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1、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,(20119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65千克，这时甲袋米相当于乙袋的。两袋米原来各有多少千克? 814.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34人数比甲组多。问:原来甲、乙组各有多少人? 55.某校六一班男女生人数比是2:3
2、，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, 436.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43所剩粮食总量的。这个粮站原来共有粮食多少吨? 57(.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, in each pen business lending Qian not for by pen query, led to mortgage failure of. (Vi) not in accordance with the relevant provisions
3、of the Bank operation, failed to identify false documents, certificates, authorizations, warrants, etc. (VII) in the credit risk management system to provide false information, is not required by the guest rating credit management objective, impartial ratings of credit, resulting in credit decision-
4、making errors. (H) the investigation report conclusions of false record, misleading statement or material omission, resulting in credit decision-making errors. (I) the orders, directives, orders, suggest that others not involved in the investigation business, issued by the investigators. (10) withou
5、t the approval of authorities, after the first credit investigation, credit first and then record, counter-current process operations such as operation prior to approval. (11) article does not meet the risk management Department, Marketing Management Department to carry out supervision and inspectio
6、n and due diligence evaluations or providing false information. (12) other violations result in credit business at substantial risk or significant potential risk behaviours. Sixth chapter supplementary articles article 28th of this approach by the Head Office of risk management Department is respons
7、ible for the interpretation and amendment. 29th spontaneous herein from the date of implementation. Qilu silver computer transmission of qilu Bank documents (2012), No. 289Qilu Bank personal credit on issuing the Notification Guide to business risk management branch, jurisdiction and the jurisdictio
8、n of business lines, Jinan branch, head office departments within its jurisdiction: in order to improve the quality of individual credit business, optimize the structure of assets, promotion of 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
9、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， 211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1871丙储蓄的，那么三人各储蓄多少元, 315.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
10、3比是1:5，排球买了150个。求该校采购的三种球的总数 real, in each pen business lending Qian not for by pen query, led to mortgage failure of. (Vi) not in accordance with the relevant provisions of the Bank operation, failed to identify false documents, certificates, authorizations, warrants, etc. (VII) in the credit risk
11、management system to provide false information, is not required by the guest rating credit management objective, impartial ratings of credit, resulting in credit decision-making errors. (H) the investigation report conclusions of false record, misleading statement or material omission, resulting in
12、credit decision-making errors. (I) the orders, directives, orders, suggest that others not involved in the investigation business, issued by the investigators. (10) without the approval of authorities, after the first credit investigation, credit first and then record, counter-current process operat
13、ions such as operation prior to approval. (11) article does not meet the risk management Department, Marketing Management Department to carry out supervision and inspection and due diligence evaluations or providing false information. (12) other violations result in credit business at substantial ri
14、sk or significant potential risk behaviours. Sixth chapter supplementary articles article 28th of this approach by the Head Office of risk management Department is responsible for the interpretation and amendment. 29th spontaneous herein from the date of implementation. Qilu silver computer transmis
15、sion of qilu Bank documents (2012), No. 289Qilu Bank personal credit on issuing the Notification Guide to business risk management branch, jurisdiction and the jurisdiction of business lines, Jinan branch, head office departments within its jurisdiction: in order to improve the quality of individual
16、 credit business, optimize the structure of assets, promotion of 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
17、，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, in each pen business lending Qian not for by pen query, led to mortgage fa
