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数的改写知识点总结图文(通用三篇)

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篇1:小学的近似数与改写同步训练题相关知识要点

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求一个小数的近似数的规律:

保留到哪一位,就看这一位一位上的数。如果这个数小于等于,就舍掉;如果大于等于,就往上进一。

299792.458(保留两位小数)299792.458(保留整数)

改写方法

把一个较大的数改写成以万为单位的数,只要在万位的右边点上小数点(一般要去掉小数末尾的),然后在数的后边。

把4443900改写成以万为单位的数,就要把这个数缩小倍,小数点就要向移动位,再在数的后面写上万字。

提高练习

填一填。

(1)在表示近似数的时候,小数末尾的()不能去掉。

(2)保留整数表示精确到();保留一位小数,表示精确到();保留三位小数,表示精确到()。

判断。

(1)6.009保留一位小数是6.0。()

(2)0.4扩大10倍的值与490缩小100倍的值相等。()

(3)583700000=5.837亿5亿()

(4)480000000=48000万=4.8亿()

(5)0.1>0.09999()

(6)359000000035.9亿()

选择,把正确答案的字母填在括号里。

大于2.4小于2.6的数有()个。

A.10B.100C.无数

(2)7.0是一个两位小数的近似数,这个两位数最小是()

A.6.59B.6.91C.6.95

4、求得的近似数是8.0与8,哪一个更精确些?请说明理由。

5、在括号里填上适当的数字。

哪些三位小数的千分位四舍后是5.86。

哪些三位小数的千分位五入后是2.00

6、张大妈有一张存款单到期,按照银行规定,一共应得1325.475元,她在存款时实际得到多少?

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篇2:改写句子知识点梳理

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一、概述

按要求改写句子主要考查学生对句子结构的掌握以及用不同句型表达同一意思的能力。考查所涉及到的句子类型有一般疑问句、否定句、反意疑问句、选择疑问句、对划线部分提问、感叹句、保持原句意思、合并成一句、简单句和复合句之间的互换以及改为被动语态等。

二、解题时需注意的几个要点

1、时态:不同的时态相对应的助动词

一般现在时:谓语动词用原形(主语为第三人称单数时,动词加s或es,变否定句、疑问句时助动词为do或does)

一般过去时:谓语动词用过去式,变否定句、疑问句时助动词为did.

现在完成时:助动词have/has+动词的过去分词

过去完成时:助动词had+动词的过去分词

一般将来时:will/begoingto+动词原形

过去将来时:would/wasorweregoingto+动词原形

现在进行时:am/is/are+动词的现在分词

过去进行时:was/were+动词的现在分词

2、语态:主动语态变为被动语态的谓语结构

一般现在时:am/is/are+动词的过去分词

一般过去时:was/were+动词的过去分词

一般将来时:willbe+动词的过去分词

情态动词:can/may/must/need等情态动词+be++动词的过去分词

3、改反意疑问句时注意hardly,never,seldom,few,little,no等词表达的是否定意义,变反意疑问句时用肯定形式。

4、在合并句子时,有些连词如notonly…butalso…,neither…nor…,either…or…是就近原则,连接两个主语时动词形式取决于与动词邻近的主语。而both…and…连接两个主语时,主语是复数。

5、简单句和复合句之间的互换常见的有:

带有疑问词的宾语从句改为特殊疑问词+to+动词原形的不定式;结果状语从句so…that…改为enoughto或too…to…的简单句。

6、保持原句意思改写句子时注意时态不变。

三、习题

练习一

1.Wedoourhomeworkeveryevening.(改为否定句)

We_________________ourhomeworkeveryevening.对划线部分提问)

________________dotheyhaveaclassmeeting?

3.Shecouldhardlyunderstandthispassage.(改为反意疑问句)

Shecouldhardlyunderstandthispassage,___________________?

4.Themanagertoldhimhowtogetusefulinformation.(改为否定句)

Themanager__________________himhowtogetusefulinformation.

5.Tom’ssistercanspeakEnglishandJapaneseverywell.(改为反意疑问句)

Tom’ssistercanspeakEnglishandJapaneseverywell,__________________?

对划线部分提问)

__________________helivetwentyyearsago?

7.Samdoessomecleaninginthemorning.(改为否定句)

Sam_________do_________cleaninginthemorning.

对划线部分提问)

__________________havethestudentsworkedonthesurvey?

9.Yourfatherusedtorideabike.(改成反意问句)

Yourfatherusedtorideabike,_______________?(对划线提问)

_____________________thepopulationofGermany?

11.Mr.Wangwasheshiscaronceamonth.(改为一般疑问句)

Mr.Wang(对划线部分提问)

willSusancomebackfromAthens?

