错题集一
四年级上册数学错题集
四年级上册数学错题集一、大数的认识1. 题目：读数：300005000，错误答案：三亿零五千。
解析：读这个数时，从高位读起，亿级是3，读作三亿；万级都是0，只读一个零；个级是5000，读作五千。
正确答案应该是三亿零五千。
这里容易出错的地方在于万级的0的读法，每级末尾不管有几个0都不读，其他数位上有一个0或连续几个0，都只读一个零。
2. 题目：写数：三十亿零三百，错误答案：300000300。
解析：三十亿零三百，十亿位是3，百位是3，其他数位是0，正确写法应该是3000000300。
错误原因是没有正确理解每个数位上的数字，导致少写了0。
二、公顷和平方千米1. 题目：1公顷 =（）平方米，错误答案：100。
解析：因为1公顷是边长为100米的正方形的面积，根据正方形面积 = 边长×边长，100×100 = 10000平方米，所以1公顷 = 10000平方米。
这里错误是对公顷和平方米的换算关系没有牢记。
2. 题目：一个长方形果园长500米，宽200米，这个果园的面积是多少公顷？错误答案：直接用500×200 = 100000（平方米），回答100000公顷。
解析：首先算出果园面积为500×200 = 100000平方米，然后将平方米换算成公顷，因为1公顷 = 10000平方米，所以100000平方米=10公顷。
错误在于没有进行单位换算。
三、角的度量1. 题目：用量角器量角时，角的一边与量角器内圈0°刻度线重合，另一边指向120°，这个角是（）度，错误答案：120°。
解析：当角的一边与量角器内圈0°刻度线重合时，另一边指向120°，这个角应该是60°。
因为内圈刻度是按照逆时针方向读数的，而我们通常用量角器量角时，按照顺时针方向读数是外圈刻度，这里容易混淆内圈和外圈刻度的读数方法。
2. 题目：一个平角分成两个角，其中一个角是锐角，另一个角是（）角，错误答案：锐角。
错题集一(刘金娥2014.9.16-9.18)1
错 题 集 一编写 ：刘金娥时间：2014 . 9 .16-9.181.环己烷可制备1，4-环己二醇，下列七步有关反应（其中无机产物都已经略去）中，其中有两步属于取代反应，两步属于消去反应，三步属于加成反应，试回答：（1）反应 和 （填写序号）属于取代反应。
（2）写出下列化合物的结构简式：B ：C ：（3）反应④所用的试剂和条件分别为： ， ； （4）写出①、④的化学方程式：①： ； ④： 。
【答案】：（1）①、⑥ （2）B ： C ：（3）NaOH 醇溶液，加热；（4）①：；④：2、下图为苯和溴的取代反应的改进实验装置图。
其中A 为具支试管改制成的反应容器，在其下端开了一小孔，塞好石棉绒，再加人铁屑少量。
填写下列空白：（1）向反应容器A 中逐滴加入溴和苯的混合液，几秒钟内就发生反应。
写出试管A 中所发生反应的化学方程式（有机物写结构简式）_____________________________________； （2）试管C 中苯的作用为________________________________________；（3）反应2至3min 后，在盛NaOH 溶液的B 中可观察到的现象为_________________________； （4）在上述整套装置中，具有防倒吸作用的仪器有____________________（填字母）； （5）改进后的实验有a 、步骤简单，操作方便，成功率高；b 、药品用量少；c 、各步现象明显；d 、对产品便于观察这4个优点，还有—个优点为_______________________________； （6）能说明苯与溴发生的是取代反应而不是加成反应的现象为_________________________。
NaOH 溶液苯AgNO 3溶液 石蕊试液【答案】（1）（2）除去HBr中混有的Br2；（3）溶液底部有无色油滴（4）DEF；（5）整套装置在密闭系统中进行，不会造成环境污染；（6）D中石蕊变红或E中产生淡黄色沉淀3．下列各组物质中，全部属于纯净物的是（）A．福尔马林、白酒、醋B．丙三醇、氯仿、乙醇钠C．苯、汽油、无水酒精D．甘油、冰醋酸、煤[参考答案]B4．下列各组物质中，属于同系物的是（）A．硬脂酸、软脂酸B．CH3COOH、C3H6O2C．D．HCHO、CH3COOH[参考答案]A３5 ）A．乙醛、乙酸B．甲酸乙酯、丙酸C．CH3CH2CHO、D．CH3CH2CH2OH、CH3OCH2CH3[参考答案]A6．乙醇分子中各化学键如图所示，对乙醇在各种反应中应断裂的键说明不正确的是（）A．和金属钠作用时，键①断裂B．和浓硫酸共热至170℃时，键②和⑤断裂C．和乙酸、浓硫酸共热时，键②断裂D．在铜催化下和氧气反应时，键①和③断裂[参考答案]C7．下列说法中，正确的是（）A．含有羟基的化合物一定属于醇类B．代表醇类的官能团是与非苯环上的碳相连的羟基C．酚类和醇类具有相同的官能团，因而具有相同的化学性质D．分子内有苯环和羟基的化合物一定是酚类。
数学运算错题集一题
数学运算错题集1、五个人的体重之和是423斤，他们的体重都是整数，并且各不相同。
则体重最轻的人最重可能是（）A80 B82 C84 D86解释：题目要求最轻的人最重是多少？而且5个人的体重各不相同。
也就是说，总体重一定的情况下。
数字大的尽可能和数字小的靠近那样数字小的才会相对最重。
只有连续自然数满足这个条件。
方法一（平均值法）：我们看，5个人的总重量是 423斤，根据连续自然数的特征，423/5=中间数（平均数）＝84 余数是3那么我们知道这5个自然数的序列是 82，83，84，85，86 还剩下3斤不可能分配给最小的几个人否则他们就会跟后面的数字重复了所以这3斤应该是分配给最重的几个人，对轻者无影响。
方法二（设最小值法）：设最轻的人最重可能是X尽，则：X＋(X+1)+(X+2)+(X+3)+(X＋4)＝4235X＝413X＝82 总数余3即：这5个自然数的序列是 82，83，84，85，86 还剩下3斤，剩下3斤不可能分配给最小的几个人否则他们就会跟后面的数字重复了所以这3斤应该是分配给最重的几个人，对轻者无影响。
答案就是82 选B或者：抽屉原理的变型~~抽屉原理解题有个原则，就是最不利原则，一切往最坏的地方想，“体重最轻的人最重可能是多少”，最不利情况就是N，N+1...N+4，总共是5N+10,5N+10=423，解得N=82.6 N已经是最大可能了，又因为是整数，所以是82 。
2、已知连续四个自然数的积是1680,这四个数的和是（）A、22B、24C、26D、28------------------------------解：方法一：分解因式法：1680＝2×2×2×5×6×7 一目了然这四个数是5，6，7，8 和为26。
这个方法对于比较小的数字适合。
如果数字比较大的话。
分解因式是个耗时的做法。
另外当四个连续自然数全是合数的情况，那么分解因式来解决此类型题目就更加困难。
初一错题集1
初一错题集 Unit1-41.They have some rulers in their bags.(同义句)2.Are you ?Yes, we are brothers.(twin)3.You (not be) friendly to your classmates.4.What does your father often to you? He often tells me not to inclass.A.s ay talkB.talk sayC.say sayD.talk talk5.My father with me (fly) a kite every Saturday.6.It takes about ten minutes to walk to the museum.(对划线部分提问)to walk to the museum.7.Our school is near the zoo.(同义句)Our school is the room.8.Please take your books after school.A.t o homeB.your homeC.homeD.at home9.Lily’s watches sports news at night.A.twins brother;much tooB.twin brothers;too muchC.twin brother;too muchD.twins brothers;too many10.I usually sit the classroom,so that I can hear the teacher who likes to standthe class clearly.A.i n front of;in the front ofB.in the front of;in front ofC.in front of;in front ofD.in the front of;in the front of10.I hope you and your family .A.w ellB.are well lC.fineD.are good11.Yao Ming, (like)his parents, (like)playing basketball very much.12.The supermarket (close)at 9p.m..It is (open)between 9a.m.and 9p.m..So it is (close)from 9p.m. to 9a.m..13.(read) English every day. (read)can help you improve( 提高)yourEnglish.(read)14.Would you (go) to the zoo tomorrow.15.Do you often do your homework after (have)dinner.16.My favourite fruit (be)apples.17.There are different kinds of kites (fly)in the sky.18.If a girl doesn’t know wear,she can ask her best friend for help.A.what toB.how toC.what canD.how can19.What’s your family like? .A.They are kind.B.It’s a happy one.C.They are tall.D.They like sports.20.He is never late for school? ,he is always the first to get to s chool.A.Yes,he does.B.No,he isn’t.C.Yes,he is.D.No,he doesn’t.21.The books are one of my (hero).Jerry Lin Shuhao is one of jimmy’s(hero).He plays basketball well.22.Look!Each girl in our class (have)a new shirt now.23.