18、ilure of. (Vi) not in accordance with the relevant provisions of the Bank operation, failed to identify false documents, certificates, authorizations, warrants, etc. (VII) in the credit risk management system to provide false information, is not required by the guest rating credit management objecti
19、ve, impartial ratings of credit, resulting in credit decision-making errors. (H) the investigation report conclusions of false record, misleading statement or material omission, resulting in credit decision-making errors. (I) the orders, directives, orders, suggest that others not involved in the in
20、vestigation business, issued by the investigators. (10) without the approval of authorities, after the first credit investigation, credit first and then record, counter-current process operations such as operation prior to approval. (11) article does not meet the risk management Department, Marketin
21、g Management Department to carry out supervision and inspection and due diligence evaluations or providing false information. (12) other violations result in credit business at substantial risk or significant potential risk behaviours. Sixth chapter supplementary articles article 28th of this approa
22、ch by the Head Office of risk management Department is responsible for the interpretation and amendment. 29th spontaneous herein from the date of implementation. Qilu silver computer transmission of qilu Bank documents (2012), No. 289Qilu Bank personal credit on issuing the Notification Guide to bus
23、iness risk management branch, jurisdiction and the jurisdiction of business lines, Jinan branch, head office departments within its jurisdiction: in order to improve the quality of individual credit business, optimize the structure of assets, promotion of 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
24、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
25、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, in each pen business lending Qian not for by pen query, led to mortgage failure of. (Vi) not in accordance with the relevant provisions of the Bank opera
26、tion, failed to identify false documents, certificates, authorizations, warrants, etc. (VII) in the credit risk management system to provide false information, is not required by the guest rating credit management objective, impartial ratings of credit, resulting in credit decision-making errors. (H
27、) the investigation report conclusions of false record, misleading statement or material omission, resulting in credit decision-making errors. (I) the orders, directives, orders, suggest that others not involved in the investigation business, issued by the investigators. (10) without the approval of
28、 authorities, after the first credit investigation, credit first and then record, counter-current process operations such as operation prior to approval. (11) article does not meet the risk management Department, Marketing Management Department to carry out supervision and inspection and due diligen
29、ce evaluations or providing false information. (12) other violations result in credit business at substantial risk or significant potential risk behaviours. Sixth chapter supplementary articles article 28th of this approach by the Head Office of risk management Department is responsible for the inte
30、rpretation and amendment. 29th spontaneous herein from the date of implementation. Qilu silver computer transmission of qilu Bank documents (2012), No. 289Qilu Bank personal credit on issuing the Notification Guide to business risk management branch, jurisdiction and the jurisdiction of business lin
31、es, Jinan branch, head office departments within its jurisdiction: in order to improve the quality of individual credit business, optimize the structure of assets, promotion of 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
32、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
33、、B间的距离。 real, in each pen business lending Qian not for by pen query, led to mortgage failure of. (Vi) not in accordance with the relevant provisions of the Bank operation, failed to identify false documents, certificates, authorizations, warrants, etc. (VII) in the credit risk management system to
34、provide false information, is not required by the guest rating credit management objective, impartial ratings of credit, resulting in credit decision-making errors. (H) the investigation report conclusions of false record, misleading statement or material omission, resulting in credit decision-makin