13.MyfriendslosttheirwaywhentheyweretravelinginHongKong.(改为一般疑问句)

________yourfriends________theirwaywhentheyweretravelinginHongKong?

14.对划线部分提问)

________________hasYaoMingbeenintheRocketTeam?

15.Sheputthedigitalcameraonthebedjustnow.(改为否定句)

She__________________thedigitalcameraonthebedjustnow.

16.MarksflowntoHainanIslandforwinterholidays.(改为反意疑问句)

MarksflowntoHainanIslandforwinterholidays,__________________?

(专辑).(划线部分提问)

_________didSuperGirlZhouBichang_________toVienna?

18.I’vealreadysavedenoughmoneytobuyanewcar.(改为否定句)

I________savedenoughmoneytobuyacar________.

19.Lilyusedtohavelongstraighthair.(改为反意疑问句)

Lilyusedtohavelongstraighthair,________________?

20.Hehasalreadybeenthere.(改为一般疑问句)

__________hebeenthere__________?

21.Theydecidedthattheywouldnthavethepicnicbecauseofthebadweather.(改为简单句)

Theydecided___________________havethepicnicbecauseofthebad

weather.

22.TheEnglishpeoplehardlyevershakehandsbetweenthestrangers.(改为反意疑问句)

TheEnglishpeoplehardlyevershakehandsbetweenthestrangers,____________________?

23.Theygrewsomesunflowersintheirgardenlastyear.(改为否定句)

They____________________anysunflowersintheirgardenlastyear.

24.Janedrinksmilkeverymorning.(改为一般疑问句)

_________Jane___________milkeverymorning?(就划线部分提问)

___________map___________toClass4?

26.Youcanchooseonlyoneofthetwo:amini-TVoraDVDplayer.(改为选择疑问句)

youwantamini-TVaDVDplayer?

27.Thatdetectivefilmissoamazing.(改为感叹句)

______________________amazingdetectivefilm!

28.Hehassomemoneyleft.(改成否定句)

Hemoneyleft.

29.(划线部分提问)

dothemembersofthefilmsocietymeet?

30.Hismotherknewwhythelittleboywasunhappyallday.(改为一般疑问句)

_______hismother_______whytheboywasunhappyallday?

31.Helooksveryfunnywiththathaton.(改为感叹句)

______________helookswiththathaton!.对划线部分提问)

______________theybuildthisfactory?

33.Ihavealreadyfinishedthetestpaper.(改为否定句)

I________finishedthetestpaper________.

34.Johnsondeniedcheatinginthecompetition.(改为反意疑问句)

Johnsondeniedcheatinginthecompetition,________________?(对划线部分提问)________________thestoryneedtobefunny?

36.Samdoessomecleaninginthemorning.(改为否定句)

Sam_________do_________cleaninginthemorning.

对划线部分提问)__________________havethestudentsworkedonthesurvey?

38.(对划线部分提问)__________________hashebeenatopfashiondesigner?

39.对划线部分提问)

________________willtheymoveintothenewschool?

40.togotothePeople’sSquarebyunderground.(对划线部分提问)

_______________didittakeyoutogotothePeople’sSquarebyunderground?

练习二:

1.Goldislessvaluablethandiamond.(保持句意不变)

Goldis________________valuableasdiamond.

2.HetoldthechildrentogoandwatchhistankofGhostfish.(改为被动语态)Thechildren________________togoandwatchhistankofGhostfish.

3.UnlessIhaveaquietroom,Icannotdoanywork.(保持句意不变)

Icannotdoanywork________I_________haveaquietroom.

4.Themanagerarrivedhereafewminutesago.(保持句意不变)

Themanagerhas_________here________afewminutes.

5.TheywillsendhimtoworkinJapanforoneyear.(改为被动语态)

Hewill_________________toworkinJapanforoneyear.

6.Thewordsonthenoticeboardareverysmall.Ican’tseethemclearly.(保持句子原意)

ThewordsonthenoticeboardaresmallIcan’tseethem

clearly.

7.Wecansolvetheproblemswiththehelpoftheteacher.(改为被动语态)Theproblemscan__________________withthehelpoftheteacher.

8.Wecan’tfinishtheworkinsuchashorttime.(保持原句意思)

It’s__________________ustofinishtheworkinsuchashorttime.

9.Wemustkeepthenoiseunder50dbs.(分贝)(改成被动语态)

Thenoisemust_______________under50dbshere.

10.Mikedoesn’tlikeclassicalmusic.Billydoesn’teither.(合并成一句)_________MikenorBilly__________classicalmusic.

