十册第四单元试卷
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2024-2025学年三年级上册语文单元测试卷第四单元注意事项:1.同学们,答题前请注意填写好自己的姓名、班级、考号等信息。
2.请将答案正确填写在答题卡上。
3.答完试卷后,务必再次仔细认真检查哦!第一部分:积累运用(49分)一、拼音乐园。
(11分)1.给下列加点字选择正确的读音,填在括号里。
(6分)yā yàdāndàndàntán压倒()担子()弹琴()压根儿()担负()子弹()2.看拼音,写字词。
(5分)(1)老屋的门板破了几个dònɡ,qiánɡ bì也裂开了,到处都是zhī zhū网。
(2)它织了一张又大又piào liɑnɡ的网,经常有虫子zhuànɡ到网上。
二、选择题。
下列每小题都有四个备选答案,我能按题目要求选择一个正确的答案,把字母填在“( )”里。
(14分)1.下列选项中加点字的读音完全相同的一项是( )A.假期 放假 假冒B.中等 中途 中弹C.处罚 处理 独处D.几乎 茶几 几个2.下列词语中,带点字注音错误的一项是( )A.发愁(chóu) B.晾晒(liàng) C.发怒(nù)D.萝卜(bō)3.下列词语中,有错别字的是( )A.百发百中B.模访C.批评D.饥饿4.与“窿”字读音相同或相近的一项是( )A.窗B.隆C.陌D.穹5.下列词语中,不是一对近义词的一组是( )A.同情——怜悯 B.伤心——难过C.容易——简单 D.偶尔——经常6.下列句子中标点符号使用不正确的一项是( )A.“我觉得很难。
”小狗对小公鸡说道。
B.“哎呀!”狐狸说道:“原来是这样!你这是给我设了一个圈套啊!”C.小狗真高兴,心想:我终于会叫了,现在别人再也不能取笑我了。
D.孙中山笑了笑,说:“学问学问,不懂就要问。
”7.关于“预测”,以下说法中不正确的是哪一项?( )A.有时从标题可以猜测书的大致内容。
学校: 班级: 姓名: 学号:2024-2025学年第一学期二年级第四单元考试试题语 文(基础卷)题号 一二三四五六总分得分注意事项:1.本试卷(基础卷)分为三个部分,六道大题,考试时间60分钟,总分100分。
2.答卷前,考生务必将自己的班级、姓名、学校填写在本试卷密封线内相应的位置。
3.答卷时,请在试卷对应题目要求上作答,不要在试卷上做任何标记,也不要在密封线内答题。
4.请用铅笔在试卷上作答,如需改动,用橡皮擦干净后,再重新作答。
字迹要清晰,卷面要整洁。
5.考试结束后,本试卷与答题纸(如有)一并收回。
第一部分:基础·积累·运用(共78分)一、按题目要求题目。
(本大题共4小题,其中第2小题每字1分;第4小题每小题2分;共29分) 1.请将正确答案的选项填写在括号里。
(本题共2小题,每小题1分,共4分) (1)下面每题中,选择出加点字注音正确的选项。
( )① A.瀑.布(p ù) B.风景.(j ǐn) C.爱好.(h ǎo) D.形状.(zh àn ɡ) ( )② A.水分.(f ēn) B.隐约.(y ùe) C.尤.其(y óu) D.首都.(do ū) (2)下面每题中,选择出含有错别字的选项。
( )① A.树枝 B.挂面 C.山披 D.部位 ( )② A.围绕 B.形壮 C.生产 D.遥远 2.看拼音写汉字。
(本小题每字1分,共10分)sh èn ɡ l ì zh ǎn xi àn ch én ɡ sh ì m ín ɡ sh èn ɡ ɡǔ j ì3.选字填空。
(填序号)(本题共2小题,每空1分,共9分)①是 ②式 ③市 ④试 ⑤室(1)二年级(9)班的教( )里,正在进行数学考( ),张红( )一个细心的孩子,她对每一个算( )都认真检查,因为成绩优异,去年地还被评为了( )级三好学生。
第四单元知识检测卷(附答案解析)36×28 48×29 51×25 73×142.连一连。
3.下面的计算对吗?不对请改正。
(1)(2)4.这本书一共有多少行?5.(1)燕子25秒能飞行多少米?(2)猎豹18秒能跑完600米吗?6.爸爸坐火车从武汉到北京,火车平均每小时行87千米。
武汉到北京的路程是多少千米?参考答案1.1008 1392 1275 10222.略3.(1)× 432 (2)× 8504.76×22=1672(行)5.(1)47×25=1175(米)(2)34×18=612(米)能6.24时-20时55分+8时55分=12(小时)87×12=1044(千米)《两位数乘两位数(进位)》达标检测(2)1.算一算。
2.列竖式计算。
46×15 32×26 75×23 38×453.下面的计算正确吗?把错误的改正过来。
改正:改正:4.新华书店本周卖出33本精装版《新华字典》,25本简装版《新华字典》。
精装版每本48元,简装版每本27元。
(1)两种版本各卖了多少钱?(2)本周新华书店的《新华字典》共卖了多少钱?5.李阿姨带650元去缴物业管理费,发现物业管理费比去年每月50元增加了。
她缴了12个月后,钱还剩了些。
(1)今年每月物业费可能是多少元?(2)如果今年物业管理费每月是54元,那么李阿姨还剩多少钱?6.巧解算式谜。
参考答案1. 414 900 832 竖式略2. 690 832 1725 1710 竖式略3. ××4.(1)精装版:48×33=1584(元)简装版:27×25=675(元)(2)1584+675=2259(元)5.(1)51×12=612(元)52×12=624(元)53×12=636(元)54×12=648(元)可能是51元或52元或53元或54元(2)650-648=2(元)6.第四单元知识点检测卷(包含答案)一、填空题。
二年级上册语文第四单元测试卷【含答案】专业课原理概述部分一、选择题(每题1分,共5分)1. 下列哪个字是本单元中出现的生字?A. 桃B. 杏C. 梨D. 橙2. 《小蝌蚪找妈妈》一文中,小蝌蚪最终找到了谁?A. 青蛙妈妈B. 鸟妈妈C. 鱼妈妈D. 虫妈妈3. 下列哪个词是表示动作的词?A. 快乐B. 跑步C. 红色D. 温暖4. 《植物妈妈有办法》一文中,植物妈妈是通过什么方式传播种子的?A. 风力B. 动物C. 水力D. 火力5. 下列哪个句子是正确的?A. 我今天去公园玩。
B. 我今天去公园玩了。
C. 我今天去公园玩了玩。
D. 我今天去公园玩了玩了。
二、判断题(每题1分,共5分)1. 《曹冲称象》一文中的曹冲是个聪明的小孩。
()2. “爱护”的“护”字是左右结构。
()3. “ABB”式词语是指第二个和第三个字相同的词语。
()4. 《植物妈妈有办法》一文中,植物妈妈是通过风力传播种子的。
()5. “比喻”是一种修辞手法。
