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1、六年级上册数学竞赛试卷六年级数学上册知识竞赛试题 一、填空。 1、五个数的平均数是20，若把其中一个数改为40，则平均数是25，这个改动的数是( )。 2、一块长方形菜地，长与宽的比是10:7，如果长减少10米，宽增加17米，就变成一个正方形。这块正方形菜地的长和宽分别是( )米。 3、十几辆卡车运送315桶汽油,每辆卡车运的桶数一样多,且一次运完.那么, 每辆卡车运( )桶。 4、我国有13亿人员，每人节约1分钱，可以节约( )元，用这些钱帮助我国失学儿童重新上学，每人给400元，可以帮助( )名儿童重新上学。 5、一岁的小海龟问妈妈:我什么时候才能像你那么大。妈妈告诉他:等你像我这么大年龄
2、时，我就19岁了，海龟妈妈现在( )岁。 6、一年级的小朋友练习写数，那么他从1写到100，在这100个数中，共写了( )个 9、 决定圆的位置。圆的面积计算公式是 。 10、把10米长的铁丝平均分成4段，每段占全长的 ，每段长 米。 11、一个半圆的半径是4cm，它的周长是 ，面积是 612、一个分数加上它的分数单位等于1，减去它的一个分数单位等于，这 7个分数是 1113、比8米多是 8米比 少 4414、把2:7的后项加上21，要使比值不变，前项应 。 15、圆的周长与半径的比是 。 16、小学要举行篮球运动会，共有6个参赛队，如果每两个队之间都 要举行一场比赛，一共要比赛 场。 231
3、7、甲数的等于乙数的，甲乙两数和是69，甲数是 。 5418、在等腰三角形中，顶角与底角的度数比是5:2，底角是 。 19、一枚硬币，抛10次，其中有7次正面朝上，下一次抛正面朝上的可能性是 。 20、把一张长方形纸连续对折四次，其中的一份是这张纸的 。 21、在直径1.5米的圆形桌布周围缝一条花边，接头处5厘米，这条花边长( )米。 22、有20个人，每两人握一次手，一共要握( )次手。 23、张师傅用1千克的干面粉可以加工成1.5千克的湿面条，如果要制做12千克的湿面条，他需要用( )千克的干面粉。 supervision upon the acceptance of electric h
4、oist can be installed before installation check before leaving the factory the factory information, including factory certificate, inspection reports and so on whether met with factory-installed condition. Its installation, only to release the running gear, running gear wheel can be fixed on the tra
5、ck under the steel flange, and power lines running. 1) before the installation, must be fully informed of the manufacturer for the installation of electric hoists on technical performance, usage, installation instructions. 2) after the transfer of equipment, electric hoist track embedded parts desig
6、n or installation, the hoist should be first buried track and all its components, structural Assembly, or mechanical Assembly such as checking . Check the cleaning machine parts are manufactured in the factory are complete, each component has any damage in transport, during storage . Check all parts
7、 installed at the Assembly tag belongs to the cleaning machine parts. Anyone who does not belong to the cleaning machine parts or assemblies, not the Assembly together . Found in the Assembly to check damage, defects or missing parts, repair should be carried out, padded 25、大年三十彩灯悬,彩灯齐明光灿灿,三三数时能数尽,五
8、五数时剩一盏,七七数时刚刚好,八八数时还缺三。请你自己猜一猜，彩灯至少有_ 28、一排电线杆，原来两根之间的距离是35米，现改为45米，如果起点的一根位置不移动，至少_米又有一根电线杆不需要移动。 29、蜗牛从一个枯井往上爬，白天向上爬110厘米，夜里向下滑40厘米，若要第五天的白天爬到井口，这口井至少深( )厘米。 30、A、B两地相距21千米，上午9时甲、乙分别从A、B两地出发，相向而行，甲到达B地后立即返回，乙到达A地后立即返回，中午12时他们第二次相遇。此时甲走的路程比乙走的路程多9千米。甲每小时走_千32、一个三角形的三条边长是三个两位的连续偶数,它们的末位数字和能被7整除,这个三角
9、形的最大周长等于 。 33、10点15分时，时针和分针的夹角是_?。 34、黑珠、白珠共102颗，穿成一串，排列如下图: 这串珠子中，最后一颗珠子应该是_色的,这种颜色的珠子在这串中共有( ) 36、一个等腰梯形有三条边的长分别是55厘米、25厘米、15厘米，并且它的下底是最长的一条边。那么，这个等腰梯形的周长是_ _厘米。 37、用某自然数a去除1992，得到商是46，余数是r。a=_ _，r=_ _。 38、.“重阳节”那天，延龄茶社来了25位老人品茶。他们的年龄恰好是25个连续自然数，两年以后，这25位老人的年龄之和正好是2000。其中年龄最大的老人今年_ _岁。 39、五名选手在一次数
10、学竞赛中共得404分，每人得分互不相等，并且其中得分最高的选手得90分。那么得分最少的选手至少得_ _分，至多得 _ _分。(每位选手的得分都是整数) 40、要把1米长的优质铜管锯成长38毫米和长90毫米两种规格的小铜管，每锯一次都要损耗1毫米铜管。那么，只有当锯得的38毫米的铜管为_ _段、90毫米的铜管为_ _段时，所损耗的铜管才能最少。 42、用两个同样的正方体拼成一个长方体，表面积减少14.4平方分米，这个长方体的表面积是( )平方米。 43、把6米长的铁丝平均分成7段，每段长是1米的()。 e Assembly to check damage, defects or missing
11、parts, repair should be carried out, paddedhine parts. Anyone who does not belong to the cleaning machine parts or assemblies, not the Assembly together . Found in thng maccomponent has any damage in transport, during storage . Check all parts installed at the Assembly tag belongs to the cleanimecha
