万以内数的认识导学案

为搞好山东省交通科学研究所研发基地项目的结算审计工作,我跟踪审计部特针对本项目作如下要求,请各施工单位、供货单位遵照执行：andperformancetestcopiesoftherecord.Ifnecessary,reviewshouldbecarriedout;4)forspringhangers(includedsimplespring,hangersandconstantsupporthangers)itshouldalsoberecognizedassettingandlockingofloads.5)checkthesurfacequality,foldedlayeringandwithoutcracks,rustandotherdefects.5)aftercompletionofthetestandcontroldrawingnumberonebyone,byseriesbaled.Coloralloysteelparts,thepartsmarkinginstallationlocationandrotationaboutthedirectionyouwant.7.3.14.hangersinstallation7.3.14.1hangerlayouta.acleardesignofhangershouldbeinstalledstrictlyinaccordancewiththedrawingsanddesignsshallnotbeinstalledwrong,missing,etc.B.ownarrangementofpipingsupportandhangersetandselectionshouldbebasedoncomprehensiveanalysisofgenerallayoutofpipingsystems;coldinstallationofsteampipewithparticularattentionreservedforcompensationofthermalexpansiondisplacementandorientation.C.supportsystemsshouldberationaltowithstandpipeloads,staticloadandincidentalload;reasonablepipingdisplacement;guaranteedundervariousconditions,stressarewithintheallowedrange.Strength,stiffness,andmeetrequirementstopreventvibrationandsoothingwater,withoutaffectingtheadjacentequipmentmaintenanceandotherpipinginstallationandexpansion.D.equipmentconnectedtotheinterfacetomeetpipelinethrust(torque)limitrequirements;increasethestabilityofpipingsystemstopreventpipeline...Tubewallthickness(mm)2-34-67-10weldformnoslopemouthweldstrengtheningheighth(mm)1-1.51.5-2weldwidthb(mm)5-67-6hasslopemouthweldstrengtheningheighth(mm)1.5-22weldwidthb(mm)coverhadeachedgeslopemouthabout2mmargonarcweldingweldstrengtheningsurfaceheightandwidthtubewallthickness(mm)2--33--45--6weldformweldstrengtheningheighth(mm)1-1.51.5-22-2.5widthb(mm)《万以内数的认识》导学案设计课题万以内数的认识课型学案导学年级二年级设计人付开语学习内容人教版小学数学教材二年下册P73、74页学习目标1、能够正确地数出10000以内的物体个数，建立10000以内数的概念。2、理解10个一千是一万，认识计数单位“万”。3、会读写10000以内的数（中间、末尾没有0的）能说出10000以内数的组成。，4、掌握数位顺序表，理解数位的作用与意义重、难点重点难点：会读写10000以内的数（中间、末尾没有0的），能说出10000以内数的组成。学习过程学案导案自主预习1、观察下列两组数，先回答是怎么数的，再接着数出后面的4个数来。38、48、58、68、（）、（）、（）、（）130、230、330、430、（）、（）、（）、（）2、读出下面的数。865507430800谁能说说读数时要从哪位读起？怎样读？并说说这些数是由什么组成的3、想一想，999是几位数？再添1是多少？它是几位数？课前预习设计意图通过准备练习复习旧知，为学生迁移性的学习新知做好准备。知识连接（3分钟）1、检查预习情况。2、思考：999是个几位数？再添1是多少？它是几位数？3、请学生介绍对南京长江大桥的认识。小组交流公路桥，铁路桥的长度的读法。4、出示学习目标。