()三、填空题(每题1分,共5分)1. 《曹冲称象》一文中的曹冲是个____的小孩。
2. “爱护”的“护”字是____结构。
3. “ABB”式词语是指第二个和第三个字相同的____。
4. 《植物妈妈有办法》一文中,植物妈妈是通过____传播种子的。
5. “比喻”是一种____手法。
四、简答题(每题2分,共10分)1. 请简述《曹冲称象》一文的主要内容。
2. 请举例说明“ABB”式词语。
3. 请简述《植物妈妈有办法》一文中,植物妈妈是通过什么方式传播种子的。
4. 请简述比喻的定义和作用。
5. 请简述“爱护”的“护”字的笔画顺序。
五、应用题(每题2分,共10分)1. 请用“爱护”造句。
2. 请用“ABB”式词语造句。
3. 请用比喻句描述一下秋天的景色。
4. 请用“风力”造句。
5. 请用“聪明”造句。
六、分析题(每题5分,共10分)1. 请分析《曹冲称象》一文中,曹冲称象的方法和原理。
第四单元《百分数》单元测试试卷2022—2023北师大版六年级上册(含答案)一、填空题1. 比10吨多25%是_____吨;比10米少米是______米.2. 六(1)班50人,今天的出勤率是96%,六(1)班今天缺勤( )人。
3. 把37.5%的百分号去掉,这个百分数就会扩大到原来的( )倍。
4. 一种商品八折优惠是120元,那么九折优惠是( )元。
5. 在0.636、711、64%、0.6中,其中最大的数是( ),最小的数是( )。
6. 18÷__________=34=()16=__________%=___________(填小数)。
7. 在0.3、0.333、33%、13这四个数中,最小的数是_____,最大的数是_____。
8. 比60吨少它的23是( )吨;60吨约是90吨的( )%。
9. 六年级有250人,今天有246人到校﹐出勤率是( )%。
10. 小丽和小明读相同的课外读物,小丽已经读了这本课外读物的55%,还剩下90页没有读,这本课外读物一共有( )页,小明已经读了这本课外读物的70%,他已经读了( )页。
二、选择题11. 下列各数与0.8相等的是()。
A.45B.8% C.0.60 D.0.8%12. 王玲从网上下载一部动画片,下图表示的是下载进度.阴影部分表示已经下载的部分,已经下载的部分大约是( ).A.25% B.50% C.75% D.90%13. 40人相当于80人的百分之几?正确的解答是()A.75% B.120% C.25% D.50%14. 今年产量比去年增产5%,今年产量相当于去年的()。
A.105% B.5% C.95%15. 在2.7的后面加上百分号,和原数相比,这个数就( ).A .缩小到原来的110 B .缩小到原来的1100 C .扩大了10倍 D .扩大了100倍 16. 小明家六月份用电180度,开展节约用电后,七月份用电120度,比六月份用电节约了百分之几?正确的列式为( ).A .120÷180×100%B .(180-120)÷180×100%C .180÷120×100%D .(180-120)÷120×100%三、判断题17. 1吨煤用去85%,还剩下15%吨. ( )18. “三成”就是十分之三,改写成百分数是3%。
单元素养评估(四)(第四单元)(60分钟90分)一、选择题:本大题共25小题,每小题2分,共50分。
在每小题给出的四个选项中,只有一项是符合题目要求的。
1.建安元年,曹操在许下招募民众屯田,耕种那些因为人民流亡而荒芜的土地,结果“得谷百万斛”,于是推广到其他地区,“仓廪皆满”。
这表明曹操的屯田(A)A.有助于恢复经济发展B.促进南方地区的开发C.帮助曹操完成了统一D.提高了粮食的亩产量2.歇后语往往蕴含着历史典故。
下列歇后语和“曹操遇蒋干——倒了大霉”中的典故发生在同一时期的是(C)A.楚王戏晏子——自讨没趣B.孔夫子拜师——不耻下问C.周瑜打黄盖——两厢情愿D.司马昭之心——路人皆知3.下表是关于赤壁之战的记述,由此可知(B)公(曹操)至赤壁,与备战,不利。
于是大疫,吏士多死者,乃引军《三国志》还。
备遂有荆州、江南诸郡(周瑜)进,与操遇于赤壁。
时操军众已有疾疫,初一交战,操军《资治通鉴》不利,引次江北A.赤壁之战导致疾疫蔓延B.疾疫暴发影响赤壁之战战局C.疫病流行加剧军阀混战D.曹操借瘟疫推卸战败的责任4.(2023•广州海珠期末)诸葛亮在《隆中对》中指出:“今操已拥百万之众,挟天子而令诸侯,此诚不可与争锋。
孙权据有江东,已历三世……此可以为援而不可图也……将军……若跨有荆、益……外结好孙权,内修政理……则霸业可成,汉室可兴矣。
”下列能够证明其策略正确性的是(A)A.三国鼎立局面的形成B.西晋的统一C.东晋十六国的对峙D.南北朝并立5.如表是《三国时期领土及人口统计表》国家领土户数人口数兵士幽州、冀州、青州、并州、徐州、魏国66万户443万人估计40万人以上兖州、豫州、司州、雍州、凉州蜀国益州28万户94万人10.2万人吴国扬州、荆州、交州52.3万户 230万人23万人(注:三国时代在政府管理之外还存在大量的流民,实际人口应该多于统计数字)据此可知(D)A.三国鼎立局面正式形成B.统计数据不准确没有参考价值C.曹魏政权重视农业发展D.三国当中魏国政权的实力最强6.(2023秋·深圳光明期末)曹操在诗句中描写了“白骨露于野,千里无鸡鸣”的社会状况,而到了曹魏时期,社会出现“农官兵田,鸡犬之声,阡陌相属”的情景,这说明三国时期 (D)A.民族关系实现缓和B.江南地区获得开发C.诗词创作取得进步D.社会经济有所恢复7.“(咸宁五年)十一月,大举伐吴。
小学上册英语第四单元真题试卷英语试题一、综合题(本题有100小题,每小题1分,共100分.每小题不选、错误,均不给分)1.The __________ (历史的研究) uncovers hidden narratives.2. A sound can be produced by vibrating ______.3.The Earth's crust is constantly being shaped by ______ activity.4.My cousin loves to __________ (写作) poetry.5.How many Earth years does it take for Neptune to orbit the sun?A. 15B. 84C. 165D. 2506.The _____ (香草) smells wonderful.7.Which animal is famous for its stripes?A. LeopardB. TigerC. ZebraD. CheetahC8.Wha t do you call a story about someone’s life?A. NovelB. FictionC. BiographyD. LegendC9.He plays ______ (soccer) every Saturday.10.The chemical symbol for platinum is ______.11.What do you call a person who writes plays?A. PlaywrightB. DramaturgC. ScreenwriterD. All of the aboveA12.The __________ (历史的文化遗产) connects us to our past.13.What do we use to keep time?A. CalendarB. ClockC. MapD. Compass14.The owl's _______ (羽毛) helps it fly silently.15. A ________ (蛇) can be both dangerous and fascinating.16.The _____ can affect the orbits of nearby planets.17.What is the process of plants making food called?A. RespirationB. PhotosynthesisC. GerminationD. DigestionB18.The _____ (气候) affects which plants can grow in an area.19.What do we call the movement of air?A. WindB. BreezeC. DraftD. All of the above20.She wears a ________ to school.21.What is the opposite of ‘happy’?A. SadB. GladC. JoyfulD. Cheerful22.What is the name of the largest organ inside the human body?A. HeartB. LiverC. BrainD. LungsB Liver23. A reaction that occurs spontaneously is said to be ______.24.I believe that every toy can teach us something new about ________ (名词).25.What do you call a collection of stars?A. GalaxyB. PlanetC. StarfishD. Moon26.Gas particles are far apart and move ______.27.What is the name of the famous dessert made of layers of filo pastry?A. TiramisuB. BaklavaC. CheesecakeD. GelatoB Baklava28.The ________ was a famous explorer who discovered new lands.29.Sodium chloride is commonly known as _____.30.I saw a _______ (蝴蝶) resting on a flower.31.What do you call a person who studies the natural world?A. BiologistB. ChemistC. GeologistD. All of the aboveD32.The ________ (workshop) enhances learning.33.What do you call a person who studies the social behavior of humans?A. PsychologistB. SociologistC. HistorianD. AnthropologistB34.Many cultures have myths associated with ______.35.What do we call a baby cow?A. CalfB. KidC. LambD. FoalA36.My favorite animal is a ______ (猫).37.I feel ________ when I see my friends.38. A ________ (园艺技巧) can enhance growth.39.The ______ (小鸟) sings a joyful song as the sun rises.40.My friend is __________ (永远支持我).41.The ________ (运河) is used for trade and transport.42.What do we call the three primary colors?A. Red, Blue, YellowB. Green, Orange, PurpleC. Pink, Brown, BlackD. Gray, White, GoldA43.My favorite type of game is ______.44.I enjoy sharing my toy ________ (玩具名称) stories with friends.45.We have a family tradition of making ________ (饼干) during the holidays. It’s a sweet ________ (传统).46.The _______ can help create a welcoming atmosphere.47.I like to ______ my grandparents during holidays. (visit)48.The __________ is the part of a flower that protects the petals.49.The Great Wall is located in __________.50.The __________ was a significant time of exploration in the 15th century. (大航海时代)51.My friend is