryoldalmost70yearsofagewhenhebecamePresidentoftheUSA.Becauseofthispeopleoftenjokedabouthisage.OnceduringameetingPresidentReaganwascomplainingaboutsomereporterswhosaidthathecouldnothearverywell.HewantedtoprovethathewashealthyandcouldhearwellsohetookouthishearingaidandsaidtothepeopleatthemeetingSaysomething.Onemanpretendedtospeak.Hemovedhismouthandmademovementswithhishands.EveryonethoughtReaganwouldbeangrybuthelaughedandlistenedforaverylongtime. PresidentReagannotonlyenjoyedagoodjokewhenhewasrelaxingbuthealsolikedtojokeduringserioussituations.In1981hehadashotaccident.Atthehospitalhejokedtothedoctorsthathehopedtheysupportedhiminthegovernmentandwouldlethimalive.Hewasabletokeephissenseofhumorevenwhenhewashurt. 29.RonaldReaganwasintheyear1985. A.areporterB.anactorC.adoctorD.apresident 30.ThereasonwhypeoplejokedaboutReagan'sagewasthat. A.hebecamePresidentoftheUSAattheageofalmost70 B.hewasnotoldenoughtobePresidentoftheUSA C.hecouldnotliveanormallifeathisage D.helackedasenseofhumorathisage 31.DuringameetingReagantookouthishearingaidtoprove. A.therewassomethingwrongwithhisears B.hewasabletomakeagoodspeech C.hewashealthyenoughtohearwell D.hehadagoodsenseofhumor 32.WhatsentRonaldReagantohospitalin1981? A.Hispoorhearing. B.Hisaccident. C.Hisoverwork. D.Hisillness.
如果a=b那么|a|=|b|该命题的逆命题是命题填真或假
若a2+2a=1则a+12=
因式分解4xa-2-2y2-a
因式分解a-ba-4b+10ab
已知2a=52b=102c=50那abc之间满足的等量关系不成立的是A．c=2b-1 B．c=a+b C．b=a+1 D．c=ab
简便计算982-101×99
若xm=2xn=3则xm+2n的值为
用乘法公式进行简便计算992
阅读材料若m²-2mn+2n²-8n+16=0求mn的值． 解∵m²-2mn+2n²-8n+16=0∴m²-2mn+n²+n²-8n+16=0∴m-n²+n-4²=0∴m-n²=0n-4²=0∴n=4m=4．根据你的观察探究下面的问题1已知x²+2xy+2y²+2y+1=0求2x+y的值2已知a-b=4ab+c²-6c+13=0求a+b+c的值．
计算-2a22a2+3a-5
Ittookmemorethantwohourstocleanoutthefridgeandfreezerlastweek.AfterI41everydrawerandthrewaway42leftoversIwenttothegroceryshopforthefirsttimeinmonths. I'drunintotheshopforaloafofbreadmilkoreggs.I43fruitsandvegetablesandcleanedandcutthemintosmallpiecestostoreinmynewlycleanedfridge.I44clothesoutfromunderthegirls'45andwashedthem.Itookthree﹣inchpilesofpapersoutoftheirschoolfoldersandread46fromtheirteachers. Afterafewmonthsofworkinglike47IspentlastweekworkingasMomma.WhenyouareThemommaalotof48youfeellikethereisnoone49behindyoutotakeupthechores杂物.Icannot50imaginehowitmustfeeltobean51parent.ButI'mforfortunatebecauseasI52myselfinworkmyhouseandmychildren's53didn'thavetosuffer. MyhusbandZeb54uptotakecareofmykidandhome.Mymothercametostaywithmeforacoupleofweeks55Zebtravelledforwork.ThentherewasMrs.VelmamyangelIsentstraighthomefromheavenwhodoesasamatteroffactcleanmy56betterthanIevercouldbutwhomore57fillsmyhousewithpositiveenergyandwouldn'tletmeget58. Workingparentsall59tofindthebalancebetweenworkandhomethejobandfamily.Ipersonallydon'tthinkthatbalanceexistswithout60.WhileIwasontheworkendmymomVelmaZebandMadeleinemybabysittergavemehelp. 