(chat)with each other online is fun.24.He is one of the (good)students in our class.25.She does (well)in swimming of us three.26.does Andy’s father look? He looks strong and tall.A.HowB.WhenC.WhereD.What27.Mary;s daughter looks good the dress.A.w ithB.inC.onD.at28.I go to school on weekdays.(同义句)29.What do you get (介词)your birthday?30.Good morning (介词)you.31.What about (wake) (he)up?He has much homework(do).32.We have fun (chat)with each other at lunch.33.Would you please (not shout)in the library, it’s not polite.34.Look,the window is (open)now,please close it.37.Mum (get)ready for supper,while I (write)my home.38.I hope you our home one day,Daniel.A.to visitB.visitC.will visitD.are visiting39.41.Here for you.A.are some good newsB.is some good newsC.are some piece of good newsD.is some pieces of good news.42.There are many flowers on sides of the street.A.eachB.everyC.bothD.all43.Let’s(be) at home together this afternoon.44.There are some pictures the wall and some windows the wall,too.A.on onB.on inC.in onD.in in45.Jill, (not be)late for the meeting.46.Is the girl a dress your classmate?A.toB.onC.inD.with47.48.are good friends.A.I you and DickB.Dick you and IC.You I and DickD.You Dick and I49.Look at today’s newspaper.Some news really interesting.A.doesB.isC.areD.do50.We should “thank you” when someone lends something to us.A.tellB.speakC.sayD.talk51.She has a sister,and he has ,too.A.the oneB.onesC.oneD.her52.One of the students often her with her English in the class.A.helpB.to helpC.helpingD.helps53.I that I can send my best to Kitty on New Year`s Day.Wonderful! I believe your dream on that day .A.hope, wish, comes trueB. hope, wishes, comes trueC. wish , wishes, comes trueD. wish, hopes , come true.54.Excuse me , could you English in class?Yes, of course. I am very good at English stories.A.Say, talkingB. tell, sayingC. Speak, tellingD. Tell, speaking55.Who sports in your family? My brother and I .A.Likes, isB.like, amC. Like, areD. Likes, do56.I live far away from the school and I often a bus to school. What about you?I go to school , it takes me about ten minutes.A.by, on bikeB. take, by bikeC. by, ride a bikeD. take, ride a bike.57.We have a (parent) meeting once a month.58.Today is Teacher`s Day, best to you ,Miss Wang.59.The students go out for a trip twice a week. (对划线部分提问)do the students go out for a trip?lie does after-school activities in the afternoon. (否定句)Millie61.I can`t hear you after-school activities in the afternoon.(good) on the phone.62.Where your family (have) breakfast on Sundays.63.I have daughter.A.A eight-year-oldB. eight years oldC. An eight-year-oldD. Eight-years-old64.They come from . They are (英国)65.He with his family in Nanjing now. (live)66.He often others, and he is (help)67.How many are there in your school? (年级)68.Look, the window is (open) now, please close it.69.There is no salt in the kitchen. Would you like t o get ?A.itB. oneC. someD. any70.Don`t make Kitty that. She is tired. (do)71.72.She every day.A.Walk homeB. Walk to homeC. Walks homeD. Walks to home73.What (其他的) do you want to drink?74.One of the boys (play) football now.75.the girls like badminton? (like)76.American people usually rice.(eat)77.78.It is fun (read) an (interest) book.79.We have fun (travel) all over the world.80.The parents` meeting begins two o`clock the afternoon November 15th.A.at , in , ofB. At, on , on ,C. At, on , ofD. In , in , on。
初一英语错题集
初一英语错题集错题集〔一〕 22/12/20221. The final test is difficult . Only few students have passed the exam, they?A. haven’tB.haveC.didn ’t2.Take it easy. The police here. Everyone OK.A.is ing, will beB.are ing, will beC.es. is3. —I felt really sorry for Liu Xiang when I watched him down in the match. -- A.falling, So I didB.fall, So did IC.falling, So did I4.My mother dressed us the same cloyhes.A.inB.onC.with5.Now I am growing old and I feel very different my twin pother.A. inB.fromC.with6.Several years and David became a strong young man.A.passedB.pastC.goes by7.Suddently he was awakened and heard his uncle to his outside.A.shoutB.shoutingC.shouted8.Mr.Shut became angry and shouted , ‘Why you e out yet?’A.don ’tB.didn ’tC.haven ’t9.Don ’t you think we really need a dictionary ?A.to look the word upB.to look the word up inC.to look the word up with10.If you want to study English well,please every morning.It helps .A.read aloud, a lot ofB.read loudly, a lotC.read aloud, a lot11.My mom never give me pocket money , so I have to make money some other ways.A.inB.withC.by12.On holidays,give your customers coupons(优惠券) they will keep ing back to you for your service or products.A.as soon asB.so thatC.now that13.Premier Zhou for many years,but he still lives in the hearts of Chinese people.A.has diedB.has been diedC.has been deadA.Either,usingB.Neither, to useC.Both,use15.Children and adults always don’t know how to deal with or treat someone a disability.A.inB.forC.with16.I was that I would be late for school.A.afraidB.sureC.sorry17.Teenagers can’t drive on busy streets .A.without being allowedB.without permitC.without being allowed to18.You must tell your daughter it is in this mysterious place you met your husband.A.that, whereB.that,thatC./, where19.He told me he fished for a living to his daughter.catedB.supportC.offer20.What a mess！ Your table different things. Why not clean your table？A ．cover with B.is covered with C.is covered21.In America，teenagers can’t beer by law.A ．offer to B.be offered C.be offered to22.I never saw her angry ，never saw her .A ．cry B.smiling C.crying23.I cleaned the desk carefully and found some papers -- a photo of my father and a one-page letter.A ．inside B.indoors C.outside24.Something . The house is filled with strangeA ．smells badly，smell B.is smelt badly，smellsC.smells bad，smells25.It ’s to get a C than to fail in the exam. So take it easy. Try harder next time.A ．a less problem B.less a problem C.less of a problem26.People read the result of the medical research by Dr. Smith and learned a lot from it.A.to doB.doingC.done27.Audi as a car pany is very famous in the world. It is famous its popular cars and special designs.A ．as B.for C.with28.Now it that a two-wheel bike of 2022 will einto our life.A ．is said B.was said C.says29.The e-bike doesn’t use any stratighly.A ．electric B.electrical C.electricityA.evenB.althoughC.even though31.Dolphins use different sounds to information with each other.A.exchangeB.changeC.discuss32.The groups really cool clothes. But that’s not really important me.A.put on,toB.wear, forC.are wearing, to33.I listen a CD Heart Stering.A.of, calledB.to,with the name ofC.to, calling34.--Must I finish the wor k before five O’clock.--No. You finish it eight.A.musn ’t, atB.needn ’tC.can,by35.I repeat the story by teacher just now.A.was letB.is letC.was let to36.Thanks to the project and the kindness of his family and neighbours, he was able to recive anoperation just to prevent the illness from getting worse.A. in timeB.on timeC.at the same time37.--It ’s kind you to e to see me.--It ’s my pleasure. You were so kind me.A.of, withB.for, withC.of, to C.for,to38.You may go fishing if you work A.is done B.will be done C.has done39.He still remembers the days he spent with your family.A.whenB.whereC.thatD.on which40.Mr. White car had been stolen, came to the policeman.A.whoB.thatC.whoseD.which41. you didn’t get good grades, you’d better study harder.A.Now thatB.WhenC.Although42.There used to an old temple in this village, there?A.have, didn’tB.be, usedn’tC.be,did43.Only the help of the teachers and parents deal with problems easily.A.with, we canB.for,can weC.with,can weof them has a chance to another town.A.Both, to moveB.Everyone, to moveC.Every one,of moving错题集〔一〕 2022年12月22日 1.2. 3.4. B B B watch sb do sth表示看见某人做某事，也指看某人某物的总过程；而doing 表示看见正在做A 首先，dress 是及物动词，意为“为... 穿衣”,用法是dress sb，如：The babysitter dresses the baby everyday.保姆每天都要给宝宝穿衣。
英语五年级错题集(一)
1. Look at the boys! What（）they（）there?A. are; doB. do; doesC. are; doing2. Please send me an email （）**************************.A. inB. toC. at3. — What's Tom like?—（）.A. He's cleverB. He's a studentC. He's good at sports4. — When is the summer vacation?— It's in （）and （）.A. April; MayB. July; AugustC. May; June5. Miss Li is my （）Chinese teacher.A. oneB. firstC. the first6. 阅读短文，判断句子正（T）误（F）Traffic lights are the same in every country. There are three lights—red, yellow, and green. Red means “stop”. Yellow means “wait”, and green means “go”. In China, people drive on the right side of the road. But in Britain, Japan and Australia, people drive on the left side of the road.(1). ( )The traffic lights are the same in every country.A. TB. F(2). （）Yellow means “wait”.1A. TB. F(3). （）In China, people drive on the left side of the road.A. TB. F(4). （）In Australia, people drive on the left side of the road.A. TB. F(5). （）Red means “go”.A. TB. F7. Many people like collecting(收集) things. For example, they like collecting stamps, books, pictures. But my friend Mr. King likes collecting clocks. He has five hundred clocks now. There are clocks everywhere in his house. You can see shelves standing in every room. All the shelves are full of clocks. Though Mr. King is glad to do this, his wife doesn't enjoy it at all. She has a lot of work to do every day. It's not easy for her to clean hundreds of clocks. She is also angry at the noise. Each clock keeps its own(自己的) time, so she can hear clock strike(敲) almost any time during the day and night. "There's something even worse. I'm never able to know what time it is with so many clocks around!"(1).Mr. King is.A.a clockB.a clock sellerC.interested(感兴趣的) in clocksD.good at repairing clocks(2).Which of the following sentences is right?A.Mr. King keeps the clocks only in his bedroom.2B.His wife likes collecting clocks, too.C.There're some shelves with nothing on them. D.All the shelves are full of clocks.