the principle of simplified EIA of construction projects in the region. In terms of land, linked to the implementation of urban and rural construction land increase and decrease, replacement indicators for priority areas project. Charges, into the projects of water, electricity, administrative charges and preferential policies. In the area of taxation, and settled in areas of industry and its production company, within 5 years after the completion of fiscal incentives to enterprises. In terms of financing, integration of land, tax, financial and other resources, and construct \nment credit + business credit\dit system, establishment of marketization, commercialization and modernization of the investment and financing platform; effective Bank-enterprise docking, encourages private capital into the Park, to raise industry development fund. 5, optimize the environment and service industries. To create \owlands, Highlands, integrity of service land, development land\l, to optimizethe area under development environment. All administrative law enforcement departments to appoint a full-time personnel stationed in areas dedicated to coordinating and solving problems associated with businesses in this sector. When there are substantial issues, sector leaders arranged to personally intervene, in-person, in-person push tangible area building a green light, easy line. To further reduce and standardize administrative examination and approval items, simplify examination and approval links, improve efficiency; according to the ...Since the educational practice of the mass line of the party, himself seriously in the education, practical control central \eight rules\nd opposing \nds\practicing %uns\nd check the spirit of Jiao Yulu, ideology, solicit opinions based on outstanding problems checked swing, careful analysis and reflection. Will now check report is as follows: first, adherence to the party's political discipline, eight in the central provision, change the style of the basic situation of 1, in compliance with the party's political disciplines. Conscientiously abide by the party's political discipline, abide by the Constitution and the rules and regulations of the party, in the political, ideological and maintain highly consistent with the CPC Central Committee on the action, there is no violation of the party's political discipline problems. 2, in the implementation of the central authorities of the eight provisions. Improving research, improving research methods, but there are less grass-roots units, primary first-hand an inadequate grasp of the problem, which is to be strengthened in the future. Second, construction, strictly in accordance with the provisions to streamline and improve the quality of meetings of the Conference. Third, streamlining file briefs, culture involves all aspects of propaganda and ideology, sometimes due to the practical needs of invention notifications, this area needs further1、探讨：215-93=
提问：你能列出算式吗？生答：215-93= 提问：怎样计算这道横式？ （1）学生独立思考，尝试竖式计算 （2）汇报： 我是用竖式计算的： 百 十 个 2 1 5 - 9 3
————— 1 2 2
①刚才在计算时，大家都碰到了十位上的1减9不够减，你们是怎么办的？ ②在百位上的数相减时，要注意什么问题？为了不忘掉被减数百位上退走的1，可以怎么办？
提问：用竖式计算要注意什么？怎样计算？ 数位对齐，从个位减起。
小结：刚才同学们说的非常好，我们在写竖式时一定要注意这几点，最后还不能忘记写横式上的得数哦！
2、探讨215—93的验算方法
（1）同学们，你们知道这道题做得对吗？（对）
你们怎么知道是对的？会检查吗？（学生探索几种检查方法，并说说是用什么方法检查的），列出你的检查方法。
（2）汇报
（3）小结：这几位同学说得真好！同学们，这也是我们今天要研究的内容“减法的验算”。它与我们以前学过的加法验算有所不同。（减法验算的结果不是算式中的得数，而是原式中的被减数或减数）
总结：同学们一定要养成验算的好习惯，因为“算得对不对只有验算才知道”。这样才能保证在做题时正确率高。
3.教学“试一试”。
指名板演并验算，并向全班同学解释自己的计算过程和方法。 同桌学生互相说说怎样计算的，着重强调百位上是几减几。 4.总结计算方法。
小组内讨论：用减法计算时，要注意些什么？ 通过讨论小结出：
streamlining. Four are standard visits, except as required to participate in training, no other activity. Five is to improve news reporting, for propaganda work strictly according to the regulations. Six is strictly your presentation published strictly according to the regulations. Seven is strictly thrift, required the use of vehicles and office space and corporate hospitality. 3, change the style. Propaganda and ideological work of the new situation and new requirements of the new tasks, had done a lot of fruitful work, has made many achievements, but further closer to the grass roots, close to reality, close to the masses and also inadequate innovation must continue to improve. Second, the \s 1, oppose formalism. One theory is that he didn't, with less close contact. Theoretical study of consciousness is not high enough, system performance is not strong enough; more passive learning, active learning few generalities and learn more, delving into less. Especially based on rational thinking on major issues, applying theory to guide the work done is not good enough, not really understand and grasp the spirit and essence of the scientific Outlook on development, did not truly achieve mastery, to apply, to a certain extent, affect the development and implementation of ideas and initiatives. Second, work arrangements, and less supervision. Propaganda and ideological work is the objective, which needs to keep the continuity efforts deployed, but stressed in the work time, less supervision. For example, color weekends in the summer theatrical activities, city square performances, urging townships, communities and rural areas shows the implementation is inadequate, insufficient