六年级数学总复习教案数的运算.doc

romoting the construction of rule of law, but also the most basic development environment. Despite my good social order in General, but there are law-abiding consciousness, social order is not standard, regardless of faith, Twining visit visit and other outstanding problems. We want to actively promote the field of multi-level governance according to law, promote the continuous improvement of the social environment. To promote universal compliance. Actively foster the rule of law culture, carry out law publicity and education on honesty and trustworthiness, guide the masses and consciously abide by the law, failing to find method, problem-solving method, method of gradually changing the world, he is not looking for but someone unspoken rules, formed all law law, abide by the good atmosphere. To strengthen the comprehensive management of public security. Deepening peace xingan construction, strongly against violence crime, mafia and serious criminal offences, to protect the legitimate rights and interests of citizens, legal persons, carry out criminal policy of temper justice with mercy, the maximum stimulating social vitality, and earnestly safeguard social harmony and stability. To resolve social conflicts by law. To further smooth channels of reporting social conditions and public opinion, improving regulation, arbitration, as wellrelationship between Government and business. The two sessions, General Secretary of Pro, clear the word succinctly summarized the new relationship between Government and business, as pure politics, reshaping the political relationship specified in the direction. District leaders in handling political and business relations, engage in trading power for money, and finally stumbled, we a lesson, always keep in mind that Pro, clean practicing Pro, clear. Pro is to open a sincere engagement with private enterprise to help solve practical difficulties; Clear is to clarify the Division of power, exercised in accordance with, private entrepreneurs with innocent purity, not abusing power for personal gain, not to engage in trading power for money. Third, in order to maintain fairness and justice. Fairness and justice is the lifeline of the rule of law, is the best development environment. Currently, lax law enforcement and the judicial sector in our region also exist to varying degrees, law enforcement departments and individual window units power for personal gains and bribes, thick friends, relations, human cases, money cases in which seriously infringe on the legitimate rights and interests of enterprises and people. Especially some law enforcement and inspection for profit purposes, deliberately looking for corporate loopholes, found directly under the ticket does not give business improvement opportunities. We recruit a company