12、nical Assembly such as checking . Check the cleaning machine parts are manufactured in the factory are complete, each y, or rack embedded parts design or installation, the hoist should be first buried track and all its components, structural Assemblctric hoists on technical performance, usage, insta
13、llation instructions. 2) after the transfer of equipment, electric hoist tf elelange, and power lines running. 1) before the installation, must be fully informed of the manufacturer for the installation ocondition. Its installation, only to release the running gear, running gear wheel can be fixed o
14、n the track under the steel f installed-actory information, including factory certificate, inspection reports and so on whether met with factorysupervision upon the acceptance of electric hoist can be installed before installation check before leaving the factory the f2 x4y44、已知 乙; (3)甲乙; (4)无法确定。 3
15、、用三根同样长的铁丝分别围成正方形、长方形和圆，( )面积最小。 A.圆 B.正方形 C.长方形 D.无法确定 34、一个长方体的棱长是72cm，长、宽、高的比是4:3:2，长方体的体积是( )cm。 A.92 B.8 C.96 D.384 225、把一根铁丝截成两段，第一段长米，第二段占全长的，两段铁丝长度相比( ) 33A.第一段长 B.第二段长 C.一样长 D.无法确定 116、一份稿件单独打，甲要小时，乙要小时，甲乙两人的效率比是( ) 6411 A.3:2 B.2:3 C. : 647、把一根木料锯成10段，锯一段所用的时间是锯10段所用时间的( ) the torage . Che
16、ck all parts installed at the Assembly tag belongs to the cleaning machine parts. Anyone who does not belong tothe cleaning machine parts are manufactured in the factory are complete, each component has any damage in transport, during s Check e hoist should be first buried track and all its componen
17、ts, structural Assembly, or mechanical Assembly such as checking .installation instructions. 2) after the transfer of equipment, electric hoist track embedded parts design or installation, thage, installation, must be fully informed of the manufacturer for the installation of electric hoists on tech
18、nical performance, us the running gear, running gear wheel can be fixed on the track under the steel flange, and power lines running. 1) before theinstalled condition. Its installation, only to release -factory certificate, inspection reports and so on whether met with factory ce of electric hoist c
19、an be installed before installation check before leaving the factory the factory information, includingsupervision upon the acceptanparts, repair should be carried out, padded cleaning machine parts or assemblies, not the Assembly together . Found in the Assembly to check damage, defects or missing3
20、 191 A. B. 10倍 C. D. 101098、一个圆环形跑道，内外道相差1米，小明从内道，小刚从外道，各跑一圈，小明比小刚少跑约( )米。 ,(3.14 ,(6.28 ,(1 ,(2 9、要使0.5:x的比值恰好是最小的质数，x的值应是( )。 ,(0.5 ,(0.25 ,(0.125 ,(0.1 10、奇数( )结果是偶数。 A、加上2 B、 减去2 C、乘以2 D、 除以2 11、有30.3千克盐水，盐和水的比是 1:100，其中水占( )。 A、3千克 B、 30千克 C、 0.303千克 D、 0.3千克 12、在一个除法算式里，被除数、除数、商的和是53，商是5，被除数是(
21、 ) A、8 B、9.6 C、40 D、35 aa5a513、 是真分数， ( ) ? bb6b6A、, B、, C、, D、无法确定 3314、甲乙两根同样长的绳子，甲根剪去它的 ，乙根剪去 米，剩下两根绳子的长度相比88( ) A、甲比乙长 B、乙比甲长 C、一样长 D、无法确定 15、把正方体的棱长扩大4倍，它的表面积扩大( ) A、4倍 B、8倍 C、12倍 D、16倍 716、要使 扩大5倍，如果把分子加上21，那么分母就必须( ) 25A、加上21 B、减少5 C、增加5 D、缩小5倍 三、判断，对的画“?”，错的画“”。 1、甲数是乙数的因数，甲乙的最小公倍数是乙数。 ( ) 2
22、、半径等于直径的一半，直径等于半径的2倍。 ( ) 3、圆、长方形、正方形、平行四边形都是轴对称图形。 ( ) 14、把一个数平均分成n份，求每份是多少，可以用这个数乘。 ( ) n5、小强身高1m，爸爸身高170cm，爸爸和小强身高比是17:10。 ( ) 6、圆的半径扩大3倍，它的周长也扩大3倍，面积扩大6倍。 ( ) 27、最小质数与最小合数的和，是最大一位数的 。 ( ) 38、半径是2厘米的圆，它的周长和面积恰好相等。 ( ) 9、最小的整数单位，是最大的小数单位的10倍。 ( ) e Assembly to check damage, defects or missing part
23、s, repair should be carried out, paddedhine parts. Anyone who does not belong to the cleaning machine parts or assemblies, not the Assembly together . Found in thng maccomponent has any damage in transport, during storage . Check all parts installed at the Assembly tag belongs to the cleanimechanica
