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首页 北师大版二年级下册数学教案全册教案

北师大版二年级下册数学教案全册教案.doc

北师大版二年级下册数学教案全册教案

妄自菲薄的你
2018-07-17 0人阅读 举报 0 0 暂无简介

简介:本文档为《北师大版二年级下册数学教案全册教案doc》,可适用于领域

北师大版二年级下册数学教案全册教案一、除法一、教学内容:P~P二、教学要求:、引导学生经历分苹果等实际操作初步体会有余数除法与生活的密切联系并能结合实际操作体会应用。、使学生体验除式与竖式的计算过程能正确掌握商是一位数的除法的竖式书写格式。、探索有余数除法的试商方法体会到余数一定比除数少的计算办法体会到余数一定比除数少。三、教学重难点:、使学生体会除法的意义及除法竖式的计算过程。、引导学生在实际操作中体会把一些物品平均分后有余数体会余数要比除数小。、使学生理解和掌握有余数除法的试商方法是本单元教学的难点。四、教学时数:课时五、教学进度:第~周thanmonths,highearlystrengthcementuptomonth,andbaggedthestackingheightofnomorethanbagsofcement()water)canbeusedwheresuitablefordrinkingwater,untreatedindustrialwastewatercannotbeused)waterusedinmixingthesubstancescontainedcannotaffecttheworkabilityandstrengthandgrowthandcausecorrosionofsteelandconcrete)waterPHvalue,insolubleandsolublesulfides,chlorides,phosphates,provisionsconsistentwiththefollowingtableofcontentsContentlimitstableentryofprestressedconcreteconcreteconcreteinsolublematterinPHvalue>>>mgL<<<mgL<<<chloridesolublematter(measuredinCL)mgL<<<sulfate(SOdollars)mgL<<<sulfide(Sdollars)mgL<()Aggregate)aggregatesofdifferentmaterialdiameterpiledup,respectively,donotmixwitheachotherandmixedwiththesoilwhenloadinganwiththesoilwhenloadingandunloading,sizecoarseaggregatenetfallofgreaterthanmmlessthanM,andavoidseriousaggregatecrushing)fineaggregatefinenessmodulusshouldbecontrolledintheMaximumwatercementratioconcreteparameterofconcretewatercementratiothemaximumallowablevalue,abovethewaterleveldownstream(outsideofthedam),downstreamwaterlevelchange(outsideofthedam)minimumlevelofupstreamanddownstream(outsideofthedam)basissubjecttowatererosionparts()largevolumebuildingswithinconcreteofminimumamountofcementitiousmaterialtestresultssubmittedtotheengineerAccordingtothecharacteristicsofthebuildings,steelcontent,methodoftransport,pouringconcrete,andclimaticconditions,asfaraspossiblesmallslump()thisstandardconcretecollapsedegreesaccordingtoXiatableselectedcollapsedegreesparametertablebuildingsofnaturestandardroundcollapsedegrees(cm)hydraulicpigmentconcreteorlessreinforcedconcrete~distributionreinforcedratenotoverofreinforcedconcrete~distribution小组交流指名回答。、认识统计图、统计表的作用。三、小调查刚才我们已经认识到了统计图表对于我们解决生活中的实际问题有很大帮助。下面我们就来实际地体会一下。请同学们看大屏幕我们要进行调查的一些简单要求。(大屏幕显示)、以小组为单位调查你们小组同学的睡眠时间。、用你喜欢的方法作记录。、根据你的记录制作统计表、统计图。、组内交流你的统计图表。并选出代表汇报。全班汇报、交流。四、全课总结你今天有哪些收获,统计讨论一、教学内容:P~二、教学目标:、让学生进一步学会从统计图表中获取信息培养学生收集信息的能thanmonths,highearlystrengthcementuptomonth,andbaggedthestackingheightofnomorethanbagsofcement()water)canbeusedwheresuitablefordrinkingwater,untreatedindustrialwastewatercannotbeused)waterusedinmixingthesubstancescontainedcannotaffecttheworkabilityandstrengthandgrowthandcausecorrosionofsteelandconcrete)waterPHvalue,insolubleandsolublesulfides,chlorides,phosphates,provisionsconsistentwiththefollowingtableofcontentsContentlimitstableentryofprestressedconcreteconcreteconcreteinsolublematterinPHvalue>>>mgL<<<mgL<<<chloridesolublematter(measuredinCL)mgL<<<sulfate(SOdollars)mgL<<<sulfide(Sdollars)mgL<()Aggregate)aggregatesofdifferentmaterialdiameterpiledup,respectively,donotmixwitheachotherandmixedwiththesoilwhenloadingandunloading,sizecoarseaggregatenetfallofgreaterthanmmlessthanM,andavoidseriousaggregatecrushing)fineaggregatefinenessmodulusshouldbecontrolledintheMaximumwatercementratioconcreteparameterofconcretewatercementratiothemaximumallowablevalue,abovethewaterleveldownstream(outsideofthedam),downstreamwaterlevelchange(outsideofthedam)minimumlevelofupstreamanddownstream(outsideofthedam)basissubjecttowatererosionparts()largevolumebuildingswithinconcreteofminimumamountofcementitiousmaterialtestresultssubmittedtotheengineerAccordingtothecharacteristicsofthebuildings,steelcontent,methodoftransport,pouringconcrete,andclimaticconditions,asfaraspossiblesmallslump()thisstandardconcretecollapsedegreesaccordingtoXiatableselectedcollapsedegreesparametertablebuildingsofnaturestandardroundcollapsedegrees(cm)hydraulicpigmentconcreteorlessreinforcedconcrete~distributionreinforcedratenotoverofreinforcedconcrete~distribution力。、使学生学会根据统计图表中的数据回答简单的问题并作出简单的预测。、发展学生提出问题和解决问题的能力。三、教学准备:电脑课件四、教学过程:(一)谈话引入今天这节课我们将以讨论的方式继续深入认识统计图表。(二)探索新知课件显示如下统计表和讨论个小问题()身高和年龄有什么关系,()什么年龄长得最快,什么年龄长得最慢,()预测到岁时小军可能有多高,()你还能提出哪些数学问题,、读懂统计表、小组内讨论交流以上()、()、()、()四个小问题。、全班交流()小军的身高随年龄增长而增高()通过计算知道:~岁高cm、~岁高cm„„~岁长得最快~岁长得最慢()预计岁时高cm有=cm(三)、巩固练习书P“练一练”练习题、指导学生读懂统计图、讨论以下三个问题:()哪天卖得多哪天卖得少,()一周内大约卖了多少台,()预测接下来的周六、周日、周一可能卖多少台,、全班交流(四)、统计实践活动、制成统计表thanmonths,highearlystrengthcementuptomonth,andbaggedthestackingheightofnomorethanbagsofcement()water)canbeusedwheresuitablefordrinkingwater,untreatedindustrialwastewatercannotbeused)waterusedinmixingthesubstancescontainedcannotaffecttheworkabilityandstrengthandgrowthandcausecorrosionofsteelandconcrete)waterPHvalue,insolubleandsolublesulfides,chlorides,phosphates,provisionsconsistentwiththefollowingtableofcontentsContentlimitstableentryofprestressedconcreteconcreteconcreteinsolublematterinPHvalue>>>mgL<<<mgL<<<chloridesolublematter(measuredinCL)mgL<<<sulfate(SOdollars)mgL<<<sulfide(Sdollars)mgL<()Aggregate)aggregatesofdifferentmaterialdiameterpiledup,respectively,donotmixwitheachotherandmixedwiththesoilwhenloadingandunloading,sizecoarseaggregatenetfallofgreaterthanmmlessthanM,andavoidseriousaggregatecrushing)fineaggregatefinenessmodulusshouldbecontrolledintheMaximumwatercementratioconcreteparameterofconcretewatercementratiothemaximumallowablevalue,abovethewaterleveldownstream(outsideofthedam),downstreamwaterlevelchange(outsideofthedam)minimumlevelofupstreamanddownstream(outsideofthedam)basissubjecttowatererosionparts()largevolumebuildingswithinconcreteofminimumamountofcementitiousmaterialtestresultssubmittedtotheengineerAccordingtothecharacteristicsofthebuildings,steelcontent,methodoftransport,pouringconcrete,andclimaticconditions,asfaraspossiblesmallslump()thisstandardconcretecollapsedegreesaccordingtoXiatableselectedcollapsedegreesparametertablebuildingsofnaturestandardroundcollapsedegrees(cm)hydraulicpigmentconcreteorlessreinforcedconcrete~distributionreinforcedratenotoverofreinforcedconcrete~distribution、制成统计图、展示学生填写的统计图表、讨论、交流、质疑、解惑(五)、全课总结实验是进行科学研究的很重要的途径科学家的许多发明、创造是从无数次的科学实验中获得的所以我们从小要学会做一些简单的科学实验。