最新小升初数学易错题专项训练1优秀名师资料.docx

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最新小升初数学易错题专项训练1优秀名师资料.docx

最新小升初数学易错题专项训练1优秀名师资料

小升初数学易错题专项训练1

专项训练一:

易错的分数与百分数应用题1.某工厂的女工人数是男工的80%,因工作需要,又调入女工30人,这时女工人数比男工多10%,这个工厂有男工多少人,

2.某校参加数学竞赛的男女生人数比为6:

5,后来又增加了5名女

8生,这时女生人数是男生的,原来参加竞赛的女生有多少人,(2011

9

年11中第一试试题)

3(有两袋米,甲袋比乙袋少18千克(一如果再从甲袋倒入乙袋6

5千克,这时甲袋米相当于乙袋的。

两袋米原来各有多少千克?

8

14.甲组人数比乙组人数多,后来从甲组调9个人到乙组,此时乙组3

4人数比甲组多。

问:

原来甲、乙组各有多少人?

5

5.某校六一班男女生人数比是2:

3,后来转进2名男生,转走3名

3女生,这时男生是女生人数的,现在男女生各有多少人,

4

36.粮站的大米占粮食总量的,卖出24吨大米后所剩的大米恰好占4

3所剩粮食总量的。

这个粮站原来共有粮食多少吨?

5

7(.运来含水量为90,的一种水果100千克,一星期后再测,发现含水量降低到80,。

现在这批水果的总重量是多少千克?

real,ineachpenbusinesslendingQiannotforbypenquery,ledtomortgagefailureof.(Vi)notinaccordancewiththerelevantprovisionsoftheBankoperation,failedtoidentifyfalsedocuments,certificates,authorizations,warrants,etc.(VII)inthecreditriskmanagementsystemtoprovidefalseinformation,isnotrequiredbytheguestratingcreditmanagementobjective,impartialratingsofcredit,resultingincreditdecision-makingerrors.(H)theinvestigationreportconclusionsoffalserecord,misleadingstatementormaterialomission,resultingincreditdecision-makingerrors.(I)theorders,directives,orders,suggestthatothersnotinvolvedintheinvestigationbusiness,issuedbytheinvestigators.(10)withouttheapprovalofauthorities,afterthefirstcreditinvestigation,creditfirstandthenrecord,counter-currentprocessoperationssuchasoperationpriortoapproval.(11)articledoesnotmeettheriskmanagementDepartment,MarketingManagementDepartmenttocarryoutsupervisionandinspectionandduediligenceevaluationsorprovidingfalseinformation.(12)otherviolationsresultincreditbusinessatsubstantialriskorsignificantpotentialriskbehaviours.Sixthchaptersupplementaryarticlesarticle28thofthisapproachbytheHeadOfficeofriskmanagementDepartmentisresponsiblefortheinterpretationandamendment.29thspontaneoushereinfromthedateofimplementation.QilusilvercomputertransmissionofqiluBankdocuments(2012),No.289QiluBankpersonalcreditonissuingtheNotificationGuidetobusinessriskmanagementbranch,jurisdictionandthejurisdictionofbusinesslines,Jinanbranch,headofficedepartmentswithinitsjurisdiction:

inordertoimprovethequalityofindividualcreditbusiness,optimizethestructureofassets,promotionof

8.一堆含水量为14.5%的煤,经过一段时间的风干,含水量降为10%,现在这堆煤的重量是原来的百分之几,

9.采了10千克蘑菇,它们的含水量为99%,精良晒后含水量下降到98%。

晾晒后的蘑菇重多少千克,

专项训练二:

易错的按比例分配题

11.甲乙丙丁得到一笔创新技术奖金,甲分到的是乙丙丁的和的,

2

11乙分到的是甲丙丁的和的,丙甲分到的是甲乙丁的和的,丁分到

43

奖金6500元,求这笔奖金多少元,

13142.甲乙丙三个数,甲的等于乙的,乙的等于丙的,甲比丙

2437少93,甲乙丙三个数的和是多少,

3、甲乙丙三人共存款2980元,甲取出380元,乙存入700元,丙取

1出自己存款的,这时三人存款的比为5:

3:

2,现在三人各存款多

3

少元,

224、甲乙丙三人共存款7900元,甲储蓄的等于乙储蓄的,等于

187

1丙储蓄的,那么三人各储蓄多少元,

3

15.某校采购三种球,其中篮球占总数的,足球与其它两中球的个数

3

比是1:

5,排球买了150个。

求该校采购的三种球的总数real,ineachpenbusinesslendingQiannotforbypenquery,ledtomortgagefailureof.(Vi)notinaccordancewiththerelevantprovisionsoftheBankoperation,failedtoidentifyfalsedocuments,certificates,authorizations,warrants,etc.(VII)inthecreditriskmanagementsystemtoprovidefalseinformation,isnotrequiredbytheguestratingcreditmanagementobjective,impartialratingsofcredit,resultingincreditdecision-makingerrors.(H)theinvestigationreportconclusionsoffalserecord,misleadingstatementormaterialomission,resultingincreditdecision-makingerrors.(I)theorders,directives,orders,suggestthatothersnotinvolvedintheinvestigationbusiness,issuedbytheinvestigators.(10)withouttheapprovalofauthorities,afterthefirstcreditinvestigation,creditfirstandthenrecord,counter-currentprocessoperationssuchasoperationpriortoapproval.(11)articledoesnotmeettheriskmanagementDepartment,MarketingManagementDepartmenttocarryoutsupervisionandinspectionandduediligenceevaluationsorprovidingfalseinformation.(12)otherviolationsresultincreditbusinessatsubstantialriskorsignificantpotentialriskbehaviours.Sixthchaptersupplementaryarticlesarticle28thofthisapproachbytheHeadOfficeofriskmanagementDepartmentisresponsiblefortheinterpretationandamendment.29thspontaneoushereinfromthedateofimplementation.QilusilvercomputertransmissionofqiluBankdocuments(2012),No.289QiluBankpersonalcreditonissuingtheNotificationGuidetobusinessriskmanagementbranch,jurisdictionandthejurisdictionofbusinesslines,Jinanbranch,headofficedepartmentswithinitsjurisdiction:

inordertoimprovethequalityofindividualcreditbusiness,optimizethestructureofassets,promotionof

专项训练三:

易错的行程问题1.一条公路全长60千米,分成上坡、平路、下坡路三段,各段路的

长度比是1:

2:

3,某人走各段路所用的时间比是3:

4:

5.已知

他走平路的速度是每小时5千米,他走完全程用多少时间,

2.甲乙两车同时从A、B两地相向开出,速度比是7:

11.两车第一次相遇后继续按原方向前进,各自到达终点后立即返回,第二次相遇时,甲车离B地80千米,求A、B间的距离。

3.甲乙两车同时从东西两站地相向开出,第一次在过中点西侧12千米处相遇,相遇后继续按原方向前进,各自到达终点后立即返回,第二次相遇点离东站20千米,求东西两站间的距离。

4.甲乙两车同时从A、B两地相向开出,第一次相遇点离A站90千米,第一次相遇后继续按原方向前进,各自到达终点后立即返回,第二次相遇时离B地的距离占AB两站间的35%,求A、B间的路程是多少千米,

5.甲乙二人分别从A、B两地同时出发,相向而行,出发时他们的速度比是3:

2.相遇后甲速提高20%,乙速提高40%,当甲到达B地时,乙离A地26千米,求A、B间的距离。

real,ineachpenbusinesslendingQiannotforbypenquery,ledtomortgagefailureof.(Vi)notinaccordancewiththerelevantprovisionsoftheBankoperation,failedtoidentifyfalsedocuments,certificates,authorizations,warrants,etc.(VII)inthecreditriskmanagementsystemtoprovidefalseinformation,isnotrequiredbytheguestratingcreditmanagementobjective,impartialratingsofcredit,resultingincreditdecision-makingerrors.(H)theinvestigationreportconclusionsoffalserecord,misleadingstatementormaterialomission,resultingincreditdecision-makingerrors.(I)theorders,directives,orders,suggestthatothersnotinvolvedintheinvestigationbusiness,issuedbytheinvestigators.(10)withouttheapprovalofauthorities,afterthefirstcreditinvestigation,creditfirstandthenrecord,counter-currentprocessoperationssuchasoperationpriortoapproval.(11)articledoesnotmeettheriskmanagementDepartment,MarketingManagementDepartmenttocarryoutsupervisionandinspectionandduediligenceevaluationsorprovidingfalseinformation.(12)otherviolationsresultincreditbusinessatsubstantialriskorsignificantpotentialriskbehaviours.Sixthchaptersupplementaryarticlesarticle28thofthisapproachbytheHeadOfficeofriskmanagementDepartmentisresponsiblefortheinterpretationandamendment.29thspontaneoushereinfromthedateofimplementation.QilusilvercomputertransmissionofqiluBankdocuments(2012),No.289QiluBankpersonalcreditonissuingtheNotificationGuidetobusinessriskmanagementbranch,jurisdictionandthejurisdictionofbusinesslines,Jinanbranch,headofficedepartmentswithinitsjurisdiction:

inordertoimprovethequalityofindividualcreditbusiness,optimizethestructureofassets,promotionof