doesnt easily, cultivating a business more difficult, never for personal gain, systematic harassment, card, last checked to check to get the enterprise collapsed. To guarantee the legitimate rights and interests. Always proceed from the overall situation of reform and development of services, fully consider the characteristics of production and management in non-public enterprises and social benefits, an accurate grasp of legal limits, protect the enthusiasm of entrepreneurs and practitioners in innovation and entrepreneurship, enhancing expectations and confidence. To promote strict enforcement. Strengthening law enforcement procedures, improve law enforcement performance evaluation, strengthening the supervision of law enforcement, exploration and practice of risk control mechanism of law enforcement to further standardize the social security, urban management, road traffic administrative law enforcement, effectively free, extensive law-enforcement and lax enforcement of law enforcement and other issues. To uphold justice. Justice is the last line of Defense to safeguard fairness and justice, to unequivocally support the courts and procuratorates independently exercise level . Judicial activities were rampant, must not be allowed to run, favors, money, must not be allowed to knowingly violate the miscarriage, violations of the legitimate rights and interests of the masses must not be allowed to abuse of power, to make forest mass can be felt in every judicial cases in equity and justice. Four to deepen grass-roots governance according to lawchain do long, and put scale big. To serve the development of enterprises. Duocuo simultaneously improving service efficiency, build better public services platform, enhance work efficiency, initiative to help businesses solve the project procedures, financing loans, issues such as land-use approval, reduce operating costs, business travel light and enhance the confidence to overcome all kinds of difficulties and the Foundation, real entrepreneurial passion play entrepreneurship, enhance the internal vitality and creativity. SI XING an construction, promoting the rule of law, tries to make the transformation of forest development XI General Secretary stressed, to reinvigorate Northeast China, optimized development environment is very important. Environment of rule of law most gather Moss, the most conducive to development. Improving the leading cadres using the method of thought and the rule of law Administration work, problem-solving, the ability to promote the development, is the key to promoting the rule of law. The law may affect the efficiency of out of the path of development will be more smooth, won development gains will be sustained, and end with greater efficiency. Leading cadres at all levels should take the lead in