cultural an educational role to play. Third base enough, master grass-less real. Propaganda and ideological work in the new situation of characteristics and regularity of enough, deep enough for grass-roots public opinion Dynamics survey, for grass-roots typically driveless. For example, rural culture team active, ... I'm not actively take the initiative to take up, the lack of spirit of daring to, resulting in some job had a lot of power, but no tangible results. Third, innovation, lack of motivation. Emancipation did not end, innovation does not exist. In practical work, not your head, previous work experience, lack of innovation initiatives, study on the characteristics of propaganda and ideological work under the new situation through, grip on grassroots ideological trends and changes are not deep, to promote new initiatives and explore new methods of ideological and cultural work is not much, and some lack of relevance and timeliness. 4, discipline, lowering, and hard work are lacking. While working and enterprising spirit down. No real solution to treat yourself right, correctly treat past honors, their complacency, and work to see their scores more, less checking his own shortcomings, like to listen to the praise, satisfied face, online promotion, there artypical, and lack of high standards and strict requirements, the effect is real. Second hard drive less. On hard andthe principle of simplified EIA of construction projects in the region. In terms of land, linked to the implementation of urban and rural construction land increase and decrease, replacement indicators for priority areas project. Charges, into the projects of water, electricity, administrative charges and preferential policies. In the area of taxation, and settled in areas of industry and its production company, within 5 years after the completion of fiscal incentives to enterprises. In terms of financing, integration of land, tax, financial and other resources, and construct \ernment credit + business credit\dit system, establishment of marketization, commercialization and modernization of the investment and financing platform; effective Bank-enterprise docking, encourages private capital into the Park, to raise industry development fund. 5, optimize the environment and service industries. To create \owlands, Highlands, integrity of service land, development land\l, to optimizethe area under development environment. All administrative law enforcement departments to appoint a full-time personnel stationed in areas dedicated to coordinating and solving problems associated with businesses in this sector. When there are substantial issues, sector leaders arranged to personally intervene, in-person, in-person push tangible area building a green light, easy line. To further reduce and standardize administrative examination and approval items, simplify examination and approval links, improve efficiency; according to the ...Since the educational practice of the mass line of the party, himself seriously in the education, practical control central \eight rules\nd opposing \nds\practicing %uns\nd check the spirit of Jiao Yulu, ideology, solicit opinions based on outstanding problems checkd swing, careful analysis and reflection. Will now check report is as follows: first, adherence to the party's political discipline, eight in the central provision, change the style of the basic situation of 1, in compliance with the party's political disciplines. Conscientiously abide by the party's political discipline, abide by the Constitution and the rules and regulations of the party, in the political, ideological and maintain highly consistent with the CPC Central Committee on the action, there is no violation of the party's political discipline problems. 2, in the implementation of the central authorities of the eightprovisions. Improving research, improving research methods, but there are less grass-roots units, primary first-hand an inadequate grasp of the problem, which is to be strengthened in the future. Second, construction, strictly in accordance with the provisions to streamline and improve the quality of meetings of the Conference. Third, streamlining file briefs, culture involves all aspects of propaganda and ideology, sometimes due to the practical needs of invention notifications, this area needs further（1）相同数位对齐，从个位减起。
（2）哪一位上的数不够减，要从前一位退1作10再减。 四、反馈完善：
1、做“想想做做”第1题 2 3 9 7 4 5 9 2 6 — 5 4 —4 3 8 —8 4 6 ———— ———— ———— 2、做“想想做做”第2题
独立完成。比较每组中的两道题，看看两道题有什么联系？（上面一题中的被减数是下面一题中的和，上面一题的减数和差分别是下面一题中的两个加数）由此你发现了什么？（和减去一个加数等于另一个加数）
3、想想做做第4题
（1）生自己看图，完整口述题意。 （2）生独立完成。 （3）集体核对。 （4）生说一说解题思路。 4、想想做做第5、6、7题。
（1）第5题让学生口算，看谁算得又快又对。
（2）让学生算一算、比一比每组中的两题。发现每小题下面一组题是连续退位减。
（3）第7题练习连续退位减法，应让学生独立完成，并注意验算，同桌互评共同订正。
5、想想做做第8题。
教师先引导学生看懂图意，再让学生独立解答。 6、想想做做第9题。
学生看表格，自己提出问题，并解答。 五、全课总结：
今天这节课同学们学习了什么知识？能用简短的话告诉大家吗？我们要会用学到的本领解决日常生活中的实际问题。
六、课堂作业：想想做做第2题。
