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1、第课时（月日）№：教学内容认识角复习补充习题第48-49页教学目标1.对角的相关知识进行系统的整理与复习。2.能借助三角尺辨认三种角。3.让学生了解“角的知识”与生活密切相关，生活中到处可以找到角。培养学生的社会意识。重点难点准确的数角教学准备教学过程思考与调整一．谈话引入关于角的知识，同学们都掌握得非常好。这节课，我们共同来完成练习。二．综合练习1．完成补充习题第48页第1、2题。学生独立完成，做完后集体订正。2．完成补充习题第48页第3题。学生独立完成，集体订正时说说判断的原因。3．完成补充习题第48页第4题。观察
2、这三个钟面上时针和分针所组成的角，并说说你是怎么判断锐角、直角、钝角。4．完成补充习题第48页第5题。学生独立完成，做完后同桌互查检查是否一样。说一说怎么比较。5．完成补充习题第49页第1-2题。学生独立完成，做完后集体订正，说说你是怎么样数这些角的。6．完成补充习题第49页第3题。学生拿出三角尺进行比较、填写。7．完成补充习题第49页第4题。数一数，说一说，想一想有什么发现？三、课堂小结enforcedthermalinsulationstartscheckingsystem,issuedbythethermalin
3、sulationconstructionbeforeyoustarttonotice,transferinspectionofupperandloweroperationandtransferofrecords.Foroutdooroperation,pipelineequipmenttoeffectivelycarryouttheinsulationwaterproofmeasuresfailtoinstallprotectivepanelsinpartwiththreetarpaulincover,topreven
4、tinsulationfrommoisture.InsulationseamMichaelJackson5mm,joints,joints>100mm,insulationthicknesstolerance(+10MM~–5mm),appropriatematerialelasticbanding,spacingaccordingtothedesignrequirements,rigidinsulationsoftmaterialsforconstructionjointstight;Andlarge-diamete
5、rverticalpipeforhightemperaturepipelineinstrictaccordancewithdesigndrawingscalledfortheestablishmentofexpansionjointsandholdingbracket;Designrequirementsintoaremovabletypeofinsulation,instrictaccordancewithspecificationsdisconnectfromtheotherinsulation;Surfacein
6、sulationboardsinthetechnologyofplasteringconstructionofwovenclothtopreventpollutionandprotectivepanelsflushwiththesurfaceinterface,tightandclean.Sitemeasurementofinsulationboardsforelbowshapecutting,ensurethateachpieceoflappedtraffic,arctransitionofnatural,beaut
7、iful,screwsup.Stampedeoutsideconstructionpersonnelisstrictlyprohibitedandshelveobjectsdirectlyontheoutershield.Inordertopreventthepollution-proneheater,channelareaofsecondarypollutionoflarge-diameterpipesandotherequipment,weavingcloth,anderectionoftheseparationp
8、latformforpreservation.Thermalinsulationconstruction,on-hooktackweldedtotheconsolidatedline,toensureevenlyspaced,andthehooknaileddown...Seenextpageflowchartmanagement