(3).Mrs. King .A.is busy cleaning the clocks every dayB.likes collecting clocks, tooC.helps Mr. King collect clocksD.likes cleaning the clocks(4).Mrs. King doesn't know .A.her husband's favourite thingB.which clock tells the right timeC.when the clocks strikeD.how to clean the clocks(5).From the passage(段) we know .A.few of the clocks keep the right timeB.most of the clocks keep the right timeC.all the clocks strike at the same timeD.3it's always quiet in their house8. FriendsOne day, Mike and Jack are walking in the forest. "We are good friends. If (要是) we meet a bear, I will help you." Mike says. "I'll help you, too." Jack says. Later, there is a big bear in front of them. Mike and Jack run very quickly. Then Jack climbs up a tree and forget (忘记) all about his friend. Mike is too fat and he lies down (躺) on the ground and closes his eyes. "The bear will think I'm dead (死的)." The bear comes up to Mike and looks at him, puts his nose to Mike's ears. The bear thinks Mike is dead, so it goes away.Jack comes down from the tree with a smile (微笑), and he asks his friend. "What does the bear say to you?" "The bear says, 'A friend in need is a friend indeed.'"(1).Mike and Jack are walking .A.in a mountainB.in the forestC.on a farmD.by a river(2).They meet a in the forest.A.dearB.big tigerC.big bearD.reptile(3).climbs up a tree quickly.A.4JackB.MikeC.The bearD.Jack and Mike(4)."A friend in need is a friend indeed" means (意思是) in Chinese.A.莫逆之交B.患难见真情C.情同手足D.肝胆相照(5).Which is NOT RIGHT (不对)?A.Jack climbs up the tree and Mike lies down on the ground.B.The bear can't climb the tree.C.The bear says to Mike, "A friend in need is a friend indeed."D.They are walking in the forest.9. 阅读短文，选择正确答案。
高二错题集一
错题集一姓名：日期：1.集合A=，B=，C=，D=，若a，b B，则有（）A. a+b AB. a+b BC. a+b CD. a+b D2. 已知f(x)是定义在R上的偶函数，当x>0时，f(x)是增函数，若，则下列各式中一定恒成立的是（）A. f()+ f()>0B. f()+ f()<0C. f()+ f()>0D. f()- f()<03.等比数列a+，a+，a+的公比是 .4.y=2sin(-3x+)的增区间是 .5.已知函数f(x)的图像如图所示，下列数值排序正确的是（A. 0<<<B. 0<<<C. 0<<<D. 0<<<6.已知k<-4，则函数y=-2的最小值是 .7.已知函数f(x)=，当x=2时取得最大值，则f(1)+ f(2) + f(3)+…+ f(2018)的值为 .8.函数y=cosx|tanx|(0，x)的图像是( )9.在ABC中，角A，B，C所对的边分别为a，b，c，且，，则的值为 .10.在平面直角坐标系中，O为原点，A(-1，0)，B（0，），C(3，0)，动点D满足，则的最大值是 .11.已知函数，x=-为零点，x=为y=图像的对称轴，且在（，）上单调，则的最大值为（）A. 11B. 9C. 7D. 512.已知函数f(x)满足f(x+1)=若f(0)=2006，则f(2005)= .13.已知函数f(x)=2sin()图像的一个对称中心为（，）其中为常数，且，若对任意的实数x，总有f()f()，则的最小值是 .14.在ABC中，若-•=•-•，则ABC是（）A. 等边三角形B.锐角三角形C. 直角三角形D. 钝角三角形15.若a,b 是非零向量且满足（a-2b)⊥a，(b-2a)⊥b，则a与b的夹角θ的大小为 .16.若cos（α-β）=，cos2α=，并且α、β均为锐角且α<β，则α+β的值为 .17.在ABC中，AB=3，AC边上的中线BD=，•=5，则AC的长为 .18.在平行四边形ABCD中，AD=1，∠BAD=60°，E为CD的中点，若•=1，则AB的长为 .19. 在ABC内有一点O，且满足+2，则= .20.若M为ABC所在平面内一点，且满足（）•（）=0，则ABC 形状为（）A. 等腰三角形B.直角三角形C. 正三角形D. 等腰直角三角形21.已知A,B均为钝角，sinA=，sinB=，则A+B的值为 .22.若sinθ，cosθ是方程4的两根，则m的值为 .。
初中化学常见错题集(含解析)
初中化学错题集一、选择汇总例1.1 gH 2和10 gO 2在一密闭容器内混合点燃，充分反应后生成水的质量为（ ）A.1 gB.9 gC.11 gD.10 g[常见错误]由质量守恒定律知“参加化学反应的各种物质的质量总和与生成物的总质量相等”，1 g H 2和10 gO 2的质量总和为11 g ，选C 。
[错因分析]理解错误：充分反应与恰好完全反应混淆。
恰好完全反应是指各种反应物都正好用完，没有剩余；充分反应是指某一种物质已经反应完了，化学反应不能继续，而其他参与反应的物质还可能有剩余。
在化学反应中参加反应的各物质的质量要满足一个确定的质量比，并不是提供的各物质都一定能恰好完全反应，H 2与O 2反应时的质量比为1﹕8而不是1﹕10。
[教学对策]在一个化学反应中若有多种反应物，依据反应物的量求某种生成物的质量时，若提供多种反应物的数据而题目又没有说恰好完全反应时，此类题目往往有陷阱，可能有物质剩余，解题要小心。
解题时要根据化学方程式的量的意义，根据消耗完的物质的质量进行计算。
本题根据氢气燃烧的化学反应中的质量关系，1 gH 2只能和8 gO 2反应，而提供的10 gO 2并没有全部参加反应，还剩余2 gO 2，所以生成水的质量应该为9 g ，正确选项B 。
[变式练习]现有20 gH 2和O 2的混合气体在一密闭容器内引燃，充分反应后冷却至室温还有2 g 气体，则原混合气体中O 2 的质量是（ ）A.2 gB.16gC.18gD.16g 或18g答案D例2.经测定某物质中只含一种元素，该物质（ ）A.一定是纯净物B.一定是单质C.不可能是化合物D.不可能是纯净物[常见错误]单质是由一种元素组成的，一种元素组成的物质一定是单质，单质也一定是纯净物，选A 、B 或AB 。
[错因分析]记忆、理解错误：单质是由一种元素组成的纯净物，一种元素组成的物质不一定是纯净物，如：碳元素可以组成金刚石、石墨等多种物质，含一种元素的物质中可能有多种单质，它就属于混合物（即不是纯净物）；化合物是由不同种元素组成的纯净物，化合物中一定含有多种元素，一种元素组成的物质不可能是化合物。
六年级错题集（小作者整理）
错题集错题集1、 一根绳子3折量一口井，佘出1/3米；如果4折去量又不足1/4，求绳长，井深各多少米？，求绳长，井深各多少米？2、 小冬的爷爷参加运动会登山比赛，小冬的爷爷参加运动会登山比赛，上山时平均每分钟走上山时平均每分钟走30米，15分钟到山顶，分钟到山顶，然后用然后用20分钟沿原路下山，问上山、下山平均每分钟走多少米？路下山，问上山、下山平均每分钟走多少米？3、 一袋大米已吃了的和剩下的比是5：3，已经吃了这袋大米的，已经吃了这袋大米的 （ ）） 剩下的比吃了的少（剩下的比吃了的少（ ）%。
（ ）4、 有一个圆柱形水池，用一根长5米的竹竿竖直地插入水池中，在竹竿与水面的交接处标上记号A ，然后将竹竿倒过来，依照上述方法，再做记号B ，记号A 和B 之间的距离是竹竿长度的1/5，那么水池中水深多少米？水池中水深多少米？5、有两个完全相同的长方体恰好拼成一个正方体，有两个完全相同的长方体恰好拼成一个正方体，正方体的表面和是正方体的表面和是30平方厘米。
如果把这两个长方体改拼成一个大长方体，那么大长方体的表面积是（体改拼成一个大长方体，那么大长方体的表面积是（ ）平方厘米）平方厘米6、有一花坛，高0。
5米，底面是边长2.4米的正方形。
四周用砖砌成，厚度是0。
2米，中间填满土。
（1）花坛所占的空间有多大？（2）花坛里大约有多少立方米土？）花坛里大约有多少立方米土？7、小明看一本科普书，已看了全书的3/8，比余下的少36页，这本书一共多少页？页，这本书一共多少页？8、食堂有3吨大米，如果每天吃去1/14，（ ）天可以吃完。
）天可以吃完。
9、水结成冰后体积增加了1/9，冰融化成水后，体积减少（，冰融化成水后，体积减少（ ）10、体积是1立方米的正方体，可以截成（立方米的正方体，可以截成（ ）个棱长是1分米的正方体，这些正方体排成一行，成为一个长方体，这个长方体的长是（为一个长方体，这个长方体的长是（ ）11、一个长方体长16厘米，如果把它的长增加2厘米，那么表面积就增加30平方厘米。
作业错题集(全品)
第一章 有理数1、下列各数，3，-5，-21，0，2，0.97，-0.21，-6，9，32，85，1。
其中正数有 个，负数有 个，正分数有 个，负分数有 个。
2、下列说法错误的是（ ）A 负整数和负分数统称为负有理数B 正整数，负整数和0统称为整数C 正有理数和负有理数统称为有理数D 0是整数，但不是分数3、已知零件的标准直径是100mm ，超过标准直径的数量（mm ）记作正数，不足标准直径的数量（mm ）记作负数，检验员某次抽查了五件样品，检查结果如下：（1）试指出哪件样品的大小最符合要求？（2）如果规定误差的绝对值在0.18mm 之内是正品，误差的绝对值在0.18mm-0.22mm 之间是次品，误差的绝对值超过0.22mm 是废品，那么这五件样品分别属于哪类产品？4、下列运算：①（-18）÷（-9）=2；②（-7298）÷8=-（72+98）×81=-991 ③0.75÷（-585）=-43×458=-152 ④|-9|÷|-111|=9×11=99 其中运算正确的有（ ）A 1个B 2个C 3个D 4个5、计算题36÷7.2+(-48.6)÷2.4 （-1）×（-1）2×（-1）3×…×（-1）99×（-1）1006、观察下列等式：31=3，32=9，33=27，34=81，35=243，36=729，37=2187，…。