24、l Assembly such as checking . Check the cleaning machine parts are manufactured in the factory are complete, each y, or rack embedded parts design or installation, the hoist should be first buried track and all its components, structural Assemblctric hoists on technical performance, usage, installat
25、ion instructions. 2) after the transfer of equipment, electric hoist tf elelange, and power lines running. 1) before the installation, must be fully informed of the manufacturer for the installation ocondition. Its installation, only to release the running gear, running gear wheel can be fixed on th
26、e track under the steel f installed-actory information, including factory certificate, inspection reports and so on whether met with factorysupervision upon the acceptance of electric hoist can be installed before installation check before leaving the factory the f4 2110、一个数的 是14，这个数的倒数是 。 ( ) 74911
27、、两个数互质，这两个数没有公约数。 ( ) 12、边长为1米的正方形里面有10个边长为1分米的正方形。( ) 1313、3米长的钢丝截取全长的 后，剩下 米。 ( ) 4414、两个长方体的体积相等，表面积一定相等 ( ) 1115、火车的速度比汽车快 ，则汽车的速度比火车慢 ( ) 56116、a:b的比值是6，则b就是a 的 ( ) 6四、用你喜欢的方式计算。 35316316 (，)24 ?4， 999，999999 6482142111111129 2222 ，66660.09,33330.04 + + + + + 2612203040100 19977511+3+5+7+97+99
28、1999 36( ， , ) 199812944317311 ?( , )? ， ?9 554104943333 100( ， ， ， ， ) 144771097100531717?(-) 87 321.250.25 9714988torage . Check all parts installed at the Assembly tag belongs to the cleaning machine parts. Anyone who does not belong tothe cleaning machine parts are manufactured in the factory ar
29、e complete, each component has any damage in transport, during s Check e hoist should be first buried track and all its components, structural Assembly, or mechanical Assembly such as checking .installation instructions. 2) after the transfer of equipment, electric hoist track embedded parts design
30、or installation, thage, installation, must be fully informed of the manufacturer for the installation of electric hoists on technical performance, us the running gear, running gear wheel can be fixed on the track under the steel flange, and power lines running. 1) before theinstalled condition. Its
31、installation, only to release -factory certificate, inspection reports and so on whether met with factory ce of electric hoist can be installed before installation check before leaving the factory the factory information, includingsupervision upon the acceptanparts, repair should be carried out, pad
32、ded cleaning machine parts or assemblies, not the Assembly together . Found in the Assembly to check damage, defects or missingthe 5 915223315+7 2?-?2 110?56(-) 81616337五、画一画，做一做。 21、下图是一个圆形的废旧木料，它的面积是31.4cm，要把它加工成一个最大的正方形木板。(4分) (1)请你在圆中画出这个最大的正方形。 (2)这个正方形的面积是多少平方厘米, O 2、计算下图阴影部分的面积。(单位:cm) 2 3 2
33、3 六、生活中的数学。 小时相遇，甲车再开3小时到达B地，已知11、小明看一本书，第一天看了，如果再看5甲车每小时比乙车快20千米，求A、B两地120页，这时已看的页数与未看页数的比的距离。 是3:2，这本书多少页, 2、张明看一本120页的故事书，第一天看了4、一批化肥第一次运走了18吨，第二次运121全书的 ，第二天看了余下的 ，第三天应走了总数的 ，剩下的化肥与运走的化肥重454从第几页看起, 量比是9 :11，这批化肥共有多少吨, 3、甲乙两车同时从A、B两地相对开出，45、某商品按每个5元利润卖出11个的钱，e Assembly to check damage, defects or
34、 missing parts, repair should be carried out, paddedhine parts. Anyone who does not belong to the cleaning machine parts or assemblies, not the Assembly together . Found in thng maccomponent has any damage in transport, during storage . Check all parts installed at the Assembly tag belongs to the cl
35、eanimechanical Assembly such as checking . Check the cleaning machine parts are manufactured in the factory are complete, each y, or rack embedded parts design or installation, the hoist should be first buried track and all its components, structural Assemblctric hoists on technical performance, usa