respect of law law, abide by, and actively foster Socialist culture, actively promoting the field of multi-level governance according to law, guide the masses and consciously abide by the law, failing to find law, solve the problem by law, in accordance with the law prevail. XXX administration by law of leading cadres do not exist on the rule of law, law enforcement, casual, and vow not to investors, the new scores and other turmoil. These important expositions on my district create good development environment with highly targeted and guidance, especially the General Secretary pointed out that the chaos in my area also exists to varying degrees, some even quite serious. Leading cadres at all levels must improve the development environment of rule of law as a fundamental task, adhere to the problem oriented, solid and solve the problems in the construction of rule of law, to rule the new effect for development environment improvements. To hold key minority. Leaders of this group, although few in number, but the effect is critical. If a local leaders take the lead right according to law, in accordance with the law, the local CPPCC fresh, pragmatic and efficient development environment. Conversely, if a local leaders of ignoring the law, impunity, not only the political environment will be destroyed, will have serious implications for the development environment. Now, some leading cadres lack of awareness on the importance of learning, that learn or not does not matter. Think efficiency is too low too much, act according to the procedure, than an executive order getting along with. In dealing with complex issues, often speak of settling and done; on the issue of handling letters and visits, like to spend money and buy stop and stable, but disregard the law administration, in accordance with the law, the rulechain do long, and put scale big. To serve the development of enterprises. Duocuo simultaneously improving service efficiency, build better public services platform, enhance work efficiency, initiative to help businesses solve the project procedures, financing loans, issues such as land-use approval, reduce operating costs, business travel light and enhance the confidence to overcome all kinds of difficulties and the Foundation, real entrepreneurial passion play entrepreneurship, enhance the internal vitality and creativity. SI XING an construction, promoting the rule of law, tries to make the transformation of forest development XI General Secretary stressed, to reinvigorate Northeast China, optimized development environment is very important. Environment of rule of law most gather Moss, the most conducive to development. Improving the leading cadres using the method of thought and the rule of law Administration work, problem-solving, the ability to promote the