解答下列问题：3+32+33+34+…32016的末尾数字是（ ）7、-22÷34-[22-（1-21×31）]×12 331-22÷[（21）2-（-3+0.75）]×58、观察下列运算过程：S=1+3+32+33+…+32015+32016，①①×③，得3S=3+32+33+…+32015+32016+32017，②②-①，得2S=32017-1，S=32017-12运用上面的计算方法计算：1+5+52+53+…+520179、-392617×13 -24÷（232）2+521×（-61）-（0.5）210、若a 是整数，请比较a 2与a 的大小。
二年级数学上册错题集(一)
错题集（一）复习回顾一、填空二、我能辨对错。
1.袋子里有2个红球和1个白球，不可能摸到白球。
( )2.12是4的3倍，3是12的4倍。
( )3.在地图上，我们通常以上北、下南、左东、右西。
( )4.35÷7表示的意思就是把35平均分成7份求一份是多少。
( )5.把一块蛋糕平均切4刀，能分成4块。
三、选择题1.下面算式中，表示□是△的2倍的算式是第（）个。
A. □×△=2B. □×2=△C. □=△×22.21÷7=3表示（）A.把21平均分成7份，每份是3B.把21平均分成3份，每份是7C.7的3倍是多少3.下面不可能发生的事情是（）A.春夏秋冬季节交替B.太阳从西方升起C.人的生老病死D.岁月流逝4.从2、3、5、8、9中任意取两个数，两数的和（）大于10.A.一定B.不一定C.肯定不四、动手画一画1.画出下面立体图形从正面、正面右面上面右面、上面看到的图形。
2.根据所给时刻在钟面上画出时针和分针。
3时25分9时30分6时35分8时40分3.看图填空（1）小明从家往（）走（）站，又向（）走（）站到学校。
（2）从学校向（）走（）站，又向（）走（）站到少年宫。
（2）丁丁从学校向东走3站到家，用△标出他家的位置。
4.连一连。
五、列式计算1.8个6相加的和是多少？2.两个乘数都是8，积是多少？3.被除数是25，除数是6，商和余数各是多少？六、我会解决问题1.爸爸今年36岁，明明今年7岁，爸爸的年龄是明明的年龄的几倍还多几岁？2.小红有18块糖，小明有14块糖，小红给小明几块糖后，他俩的糖就同样多？3.一条绳子长16米，每2米剪成一根跳绳，可以剪成多少根这样的跳绳？需要剪几刀？4.有一些糖果，不到40块，平均分给5个孩子或7个孩子，都剩下2块，这些糖果共有多少块？5.体育课上，小华练习正步走，4分钟走了36步，照这样计算。
9分钟小华能走多少步？。
高考英语语法总复习错题集
高考英语语法总复习----错题集（一）1.It was 2 hours’ wait by the time the announcement _____, saying myflight was cancelled.A. had been madeB. madeC. was madeD. wasmaking2.She went on with her search, knocking on each door before entering theroom ____ the guest was perhaps asleep.A. in caseB. even ifC. so thatD.as though3.What made the parents worried most was that little Helen did nothingbut _____ all day long and always made a lot of trouble.A. to playB. playedC. playD. playing4.Those successful deaf dancers dancing is an activity _____ sightmatters more than hearing.A. whenB. whoseC. whichD. where5.Strawberries can, of course, be frozen but they taste best when boughtand eaten ____.A. freshlyB. freshC. more freshlyD. fresher6.–We did not see him at the lecture yesterday.-- You ____ him, since I went to an international conference with him.A. mustn’t have seenB. needn’t have seenC. couldn’t seeD.can’t have seen7.Venus has a dense atmosphere, _____ we know very little.A. its compositionB. about whose compositionC. about which compositionD. whose composition8.______ his capability in dealing with different kinds of people, hewas appointed chairman of the committee.A. Being consideredB. ConsideringC. To be consideredD.Having considered9.Operations which ____ patients exhausted and in need of long periodsof recovery time are now making them feel relaxed and comfortable.A. leaveB. had leftC. will leaveD. left10.With all the magazines I needed _____, I left the post office.A. boughtB. to buyC. buyingD. to bebought11.Most students in our class prefer taking pains in our studies to ____with a better education.A. equipB. equippingC. be equippedD. beingequipped12.I found that my cheating in yesterday’s English test _____ to myparents that very evening.A. was reportedB. had been reportedC. had reportedD. wasreporting13.The computers made by our company sell best, but several years agono one could have imagined the role in the markets that they ______.A. were playingB. were to playC. had playedD.played14.After supper she would sit down by the fire, sometimes for ____ anhour, thinking of her young and happy days.A. as long asB. as soon asC. as much asD.as many as15.With _____ left, it doesn’t seem likely that the young girl will beable to reach the airport ahead of schedule.A. so short timeB. such short a timeC. such a short timeD. so a short time16.Try to avoid such things ______will do you harm, unless you don’tcare about the rumors from all directions.A. thatB. asC. whichD. as that17.I glanced over my shoulder at the young woman who sat _____ me readinga newspaper.A. againstB. in front ofC. oppositeD.behind18.An old saying goes that no bread eaten by man is as sweet as _____earned by his own labor.A. oneB. thatC. itD. such19.I’d like to take down your name and address in case you _____ as awitness.A. will be neededB. needC. are neededD.will need20.The number of the people present at the party was ____ than expected,so there was much food left.A. much moreB. much smallerC. much largerD. manymore21.His grandfather was born and brought up in _____is now called aneconomic development zone.A. whatB. whereC. whichD. that22.If a computer breaks down, you will lose the file you ____ if you don’tsave it regularly.A. are processingB. processC. will processD.processed23.Parents who stay actively ___ with their children, showing interestin their activities and participating when possible, earn the respect and appreciation of their children.A. involveB. involvingC. to involveD.involved24.Indeed the best leading actor has