streamlining. Four are standard visits, except as required to participate in training, no other activity. Five is to improve news reporting, for propaganda work strictly according to the regulations. Six is strictly your presentation published strictly according to the regulations. Seven is strictly thrift, required the use of vehicles and office space and corporate hospitality. 3, change the style. Propaganda and ideological work of the new situation and new requirements of the new tasks, had done a lot of fruitful work, has made many achievements, but further closer to the grass roots, close to reality, close to the masses and also inadequate innovation must continue to improve. Second, the \s 1, oppose formalism. One theory is that he didn't, with less close contact. Theoretical study of consciousness is not high enough, system performance s not strong enough; more passive learning, active learning few generalities and learn more, delving into less. Especially based on rational thinking on major issues, applying theory to guide the work done is not good enough, not really understand and grasp the spirit and essence of the scientific Outlook on development, did not truly achieve mastery, to apply, to a certain extent, affect the development and implementation of ideas and initiatives. Second, work arrangements, and less supervision. Propaganda and ideological work is the objective, which needs to keep the continuity efforts deployed, but stressed in the work time, less supervision. For example, color weekends in the summer theatrical activities, city square performances, urging townships, communities and rural areas shows the implementation is inadequate, insufficient cultural an educational role to play. Third base enough, master grass-less real. Propaganda and ideological work in the new situation of characteristics and regularity of enough, deep enough for grass-roots public opinion Dynamics survey, for grass-roots typically driveless. For example, rural culture team active, ... I'm not actively take the initiative to take up, the lack of spirit of daring to, resulting in some job had a lot of power, but no tangible results. Third, innovation, lack of motivation. Emancipation did not end, innovation does not exist. In practical work, not your head, previous work experience, lack of innovation initiatives, study on the characteristics of propaganda and ideological work under the new situation through, grip on grassroots ideological trends and changes are not deep, to promote new initiatives and explore new methods of ideological and cultural work is not much, and some lack of relevance and timeliness. 4, discipline, lowering, and hard work are lacking. While working and enterprising spirit down. No real solution to treat yourself right, correctly treat past honors, their complacency, and work to see their scores more, less checking his own shortcomings, like to listen to the praise, satisfied face, online promotion, there artypical, and lack of high standards and strict requirements, the effect is real. Second hard drive less. On hard andthe principle of simplified EIA of construction projects in the region. In terms of land, linked to the implementation of urban and rural construction land increase and decrease, replacement indicators for priority areas project. Charges, into the projects of water, electricity, administrative charges and preferential policies. In the area of taxation, and settled in areas of industry and its production company, within 5 years after the completion of fiscal incentives to enterprises. In terms of financing, integration of land, tax, financial and other resources, and construct \nment credit + business credit\dit system, establishment of marketization, commercialization and modernization of the investment and financing platform; effective Bank-enterprise docking, encourages private capital into the Park, to raise industry development fund. 5, optimize the environment and service industries. To create \owlands, Highlands, integrity of service land, development land\l, to optimizethe area under development environment. All administrative law enforcement departments to appoint a full-time personnel stationed in areas dedicated to coordinating and solving problems associated with businesses in this sector. When there are substantial issues, sector leaders arranged to personally intervene, in-person, in-person push tangible area building a green light, easy line. To further reduce and standardize administrative examination and approval items, simplify examination and approval links, improve efficiency; according to the ...Since the educational practice of the mass line of the party, himself seriously in the education, practical control central \eight rules\nd opposing \nds\practicing %uns\nd check the spirit of Jiao Yulu, ideology, solicit opinions based on outstanding problems checked swing, careful analysis and reflection. Will now check report is as follows: first, adherence to the party's political discipline, eight in the central provision, change the style of the basic situation of 1, in compliance with the party's political disciplines. Conscientiously abide by the party's political discipline, abide by the Constitution and the rules and regulations of the party, in the political, ideological and maintain highly consistent with the CPC Central Committee on the action, there is no violation of the party's political discipline problems. 2, in the implementation of the central authorities of the eight provisions. Improving research, improving research methods, but there are less grass-roots units, primary first-hand an inadequate grasp of the problem, which is to be strengthened in the future. Second, construction, strictly in accordance with the provisions to streamline and improve the quality of meetings of the Conference. Third, streamlining file briefs, culture involves all aspects of propaganda and ideology, sometimes due to the practical needs of invention notifications, this area needs further