development, is the key to promoting the rule of law. The law may affect the efficiency of out of the path of development will be more smooth, won development gains will be sustained, and end with greater efficiency. Leading cadres at all levels should take the lead in respect of law law, abide by, and actively foster Socialist culture, actively promoting the field of multi-level governance according to law, guide the masses and consciously abide by the law, failing to find law, solve the problem by law, in accordance with the law prevail. XXX administration by law of leading cadres do not exist on the rule of law, law enforcement, casual, and vow not to investors, the new scores and other turmoil. These important expositions on my district create good development environment with highly targeted and guidance, especially the General Secretary pointed out that the chaos in my area also exists to varying degrees, some even quite serious. Leading cadres at all levels must improve the development environment of rule of law as a fundamental task, adhere to the problem oriented, solid and solve the problems in the construction of rule of law, to rule the new effect for development environment improvements. To hold key minority. Leaders of this group, although few in number, but the effect is critical. If a local leaders take the lead right according to law, in accordance with the law, the local CPPCC fresh, pragmatic and efficient development environment. Conversely, if a local leaders of ignoring the law, impunity, not only the political environment will be destroyed, will have serious implications for the development environment. Now, some leading cadres lack of awareness on the importance of learning, that learn or not does not matter. Think efficiency is too low too much, act according to the procedure, than an executive order getting along with. In dealing with complex issues, often speak of settling and done; on the issue of handling letters and visits, like to spend money and buy stop and stable, but disregard the law administration, in accordance with the law, the rule六年级数学总复习教案数的运算教学目标：1结合生活中的具体情境，体会四则运算的意义；2在具体运算和解决简单实际问题的过程中，体会加与减、乘与除的互逆关系。3培养学生良好的学习习惯和独立思考的好习惯。教学重、难点：1体会四则运算的意义。2感受加与减、乘与除的互逆关系。教学过程：一、复习引入，回顾再现。（一）口算27+68=910540=1840=91070=780.8=37=6.30.1=3625%=48+6.52=1.020.43=（二）说说四则运算的意义二、合作探究（一）四则运算的意义1、根据这四副情境图，提出数学问题并加以解决。2、在小组内交流自己的问题和解决方法，说一说自己的理由。3、全班交流，说出自己的想法。第一幅图：两个同学一共折了多少只纸鹤？还要折多少只纸鹤？求和：39+2665（只）120-39-2655（只）120-（39+26）55（只）求剩余数可以用连减的方法，也可以用减去两数之和的方法。第二幅图：一共需要花费多少元？1.55278.5（元）求52个1.5是多少用乘法计算。第三幅图：捆扎礼品盒用多少米彩带？扎蝴蝶结用多少米彩带？181/3=6（米）181/2=9（米）一共用去多少米彩带？还剩下多少米彩带？18（1/3+1/2）=15（米）18-18（1/3+1/2）=3（米）或者18（1-1/3-1/2）=3（米）这几种方法基本上都是求一个数的几分之几是多少。第四幅图：每个小组有多少人？484=12（人）把一个数平均分成几份，一份是多少？这幅图上没有要求平均分，但是要想一想做游戏时怎么分最公平？还是平均分最公平。4、小结：同学们，我们刚才看图提问题并解答，做的非常好。在我们的生活中，经常会遇到这样的问题，就可以用这些知识来解决。