read a lot of books, but the bestsupporting actress has read no _____.A. moreB. fewC. lessD. little25.Although the causes of cancer _____, we do not yet have any practicalway to prevent it.A. are being uncoveredB. have been uncoveringC. are uncoveringD. have uncovered26.The newly concluded National People’s Congress has passed a packageof economic policies _____ 8% of yearly economic growth.A. targetB. to targetC. targetingD. targeted27.Hardly _____ aware that the lion was approaching her before her dogbegan to bark.A. she wasB. would sheC. would she beD. was she28.Students’complaints ____ too much study burden were soon taken intoconsideration by the school.A. ofB. forC. inD. with29.The man had expected to see all his relatives when in hospital, but____ came to see him while many of his friends offered him their help.A. noneB. no oneC. someoneD. anyone30.There _____ be any difficulty in passing the oral test since you havepracticed a lot in the school.A. mustn’tB. shan’tC. shouldn’tD.needn’t31.Besides the Internet, television is anther major way of communication____ us to see the performer as well as to hear the voice.A. permittingB. to permitC. being permittedD.permitted32._____ two tickets for the new play at the Grand Theater on Saturday.Shall we go and enjoy it together?A. They have been givenB. I have been givenC. I am givenD. They have given to me33.After a long journey across the whole Europe from north to south, theyfound themselves ___ out as well as their clothes.A. wearB. woreC. wearingD. worn34.The hostess dressed in her finest costume together with the guests____ comfortably in the living room.A. was seatedB. was seatingC. were seatedD.seated35.Even if you offered ____ you have just offered, I would not sell itto you.A. the money twice thatB. twice whatC. twice the money whatD. twice as much36.Investigators agreed that passengers on the airliner ____ at the verymoment of the crash.A. ought to dieB. must have diedC. must be dyingD.should have died37.He introduced a lot of new devices, ____ much time and labor.A. only to saveB. thus savingC. only savingD.having saved38.Motorists used ____ to the radio or their favorite tunes on CDs mayhave a new way to entain themselves, after engineers in Japan developeda musical road surface.A. to listenB. to listeningC. for listeningD. to belistening39.A walk through the rainforest is not ecotourism ____ that particularwalk somehow benefits that environment and the people who live there.A. ifB. thoughC. unlessD. as40.Throughout the history of the Olympic Games, ordinary men and womenhave showed extraordinary sportsmanship, _____ it is an athlete helping to fix the bicycle of his opponent or two athletes from warring nations walking arm-in-arm before the world.A. no matterB. whetherC. provided thatD. whatever41.The study you have been making ____ the ancient Chinese charactersis an instructive job.A. toB. forC. ofD. from42.Yassin’s death was not ____ to stop Hamas’ attempt _____ terrorattack.A. hoped, carrying onB. expected, launchingC. hoped, to carry onD. expected, to launch43.What is the way George thought of ____ enough money to buy the house?A. to getB. gettingC. having gotD.being got44._____ waking from a dream, Silicon Valley has suddenly realized thatthe ____ economy means trouble for his companies.A. Although, collapsingB. As if, collapsedC. Although, collapsedD. As if, collapsing45.The man showed us such a heavy stone ____ no man could lift.A. thatB. asC. whichD. and46.The professor can hardly find sufficient grounds ____ his argument.A. which to be based onB. on which to baseC. which to be basedD. which to base47.The women carrying babies, come in first, _____?A. will youB. will theyC. do youD. don’t you48.Pleasant music is often played ____ classes to make students refreshedand relaxed for a while.A. betweenB. amongC. overD. after49.When you have finished reading the novel, you will find the hero ____.A. a person too perfect to be not trueB. a too perfect person tobe trueC. too perfect a person to be trueD. too perfect a person tobe not true50.When I entered the living room, Mother didn’t say anything, but Inoticed a _____look come over her face.A. surpriseB. surprisedC. surprisingD.surprisingly51.Having lived in the village for so long, these young men have alreadygone _____.A. to nativesB. nativeC. nativelyD. natives52.There is hardly an environment on earth ____ some species of animalor other has not adapted successfully.A. to whichB. whereverC. so thatD. that53.