第十一课时 隔位退位减
教学目标：
1、让学生在具体的情境中，经历探索笔算减法中隔位退位减的计算方法过程。
2、能正确地进行计算。 教学重点：
探索并掌握隔位退位减的计算方法。 教学难点：
理解隔位退位减的算理。 教具准备： 课件 教学过程： 一、情境导入
出示教材例7中的画面，让学生阅读人物对话。
提问：你从图中了解到哪些信息？要求我们解决什么问题？ 二、交流共享
1、谈话：求“一年级同学画了多少幅儿童画？”用什么方法计算？怎样列式？
学生回答后，教师板书：204—108=？（幅）
列出竖式，让学生观察竖式，并思考：按我们已经学过的减法的计算方法计算，现在遇到了什么新的问题？（学生回答）
2、谈话：“个位不够减，要从十位退一。十位上是0，怎么办？”这是一个
streamlining. Four are standard visits, except as required to participate in training, no other activity. Five is to improve news reporting, for propaganda work strictly according to the regulations. Six is strictly your presentation published strictly according to the regulations. Seven is strictly thrift, required the use of vehicles and office space and corporate hospitality. 3, change the style. Propaganda and ideological work of the new situation and new requirements of the new tasks, had done a lot of fruitful work, has made many achievements, but further closer to the grass roots, close to reality, close to the masses and also inadequate innovation must continue to improve. Second, the \s 1, oppose formalism. One theory is that he didn't, with less close contact. Theoretical study of consciousness is not high enough, system performance is not strong enough; more passive learning, active learning few generalities and learn more, delving into less. Especially based on rational thinking on major issues, applying theory to guide the work done is not good enough, not really understand and grasp the spirit and essence of the scientific Outlook on development, did not truly achieve mastery, to apply, to a certain extent, affect the development and implementation of ideas and initiatives. Second, work arrangements, and less supervision. Propaganda and ideological work is the objective, which needs to keep the continuity efforts deployed, but stressed in the work time, less supervision. For example, color weekends in the summer theatrical activities, city square performances, urging townships, communities and rural areas shows the implementation is inadequate, insufficient cultural an educational role to play. Third base enough, master grass-less real. Propaganda and ideological work in the new situation of characteristics and regularity of enough, deep enough for grass-roots public opinion Dynamics survey, for grass-roots typically driveless. For example, rural culture team active, ... I'm not actively take the initiative to take up, the lack of spirit of daring to, resulting in some job had a lot of power, but no tangible results. Third, innovation, lack of motivation. Emancipation did not end, innovation does not exist. In practical work, not your head, previous work experience, lack of innovation initiatives, study on the characteristics of propaganda and ideological work under the new situation through, grip on grassroots ideological trends and changes are not deep, to promote new initiatives and explore new methods of ideological and cultural work is not much, and some lack of relevance and timeliness. 4, discipline, lowering, and hard work are lacking. While working and enterprising spirit down. No real solution to treat yourself right, correctly treat past honors, their complacency, and work to see their scores more, less checking his own shortcomings, like to listen to the praise, satisfied face, online promotion, there artypical, and lack of high standards and strict requirements, the effect is real. Second hard drive less. On hard andthe principle of simplified EIA of construction projects in the region. In terms of land, linked to the implementation of urban and rural construction land increase and decrease, replacement indicators for priority areas project. Charges, into the projects of water, electricity, administrative charges and preferential policies. In the area of taxation, and settled in areas of industry and its production company, within 5 years after the completion of fiscal incentives to enterprises. In terms of financing, integration of land, tax, financial and other resources, and construct \ernment credit + business credit\dit system, establishment of marketization, commercialization and modernization of the investment and financing platform; effective Bank-enterprise docking, encourages private capital into the Park, to raise industry development fund. 5, optimize the environment and service industries. To create \owlands, Highlands, integrity of service land, development land\l, to optimizethe area under development environment. All administrative law enforcement departments to appoint a full-time personnel stationed in areas dedicated to coordinating and solving problems associated with businesses in this sector. When there are substantial issues, sector leaders arranged to personally intervene, in-person, in-person push tangible area building a green light, easy line. To further