5、自主练习：（1）你能说出下面各题分别用什么方法计算？只列算式不计算。六年级平均每班38人一共有六个班，六年级一共有多少人？教室长8米，宽6米，长比宽多多少米？我们班喜欢踢球的有8人，喜欢跳绳的人数是喜欢踢球的1.5倍，跳绳的有多少人？（2）根据算式写出两个减法算式。12+20=3232-12=20，32-20=12。根据这3个算式编写有联系的实际问题。例如：校园里有12棵杨树，20棵桐树，这两种树一共有多少棵？用加法6、回顾、总结学过的运算。在小学阶段我们学习过加、减、乘、除这几种运算，在生活中哪些地方能够用到乘法呢？（1）乘法：求几个几是多少；求一个数的几倍是多少；求长方形面积；求一个数的几分之几或百分之几是多少。（2）除法：把一个数平均分成若干份，求一份；求一个数里有几个另一个数；已知一个数的几分之几或百分之（3）加法：求和；减法逆运算。（4）减法：求剩余；比较；加法逆运算。三加减法、乘除法之间的关系（二）加减法关系、乘除法关系1、加减法之间的关系加数+加数=和一个加数=（）-（）被减数减数=差减数=（）-（）被减数=（）+（）（加减法之间有逆运算的关系）2、乘除法之间的关系因数因数=积一个因数=（）()被除数除数=商除数=()()被除数=()()(乘除法之间逆运算的关系)3、练习（1）校园里有12棵杨树，20棵桐树，这两种树一共有多少棵？用加法，而学校里杨树和桐树一共有32棵，其中杨树有12棵，桐树有多少棵？和学校里杨树和桐树一共有32棵，其中桐树有20棵，杨树有多少棵？这两个问题要用减法。（2）48个学生做游戏可以分成4个小组，每个小组多少人？用什么方法计算？（用除法）可是“每个小组有12个人，4个小组共有多少人？”用什么方法呢？（用乘法）三、作业设计（一）填一填200+80=0.54=280-80=20.5=280-200=2（）=0.5（二）根据题意列式计算1、2.5的10倍是多少？2、3.2是0.4的几倍？3、160的25%是多少？4、一个数的5倍是1.25，这个数是多少？5、两个因数的积是4.5，其中一个因数是0.5，另一个因数是多少？课后反思：运算的意义（第二课时）教学目标：1、在四则混合运算的练习过程中，回顾四则运算的意义2、总结四则运算过程中出现的几种特殊情况。（主要是0和1）教学重点：理解四则运算的意义。教学难点：四则运算算理的理解教学过程：一、复习铺垫（一）说说四则运算的意义（结合算是说明）1、1.5+3.6表示（）2、2.8-0.3表示（）3、2.54表示（）4、20表示（）5、100表示（）（二）说说加减法之间的关系，乘除法之间的关系乘法加法简便运算逆运算逆运算减法除法二、综合练习完成课本第65页1-4题三、课堂小结四、作业设计（一）只列式不计算1、35与43的和是多少？2、67与35的差是多少？3、25乘以4的积是多少？4、一个数的5%是15，这个数是多少5、35的16%是32是多少？（二）解决问题1商店里卖出4个蓝花瓶，每个24元；还卖出5个红花瓶，每个30元。(1)卖出两种花瓶一共收入多少元?(2)卖蓝花瓶比卖红花瓶少收人多少元?课后反思：整数、小数四则运算的意义和法则（第三课时）教学要求：1、使学生进一步认识整数四则运算的意义，正确掌握整数、小数四则运算的法则及整数计算法则与小数计算法则之间的联系，能正确地进行计算。2、使学生掌握加减法之间、乘除法之间的关系，并能应用这种关系进行验算。教学过程：一、揭示课题今天，我们复习整数和小数四则运算的意义和法则。(板书课题)通过复习，要加深认识四则运算的意义和计算法则，能正确地进行整数和小数的四则运算，并能验算。二、四则运算1、复习整数四则运算意义。提问：(1)通常所说的四则运算是指什么?(2)谁来说一说整数四则运算的意义各是怎样的?(3)举例说明，注意减法和乘法举例联系加法，除法举例联系乘法。2、提问：你能根据刚才整理的知识说一说整数四则运算之间的联系吗?3、做“练一练”364-26=54848=64515=44-15=1.252.4=51.7-50.8=+=4、小结整数加、减时，要注意把（）对齐。小数加、减时，要注意把（）对齐。分数加、减时，要注意当（）时，才能直接相加、减。三、混和运算1、填一填说说运算顺序（）和（）叫做第一级运算，（）和（）叫做第二级运算。在一个没有括号的算式里，如果只含有同一级运算，要（）依次计算；如果含有两级运算，要先做（）运算，后做（）运算。在一个有括号的算式里，要先算（）里面的，再算（）里面的。2、算一算710-184（7.5+2.5）0.255.418+1222.251.8+1.250.181-（+）36四、练一练120-36418+35（58+37）（64-95）(6.8-6.80.55)8.5（7.1-5.6）0.9-1.152.55.42.6（3.7-2.9）+0.62126（12-7.2）-61267.2-60.681.9+0.321.9五、全课小结六、作业设计1计算：2637851427514152412课后反思：整数、小数的运算定律和简便算法(第四课时)学习目标1、理解并掌握加法运算律和乘法运算律，并能够用字母来表示。2、能运用运算定律进行一些简便运算。3、能根据具体情况，选择算法，发展思维的灵活性。4、在数学活动中获得成功的体验，进一步增强对数学的兴趣和信心，进一步形成独立思考和探究问题的意识、习惯。教学过程一、复习导入。1、我们学过了哪些有关整数的运算律？（用提问的方式复习）2、它们有什么作用。二、运算定律（一）回顾和总结学过的整数运算律。1、加法交换律a+b=b+a2、加法结合律(a+b)+c=a+(b+c)3、乘法交换律ab=ba4、乘法结合律(ab)c=a(bc)5、乘法对加法的分配律。(a+b)c=ac+bc（二）用多种方式验证这些运算律。（完成58页第1题的第2小题，由学生自告奋勇回答书上的题目，由其他全体学生判断正确与否），（三）认识到整数运算律在小数、分数运算中仍然成立。（完成58页第2题，四人小组合作，互相举例说明，然后推选代表到讲台上展示）（四）感受在数系的扩充过程中，人们总是希望在新的数系中运算律能尽量地成立。三、练一练（一）、口算。722842581253410856440502727+68=910540=1840=91070=780.8=37=6.30.1=3625%=48+6.52=1.020.43=0.250.4=（二）说说下面题里的数有什么特点，怎样算简便。08460254125250849657046314371425993419849035246+32+540.7+3.9+4.3+6.3254948（325）8412.50.25546+785-146五、课堂小结这堂课复习了什么?