11.Theroomissodirtythatwecan’tliveinit.(保持句意不变)

Theroomisn’t___________________forustolivein.

12.Nooneknowswhenwewillstarttomorrow.(保持原句意思)

Nooneknowsstarttomorrow.

13.TheSmithswillinvitetheprofessortotakepartintheparty.(改成被动语态)totakepartinthepartybytheSmiths.

14.Ifyouarenotbrave,you’llloseyourlastchance.(保持原句意思)

youare’llloseyourlastchance.

15.Theystoremuchinformationinthecomputer.(改成被动语态)

Muchinformation________________inthecomputer.

16.Don’tthrowrubbishhereandthere.Ourteachersaidtous.(合并为一句)

Ourteachertoldus________________throwrubbishhereandthere.

17.IfJohndoesn’tapologizeforwhathedid,Iwilltelltheteacherabouthisbadbehavior.(保持原句意思)

_______John_______forwhathedid,Iwilltelltheteacherabouthisbadbehavior.

18.Idontknowwherewecangrowvegetablesinthecity.(改为简单句)Idontknow__________________growvegetablesinthecity.

19.PeopleusedtoenjoythemselveschattingonMSNwhenitworkedwell.(保持句意基本不变)

Peopleusedto_________alotof_________chattingonMSNwhenitworkedwell.

20.Ifyoudon’timproveyourhandwriting,youwilllosemarksintheexam.(合成同义句)

Youwilllosemarksintheexam________you________yourhandwriting.

21.Togofishingisfun.(句意不变)

_____isfun___________fishing.

22.Dickwassoshortthathecouldn’ttouchthetopofthebookshelf.(保持句意基本不变)

Dickwasn’t____________________toreachthetopofthebookshelf.

23.“CanIborrowyourbikeforawhileornot?”(保持句意基本不变)

Tomaskedhissister__________he__________borrowherbikeornotforawhile.

24.Thecouplecouldn’tdecidewhichflattheyshouldchooseatfirst.(保持原句意思)

Thecouplecouldn’tdecidewhichflatatfirst.

25.Meaninglessinformationisdifficultforthelittleboytoremember.(保持原句意思)

isdifficultforthelittleboyremembermeaninglessinformation.

26.Peoplethrowawaymillionsofplasticbagsinourcityeveryday.(改成被动语态)

Millionsofplasticbagsawayinourcity.

27.Shewassocarelessthatshecouldn’tfindthemistakesinhertestpaper.(保持句意基本不变)

Shewas______________tofindthemistakesinhertestpaper.

28.WewillholdthenextOlympicGamesinBeijingin2008.(改为被动语态)

ThenextOlympicGameswill______________inBeijingin2008.

29.Theelderlymanpushedthebirdsintotheriver.(改为被动语态)

Thebirds________________intotheriverbytheelderlyman.

30.Dolphinsaresocleverthattheycanfollowtheinstructions.(保持句意基本不变)Dolphinsare________________tofollowtheinstructions.

31.Wecan’tfinishtheworkinsuchashorttime.(保持原句意思)

It’s__________________ustofinishtheworkinsuchashorttime.

32.TheyinvitedtheastronautandhiswifetothepartyonChristmasEve.(改为被动语态)

Theastronautandhiswife__________________tothepartyonChristmasEve.

33.Thelittlegirldidn’tgotobedunlessthegrandmothertoldherastory.(保持句意基本不变)

Thelittlegirldidn’tgotobed_________thegrandmother_________tellherastory.

34.Theplaneissobigthatitcancarry300passengersatonetime.(改为简单句)

Theplaneisbig__________________carry300passengersatonetime.

35.Didtheyknowtheanswertothequestion?Ididn’tknow…(合并为一句)Ididn’tknow________theyhad________theanswertothequestion.

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篇3:知识点总结

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"文学常识"包括:中国重要作家的时代及其代表作,外国重要作家的国别及代表作,文学体裁常识。

"重要的作家及代表作"是指在中外文学史上,有重大影响的作家、作品。这些著名的作家、作品,是毕业生应该掌握的。"文学体裁"主要指的是文学四分法所说的诗歌、小戏剧、散文四种体裁。

文学常识这部分的内容,知识性强,学习方法主要以记忆为主,但从命题的主旨看,并未提倡死记硬背,主要考查学生在掌握知识的基础上,能运用已掌握的知识来分析问题、解决问题。

就试题的内容看,往往是综合性的,覆盖面大,如果没有这方面的系统知识,要想学好是不容易的。这就要求要牢固掌握这方面的系统知识,在复习的方法上,应当以文学史为纲来复习记忆。

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