____ at the news that he sank into the chair and remained motionlessfor several minutes before regaining control of himself.A. So was John scaredB. So scared was JohnC. So much did John scareD. John scared so much54.Our neighbor ____ the street has decided to hold a garden party despitecold weather.A. acrossB. oppositeC. alongD. in55.Until the very latest moment of his existence, man has been bound tothe planet ___ he originated and developed.A. on whichB. whatC. in whichD. in what56.They have started an investigation, ____ are being kept secret.A. the detail of whichB. of which the detailsC. and the detailD. the details of it57.I got in his old truck and off ____ to one of the far corners of thefarm to fix the fences.A. did we goB. we wentC. we did goD. went we58.I was the middle child of three, and there was a gap of five yearson ____ side.A. oneB. eitherC. bothD. none59.The most common way we have of showing other people ____ are moreimportant is by making ourselves smaller than they are.A. whoB. /C. thatD. they60.–Shall I get you something from the supermarket?-- Oh, let me see, ____ please.A. food of a week worthB. food of a week’s worthC. a week worth foodD. a week’s worth of food61.Now that energy prices are rising so rapidly, further prices are muchuncertain, and the risk ____ a new investment depending on them may fail is greater.A. by whichB. ofC. thatD. in that62.Until last century _____ heard of online education.A. many Americans had neverB. had many Americans neverC. many Americans hadD. had many Americans63.Discovery in a South African cave suggests that modern human behavior____ much earlier than ____.A. begin, previously thoughtB. began, previously thoughtC. should begin, previously thinkingD. began, previouslythinking64.____ think of their plan, no one can deny that they are bold and havemuch imagination.A. Whatever we mayB. No matter how we mayC. Much as we mayD. If we may65.How can a country where teachers devote all their class hours totraining students to take exams _____ to compete in the technology race with other countries?A. expectB. expectingC. being expectedD. beexpected66.All women want to escape from the kitchen, ____ the limited place ___society expects them to fill.A. which, thatB. /, whereC. where, whichD. /, /67. The old man was sitting in a wheelchair all day because his brokenleg suffered after a fall made ____ difficult.A. it walkB. to walkC. walkingD. it towalk68. The new Hukou(户口)policy, according to some experts, ____ to attractmore high-end talents to contribute to Shanghai’s development.A. servesB. servingC. to serveD. is served69. Electrolysis(电解)is the process _____ electric current is passedthrough a substance to cause a chemical change.A. whichB. whoseC. to whichD. by which70. The Apple Company had scarcely released i-Phone ____ it became oneof the best-selling electronic products.A. thanB. beforeC. whileD. when71. He no longer lives on campus, for he ____ an apartment within thewalking distance to the school.A. will rentB. rentedC. has rentedD. hadrented72. With his good sense of direction, he _____ quickly and easily getround in the new city.A. canB. mustC. shouldD. need73. An excellent way to help memory is to connect information withpictures, which ____ as a memory-link method.A. considersB. is consideringC. is consideredD.considered74. The airline has a booklet ____ will tell you most of the importantinformation to Europe.A. in whichB. about whichC. /D. that75. Several weeks had gone by ____ the head of the gallery realized thepainting was missing.A. afterB. beforeC. sinceD. that （一）答案1-5 CACDB 6-10 DBBDA 11-15 CABAC 16-20 BDBCB 21-25 AADCA26-30 CDAAC 31-35 ABDAB 36-40 BBBCB 41-45 CDADB 46-50 BAACB 51-55 BABAA 56-60 BBBDD 61-65 CABAD 66-70 DCADD 71-75 CACDB。
五年级错题集
第一单元小数乘法【错题1】【错误做法】0.72×5=36【成因分析】部分学生对小数乘法计算不熟悉【解决对策】理解计算法则.多练习。
【正确做法】【错题2】一块正方形塑料板,边长是1.5米,它的面积各是多少?【错误做法】1.5×1.5=22.5【成因分析】面积计算小数位数错误【解决对策】复习正方形周长和面积，正确计算。
【正确做法】1.5×1.5=2.25【错题3】在地球上1千克的物体到月球上约重0.16千克。
在地球李老师的体重是65千克如果在月球上大约重多少千克？【错误做法】65×0.16=104【成因分析】部分学生题意不理解不能例式【解决对策】理解题意.正确列式。
【正确做法】65×0.16=10.4【错题4】4 1.5×105【错误做法】 1.5×105=1.5×(10+5)=1.5×10+5=15+5=20【成因分析】学生对乘法运算定律不理解不能灵活运用【解决对策】理解运算定律多练习。
【正确做法】 1.5×105=1.5×(10+5)=1.5×10+1.5×5=15+7.5=22.5【错题】【错误做法】【成因分析】不够理解计算运算顺序。
【解决对策】多练习。
【正确做法】56×1.3=72.8（千米/时）第二单元 小数除法【错题】5 0.98÷0.2 【错误做法】【成因分析】学生不能分析题目数据，不能灵活运用运算定律 【解决对策】理解题目和运算定律多练习。
【正确做法】【错题】6 84÷15 【错误做法】 84÷15=36【成因分析】整数除以整数商是小数不会【解决对策】根据小数的性质在整数后点上小数点加上0做 【正确做法】84÷15=3.6【错题7】 62.5÷25 0.81÷27【错误做法】62.5÷25=25 0.81÷27=0.3【成因分析】小数除以整数商是小数不够熟练，商的小数点漏掉 【解决对策】多练习养成良好的计算习惯【正确做法】 62.5÷25=2.5 0.81÷27=0.03【错题8】 3.9÷1.5 【错误做法】 3.9÷1.5=26【成因分析】小数除以小数计算法则学生不够熟练运用 【解决对策】理解法则正确计算 【正确做法】3.9÷1.5=2.6【错题9】 22.3÷99【错误做法】 22.3÷99=0.22525……【成因分析】用循环小数表示不够熟练循环节找不出【解决对策】多练习用循环小数表示数。
完整word版-初三上学期数学错题集(一二)及答案
初三上学期数学错题集（一元二次方程）（一） 2012.09.09已打印1、若方程（m-2）x㎡-2+mx2=7是关于x的一元二次方程，则m的值为。
2、根据题意，列出方程：（不必求解，写出一般形式）学校图书馆去年年底有图书5万册，预计到明年年底增加到7.2万册，求这两年的平均增长率。
3、方程x2=0的实数根有（）A．0个B．1个C．2个D．1个或2个4、下列二次三项式中，是完全平方式的是（填序号）。
①9x2-12xy+4y2；②4y2-4y-1；③x2-25x+5；④2x2-4x+1；5、写出一个一元二次方程，使它的两根：一根是正数，另一根在-2与-1之间。
6、方程（x-2）(x+3)=6的解是（）A．x1=-4,x2=3 B．x1=2,x2=3C．x1=2,x2=-3 D．x1=4,x2=-37、用因式分解法解方程5（x+3)-2x（x+3)=0，可把它化为两个一元一次方程、求解。
初三上学期数学错题集（一元二次方程）（二）2012.09.15已打印1、解方程：（1）3y(y-1)2=2-2y （2）7 x2=21x （3）（x2+1）2-3(x2+1)-28=02、若△ABC的边长都是方程x2-10x+21=0的根，求△ABC的周长。