a _____ (技术人员) who fixes computers.52.The Earth is about ______ billion years old.53.What do we call the liquid part of blood?A. PlasmaB. SerumC. PlateletsD. HemoglobinA54. A chemical reaction can change the ______ of a substance.55.My favorite animal is a ______ (兔子) that hops around happily.56._____ (学校花园) can teach students about nature.57.Plants use sunlight to make food through ______.58.The __________ is home to many unique species of animals.59. A reaction that produces heat is called an ______ reaction.60.The chemical formula for benzene is ______.61.What do you call a house made of ice?A. IglooB. HutC. TentD. Cabin62.What is the term for the natural satellite of the Earth?A. PlanetB. SunC. MoonD. StarC63.The ________ (castle) is ancient and beautiful.64.The _____ (气球) float in the air.65.The __________ is a famous city known for its cuisine. (新奥尔良)66.The chemical formula for aluminum chloride is ______.67. A mixture of metals is called an ______.68. A _____ (野餐) in the park is enjoyable in spring.69.How many days are there in a leap year?A. 364B. 365C. 366D. 367C 36670.What is the name of the famous bear from the Hundred Acre Wood?A. PaddingtonB. Winnie the PoohC. YogiD. Smokey71.The boy likes to ________.72.Astronauts train for missions in _______ environments.73.My sister is good at __________ (语言).74.The fish is _____ in the water. (swimming)75.I can ___ my name. (spell)76.What do we call a large collection of stars, gas, and dust held together by gravity?A. GalaxyB. NebulaC. ClusterD. Universe77.What is the opposite of "fast"?A. QuickB. SlowC. SpeedD. RapidB78.The sun is shining ___. (brightly)79.The atomic mass of an element is measured in _____ units.80.We play ___ (games/sports) after school.81.I like to go ________ (爬山) with my friends.82.The dog is ________ (在) the yard.83.What is the national animal of the United States?A. EagleB. BearC. LionD. WolfA84.What is 12 4?A. 6B. 7C. 8D. 9C85.I can ______ (学习) from my mistakes.86.I want to _____ (learn) about space.87. A substance that donates protons in a reaction is called a ______.88.What is 10 - 4?A. 5B. 6C. 7D. 889.The ________ hops around and explores.90.The __________ is a major river in Asia. (湄公河)91.The reaction between an acid and a base produces ______.92.I enjoy exploring ______ (国家公园) to see wildlife and natural beauty.93.What do we call the process of using renewable resources sustainably?A. ConservationB. ExploitationC. DepletionD. PreservationA94.The __________ can reveal the history of tectonic plate movements.95.The __________ provides habitat for many organisms.96. A polar molecule has a positive and a negative ______.97.She is ________ (interested) in science.98. A _____ (植物观察者) can contribute to citizen science.99.What is the opposite of soft?A. HardB. SmoothC. RoughD. FirmA100.The Earth's atmosphere is vital for sustaining ______.。