、按实验要求认真进行实验的全过程如定时观察、定时记录有关数据等。、要持之以恒遇到困难不要泄气能虚心请教他人。、能灵活统计表示实验中的相关数据、„„(六)作业选用随堂练习作业十、总复习一、教学内容:本单元及本册教材所涉及的知识为复习内容二、重点、难点、关键thanmonths,highearlystrengthcementuptomonth,andbaggedthestackingheightofnomorethanbagsofcement()water)canbeusedwheresuitablefordrinkingwater,untreatedindustrialwastewatercannotbeused)waterusedinmixingthesubstancescontainedcannotaffecttheworkabilityandstrengthandgrowthandcausecorrosionofsteelandconcrete)waterPHvalue,insolubleandsolublesulfides,chlorides,phosphates,provisionsconsistentwiththefollowingtableofcontentsContentlimitstableentryofprestressedconcreteconcreteconcreteinsolublematterinPHvalue>>>mgL<<<mgL<<<chloridesolublematter(measuredinCL)mgL<<<sulfate(SOdollars)mgL<<<sulfide(Sdollars)mgL<()Aggregate)aggregatesofdifferentmaterialdiameterpiledup,respectively,donotmixwitheachotherandmixedwiththesoilwhenloadingandunloading,sizecoarseaggregatenetfallofgreaterthanmmlessthanM,andavoidseriousaggregatecrushing)fineaggregatefinenessmodulusshouldbecontrolledintheMaximumwatercementratioconcreteparameterofconcretewatercementratiothemaximumallowablevalue,abovethewaterleveldownstream(outsideofthedam),downstreamwaterlevelchange(outsideofthedam)minimumlevelofupstreamanddownstream(outsideofthedam)basissubjecttowatererosionparts()largevolumebuildingswithinconcreteofminimumamountofcementitiousmaterialtestresultssubmittedtotheengineerAccordingtothecharacteristicsofthebuildings,steelcontent,methodoftransport,pouringconcrete,andclimaticconditions,asfaraspossiblesmallslump()thisstandardconcretecollapsedegreesaccordingtoXiatableselectedcollapsedegreesparametertablebuildingsofnaturestandardroundcollapsedegrees(cm)hydraulicpigmentconcreteorlessreinforcedconcrete~distributionreinforcedratenotoverofreinforcedconcrete~distribution、重点:()引导学生进一步巩固万以内加减法及连加、连减和混合运算的计算方法。()使学生进一步认识“先乘除后加减”以及带有小括号的混合运算的顺序。()引导学生进一步认识和运用所学知识解决一些简单的实际问题。、难点:()提高学生计算的准确性。()使学生对所学知识能加深理解并融会贯通。()引导学生运用所学知识解决一些简单的实际问题。、关键:()要重视学生的情感体验采用多种形式调动学生学习的积极性。()要重视学生的差异对学习有困难的学生有针对性地提供辅导帮助他们树立自信心使所有学生都能树立自信心有进一步发展。三、教学要求:、使学生进一步巩固本学期所学的知识加深对这些知识的理解提高掌握水平。、进一步提高学生的计算能力发展初步空间观念和抽象概括能力。、让学生体验成功的快乐树立学好数学的自信心。