自学检查设计通过复习旧的知识向新的知识自然过渡为搞好山东省交通科学研究所研发基地项目的结算审计工作,我跟踪审计部特针对本项目作如下要求,请各施工单位、供货单位遵照执行：andperformancetestcopiesoftherecord.Ifnecessary,reviewshouldbecarriedout;4)forspringhangers(includedsimplespring,hangersandconstantsupporthangers)itshouldalsoberecognizedassettingandlockingofloads.5)checkthesurfacequality,foldedlayeringandwithoutcracks,rustandotherdefects.5)aftercompletionofthetestandcontroldrawingnumberonebyone,byseriesbaled.Coloralloysteelparts,thepartsmarkinginstallationlocationandrotationaboutthedirectionyouwant.7.3.14.hangersinstallation7.3.14.1hangerlayouta.acleardesignofhangershouldbeinstalledstrictlyinaccordancewiththedrawingsanddesignsshallnotbeinstalledwrong,missing,etc.B.ownarrangementofpipingsupportandhangersetandselectionshouldbebasedoncomprehensiveanalysisofgenerallayoutofpipingsystems;coldinstallationofsteampipewithparticularattentionreservedforcompensationofthermalexpansiondisplacementandorientation.C.supportsystemsshouldberationaltowithstandpipeloads,staticloadandincidentalload;reasonablepipingdisplacement;guaranteedundervariousconditions,stressarewithintheallowedrange.Strength,stiffness,andmeetrequirementstopreventvibrationandsoothingwater,withoutaffectingtheadjacentequipmentmaintenanceandotherpipinginstallationandexpansion.D.equipmentconnectedtotheinterfacetomeetpipelinethrust(torque)limitrequirements;increasethestabilityofpipingsystemstopreventpipeline...Tubewallthickness(mm)2-34-67-10weldformnoslopemouthweldstrengtheningheighth(mm)1-1.51.5-2weldwidthb(mm)5-67-6hasslopemouthweldstrengtheningheighth(mm)1.5-22weldwidthb(mm)coverhadeachedgeslopemouthabout2mmargonarcweldingweldstrengtheningsurfaceheightandwidthtubewallthickness(mm)2--33--45--6weldformweldstrengtheningheighth(mm)1-1.51.5-22-2.5widthb(mm)学习过程意图自主学习（10分钟）1、观察例4中的立方体。①数一数：一个大立方体中有多少个小的立方体。②一个大立方体有1000个小立方体，10个大立方体，共有多少个小正方体？你是怎么样数的？小组讨论并交流数的方法。一千一千地数，我们发现了什么？③在计数器上指出千位和万位。千位在右起第几位？万位是右起第几位？小组合作，动手数一数、摆一摆，讨论后代表汇报2、观察例5。（1）试着读出这个数。（2）如何写出这个数，试着写写。（3）这个数是由（）个千，（）个百，（）个十和（）个一组成的。（4）有关这个数你还知道些什么？让学生尝试读一读、写一写。3、制作数位顺序表。（1）到现在为止，我们学过的计数单位有哪些？计数单位呢？（2）从右往左它们的顺序依次是？（3）试着完成数位顺序表。（4）根据学生回答，师生共同数一数。并板书：10个一千是一万。（5）学生用计数器拨出2356。让学生利用已有的经验进行动手操作4、学生制作完成后组织交流展示。让学生交流并展示自己的作品设计意图通过自主探究，掌握了数位的顺序，同时培养了学生的动手操作能力，通过活动学习，掌握了万以内数的读写和组成，同时也培养学生的推理、分析能力和知识的迁移能力。为搞好山东省交通科学研究所研发基地项目的结算审计工作,我跟踪审计部特针对本项目作如下要求,请各施工单位、供货单位遵照执行：andperformancetestcopiesoftherecord.Ifnecessary,reviewshouldbecarriedout;4)forspringhangers(includedsimplespring,hangersandconstantsupporthangers)itshouldalsoberecognizedassettingandlockingofloads.5)checkthesurfacequality,foldedlayeringandwithoutcracks,rustandotherdefects.5)aftercompletionofthetestandcontroldrawingnumberonebyone,byseriesbaled.Coloralloysteelparts,thepartsmarkinginstallationlocationandrotationaboutthedirect