小学上册英语第4单元真题试卷英语试题一、综合题(本题有100小题,每小题1分,共100分.每小题不选、错误,均不给分)1.The ancient Silk Road was a trade route that connected _______ and Europe.2. A ______ is a geological feature that can provide habitat.3.We celebrate ________ (milestones) together.4.Mr. Smith is a ______. He repairs cars.5.The country known for its historical architecture is ________ (希腊).6.The __________ (历史的激励因素) prompt reflection.7. A reaction that absorbs heat is called an ______ reaction.8.The artist showcases her work at _____ (展览).9.The process of ______ occurs when materials are transported by water.10. A ____ is often seen in fields looking for food.11.I have fun playing board games with my ____.12.I wear _____ (帽子) in winter.13.Photosynthesis is a process that plants use to convert _______ into energy. (光能)14.What do you call the practice of planting and growing crops?A. AgricultureB. HorticultureC. GardeningD. FarmingA15.The _____ (小兔) hops in the grass.16. A ______ is a small animal that hops around.17.When it snows, I love going ________ (滑雪) with my family. It’s thrilling and________ (刺激的).18.Which season is the hottest?A. WinterB. SpringC. SummerD. AutumnC19.Which instrument has keys and is played with fingers?A. GuitarB. DrumsC. PianoD. ViolinC20.The __________ is the capital city of Chile. (圣地亚哥)nd reclamation) creates new land from oceans or rivers. The ____22.The _______ can serve many purposes in the environment.23.I need to _____ (finish/start) my homework.24.What do you call the time it takes for the Earth to rotate once on its axis?A. DayB. MonthC. YearD. HourA25.The Crab Nebula is the remnant of a _______ explosion.26.How many legs does an octopus have?A. SixB. EightC. FourD. Ten27.The chemical symbol for iridium is _______.28.The Earth's mantle is mostly made up of ______ rock.29.The main purpose of vaccines is to stimulate the _____ system.30.My cousin enjoys __________ (过节日) with family.31.The process of ______ can lead to new land formations.32.What do you call an animal that eats both plants and animals?A. HerbivoreB. CarnivoreC. OmnivoreD. InsectivoreC33.What is the process of turning a liquid into a solid called?A. MeltingB. FreezingC. EvaporatingD. CondensingB34.The _______ of sound can be affected by the medium it travels through.35.My brother plays _______ (足球) every weekend.36. A _______ reaction occurs when two gases react.37.What is the name of the ocean next to the USA on the east coast?A. Indian OceanB. Atlantic OceanC. Pacific OceanD. Arctic OceanB38.The teacher is ___ the children. (guiding)39.The monkey is ______ (swinging) from tree to tree.40.My father is a _____ (teacher/doctor).41.The __________ (历史的对抗) illustrate struggles for justice.42.The _______ (海鸥) searches for food.43. are great at ______ (攀爬). Squirrel44.The classroom is very ________.45.What do we call the study of