四、课时划分:课时五、教学进度:第~周数与代数一、复习内容:P~总复习中的、、、、、、题二、教学目标:thanmonths,highearlystrengthcementuptomonth,andbaggedthestackingheightofnomorethanbagsofcement()water)canbeusedwheresuitablefordrinkingwater,untreatedindustrialwastewatercannotbeused)waterusedinmixingthesubstancescontainedcannotaffecttheworkabilityandstrengthandgrowthandcausecorrosionofsteelandconcrete)waterPHvalue,insolubleandsolublesulfides,chlorides,phosphates,provisionsconsistentwiththefollowingtableofcontentsContentlimitstableentryofprestressedconcreteconcreteconcreteinsolublematterinPHvalue>>>mgL<<<mgL<<<chloridesolublematter(measuredinCL)mgL<<<sulfate(SOdollars)mgL<<<sulfide(Sdollars)mgL<()Aggregate)aggregatesofdifferentmaterialdiameterpiledup,respectively,donotmixwitheachotherandmixedwiththesoilwhenloadingandunloading,sizecoarseaggregatenetfallofgreaterthanmmlessthanM,andavoidseriousaggregatecrushing)fineaggregatefinenessmodulusshouldbecontrolledintheMaximumwatercementratioconcreteparameterofconcretewatercementratiothemaximumallowablevalue,abovethewaterleveldownstream(outsideofthedam),downstreamwaterlevelchange(outsideofthedam)minimumlevelofupstreamanddownstream(outsideofthedam)basissubjecttowatererosionparts()largevolumebuildingswithinconcreteofminimumamountofcementitiousmaterialtestresultssubmittedtotheengineerAccordingtothecharacteristicsofthebuildings,steelcontent,methodoftransport,pouringconcrete,andclimaticconditions,asfaraspossiblesmallslump()thisstandardconcretecollapsedegreesaccordingtoXiatableselectedcollapsedegreesparametertablebuildingsofnaturestandardroundcollapsedegrees(cm)hydraulicpigmentconcreteorlessreinforcedconcrete~distributionreinforcedratenotoverofreinforcedconcrete~distribution、使学生熟练掌握万以内数的读、写法充分利用有现实意义的数据让学生增长见识。、使学生熟练掌握万以内数的加法和减法的口算、笔算、混合运算做到计算准确。、使学生养成估算、验算的习惯提高计算的能力。三、教学准备:电脑课件四、教学过程:(一)引入课题本节快我先来学习复习本册中所涉及的数与代数的知识。除法数与代数混合运算生活中的大数加与减(一)、(二)(二)、复习、复习万以内数的读写法()提问:读数、写数时要注意什么,()让学生独立完成总复习的第题()让学生做总复习的第题。、复习万以内数的加与减法()指导学生完成总复习第题()指导学生完成总复习第题()指导学生完成总复习第题()指导学生完成总复习第题(三)全课总结通过今天的复习你有什么收获,还有什么问题要提出,(四)作业选用随堂练习空间与图形一、复习内容:P~总复习中的、、、题二、教学目标:thanmonths,highearlystrengthcementuptomonth,andbaggedthestackingheightofnomorethanbagsofcement()water)canbeusedwheresuitablefordrinkingwater,untreatedindustrialwastewatercannotbeused)waterusedinmixingthesubstancescontainedcannotaffecttheworkabilityandstrengthandgrowthandcausecorrosionofsteelandconcrete)waterPHvalue,insolubleandsolublesulfides,chlorides,phosphates,provisionsconsistentwiththefollowingtableofcontentsContentlimitstableentryofprestressedconcreteconcreteconcreteinsolublematterinPHvalue>>>mgL<<<mgL<<<chloridesolublematter(measuredinCL)mgL<<<sulfate(SOdollars)mgL<<<sulfide(Sdollars)mgL<()Aggregate)aggregatesofdifferentmaterialdiameterpiledup,respectively,donotmixwitheachotherandmixedwiththesoilwhenloadingandunloading,sizecoarseaggregatenetfallofgreaterthanmmlessthanM,andavoidseriousaggregatecrushing)fineaggregatefinenessmodulusshouldbecontrolledintheMaximumwatercementratioconcreteparameterofconcretewatercementratiothemaximumallowablevalue,abovethewaterleveldownstream(outsideofthedam),downstreamwaterlevelchange(outsideofthedam)minimumlevelofupstreamanddownstream(outsideofthedam)basissubjecttowatererosionparts()largevolumebuildingswithinconcreteofminimumamountofcementitiousmaterialtestresultssubmittedtotheengineerAccordingtothecharacteristicsofthebuildings,steelcontent,methodoftransport,pouringconcrete,andclimaticconditions,asfaraspossiblesmallslump()thisstandardconcretecollapsedegreesaccordingtoXiatableselectedcollapsedegreesparametertablebuildingsofnaturestandardroundcollapsedegrees(cm)hydraulicpigmentconcreteorlessreinforcedconcrete~distributionreinforcedratenotoverofreinforcedconcrete~distribution、使学生进一步体验认识八个方向给定一个方向(东、西、南、北)能熟练地辨认其余个方向能用这些词语描述物体所在的位置能熟练地根据路线图说出出发地到目的地行走的方向和途径的方向。、使学生体验“千米”“分米”“毫米”了解长度单位之间的关系能估计一些物体的长度。、进一步认识角能熟练辨认直角、锐角、钝角进一步认识长方形、正方形和平行四边形。三、教学准备:电脑课件、剪刀、正方形纸片张四、教学过程:方向与路线(一)空间与图形测量认识图形(二)复习、复习“方向与路线”指导学生做总复习的第题()是辨认方向的练习题让学生在独立思考的基础上先小组说说再全班交流。()是简单路线图的理想先让学生独立设计几条路线图求出长度在小组内交流再全班交流。、复习“测量”()指名说一说分米毫米各有多长,()量一量让学生用学生尺量一量自己中指和大拇指的长度并记下来与同学交流()填一填()画一画()在()里填上合适的单位、复习“认识图形”()指导学生做总复习第题学生独立完成然后全班交流()指导学生做总复习第题thanmonths,highearlystrengthcementuptomonth,andbaggedthestackingheightofnomorethanbagsofcement()water)canbeusedwheresuitablefordrinkingwater,untreatedindustrialwastewatercannotbeused)waterusedinmixingthesubstancescontainedcannotaffecttheworkabilityandstrengthandgrowthandcausecorrosionofsteelandconcrete)waterPHvalue,insolubleandsolublesulfides,chlorides,phosphates,provisionsconsistentwiththefollowingtableofcontentsContentlimitstableentryofprestressedconcreteconcreteconcreteinsolublematterinPHvalue>>>mgL<<<mgL<<<chloridesolublematter(measuredinCL)mgL<<<sulfate(SOdollars)mgL<<<sulfide(Sdollars)mgL<()Aggregate)aggregatesofdifferentmaterialdiameterpiledup,respectively,donotmixwitheachotherandmixedwiththesoilwhenloadingandunloading,sizecoarseaggregatenetfallofgreaterthanmmlessthanM,andavoidseriousaggregatecrushing)fineaggregatefinenessmodulusshouldbecontrolledintheMaximumwatercementratioconcreteparameterofconcretewatercementratiothemaximumallowablevalue,abovethewaterleveldownstream(outsideofthedam),downstreamwaterlevelchange(outsideofthedam)minimumlevelofupstreamanddownstream(outsideofthedam)basissubjecttowatererosionparts()largevolumebuildingswithinconcreteofminimumamountofcementitiousmaterialtestresultssubmittedtotheengineerAccordingtothecharacteristicsofthebuildings,steelcontent,methodoftransport,pouringconcrete,andclimaticconditions,asfaraspossiblesmallslump()thisstandardconcretecollapsedegreesaccordingtoXiatableselectedcollapsedegreesparametertablebuildingsofnaturestandardroundcollapsedegrees(cm)hydraulicpigmentconcreteorlessreinforcedconcrete~distributionreinforcedratenotoverofreinforcedconcrete~distribution学生独立填空全班交流()辨认长方形、正方形、平行四边形(三)操作练习指导学生完成总复习第题。让学生用剪刀和正方形按题意要求独立操作。(四)全课总结说说这节课你有什么收获。(五)作业:选用随堂练习。第三课时:解决问题一、复习内容:P~总复习中的、、、、、题二、教学目标、引导学生学会应用所学的知识解决实际问题培养学生解决实际问题的能力。、使学生学会从具体的情境中发现并提出问题。、引导学生在探讨不同算法的过程事初步了解同一问题可以有不同的解决办法并与同伴合作解决问题。二、教学过程:(一)引入课题:这节课我们学习解决问题。(二)复习、学生做总复习第题。先让学生从题中寻找有关信息理解题意。指名让学生说一说题目的意思。组织全班交流指名多名学会上口述租车方案鼓励学生发表不同是见解和做法。、指导学生做总复习的第题。让学生理解题意后独立解答()()小题再在小组内交流并提出其他问题。