6.一辆快车和一辆慢车分别从甲乙两地同时相对开出,经过12小时相遇,快车又行了8小时到达乙地,那么相遇后慢车还要行驶多少小时才能到达甲地,

7.从甲地到乙地快车要6小时,慢车要8小时,如果辆车同时从甲乙两地相对开出,可在距中点20千米处相遇,甲乙两地相距多少千米,

8.有一人从甲地上山,越过山顶到达山脚的乙地。

他上山速度是每小时2千米,下山速度是每小时5千米。

他从甲地到乙地要20.5小时,从乙地到甲地需14.5小时。

求甲乙两地的距离.

9.一个圆形花坛周长是240米,甲乙两人分别从花坛直径的两端同时出发,沿着圆周行进。

如果两人同向而行,甲追上乙需300秒;如果两人逆向而行50秒相遇。

甲乙两人的速度各是多少,

10.两条公路成十字交叉,甲从十字路口南1200米处向北直行,乙从十字路口处向东直。

甲乙同时出发10分后,两人与十字路口的距离相等,出发后100分钟,两人与十字路口的距离再次相等,此时他们距十字路口多少米,

11.一艘轮船顺流航行120千米,逆流航行80千米,共用16小时;顺流航行60千米,逆流航行120千米也用16小时;求水流速度和船在静水中的速度

real,ineachpenbusinesslendingQiannotforbypenquery,ledtomortgagefailureof.(Vi)notinaccordancewiththerelevantprovisionsoftheBankoperation,failedtoidentifyfalsedocuments,certificates,authorizations,warrants,etc.(VII)inthecreditriskmanagementsystemtoprovidefalseinformation,isnotrequiredbytheguestratingcreditmanagementobjective,impartialratingsofcredit,resultingincreditdecision-makingerrors.(H)theinvestigationreportconclusionsoffalserecord,misleadingstatementormaterialomission,resultingincreditdecision-makingerrors.(I)theorders,directives,orders,suggestthatothersnotinvolvedintheinvestigationbusiness,issuedbytheinvestigators.(10)withouttheapprovalofauthorities,afterthefirstcreditinvestigation,creditfirstandthenrecord,counter-currentprocessoperationssuchasoperationpriortoapproval.(11)articledoesnotmeettheriskmanagementDepartment,MarketingManagementDepartmenttocarryoutsupervisionandinspectionandduediligenceevaluationsorprovidingfalseinformation.(12)otherviolationsresultincreditbusinessatsubstantialriskorsignificantpotentialriskbehaviours.Sixthchaptersupplementaryarticlesarticle28thofthisapproachbytheHeadOfficeofriskmanagementDepartmentisresponsiblefortheinterpretationandamendment.29thspontaneoushereinfromthedateofimplementation.QilusilvercomputertransmissionofqiluBankdocuments(2012),No.289QiluBankpersonalcreditonissuingtheNotificationGuidetobusinessriskmanagementbranch,jurisdictionandthejurisdictionofbusinesslines,Jinanbranch,headofficedepartmentswithinitsjurisdiction:

inordertoimprovethequalityofindividualcreditbusiness,optimizethestructureofassets,promotionof

12.小刚上山速度是每小时2千米,下山速度是每小时6千米,他上下山的平均速度是多少千米,

13.小明上学时每分走60米,如果要使他上学和下学回家的平均速度是每小时40千米,则小明下学回家时每分钟应走多少千米,

14.甲乙两人在400米的环形跑道上练习竞走,两人同时出发,出发时甲在乙的后面,出发后6分钟甲第一次超过乙,30分钟后甲第二次超过乙,假设两人的速度保持不变,那么出发时甲在乙后面多少米,

15..甲乙两车同时从A、B两地相向开出,速度比是5:

4.相遇后,甲的速度减少20%,这样当甲到达B地时,乙离A地还有10千米,求A、B间的距离。

16.小明如果以每分走50米的速度从家到校,则要迟到8分钟,他这样走了2分钟后,改用每分走60米的速度前进,结果早到5分钟小明家离学校多少米,

14.,甲乙两车同时从A、B两地相向开出,经过2小时相遇。

.两车相遇后继续按原方向前进,又经过1.5小时,甲车到达B地,这时乙车距A地还有35千米,求A、B间的距离。

real,ineachpenbusinesslendingQiannotforbypenquery,ledtomortgagefailureof.(Vi)notinaccordancewiththerelevantprovisionsoftheBankoperation,failedtoidentifyfalsedocuments,certificates,authorizations,warrants,etc.(VII)i

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