3、若△ABC 的边长都是方程x 2-7x+12=0的根，求△ABC 的周长。
4、已知P=157m-1,Q= m 2-158m(m 为任意实数)，则P 、Q 的大小关系为 （ ） A ．P<Q B. P=Q C. P>Q D.不能确定 5、关于x 的方程（k+1）x 2+2(k+1) x+k=0无实数根，则k 的取值范围是 。
6、已知a 是整数，满足⎩⎨⎧>->+023013a a 试解关于x 的一元二次方程x 2-4=x(ax-3).7、k 为何值时，关于x 的方程（k-1）x 2-(2k+1) x+k+1 = 0（1）有一解？（2）有两个不相等的实数根？8、已知△ABC 的两边AB 、AC 的长是关于x 的一元二次方程x 2-(2k+1) x+k(k+1) = 0的两个实数根，第三边BC 的长为5.（1）k 为何值时，△ABC 是以BC 为斜边的直角三角形？（2）k 为何值时，△ABC 是等腰三角形？并求△ABC 的边长。
四年级数学上册错题集
第一单元《升和毫升》题目1：填空：把4升水倒入500毫升的量杯，可以倒杯。
错因：用4000除以500，学生计算有难度。
题目2：一瓶果汁有250毫升，()瓶这样的果汁正好是2升。
一瓶酱油有500毫升，()瓶这样的果汁正好是3升。
错因：学生审题不够仔细，把后边的3升和2升都习惯性的当成1升。
题目3:1L=()ml2/4L=()ml1/4L=()ml3/4L=()ml错因：学生不能正确的理解1/4L的含义。
就是要把1升平均分成4份，其中的一份，最好是能用瓶子动手做一做。
［返回目录］第二单元：《两、三位数除以两位数》》题目1：一节火车车厢限载60吨货物。
要运走500吨货物，至少需要多少节这样的车厢？错因：学生会把余数写错。
题目2：做一个中国结要用60厘米丝带。
小星买了长400厘米的丝带，最多可以做多少个这样的中国结？错因：学生会把余数上少写一个0。
题目3：手工小组的同学一共制作了280面小红旗、150面小黄旗和110面小绿旗。
如果每班要分30面，这些小彩旗一共可以分给多少个班？错因：有些学生没有先求彩旗的总数，而是分别去除以30，有余数。
题目4：小芳读一本182页的故事书，已经读了40页。
剩下的每天读30页，至少还需要多少天才能读完？错因：最后的结果要采用“进一法”。
题目5：选择合适的条件解答。
六年级4个班举行跳绳比赛，每班派2组选手参加，一共有120名选手。
六年级一共有多少组选手？（）平均每班有多少人？（）错因：多数学生会定势在求每组有多少人上。
题目6：选择合适的条件解答。
720个零件装了30箱，每箱有6盒。
平均每箱有多少个零件？一共有多少盒零件？错因：学生不能正确的找到解决问题的条件。
题目7：根据乘法算式，在括号里写出每道除法算式应该商几？41"=287 52*8=416300+41=()430+52=()283+41=()403+52=()错因：学生不能理解题意，且不会转化，应把上面的乘法算式转化成除法，比较容易理解。
小升初奥数错题集(一)
1.百货公司卖出肥皂、香皂共480箱。
已知卖出的肥皂比香皂多3倍。
卖出的肥皂、香皂各多少箱？2.两块同样长的衣料，第一块用去4米，第二块用去10米，剩下的衣料，第一块是第二块的3倍，原来两块衣料共有多少米？3.有两袋大米，若从第一袋取出9千克放入第二袋中，两袋重量想等，若从第一袋取出12千克放入第一袋里，则第一袋大米的重量是第二袋的2倍，原来每袋大米各有多少千克？4.把324分成四个数，使甲加上2，乙减去2，丙乘以2，丁除以2，四个数相同，求这四个数。
5.某数的8倍减153，则比其5倍多66，求某数。
6.老师给幼儿园的小朋友分苹果，如果每位小朋友分2个，还多30个；如果其中的12位小朋友分3个，剩下的每人分4个，正好分完。
一共有几位小朋友，有几个苹果？7.甲对乙说：“如果你给我100元，我的钱是你的3倍。
”乙对甲说：“如果你给我10元，我的钱是你的7倍。
”甲、乙两人原有钱多少元？8.五年级两个班原有图书的本数一样多，后来一班又买来97本新书，二班取出83本书送给农村小朋友，这时一班图书是二班的3倍，两个班原来有图书各多少本？9.某校有男生630人，选出男生人数的三分之一和女生人数的四分之三去排练团体操，剩下的男生人数是女生人数的2倍。
这个学校共有学生多少人？10.三种水果共132个，已知苹果的个数比梨的3倍少6个，梨的个数比桔子的3倍多2个，三种水果各有多少个？11.甲仓库存粮比乙仓库多300吨，比丙仓库少100吨，乙、丙仓库共存粮3000吨。
三个仓库共存粮多少吨？12.五年级三个班，如果把一班1名学生调到二班，则两班人数相等，如果把二班1名学生调到三班，则三班比二班多2人，一班和三班比，哪班人数多？多几人？13.今年哥哥16岁，弟弟比哥哥小3岁，多少年后兄弟两人年龄的和为45岁？那时哥哥和弟弟各几岁？14.小乐乐今年5岁，爸爸34岁，妈妈30岁，多少年后，爸爸妈妈年龄的和是小乐乐的4倍？15.甲、乙带着相同的钱去买大米，甲的钱不够，向乙借了8元，买了15千克大米，乙剩的钱刚好买10千克大米。
三年级语文错题集
三年级语文错题集
一、近义词、反义词
保卫——守卫（保护）威武——威风（英明神武）一本正经——嘻皮笑脸清脆——嘶哑寂静——喧嚣激动——兴奋忙碌——闲暇仇恨——热爱注视——凝视机灵——灵活愿望——心愿环绕——围绕宽阔——宽敞、宽广悠荡——飘荡议论纷纷——众说纷纭动摇——坚定许多——稀少习俗——风俗疑惑——疑虑优惠——便宜欢喜——欢快成果——成就绝妙——奇妙
二、容易写错的字
慌张区域冰冷富裕船舱柳树拒绝
三、拼音易错的字
揪（jiu ）腔（qiang ）欺负（）孔（）恐惧（）紧（）逮（）住堵塞（）眨（）眼规矩（）侮（）辱命令（）
四、组词易错的字
叙（）迁（）曹（）骄（）帖（）
带反义字的成语
三长两短转危为安今非昔比化敌为友转优为喜长话短说东张西望大材小用左顾右盼小题大做四面八方五颜六色五光十色七上八下
带“新”字的：喜新厌旧新陈代谢焕然一新
带“春”字的：妙手回春满园春色春暖花开春意盎然
带“快”字的：快马加鞭快人快语大快人心
带“乐”字的：乐不可支乐不思蜀其乐融融
带“鸟”字的：惊弓之鸟鸟尽弓藏鸟语花香
带“海”字的：海枯石烂海底捞月海誓山盟情深似海海底捞针。
五年级数学上册错题集一
五年级上册错题集（一）1. 若小红向东走100米，记作—100，则小强向西走120米，记作（）2.如果乌龟0处先向东爬行4格，又向西爬行7格，这时乌龟的位置应记作（）米。
3.一栋大楼，地面以上有20层，地面以下有3层。
地面以上的楼层记作正数，大楼每层高3米。
（1）—2层表示什么意思？（2）坐电梯从+2层到—3层，电梯下降了多上米？4.如下图，用竹篱笆围成一个梯形养鸡场，场地的一边利用房屋的篱笆，篱笆的总长度是95米，这个养鸡场占地多少平方米？5.一块梯形菜地的上底长300米，下底长500米，高50米，这块菜地的面积是（）①4公顷②2公顷③4平方米6.一位足球守门员练习折返跑，从守门位置出发，向前跑记作正数，向后跑记作负数，它的练习记录如下：（单位：米）+7 —3 +11 —8 —5 +12 —10守门员离开守门位置最远是（）7.一个三位小数“四舍五入”后是8.20，这个数最小是（），最大是（）8.一个小数的千分位“五入”后是5.85，这个数精确到十分位是（）。
① 5.8 ②5.9 ③6.09.马小虎在读一个小数时，忘读小数点了，把这个小数读成了二十万零五十七。
如果这个小数只能读一个“零”，那么原来的小数是多少？如果可以读出两个“零”呢？10.判断题，一个减法算式中，被减数比减数多10.01，比差0.9，那么被减数是10.91.（）11.填上合适的单位，故宫的面积大约是72 （）12.把497500000改写成用“万”作单位的数是（），用“亿”作单位且保留一位小数约是（）13.把两根同样长的铁丝分别围成正方形和平行四边形，比较他们的面积（）①正方形的大②平行四边形的大③一样大④无法比较哪个大14.计算阴影部分面积15.在自行车40米慢骑比赛中，李萍骑了2.24分钟，王媛骑了2.15分钟，陈华骑了1.95分钟，赵颖骑了2.20分钟。
四人中谁是第一名？比第四名慢多少分钟？16.丽丽给妹妹3.55元钱后，妹妹还比她少0.35元。
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三年级下册数学错题集一
一.填空
1.2100年是（）年，二月有（）天，全年有（）天。
2.李老师的生日比劳动节早两天，李老师（）月（）日过生日。
3.晚上12时18分是（）时（）分 6时45分是（）时（）分 103公里－94千米 = （）米
4.今天是2012年1月19日，小红前天过的生日，小红的生日是（）月（）日。
5.中华人民共和国是（）年（）月（）日成立的，到成立一百周年时是（）年，这一年我都（）岁了。
6.任何数和0相乘的积都是（），0除以（）的数都得0。
7.某年的9月份有5个星期日，这一年的9月1日不是星期日，这一天是星期（）。
8. 25与45的和，再乘12，算式是（），结果是（）。
9.学校7月5日放假，到9月1日开学，假期共（）天。
10. 一个长方形的长和宽各缩小4倍，面积缩小（）倍。
11.把1米平均分成10份，每份是（）分米，写成分数是（）米，写成小数是（）米。
8分米=（）米
13.0.3里面有( )个0.1 40平方米=（）平方分米 4平方分米=( )平方厘米
14.大于4而小于5，并且小数部分是一位小数的有（）个。
15.一个长方形的长增加3厘米，宽减少3厘米，它的周长（）。
16.把1米长的线段平均分成10份，每份是（），用小数表示是（）米；5份是（），用小数表示是（）米。
17. 3厘米=（）分米=（）米 8分米=（）厘米=（）米 4角=（）元=（）元。
5分=（）角=（）元 2元5角的冰红茶价格为（）元。
18.计算小数加法时应把（）对齐，也就是（）对齐。
19.下面的小数部分各在哪两个相邻的整数之间。
（）＜1.5＜（）（）＜0.4 ＜（）（）＜5.9＜（）（）＜85.9＜（）
二.判断题
1.一个三位数除以一个一位数，商不可能是一位数。
（）
2.在0.9里面，没有整数部分，只有小数部分。
（）
3.周长相等的两个正方形，它们的面积一定相等。
（）
4.边长是4厘米的正方形，周长和面积相等。
（）
5.424÷6商是2位数。
（）
三.我知道每个人的生日： 2009年10月1日星期四
王利：我在国庆节前一星期过生日。
王利（）刘婷：国庆节过后3天就是我的生日。
刘婷（）小亮4月14生日，小刚比小亮大15天，小刚的生日是：（）月（）日
四.应用题
1.美术学院有一个两层的展览馆，每层有4个展厅。
在展厅里一共放了240副画，平均每个展厅放多少副画？
2.动物园有3只大象，每天吃1620千克食物，1只熊猫5天吃120千克食物。
一只大象比一只熊猫每天多吃多少千克？
3.小明的爸爸出差5天，这5天的日期之和是35。
爸爸是在第5天回到家的，请你算一算爸爸回家这天是几号？
4.李师傅8：00上班，下午5：30下班。
中午休息1：30小时。
没小时加工35个零件，一天一共加工多少零件？
5.三年级同学站队做操，男生站7行，每行24人；男生是女生的两倍。
女生有多少人？
6.李老师和王老师带39名同学去太湖公园游玩而，500元买门票够吗？（票价：成人：15元，儿童：11元）。