thanmonths,highearlystrengthcementuptomonth,andbaggedthestackingheightofnomorethanbagsofcement()water)canbeusedwheresuitablefordrinkingwater,untreatedindustrialwastewatercannotbeused)waterusedinmixingthesubstancescontainedcannotaffecttheworkabilityandstrengthandgrowthandcausecorrosionofsteelandconcrete)waterPHvalue,insolubleandsolublesulfides,chlorides,phosphates,provisionsconsistentwiththefollowingtableofcontentsContentlimitstableentryofprestressedconcreteconcreteconcreteinsolublematterinPHvalue>>>mgL<<<mgL<<<chloridesolublematter(measuredinCL)mgL<<<sulfate(SOdollars)mgL<<<sulfide(Sdollars)mgL<()Aggregate)aggregatesofdifferentmaterialdiameterpiledup,respectively,donotmixwitheachotherandmixedwiththesoilwhenloadingandunloading,sizecoarseaggregatenetfallofgreaterthanmmlessthanM,andavoidseriousaggregatecrushing)fineaggregatefinenessmodulusshouldbecontrolledintheMaximumwatercementratioconcreteparameterofconcretewatercementratiothemaximumallowablevalue,abovethewaterleveldownstream(outsideofthedam),downstreamwaterlevelchange(outsideofthedam)minimumlevelofupstreamanddownstream(outsideofthedam)basissubjecttowatererosionparts()largevolumebuildingswithinconcreteofminimumamountofcementitiousmaterialtestresultssubmittedtotheengineerAccordingtothecharacteristicsofthebuildings,steelcontent,methodoftransport,pouringconcrete,andclimaticconditions,asfaraspossiblesmallslump()thisstandardconcretecollapsedegreesaccordingtoXiatableselectedcollapsedegreesparametertablebuildingsofnaturestandardroundcollapsedegrees(cm)hydraulicpigmentconcreteorlessreinforcedconcrete~distributionreinforcedratenotoverofreinforcedconcrete~distribution、指导学生做总复习第题。教师先帮学生弄懂题意让学生独立填写再组织学生交流。集体交流时应鼓励学生发表不同的意见注意培养学生的估算能力。、指导学生做总复习第题先指导学生通过观察插图发现每串需要颗珠子后然后让学生独立完成。集体交流时教师引导学生复习有余数除法的知识。、指导学生做总复习的第题。先让学生说一说从图里你能得到什么信息。然后让学生独立解答后进行全班交流。、指导学生做总复习的第题。练习时教师注意先引导学生观察本题的插图发现本题中隐含的信息如老师买了盒月饼盒块。接着让学生独立解答后进行全班集交流。(三)全课总结我们要善于从数学的角度提出问题理解问题。并能通过观察思考、猜测交流推理等富有思维成分的活动综合所学的知识解决问题。(四)作业选用随堂练习。、有人要乘车去飞机场面包车限坐人小汽车限坐人可以怎样派车,你认为怎样派车合理。、一壶茶可以倒杯个客人至少需要几壶茶,、小华说:我买了本笔记本共花了元小东说:我买的笔记本每本元谁买的笔记本便宜每本便宜多少钱,第四课时统计一、复习内容:P总复习的第题二、素质复习目标:、让学生简单经历数据的收集、分析、整理的过程。thanmonths,highearlystrengthcementuptomonth,andbaggedthestackingheightofnomorethanbagsofcement()water)canbeusedwheresuitablefordrinkingwater,untreatedindustrialwastewatercannotbeused)waterusedinmixingthesubstancescontainedcannotaffecttheworkabilityandstrengthandgrowthandcausecorrosionofsteelandconcrete)waterPHvalue,insolubleandsolublesulfides,chlorides,phosphates,provisionsconsistentwiththefollowingtableofcontentsContentlimitstableentryofprestressedconcreteconcreteconcreteinsolublematterinPHvalue>>>mgL<<<mgL<<<chloridesolublematter(measuredinCL)mgL<<<sulfate(SOdollars)mgL<<<sulfide(Sdollars)mgL<()Aggregate)aggregatesofdifferentmaterialdiameterpiledup,respectively,donotmixwitheachotherandmixedwiththesoilwhenloadingandunloading,sizecoarseaggregatenetfallofgreaterthanmmlessthanM,andavoidseriousaggregatecrushing)fineaggregatefinenessmodulusshouldbecontrolledintheMaximumwatercementratioconcreteparameterofconcretewatercementratiothemaximumallowablevalue,abovethewaterleveldownstream(outsideofthedam),downstreamwaterlevelchange(outsideofthedam)minimumlevelofupstreamanddownstream(outsideofthedam)basissubjecttowatererosionparts()largevolumebuildingswithinconcreteofminimumamountofcementitiousmaterialtestresultssubmittedtotheengineerAccordingtothecharacteristicsofthebuildings,steelcontent,methodoftransport,pouringconcrete,andclimaticconditions,asfaraspossiblesmallslump()thisstandardconcretecollapsedegreesaccordingtoXiatableselectedcollapsedegreesparametertablebuildingsofnaturestandardroundcollapsedegrees(cm)hydraulicpigmentconcreteorlessreinforcedconcrete~distributionreinforcedratenotoverofreinforcedconcrete~distribution、进一步引导学生学会读统计表会在方格纸上绘制条形统计图(个格表示个单位)(引导学生经历统计的全过程体验统计的必要性。、引导学生进一步学会根据统计数据回答一些简单的实际问题并能作出一些简单的预测。三、教具准备:电脑课件若干张方格纸四、教学过程(一)引入课题:在统计这个单元里我们学到了“哪些知识,(二)复习:、出示课本第页第题表图。、指导学生观察统计表并思考从表中你得到哪些信息,指名口答引导学生收集以下信息:本表是“二()班学生最喜欢的体育运动项目统计表”、根据统计表绘制统计图让学生独立按要求在方格里涂色绘制条形统计图、小组交流班上要组织小小运动会说一说你打算怎样组织,、全班交流(三)课堂练习、出示课堂练习题、展示、交流(四)问题银行让学生打开课本P页把自己在生活中发现的问题写在本页空白处。引导学生看看“问题银行”中的哪些问题通过总复习得到解决并进行全班交流。(五)全课总结谈谈本学期你取得最大的收获是什么,(六)作业thanmonths,highearlystrengthcementuptomonth,andbaggedthestackingheightofnomorethanbagsofcement()water)canbeusedwheresuitablefordrinkingwater,untreatedindustrialwastewatercannotbeused)waterusedinmixingthesubstancescontainedcannotaffecttheworkabilityandstrengthandgrowthandcausecorrosionofsteelandconcrete)waterPHvalue,insolubleandsolublesulfides,chlorides,phosphates,provisionsconsistentwiththefollowingtableofcontentsContentlimitstableentryofprestressedconcreteconcreteconcreteinsolublematterinPHvalue>>>mgL<<<mgL<<<chloridesolublematter(measuredinCL)mgL<<<sulfate(SOdollars)mgL<<<sulfide(Sdollars)mgL<()Aggregate)aggregatesofdifferentmaterialdiameterpiledup,respectively,donotmixwitheachotherandmixedwiththesoilwhenloadingandunloading,sizecoarseaggregatenetfallofgreaterthanmmlessthanM,andavoidseriousaggregatecrushing)fineaggregatefinenessmodulusshouldbecontrolledintheMaximumwatercementratioconcreteparameterofconcretewatercementratiothemaximumallowablevalue,abovethewaterleveldownstream(outsideofthedam),downstreamwaterlevelchange(outsideofthedam)minimumlevelofupstreamanddownstream(outsideofthedam)basissubjecttowatererosionparts()largevolumebuildingswithinconcreteofminimumamountofcementitiousmaterialtestresultssubmittedtotheengineerAccordingtothecharacteristicsofthebuildings,steelcontent,methodoftransport,pouringconcrete,andclimaticconditions,asfaraspossiblesmallslump()thisstandardconcretecollapsedegreesaccordingtoXiatableselectedcollapsedegreesparametertablebuildingsofnaturestandardroundcollapsedegrees(cm)hydraulicpigmentconcreteorlessreinforcedconcrete~distributionreinforcedratenotoverofreinforcedconcrete~distributio
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