通过复习你有哪些收获?指出：我们在式题计算时，要注意先看清题目，分析数据的特点。如果数据符合一些运算定律或规律，能用简便算法时一般应用简便算法，这样可以算得又对又快。六、布置作业24（）455637.50.375（+）-85（17）课后反思：简单应用题(第五课时)教学目标1使学生进一步掌握简单应用题的结构，能够根据四则运算的意义和题目中的数量关系正确选择解答方法2通过教学，进一步提高学生分析和解答应用题的能力3探索知识间的内在联系，激发学生的学习兴趣教学重点：掌握简单应用题的结构，正确解答简单应用题教学难点：掌握简单应用题的数量关系教学过程一、基本训练1口算2下面各题只列式不计算（1）六年级学生为灾区捐款，六年级1班捐款105元，六年级2班捐款98元两个班一共捐款多少元？（2）学校图书馆买来150本故事书，借给五年级1班48本，还剩多少本？（3）农具厂每天能够生产56件农具，7天能够生产多少件农具？（4）水果店有24筐苹果，要6天卖完，平均每天要卖多少筐苹果？（5）成绩展览会上要展出48本大字本，每张桌子上放8本，需要几张桌子？（6）五年级有学生136人，其中是女生，女生有多少人？二、归纳整理揭示课题：今天我们就来复习这样的简单应用题（板书：简单应用题的整理和复习）（一）某工厂有男工人364人，女工91人这个厂的男工和女工一共有多少人？教师提问：这道题有哪几个已知条件？问题是什么？问题与已知条件有什么关系？你为什么要这样回答？教师总结：这道题中，需要求的结果与两个已知条件直接相关只要把两个已知数合并起来，就可以直接计算出结果这是一道简单应用题（二）变式练习1改变问题：根据例1中的两个已知条件，你还能够提出其他问题，编成简单应用题吗？男工比女工多多少人？男工人数是女工人数的几倍？女工人数是男工人数的几分之几？2改变条件：根据上面编出的应用题和列出的算式，你能够分别调换每一道题中的已知条件和问题，各编成两道不同的简单应用题吗？某工厂男工和女工一共有455人，男工有364人，女工有多少人？某工厂男工和女工一共有455人，女工有91人，男工有多少人？某工厂有女工91人，男工比女工多273人，男工有多少人？某工厂女工比男工少273人，女工有91人，男工有多少人？某工厂有女工91人，男工人数是女工人数的4倍，男工有多少人？某工厂有男工364人，女工人数是男工人数的，女工有多少人？某工厂男工人数是女工人数的4倍，男工有364人，女工有多少人？某工厂有女工91人，女工人数是男工人数的，男工有多少人？教师总结：从以上的编题可以看出，简单应用题都是由两个已知条件和一个问题组成的，而且问题与两个已知条件都是直接相关的也就是说，都是可以由已知条件经过一步计算直接求出答案（三）复习已经学过的一些常见的数量关系通过例1我们已经研究了一些简单应用题的数量关系，下面我们再来复习一些常见的数量关系数量关系数量关系式收入、支出、结余收入支出结余单价、数量、总价单产量、数量、总产量速度、路程、时间工作效率、时间、工作总量本金、时间、利率、利息1请你们以小组为单位，先举例说明数量关系的意义，在填出每组数量中最基本的数量关系式2根据这些数量关系式你能够各编出三道不同的应用题吗？三、巩固反馈1解答下面的应用题解答后，再利用原题中的数量关系，编出两道与原题相连的应用题（1）某电视机制造厂平均每天制造电视机800台，20天能够制造电视机多少台？（2）学校用102元买来120个练习本，平均每个练习本多少元？2给下面各题补充上一个条件或者问题成为一步计算应用题，再解答（1）一批货物，运走10.5吨，_这批货物原来有多少吨？（2）修一条长3800米的水渠，_平均每天修多少米？（3）白羊只数的相当于黑羊的只数，_黑羊有多少只？（4）一列火车7小时行驶420千米，_？3解答下列应用题（1）一种毛线，每千克的价格是66.5元，买0.5千克应付多少元？（2）肖师傅一天共生产250个零件，经检验有225个是一级品，求一级品率四、课堂总结通过今天的学习，你有什么收获吗？五、家庭作业1丰华农场种玉米120公顷，种小麦的面积是玉米的倍种小麦的面积是多少公顷？2丰华农场种小麦165公顷，种玉米的面积是小麦种玉米多少公顷？3丰华农场种小麦165公顷，种小麦的面积是玉米的倍种玉米多少公顷？4丰华农场种玉米120公顷，种玉米的面积是小麦的种小麦多少公顷？六、板书设计简单应用题根据数量关系解决问题例1某工厂有男工364人，女工91人这个工厂的男工和女工一共有多少人？36491=455（人）答：这个工厂的男工和女工一共有455人改编：男工比女工多多少人？男工人数是女工人数的几倍？女工人数是男工人数的几分之几？教学反思：分数应用题(第六课时)教学目标1通过复习，使学生能够掌握分数应用题的数量关系，并能正确的解答2通过复习，培养学生的分析能力以及综合能力3通过复习，培养学生认真、仔细的学习习惯教学重点：通过复习，使学生能够掌握分数应用题的数量关系，并能正确的解答教学难点：通过复习，使学生能够掌握分数应用题的数量关系，并且能够数量、正确的解答教学过程一、复习准备老师这里有两个数，一个是6，另一个是3你能够用6与3提问并且进行回答吗？学生回答：（1）3是6的几分之几？（2）6是3的几倍？（3）3比6少几分之几？（4）6比3多几分之几？（5）6占6与3总和的几分之几？（6）3是6与3差的几倍？谈话导入：今天我们就来复习分数应用题（板书：分数应用题的复习）二、复习探讨（一）学校举办的美术展览中，有50幅水彩画，80幅蜡笔画_？1教师提问：根据已知条件，你都可以提出什么问题？并解答2反馈：（1）水彩画和蜡笔画共多少幅？（2）水彩画比笔画少多少幅？（3）蜡笔画比水彩画多几分之几？（4）水彩画比蜡笔画少几分之几？（5）水彩画是蜡笔画的几分之几？（6）蜡笔画是水彩画的几分之几？3教师质疑（1）5问和6问为什么解答方法不同？（单位1不同）（2）3问和4问的问题有什么不同？（单位1不同）（二）变式练习1学校举办的美术展览中，有50幅水彩画，蜡笔画比水彩画多，蜡笔画有多少幅？2学校举办的美术展览中，有80幅蜡笔画，蜡笔画比水彩画多，水彩画和蜡笔画一共有多少幅？（1）学生独立解答（2）学生讨论两道题的区别教师总结：看来我们做分数应用题时，需要认真审题并且在找准单位1的同时注意找准对应关系（三）深化练习1仓库里有15吨钢材，第一次用去总数的20，第二次用去总数的，还剩下多少吨钢材？2仓库里有一些钢材，第一次用去总数的20，第二次用去总数的，还剩下15吨，仓库里有多少吨钢材？（1）学生独立解答（2）学生讨论两道题的区别教师总结：虽然分数应用题与百分数应用题在表现形式上不同，但是数量关系相同同样需要注意认真审题并且在