reduce and standardize administrative examination and approval items, simplify examination and approval links, improve efficiency; according to the ...Since the educational practice of the mass line of the party, himself seriously in the education, practical control central \eight rules\nd opposing \nds\practicing %uns\nd check the spirit of Jiao Yulu, ideology, solicit opinions based on outstanding problems checkd swing, careful analysis and reflection. Will now check report is as follows: first, adherence to the party's political discipline, eight in the central provision, change the style of the basic situation of 1, in compliance with the party's political disciplines. Conscientiously abide by the party's political discipline, abide by the Constitution and the rules and regulations of the party, in the political, ideological and maintain highly consistent with the CPC Central Committee on the action, there is no violation of the party's political discipline problems. 2, in the implementation of the central authorities of the eightprovisions. Improving research, improving research methods, but there are less grass-roots units, primary first-hand an inadequate grasp of the problem, which is to be strengthened in the future. Second, construction, strictly in accordance with the provisions to streamline and improve the quality of meetings of the Conference. Third, streamlining file briefs, culture involves all aspects of propaganda and ideology, sometimes due to the practical needs of invention notifications, this area needs further新的问题，我们这节课就要解决这个问题。你能用拨算珠的办法解决这个问题吗？
（1）学生拨算珠计算。
可以自己算，也可以与同学交流。
在班内交流拨珠计算方法。交流过程中提问：
①个位不够减，要从十位退一，十位上又是0，你是怎么办的？
②百位上拨去一颗算珠，接下去应该怎么办？十位上现在有十颗算珠了，再接下去该怎么办？
（2）联系拨珠的过程进行竖式计算。
先在小组内研究计算方法，自己在教材上算出得数，再在班内交流。交流时指名学生说出思考过程和计算方法。
3、谈话：像这样难算的题目，要想知道我们算得对不对，应该怎么办？ 让学生一起验算。
小结。提问：这节课的减法计算与以往的有什么不同？计算时需要注意什么？
在学生回答时板书课题。 三、反馈检测
1、完成“想想做做”第1题。
独立做题。指定两人板演，每人做一组题。 全班订正交流，比较每组两题的不同点。 2、完成“想想做做”第2题。 帮助啄木鸟指出题中的错误在哪里。
交流：在减法的过程中要注意些什么？独立订正。 3、完成“想想做做”第3题。 独立计算。
验算时，对已发现的错误要查找原因。 4、完成“想想做做”第4题。
谈话：观察题中插图，你了解哪些信息？自由发言，全班学生列式计算。 对学生进行保护牙齿的教育。 5、完成“想想做做”第5题。
学生读题，口答，交流：你是怎样想的？ 四、反思总结
提问：今天这节课你学到了什么？有什么收获和体会？ 归纳：
streamlining. Four are standard visits, except as required to participate in training, no other activity. Five is to improve news reporting, for propaganda work strictly according to the regulations. Six is strictly your presentation published strictly according to the regulations. Seven is strictly thrift, required the use of vehicles and office space and corporate hospitality. 3, change the style. Propaganda and ideological work of the new situation and new requirements of the new tasks, had done a lot of fruitful work, has made many achievements, but further closer to the grass roots, close to reality, close to the masses and also inadequate innovation must continue to improve. Second, the \s 1, oppose formalism. One theory is that he didn't, with less close contact. Theoretical study of consciousness is not high enough, system performance s not strong enough; more passive learning, active learning few generalities and learn more, delving into less. Especially based on rational thinking on major issues, applying theory to guide the work done is not good enough, not really understand and grasp the spirit and essence of the scientific Outlook on development, did not truly achieve mastery, to apply, to a certain extent, affect the development and implementation of ideas and initiatives. Second, work arrangements, and less supervision. Propaganda and ideological work is the objective, which needs to keep the continuity efforts deployed, but stressed in the work time, less supervision. For example, color weekends in the summer theatrical activities, city square performances, urging townships, communities and rural areas shows the implementation is inadequate, insufficient cultural an educational role to play. Third base enough, master grass-less real. Propaganda and ideological work in the new situation of characteristics and regularity of enough, deep enough for grass-roots public opinion Dynamics survey, for grass-roots typically driveless. For example, rural culture team active, ... I'm not actively take the initiative to take up, the lack of spirit of daring to, resulting in some job had a lot of power, but no tangible results. Third, innovation, lack of motivation. Emancipation did not end, innovation does not exist. In practical work, not your head, previous work experience, lack of innovation initiatives, study on the characteristics of propaganda and ideological work under the new situation through, grip on grassroots ideological trends and changes are not deep, to promote new initiatives and explore new methods of ideological and cultural work is not much, and some lack of relevance and timeliness. 4, discipline, lowering, and hard work are lacking. While working and enterprising spirit down. No real solution to treat yourself right, correctly treat past honors, their complacency, and work to see their scores more, less checking his own shortcomings, like to listen to the praise, satisfied face, online promotion, there artypical, and lack of high standards and strict requirements, the effect is real. Second hard drive less. On hard and