41.A.searched B.emptied C.watched D.noticed 42.A.broken B.separated C.unrecognizable D.different 43.A.judged B.sent C.bought D.took 44.A.kicked B.put C.picked D.dug 45.A.boxes B.cupboards C.beds D.tables 46.A.notes B.blame C.instructions D.articles 47.A.blind B.crazy C.mindless D.angry 48.A.ways B.aspects C.times D.moments 49.A.hiding B.running C.standing D.calling 50.A.still B.yet C.already D.even 51.A.strict B.loving C.single D.hard﹣working 52.A.stick B.devote C.absorb D.involve 53.A.lives B.study C.homework D.relationship 54.A.woke B.stepped C.put D.got 55.A.before B.since C.while D.if 56.A.bedroom B.yard C.road D.house 57.A.luckily B.gladly C.importantly D.diligently 58.A.angry B.pleased C.relaxed D.discouraged 59.A.deserve B.struggle C.keep D.continue 60.A.effort B.knowledge C.support D.judgment
因式分解x2+ax+b甲看错了a的值分解的结果是x+6x﹣2乙看错了b的值分解的结果为x﹣8x+4那么x2+ax+b分解因式正确的结果为
阅读理解寻找规律已知x≠1观察下列各式1-x1+x=1-x21-x1+x+x2=1-x31-x1+x+x2+x3=1-x41填空1-x=1-x8．2观察上式并猜想①1-x1+x+x2++xn=②x-1x10+x9++x+1=3根据你的猜想计算①1+2+22+23++210=②-32019+-32018+-2017+-3+1
计算b5+b5得A．2b5 B．b7 C．b25 D．b10
因式分解a²a-b+4b²b-a
计算2x2y3-x4y-5x3y2
Kidsattractedto2017SwedishOutdoorShowasspringstarts STOCKHOLMMarch12Xinhua﹣﹣AlthoughstillcoldintheNordicinearlyspringSwedishkidscouldn'twaittogoforoutdooractivitiesintheearlyspring. OnSaturdayoutdoorclubsandexhibitorsbroughttheirnewproductstotheSwedishOutdoorShow2017inStockholmandencouragedkidstoplayandjointheiractivities. Thisisgoldpanning淘金thatwedointhemiddlepartofSwedenasmalltowncalledKopparberg.ItisaniceactivityforchildrenforadultsjusttobeoutinthenatureandseethelovelynaturethatwehaveinSwedenandmaybefindsomegoldexhibitorUllaKalander﹣KarlssontoldXinhua.TheyhaveseentheprogramontelevisioncalledGoldRushthatcomesfromCanada.Somanypeopleareinterestedingoldpanningtheywanttoberich.Butyoudonotberichyoujustberichofseeingthenaturesheadded. ApartfromtraditionalactivitieslikekayakingandclimbingdivingisanotherfavoriteoutdoorsportsfortheSwedes. Stockholmissurroundedbylakesandeveryoneisreallygoingintolakesanddivingswimmingetc.KidsaretaughttoswimalreadyinschoolsoeverySwedishkidcanswimandgoingfromthereintodivingiseasyofcourseexhibitorAndersHolmbergtoldXinhua. Thethree﹣daySwedishOutdoorShowlastsuntilSundayandisexpectedtobringabout30000activeoutdoorpeoplewithdifferentinterestsandlevelsofexperience. 32.ThemainpurposeofholdingSwedishOutdoorShowisto. A.makesomepeoplebecomerich B.makeaprofitfortheorganization C.getmorepeopletogetclosetonature D.makepeoplemuchstrongerinhealth 33.Theunderlinedpartinthefirstparagraphprobablymeans. A.werenotwillingtogo B.hadastrongdesiretogo C.couldhavenoalternativebuttogo D.couldn'tdecidewhethertogoornot 34.Theauthor'spurposeofwritingthepassageisto. A.informB.entertainC.persuadeD.describe 35.Whichofthefollowingcanbethebesttitleforthepassage? C.ThePastandPresentofSwedishOutdoorShow B.NewProductsAddedto2017SwedishOutdoorShow A.AnOverallIntroductionof2017SwedishOutdoorShow D.KidsAttractedto2017SwedishOutdoorShowasSpringStarts.