36、ge, installation instructions. 2) after the transfer of equipment, electric hoist tf elelange, and power lines running. 1) before the installation, must be fully informed of the manufacturer for the installation ocondition. Its installation, only to release the running gear, running gear wheel can b
37、e fixed on the track under the steel f installed-actory information, including factory certificate, inspection reports and so on whether met with factorysupervision upon the acceptance of electric hoist can be installed before installation check before leaving the factory the f6 1，买故事书用去10、买钢笔用去总钱数的
38、与按每个11元的利润卖出10个的钱一样多。48元，这时用去的钱数与剩下的钱数比是这种商品成本是多少元, 7:5。你知道还剩下多少钱吗, 11、某县参加数学竞赛的400名学生的平均 分是70分，其中男生的平均分是55分，女生的平均分是80分，男生比女生多多 少名, 6、有150个乒乓球分装在大小两种盒子里， 大盒装12个，小盒装7个，问需要大小盒子各多少个才能恰好把这些球装完, 12、一列火车长800米，以每秒钟20米的速 度通过长2400米的大桥，从上桥到下桥共需多少分钟/ 7、甲车每小时行20千米，乙车每小时行3013、甲、乙两仓库共有化肥250吨，运出甲千米。甲、乙两车同时从A城 出发后，
39、最少11仓库的和乙仓库的共55吨，送往张54多少小时后两车相距100千米, 庄供销社出售。甲、乙两仓库原来各有 化肥多少吨, 1 8、拖拉机第一天耕了，第二天耕了2公顷，3 114、求图中阴影部分的面积。(单位:厘米)还剩没耕，求一共有多少公顷,(要求:6根据题意画出线段图再做题) 9、王科长第一次购进4个水杯和3个保温杯 共花了54元钱，第二次购进8个水杯和 密4个保温杯，一共花了78元，水杯和个保温杯的单价各是多少元, 封 线 parts, repair should be carried out, padded cleaning machine parts or assemblies,
40、not the Assembly together . Found in the Assembly to check damage, defects or missingthe torage . Check all parts installed at the Assembly tag belongs to the cleaning machine parts. Anyone who does not belong tothe cleaning machine parts are manufactured in the factory are complete, each component
41、has any damage in transport, during s Check e hoist should be first buried track and all its components, structural Assembly, or mechanical Assembly such as checking .installation instructions. 2) after the transfer of equipment, electric hoist track embedded parts design or installation, thage, ins
42、tallation, must be fully informed of the manufacturer for the installation of electric hoists on technical performance, us the running gear, running gear wheel can be fixed on the track under the steel flange, and power lines running. 1) before theinstalled condition. Its installation, only to relea
43、se -factory certificate, inspection reports and so on whether met with factory ce of electric hoist can be installed before installation check before leaving the factory the factory information, includingsupervision upon the acceptan7 内不要答题tan1圆由两个条件唯一确定：一是圆心（即定点），二是半径（即定长）。(一)教学重点当a越大，抛物线开口越小；当a越小，
44、抛物线的开口越大。(2)相切: 直线和圆有惟一公共点时,叫做直线和圆相切,这时直线叫做圆的切线,惟一的公共点做切点.1、第二单元“观察物体”。学生将通过观察身边的简单物体，初步体会从不同角度观察物体所看到的形状可能是不同的发展空间观念。13.13.4入学教育1 加与减（一）1 P2-35.二次函数与一元二次方程(2)中心角、边心距：中心角是正多边形相邻两对角线所夹的角，边心距是正多边形的边到圆心的距离. 外圆半径:3cm;环宽:2cm 1. 仰角:当从低处观测高处的目标时，视线与水平线所成的锐角称为仰角e Assembly to check damage, defects or missing
45、 parts, repair should be carried out, paddedhine parts. Anyone who does not belong to the cleaning machine parts or assemblies, not the Assembly together . Found in thng maccomponent has any damage in transport, during storage . Check all parts installed at the Assembly tag belongs to the cleanimech
46、anical Assembly such as checking . Check the cleaning machine parts are manufactured in the factory are complete, each y, or rack embedded parts design or installation, the hoist should be first buried track and all its components, structural Assemblctric hoists on technical performance, usage, installation instructions. 2) after the transfer of equipment, electri