birds?A. OrnithologyB. ZoologyC. BotanyD. EcologyA46.What do we call a person who catches fish?A. FishermanB. AnglerC. MarinerD. All of the above47.I have a favorite ________ that helps me create.48.What do we call the edge of a planet's atmosphere?A. StratosphereB. MesosphereC. TroposphereD. ExosphereD49.What is the name of our galaxy?A. AndromedaB. Milky WayC. WhirlpoolD. Triangulum50.An atom is made up of protons, neutrons, and _____.51.Which continent is known as the "Dark Continent"?A. AsiaB. AfricaC. EuropeD. Australia52.My dad is _______ (cooking) dinner.53.The process of fermentation can produce __________ and carbon dioxide.54.The temperature drops at ______ (晚上).55.We are going to a ______ (festival) this summer.56.When it rains, I like to jump in ______ (水坑).57.The cake is _______ (decorated) with strawberries.58.What do you call a young tortoise?A. HatchlingB. PupC. KitD. Calf59.What color do you get when you mix red and white?A. PinkB. PurpleC. BrownD. OrangeA60.I have a pet _______ (狗), and it loves to _______ (跑步).61.Which bird is known for building large nests?A. SparrowB. EagleC. StorkD. Crow62.We will _______ (一起去) hiking this weekend.63.I see a _____ (小鸟) in the tree.64.What is the capital of Nigeria?A. LagosB. AbujaC. KanoD. Port HarcourtB65.We should protect __________ (濒危) plant species.66. A physical property of metals is that they are ______.67.The cat likes to catch a _____.68.The ancient Greeks held the Olympic Games every ________ (四年).69.I love to watch unboxing videos of ________ (玩具名) on the internet.70. A hamster's cheeks can hold a lot of ______ (食物).71.I have a good _____ (朋友).72.The ______ (根系) help absorb nutrients.73. A rabbit's nose twitches when it senses ______ (气味).74.The ________ was a famous document that shaped law and governance.75.What do we call the study of the mind and behavior?A. SociologyB. PsychologyC. AnthropologyD. PhilosophyB76.He is a _____ (商人) who runs a successful company.77. A _____ (猫) can be very affectionate and loving.78.The _____ (moon) is bright.79.My brother is my silly _______ who makes jokes.80.The ______ (果实) of a tomato is actually a berry.81.I put my shoes _____ the door. (by)82.My brother is a ______. He enjoys playing video games.83.I enjoy playing outside when it’s __________. (愉快的)84.Certain plants can provide food for both humans and ______. (某些植物可以为人类和动物提供食物。
《分数的意义和性质》单元检测卷(2013.5)
班级: 姓名:
一、填空。
(每题2分,26分)
1.4÷9= ( )9= 8( )= ( )54= 16( )
2.715
米表示把1米平均分成( )份,取其中的( )份的数;也可以表示把( )米平均分成( )份,取其中的1份的数。
3. 空气中的氧气大约占1/5,表示把( )看作单位1,( )占了1份。
4.2米长的绳子,平均分成3段,每段占全长的( ),每段长( )米。
5.12
8的分数单位是( ),再加上( )个这样的分数单位就是1。
6.1里有( )个41,3里有 ( )个6
1。
7.3千米的41相当于1千米的( )。
1千克的5
2相当于2千克的( ) 8.两个质数的最小公倍数是51,最大公因数是17,这两个质数是( )和( )。
9.在下面的括号里填上适当的分数。
45分=( )时 35立方分米=( )立方米
225平方分米=( )平方米 3083毫升=( )升
1o .在7
中,A 是非0的自然数,当A ( )时,分数的值小于1;当A ( )时,分数的值等于1;当A ( )时,分数的值大于1.