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观察x-1x+1=x2-1x-1x2+x+1=x3-1x-1x3+x2+x+1=x4-1据此规律当x-1x5+x4+x3+x2+x+1=0时代数式x2015-1的值为
若n为正整数则--5n+1÷-5n+1的结果为A．1 B．-5n+1 C．0 D．-1
2017﹣03﹣10chinadaily.com.cn MotherNatureinChinesephotographer'slens Forthosewhohaven'tgotthetimetotravelthisexhibitionfeaturingnumerousphotosofthebeautyofMotherNaturewillbeadelightfortheweekend.Fromthesephotosvisitorscanseethegreatnessandpowerofnatureandthedifferencesbetweenhumansandanimals. Time9am﹣5pmthroughMar19closedonMondays VenueNationalArtMuseumofChina1WusiAvenueDongchengdistrict. TicketFree Contact010﹣64001476 TheBritishMuseumbringsahitshowtoBeijing TheBritishMuseum'shighly﹣acclaimedAHistoryoftheWorldin100Objectshasattractedmorethanonemillionvisitorsduringitsworldtour.ThatnumberisgrowingfastwithitsChinalegprovingasuccesssinceitopenedinBeijinglastweek. TheexhibitiondevelopedfromabroadcastingseriesthattheLondonmuseumstartedinpartnershipwiththeBBCin2010.Each15﹣minuteprogramintroducedoneof100objectsfromthemuseum'scollectionthatrevealed展现thecommunicationmethodsofvarioushumanculturesoverthecourseoftwomillionyears. Time9am﹣5pmthroughMay31closedonMondays VenueNationalMuseumofChina16EastChang'anAvenueDongchengdistrict. Ticket50yuan Contact010﹣65116400 Whenphotographslooklikepaintings Thelinebetweenpaintingandphotographyhasblurred模糊inconceptualartist概念艺术家FuWenjun'sworks.Fornearly30yearshehasdevotedhimselftotheexplorationofproducingphotosthatlooklikeabstractpaintingstoinspirepeopletothinkratherthansimplyappreciatetheaccuracyofimages.Fu'songoingexhibitionaimstoprovidemoreinsightsintohisartworld. Time9am﹣5pmthroughMarch19closedonMondays VenueNationalArtMuseumofChina1WusiStreetDongchengdistrict. TicketFree Contact010﹣64001476 Museumcelebrates80﹣year﹣oldlacquermaster KnownasthefatherofmodernChineselacquerart80﹣year﹣oldQiaoShiguangbreathesnewlifeintothecountry'slong﹣standingtraditionoflacquerpainting漆画. Heapplieseggshellchips蛋壳碎片todemonstratethepeacefulbeautyofSouthernChina.ThelacquerpaintsunderhisbrushespresentsthedepthofEasternaesthetics. Time9am﹣5pmthroughMar19 VenueNationalCenterforthePerformingArts2WestChang'anAvenueXichengdistrict. TicketFree Contact010﹣66550000 25.AccordingtothetextwecanlearnthatFuWenjunisan. A.photographerB.lacquerpainterC.broadcasterD.conceptualartist 26.AssumingyouareinterestedintraditionalChinesepaintingswhencanyougoandenjoyoneaccordingtothetext? A.10amMar31B.3pmMar19C.9pmMay31D.10amMay19 27.Youcanenjoythefollowingartworksfreeofchargeexcept. A.FuWenjun'sworks B.QiaoShiguang'sworks C.photosofthebeautyofMotherNature D.AHistoryoftheWorldin100Objects.
已知x-m2=x2+x+a则m=
用简便算法计算-8111×333
假如英语课上老师要求同桌之间交换修改作文请你修改你同桌的以下作文.文中共有10处错误每句中最多有两处.错误涉及单词的增加删除或修改. 增加在缺词处加一个漏词符号∧并在此符号下面写出该加的词. 删除把多余的词用斜线\划掉. 修改在错词下面划一横线并在该词下面写出修改后的词. 注意 1.每处错误及其修改均仅限一词 2.只允许修改10处多者从第11处不计分. OurEnglishteacherMs.Joancametoourschoolin1986.ShetaughtEnglishfornearly31yearssofar.Sheworkshardlyandhasbeenamodelteacherforages. Sheiskindtousbutsheisratherstrictwithusaswell.ShealwaysencouragesourselvestospeakandreadmoreEnglish.Sheisgoodatteachingandtriesherbesttomakeeverylessonlivelyandinterested.Sheisnotonlyourteacherandalsoourfriend.Westudentsloveandrespectforher. Tomorrowsheisgoingtoattendaimportantmeetingatwhichshewillbegivenamedalforhisadvanceddeeds.Webothsincerelycongratulateheronachievingsoextraordinaryachievements.
3a+3b+13a+3b-1=899则a+b=
用乘法公式进行简便计算20182-2017×2019
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