35、g errors. (I) the orders, directives, orders, suggest that others not involved in the investigation business, issued by the investigators. (10) without the approval of authorities, after the first credit investigation, credit first and then record, counter-current process operations such as operatio
36、n prior to approval. (11) article does not meet the risk management Department, Marketing Management Department to carry out supervision and inspection and due diligence evaluations or providing false information. (12) other violations result in credit business at substantial risk or significant pot
37、ential risk behaviours. Sixth chapter supplementary articles article 28th of this approach by the Head Office of risk management Department is responsible for the interpretation and amendment. 29th spontaneous herein from the date of implementation. Qilu silver computer transmission of qilu Bank doc
38、uments (2012), No. 289Qilu Bank personal credit on issuing the Notification Guide to business risk management branch, jurisdiction and the jurisdiction of business lines, Jinan branch, head office departments within its jurisdiction: in order to improve the quality of individual credit business, opt
39、imize the structure of assets, promotion of 15.甲乙两人同时以每小时4千米的速度从到地办事，行走2.5小时候，甲返回A地取文件，他以每小时6千米的速度赶往A地，取到文件后，仍以每小时6千米的速度回头追赶乙，结果他们同时到达B地。已知甲在办公室耽误了15分钟。求A、B间的距离 16.一辆汽车从甲地开往乙地，如果把车速提高20%，可以比原定时间提前1小时到;如果以原来的速度行120千米后，再将速度提高25%，则可提前40分钟到，甲乙两地相距多少千米, 17. 一辆汽车从甲地开往乙地，如果把车速提高20%，可以比原定时间提前1小时到;如果以原来的速度行1
40、00千米后，再将速度提高30%，也可比原定时间提前1小时到，甲乙两地相距多少千米, 18. 一辆汽车从甲地开往乙地，如果把车速提高20%，可以比原定时间提前1小时到;如果以原来的速度行200千米后，再将速度提高25%，则可提前12分钟到，甲乙两地相距多少千米, 19. 一列火车从甲地开往乙地，如果把车速提高20%，可以比原定时间提前1小时到;如果以原来的速度行240千米后，再将速度提高25%，则可提前40分钟到，甲乙两地相距多少千米, real, in each pen business lending Qian not for by pen query, led to mortgage fa
41、ilure of. (Vi) not in accordance with the relevant provisions of the Bank operation, failed to identify false documents, certificates, authorizations, warrants, etc. (VII) in the credit risk management system to provide false information, is not required by the guest rating credit management objecti
42、ve, impartial ratings of credit, resulting in credit decision-making errors. (H) the investigation report conclusions of false record, misleading statement or material omission, resulting in credit decision-making errors. (I) the orders, directives, orders, suggest that others not involved in the in
43、vestigation business, issued by the investigators. (10) without the approval of authorities, after the first credit investigation, credit first and then record, counter-current process operations such as operation prior to approval. (11) article does not meet the risk management Department, Marketin
44、g Management Department to carry out supervision and inspection and due diligence evaluations or providing false information. (12) other violations result in credit business at substantial risk or significant potential risk behaviours. Sixth chapter supplementary articles article 28th of this approa
45、ch by the Head Office of risk management Department is responsible for the interpretation and amendment. 29th spontaneous herein from the date of implementation. Qilu silver computer transmission of qilu Bank documents (2012), No. 289Qilu Bank personal credit on issuing the Notification Guide to bus
46、iness risk management branch, jurisdiction and the jurisdiction of business lines, Jinan branch, head office departments within its jurisdiction: in order to improve the quality of individual credit business, optimize the structure of assets, promotion of 20. 甲、乙两班进行越野行军比赛，甲班以4.5千米/时的速度走了路程的一半，又以5.5
47、千米/时的速度走完了另一半;乙班在比赛过程中，一半时间以4.5千米/时的速度行进，另一半时间以5.5千米/时的速度行进。问:甲、乙两班谁将获胜? 21. 轮船从A城到B城需行3天，而从B城到A城需行4天。从A城放一个无动力的木筏，它漂到B城需多少天? 22. 小红和小强同时从家里出发相向而行。小红每分走52米，小强每分走70米，二人在途中的A处相遇。若小红提前4分出发，且速度不变，小强每分走90米，则两人仍在A处相遇。小红和小强两人的家相距多少米? 解:因为小红的速度不变，相遇地点不变，所以小红两次从出发到相遇的时间相同。也就是说，小强第二次比第一次少走4分。由 (704)?(90-70)=1
48、4(分) 可知，小强第二次走了14分，推知第一次走了18分，两人的家相距 (52+70)18=2196(米)。 23. 小明和小军分别从甲、乙两地同时出发，相向而行。若两人按原定速度前进，则4时相遇;若两人各自都比原定速度多1千米/时，则3时相遇。甲、乙两地相距多少千米? 解:每时多走1千米，两人3时共多走6千米，这6千米相当于real, in each pen business lending Qian not for by pen query, led to mortgage failure of. (Vi) not in accordance with the relevant prov
49、isions of the Bank operation, failed to identify false documents, certificates, authorizations, warrants, etc. (VII) in the credit risk management system to provide false information, is not required by the guest rating credit management objective, impartial ratings of credit, resulting in credit decision-making errors. (H) the investigation report conclusions of false record, misleading statement or material omission, resulting in credit decision-