11.7
2的分母加上14,要使分数的大小不变,分子应加上( ),如果分子乘4,要使分数的大小不变,分母应加上( )。
12.分母是7的最大真分数是( ),最小假分数是( )。
13.一台碾米机30分碾米50千克,平均每分碾米( )千克,照这样算,碾1千克米要
( )分。
二、选择。
(20分)
1.右图中阴影部分用分数表示是( )
①21 ②31 ③5
2 2.分子相同的分数,( )。
①分数单位相同 ②分数大小相同 ③所含分数单位的个数相同
3.修一条4千米的路,计划10天修完。
照计划施工,5天修完全长的( )
①
21 ②51 ③5
2 4.把一根绳子剪成两段,第一段占全长的73,第二段长73米,两段相比( ) ①第一段长 ②第二段长 ③一样长
5.小于31大于5
1的分数有( )。
①0个 ②1个 ③无数个
6.把几个分数化成分母相同而大小不变的分数是( )
①通分 ②约分 ③化成最简分数
7.配置一种盐水,100克水中要加入3克水,这种盐水,盐占盐水的( )
①1003 ② 103
3 ③973
8.把4千克糖平均分成8包,每包占4千克的( )。
①81 ②81千克 ③8
5千克
9.下面不能化成有限小数的是( )
①
2415 ②6512 ③1615 10.100
7公顷是( ) ①7平方米 ②70平方米 ③700平方米
三、计算。
(30分)
1.先通分,再比较分数的大小。
(10分)
125和187 2091和521 1311和43 127、85和169
2.把下面分数化成最简分数。
(10分)
1210= 5117= 159= 9114= 2575=
3.填表。
(10分)
用小数表示 用分数表示 125平方分米
( )平方米 ( )平方米 ( )千克
( )t 25021t 225立方厘米
( )L ( )L ( )cm 2
0.375m 2 ( )m 2
45分钟 ( )小时 ( )小时 四、解决问题。
(24分)
1.小红3小时走14千米,小明5小时走23千米。
谁的速度快些?
2.修一条2千米长的路需3天,平均每天修这条路的几分之几?平均每天修几分之几千米?
3.王师傅生产一批零件要5小时,李师傅生产同样的一批零件则需6小时,王师傅和李师傅每小时分别完成这批零件的几分之几?
4.洗衣机厂计划25天生产1200台洗衣机,实际提前5天就完成了任务,实际每天完成了这项任务的几分之几?
5.有一种长方形长15厘米,宽12厘米,现要用这样的长方形拼成一个正方形,至少需要
这样的多少个?
6.修路队计划用5天时间修完一段长12千米的公路,第一天完成了3千米,第二天完成了全部任务的4
1 ,还要完成全部任务的几分之几?
7.现有两个杯子,甲杯子里放了55毫升开水,乙杯里放了120毫升开水,如果在这两个杯子中放入同样规格的白糖,甲杯中放入33克白糖,乙杯中放入60克白糖,搅拌后两个杯子中的水哪杯甜一点?(提示:可以结合实际生活找找比较方法)。