四年级数学下册全册教案_第3单元 运算定律与简便计算

BLINDBOARDOPERATIONALSECURITYREQUIREMENTS1BLOCKINGBLINDBOARDOPERATIONSREQUIREDTOHANDLEBLOCKINGBLINDBOARDOPERATINGLICENSE,NOBLOCKINGBLINDBOARDOPERATINGLICENSEARENOTALLOWEDTOSMOKEBLOCKINGBLINDBOARDOPERATIONS2ITISSTRICTLYPROHIBITEDTOALTER,LENTTHEBLOCKINGBLINDBOARDOPERATINGLICENSECONTENTCONVERSIONANDEXPANSIONOFOPERATIONSORTRANSFERJOBSSITE,AGAINFORBLOCKINGBLINDBOARDOPERATINGLICENSE3INCOMPLETEJOBAPPROVALPROCEDURES,SAFETYMEASURESARENOTIMPLEMENTED,WORKENVIRONMENTDOESNOTMEETSECURITYREQUIREMENTS,WORKERSHAVETHERIGHTTOREFUSETOWORK4TOXICGASPIPING,EQUIPMENTBLOCKINGBLINDBOARD,NONIRRITANTGASPRESSURESHOULDBELESSTHAN200MMHGIRRITANTGASPRESSURESHOULDBELESSTHAN50MMHGGASTEMPERATURESHOULDBELESSTHAN60DEGREES5TECHNICALDEPARTMENTRESPONSIBLEFORDRAWINGBLINDLOCATIONMAP,NUMBERSTHEBLIND,CONSTRUCTIONPERSONNELWORK,BLINDLOCATIONMAPBYTECHNOLOGYARCHIVEFORFUTUREREFERENCE6THEBLINDPLUGOPERATINGPERSONNELMUSTWEARAPPROPRIATEPERSONALPROTECTIVEEQUIPMENT,MUSTDESIGNATEAPERSONRESPONSIBLEFORBLOCKINGBLINDBOARDWORK,ANDTODESIGNATEAPERSONRESPONSIBLEFORMONITORINGGUARDIANSAREADVISEDBYEXPERIENCEDOFFICERS,GUARDIANJOBSPEOPLEMUSTWEARAPPROPRIATEPROTECTIVEEQUIPMENTASREQUIRED,ANDGUARDIANSMUSTCHECK,IMPLEMENTINGRELEVANTSAFETYMEASURESONTHEJOBGUARDIANSMUSTADHERETOTHESCENE,ANDEMERGENCYTREATMENTJOBGUARDIANSHALLNOTLEAVETHEJOBSITEBEFORETHEEND7THEJOBCOMPLICATED,DANGEROUSPLACES,APARTFROMTHEGUARDIAN,ALSOCOMPANYLEADERSHIP,SAFETYANDENVIRONMENTDEPARTMENT,ISRESPONSIBLEFORPERSONNELINVOLVINGTHEENTIREPRODUCTIONSYSTEM,HEADOFTHETECHNICALDEPARTMENTMUSTBEPRESENT8INPLACESWHEREINFLAMMABLEANDEXPLOSIVEWORK,PLACEWITHIN30METRESWITHOUTHOTWORKOPERATIONSTASKLIGHTINGSHOULDUSEEXPLOSIONPROOFLAMPSANDEXPLOSIONPROOFTOOLSSHOULDBEUSED,PROHIBITIONOFBEATINGWITHANIRONPIPE,FLANGE,ETC9HIGHBLOCKINGBLINDBOARDOPERATIONSHALLFOLLOWTHEPROVISIONSOFLICENSEFORWORKINGATHEIGHT10CONSTRUCTIONUNITTOBLINDALOTACCORDINGTOTHEREQUIREMENTSOFTHEPERMITTOWORK,THEIMPLEMENTATIONOFSAFETYMEASURES,WORKCANBECARRIEDOUT11ISSTRICTLYPROHIBITEDONTHESAMEPIPESIMULTANEOUSLYINTWOPLACESANDTWOORMOREBLOCKINGBLINDBOARDOPERATIONSWHENPLUGGINGMULTIPLEBLIND,BLINDTOBLINDLOCATIONMAPANDPLATESNUMBERBYCONSTRUCTIONGENERALMANAGER,UNITYOFCOMMANDASSIGNMENTS12SIGNSINEACHBLOCKINGBLINDBOARDSHOWSTHATBLINDLOCATIONCTHEBLOCKINGBLINDBOARDPERMITSTHEMANAGEMENTOF1BLINDLOCATIONMAP,IMPLEMENTSECURITYMEASURES,AFTERTHEAPPROVALOFTHETECHNICALDEPARTMENT,ASSIGNMENTUNITSSTAFFTOCONFIRMJOBCOMPLEX,DANGEROUSPLACESREQUIREDSECURITYAUDITSOFTHEDEPARTMENTOFENVIRONMENTALPROTECTION,THECOMPANYINCHARGEOFSAFETYVICEPRESIDENTFORAPPROVAL4APPROVEAGOODBLOCKINGBLINDBOARDOPERATINGLICENSEINTRIPLICATE,MAINCONTRACTORS,OPERATINGUNITS,EACHHOLDACOPYOFTHEBIOSECTION5AFTERTHEENDOFTHEJOB,JOBS,TECHNICALCHECK,ACTIVITYHANDEDTHEBLINDLOCATIONTECHNOLOGY6WORKPERMITSMANAGEMENTSHOULDESTABLISHTHETICKETFILEINVENTORY,THETICKETISKEPTFOR3YEARSTHELIFTINGOPERATIONMANAGEMENTSYSTEM,PURPOSEINORDERTOCONTROLTHEPRODUCTIONWITHINTHEREGION,LIFTING,LIFTINGACTIVITIESTOPREVENTTHEOCCURRENCEOFACCIDENTS,THESYSTEMISFORMULATEDSECOND,THESCOPEOFAPPLICATIONOFTHISSYSTEMAPPLIESTOALLCOMPANIESWITHINTHELIFTINGOPERATIONTHIRD,LIFTINGALICENSEOFGRADEDCREDITTHREELEVELSOFMANAGEMENTIGENERALEQUIPMENT,WEIGHINGLESSTHAN1TONOFWEIGHTLIFTING,THELIFTINGOFTHERULES,TECHNOLOGYREVIEW,WORKSHOPDIRECTORFORAPPROVALBTHERULESOFWEIGHTEQUALTOORGREATERTHAN1TONLESSTHAN10TONSOFWEIGHTLIFTING,HOISTING,APPROVEDBYTHEWORKSHOP,EQUIPMENTMANAGEMENTDEPARTMENTFORAPPROVALCOFOVER10TONSANDHEAVYLIFTINGOPERATIONSPROJECTSORCONSTRUCTIONUNDERTHESPECIALCONDITIONS,SHALLPREPARELIFTINGPLAN,PERMITTOWORKSUBMITTEDTOCOMPANYEXECUTIVESANDSAFETYEQUIPMENT,THEJOINTSECURITYSECTORREVIEWCOMPETENTAFTERASSISTANTGENERALMANAGERAPPROVALFOUR,LIFTINGSAFETYREQUIREMENTS1LIFTINGWEIGHTSGREATERTHANOREQUALTO10TONNESOFTHEOBJECTANDTHESUBJECTOFCIVILENGINEERINGSTRUCTURES,HOISTINGCONSTRUCTIONPLANSHALLBEPREPAREDLOADISLESSTHAN10TONNES,BUTSMALLCOMPLEXSHAPES,STIFFNESS,LENGTHDIAMETERRATIO,PRECISIONPRECIOUS,UNDERTHESPECIALCONDITIONSOFCONSTRUCTION,SHOULDALSOPREPARECONSTRUCTIONPROGRAMMESHOISTINGCONSTRUCTIONPROGRAMMESEXAMINEDBYTHEPROJECTAUTHORITIES,SUBMITTEDTOTHECOMPETENTVPAPPROVALTOBEIMPLEMENTED2LIFTINGOPERATIONSMUSTSETUPTHEALERTLINEANDSETUPSPECIALCARE,GUARDIANSHIPPERSONNELMUSTWEARARMBANDS,LIFTINGREGIONALSTAFFOUTOFBOUNDS3LIFTINGOPERATIONSMUSTBEPROVIDEDFORLIFTINGLOADS,SLINGS,RIGGINGANDECONOMICCALCULATIONOPTIONS,DONOTOVERLOADWHENLIFTINGHEAVYOBJECTSCLOSETOORREACHTHERATEDLIFTINGCAPACITY,CHECKBRAKES,LOWHEIGHT,SHORTSTROKEAFTERTHELOADTEST,THENSMOOTHLYLIFTEDLARGEANDMEDIUMSIZEDEQUIPMENTBEFORELIFTING,LOADTESTSHOULDBECARRIEDOUTTRYHANGINGHEIGHTFORABOUT02MANDTHENCONDUCTARELIABILITYCHECKINCLUDINGTHESELECTIONANDCALCULATIONOFSAFETYFACTOROVERLOADLIFTINGISSTRICTLYPROHIBITED4BEFORELIFTINGMUSTPADTHEWOODANDTHEWOODUSEDMUSTBEOFADEQUATESIZEBESURETOOVER1MWHENLIFTINGREQUIRESFIREESCAPE,YOUMUSTCONTACTTHECIRCUITBREAKERINACCORDANCEWITHTHEPROVISIONS5LIFTINGOPERATIONSMUSTBERUNONALLKINDSOFHOISTINGMACHINERYPARTS,SAFETYDEVICESASWELLASSLINGS,RIGGINGADETAILEDSECURITYCHECKS,SECURITYDEVICESFORLIFTINGEQUIPMENTISSENSITIVEANDRELIABLE,NOILLNESSMUSTTRYBEFORELIFTINGCRANE,CONFIRMEDBEFORETHEYCANWORK6LIFTINGOPERATIONS,REMOVEDPLATFORMGUARDRAILMUSTBERESTOREDTHEBOLTACTIVITYFENCEREMOVALISSTRICTLYPROHIBITED7LIFTINGOPERATIONS,SHOULDHAVEADEQUATELIGHTINGATNIGHT,OUTDOOR16,LIFTINGTHEAPPROVALPROCEDUREISNOTCOMPLETE,SECURITYMEASURESARENOT第三单元运算定律与简便计算加法交换律、加法结合律教学内容P28/例1（加法交换律）P29/例2（加法结合律）教学目标引导学生探究和理解加法交换律、结合律。培养学生根据具体情况，选择算法的意识与能力，发展思维的灵活性。使学生感受数学与现实生活的联系，能用所学知识解决简单的实际问题。教学过程一、主题图引入观察主题图，根据条件提出问题（1）李叔叔今天一共骑了多少千米（2）李叔叔三天一共骑了多少千米引导学生观察主题图教师根据学生提出的问题板书。二、新授练习本上用自己的方法列出综合算式，解答黑板上问题。教师巡视，找出课堂上需要的答案，找学生板演。学生观察第一组算式，发现特点。引导学生观察第一组算式，总结出40565640试着再举出几个这样的例子。根据学生的举例，进行板书。通过这几组算式，你们发现了什么学生发现规律两个加数交换位置，和不变。这叫做加法交换律。教师根据学生的小结，板书。你能用自己喜欢的方式表示出加法交换律吗引导学生观察第二组算式，总结出（8810496）88（10496）学生BLINDBOARDOPERATIONALSECURITYREQUIREMENTS1BLOCKINGBLINDBOARDOPERATIONSREQUIREDTOHANDLEBLOCKINGBLINDBOARDOPERATINGLICENSE,NOBLOCKINGBLINDBOARDOPERATINGLICENSEARENOTALLOWEDTOSMOKEBLOCKINGBLINDBOARDOPERATIONS2ITISSTRICTLYPROHIBITEDTOALTER,LENTTHEBLOCKINGBLINDBOARDOPERATINGLICENSECONTENTCONVERSIONANDEXPANSIONOFOPERATIONSORTRANSFERJOBSSITE,AGAINFORBLOCKINGBLINDBOARDOPERATINGLICENSE3INCOMPLETEJOBAPPROVALPROCEDURES,SAFETYMEASURESARENOTIMPLEMENTED,WORKENVIRONMENTDOESNOTMEETSECURITYREQUIREMENTS,WORKERSHAVETHERIGHTTOREFUSETOWORK4TOXICGASPIPING,EQUIPMENTBLOCKINGBLINDBOARD,NONIRRITANTGASPRESSURESHOULDBELESSTHAN200MMHGIRRITANTGASPRESSURESHOULDBELESSTHAN50MMHGGASTEMPERATURESHOULDBELESSTHAN60DEGREES5TECHNICALDEPARTMENTRESPONSIBLEFORDRAWINGBLINDLOCATIONMAP,NUMBERSTHEBLIND,CONSTRUCTIONPERSONNELWORK,BLINDLOCATIONMAPBYTECHNOLOGYARCHIVEFORFUTUREREFERENCE6THEBLINDPLUGOPERATINGPERSONNELMUSTWEARAPPROPRIATEPERSONALPROTECTIVEEQUIPMENT,MUSTDESIGNATEAPERSONRESPONSIBLEFORBLOCKINGBLINDBOARDWORK,ANDTODESIGNATEAPERSONRESPONSIBLEFORMONITORINGGUARDIANSAREADVISEDBYEXPERIENCEDOFFICERS,GUARDIANJOBSPEOPLEMUSTWEARAPPROPRIATEPROTECTIVEEQUIPMENTASREQUIRED,ANDGUARDIANSMUSTCHECK,IMPLEMENTINGRELEVANTSAFETYMEASURESONTHEJOBGUARDIANSMUSTADHERETOTHESCENE,ANDEMERGENCYTREATMENTJOBGUARDIANSHALLNOTLEAVETHEJOBSITEBEFORETHEEND7THEJOBCOMPLICATED,DANGEROUSPLACES,APARTFROMTHEGUARDIAN,ALSOCOMPANYLEADERSHIP,SAFETYANDENVIRONMENTDEPARTMENT,ISRESPONSIBLEFORPERSONNELINVOLVINGTHEENTIREPRODUCTIONSYSTEM,HEADOFTHETECHNICALDEPARTMENTMUSTBEPRESENT8INPLACESWHEREINFLAMMABLEANDEXPLOSIVEWORK,PLACEWITHIN30METRESWITHOUTHOTWORKOPERATIONSTASKLIGHTINGSHOULDUSEEXPLOSIONPROOFLAMPSANDEXPLOSIONPROOFTOOLSSHOULDBEUSED,PROHIBITIONOFBEATINGWITHANIRONPIPE,FLANGE,ETC9HIGHBLOCKINGBLINDBOARDOPERATIONSHALLFOLLOWTHEPROVISIONSOFLICENSEFORWORKINGATHEIGHT10CONSTRUCTIONUNITTOBLINDALOTACCORDINGTOTHEREQUIREMENTSOFTHEPERMITTOWORK,THEIMPLEMENTATIONOFSAFETYMEASURES,WORKCANBECARRIEDOUT11ISSTRICTLYPROHIBITEDONTHESAMEPIPESIMULTANEOUSLYINTWOPLACESANDTWOORMOREBLOCKINGBLINDBOARDOPERATIONSWHENPLUGGINGMULTIPLEBLIND,BLINDTOBLINDLOCATIONMAPANDPLATESNUMBERBYCONSTRUCTIONGENERALMANAGER,UNITYOFCOMMANDASSIGNMENTS12SIGNSINEACHBLOCKINGBLINDBOARDSHOWSTHATBLINDLOCATIONCTHEBLOCKINGBLINDBOARDPERMITSTHEMANAGEMENTOF1BLINDLOCATIONMAP,IMPLEMENTSECURITYMEASURES,AFTERTHEAPPROVALOFTHETECHNICALDEPARTMENT,ASSIGNMENTUNITSSTAFFTOCONFIRMJOBCOMPLEX,DANGEROUSPLACESREQUIREDSECURITYAUDITSOFTHEDEPARTMENTOFENVIRONMENTALPROTECTION,THECOMPANYINCHARGEOFSAFETYVICEPRESIDENTFORAPPROVAL4APPROVEAGOODBLOCKINGBLINDBOARDOPERATINGLICENSEINTRIPLICATE,MAINCONTRACTORS,OPERATINGUNITS,EACHHOLDACOPYOFTHEBIOSECTION5AFTERTHEENDOFTHEJOB,JOBS,TECHNICALCHECK,ACTIVITYHANDEDTHEBLINDLOCATIONTECHNOLOGY6WORKPERMITSMANAGEMENTSHOULDESTABLISHTHETICKETFILEINVENTORY,THETICKETISKEPTFOR3YEARSTHELIFTINGOPERATIONMANAGEMENTSYSTEM,PURPOSEINORDERTOCONTROLTHEPRODUCTIONWITHINTHEREGION,LIFTING,LIFTINGACTIVITIESTOPREVENTTHEOCCURRENCEOFACCIDENTS,THESYSTEMISFORMULATEDSECOND,THESCOPEOFAPPLICATIONOFTHISSYSTEMAPPLIESTOALLCOMPANIESWITHINTHELIFTINGOPERATIONTHIRD,LIFTINGALICENSEOFGRADEDCREDITTHREELEVELSOFMANAGEMENTIGENERALEQUIPMENT,WEIGHINGLESSTHAN1TONOFWEIGHTLIFTING,THELIFTINGOFTHERULES,TECHNOLOGYREVIEW,WORKSHOPDIRECTORFORAPPROVALBTHERULESOFWEIGHTEQUALTOORGREATERTHAN1TONLESSTHAN10TONSOFWEIGHTLIFTING,HOISTING,APPROVEDBYTHEWORKSHOP,EQUIPMENTMANAGEMENTDEPARTMENTFORAPPROVALCOFOVER10TONSANDHEAVYLIFTINGOPERATIONSPROJECTSORCONSTRUCTIONUNDERTHESPECIALCONDITIONS,SHALLPREPARELIFTINGPLAN,PERMITTOWORKSUBMITTEDTOCOMPANYEXECUTIVESANDSAFETYEQUIPMENT,THEJOINTSECURITYSECTORREVIEWCOMPETENTAFTERASSISTANTGENERALMANAGERAPPROVALFOUR,LIFTINGSAFETYREQUIREMENTS1LIFTINGWEIGHTSGREATERTHANOREQUALTO10TONNESOFTHEOBJECTANDTHESUBJECTOFCIVILENGINEERINGSTRUCTURES,HOISTINGCONSTRUCTIONPLANSHALLBEPREPAREDLOADISLESSTHAN10TONNES,BUTSMALLCOMPLEXSHAPES,STIFFNESS,LENGTHDIAMETERRATIO,PRECISIONPRECIOUS,UNDERTHESPECIALCONDITIONSOFCONSTRUCTION,SHOULDALSOPREPARECONSTRUCTIONPROGRAMMESHOISTINGCONSTRUCTIONPROGRAMMESEXAMINEDBYTHEPROJECTAUTHORITIES,SUBMITTEDTOTHECOMPETENTVPAPPROVALTOBEIMPLEMENTED2LIFTINGOPERATIONSMUSTSETUPTHEALERTLINEANDSETUPSPECIALCARE,GUARDIANSHIPPERSONNELMUSTWEARARMBANDS,LIFTINGREGIONALSTAFFOUTOFBOUNDS3LIFTINGOPERATIONSMUSTBEPROVIDEDFORLIFTINGLOADS,SLINGS,RIGGINGANDECONOMICCALCULATIONOPTIONS,DONOTOVERLOADWHENLIFTINGHEAVYOBJECTSCLOSETOORREACHTHERATEDLIFTINGCAPACITY,CHECKBRAKES,LOWHEIGHT,SHORTSTROKEAFTERTHELOADTEST,THENSMOOTHLYLIFTEDLARGEANDMEDIUMSIZEDEQUIPMENTBEFORELIFTING,LOADTESTSHOULDBECARRIEDOUTTRYHANGINGHEIGHTFORABOUT02MANDTHENCONDUCTARELIABILITYCHECKINCLUDINGTHESELECTIONANDCALCULATIONOFSAFETYFACTOROVERLOADLIFTINGISSTRICTLYPROHIBITED4BEFORELIFTINGMUSTPADTHEWOODANDTHEWOODUSEDMUSTBEOFADEQUATESIZEBESURETOOVER1MWHENLIFTINGREQUIRESFIREESCAPE,YOUMUSTCONTACTTHECIRCUITBREAKERINACCORDANCEWITHTHEPROVISIONS5LIFTINGOPERATIONSMUSTBERUNONALLKINDSOFHOISTINGMACHINERYPARTS,SAFETYDEVICESASWELLASSLINGS,RIGGINGADETAILEDSECURITYCHECKS,SECURITYDEVICESFORLIFTINGEQUIPMENTISSENSITIVEANDRELIABLE,NOILLNESSMUSTTRYBEFORELIFTINGCRANE,CONFIRMEDBEFORETHEYCANWORK6LIFTINGOPERATIONS,REMOVEDPLATFORMGUARDRAILMUSTBERESTOREDTHEBOLTACTIVITYFENCEREMOVALISSTRICTLYPROHIBITED7LIFTINGOPERATIONS,SHOULDHAVEADEQUATELIGHTINGATNIGHT,OUTDOOR16,LIFTINGTHEAPPROVALPROCEDUREISNOTCOMPLETE,SECURITYMEASURESARENOT观察第二组算式，发现特点。学生继续观察几组算式。出示（69172）28、69（17228）、155（145207）、（155145）207通过上面的几组算式，你们发现了什么学生总结观察到的规律。教师板书先把前两个数相加，或者先把后两个数相加，和不变。这叫做叫法结合律。学生用自己喜欢的方式表示加法结合律。学生根据这两个运算定律，举一些生活中的例子。三、巩固练习P28/做一做、P31/4、1四、小结学生小结本节课学习的加法的运算定律。今天这节课你们都有什么收获你能把这些运用于以后的学习中吗五、作业P31/3板书设计加法的运算定律（1）李叔叔今天一共骑了多少千米（2）李叔叔三天一共骑了多少千米405696（千米）564096（千米）881049610496881929620088BLINDBOARDOPERATIONALSECURITYREQUIREMENTS1BLOCKINGBLINDBOARDOPERATIONSREQUIREDTOHANDLEBLOCKINGBLINDBOARDOPERATINGLICENSE,NOBLOCKINGBLINDBOARDOPERATINGLICENSEARENOTALLOWEDTOSMOKEBLOCKINGBLINDBOARDOPERATIONS2ITISSTRICTLYPROHIBITEDTOALTER,LENTTHEBLOCKINGBLINDBOARDOPERATINGLICENSECONTENTCONVERSIONANDEXPANSIONOFOPERATIONSORTRANSFERJOBSSITE,AGAINFORBLOCKINGBLINDBOARDOPERATINGLICENSE3INCOMPLETEJOBAPPROVALPROCEDURES,SAFETYMEASURESARENOTIMPLEMENTED,WORKENVIRONMENTDOESNOTMEETSECURITYREQUIREMENTS,WORKERSHAVETHERIGHTTOREFUSETOWORK4TOXICGASPIPING,EQUIPMENTBLOCKINGBLINDBOARD,NONIRRITANTGASPRESSURESHOULDBELESSTHAN200MMHGIRRITANTGASPRESSURESHOULDBELESSTHAN50MMHGGASTEMPERATURESHOULDBELESSTHAN60DEGREES5TECHNICALDEPARTMENTRESPONSIBLEFORDRAWINGBLINDLOCATIONMAP,NUMBERSTHEBLIND,CONSTRUCTIONPERSONNELWORK,BLINDLOCATIONMAPBYTECHNOLOGYARCHIVEFORFUTUREREFERENCE6THEBLINDPLUGOPERATINGPERSONNELMUSTWEARAPPROPRIATEPERSONALPROTECTIVEEQUIPMENT,MUSTDESIGNATEAPERSONRESPONSIBLEFORBLOCKINGBLINDBOARDWORK,ANDTODESIGNATEAPERSONRESPONSIBLEFORMONITORINGGUARDIANSAREADVISEDBYEXPERIENCEDOFFICERS,GUARDIANJOBSPEOPLEMUSTWEARAPPROPRIATEPROTECTIVEEQUIPMENTASREQUIRED,ANDGUARDIANSMUSTCHECK,IMPLEMENTINGRELEVANTSAFETYMEASURESONTHEJOBGUARDIANSMUSTADHERETOTHESCENE,ANDEMERGENCYTREATMENTJOBGUARDIANSHALLNOTLEAVETHEJOBSITEBEFORETHEEND7THEJOBCOMPLICATED,DANGEROUSPLACES,APARTFROMTHEGUARDIAN,ALSOCOMPANYLEADERSHIP,SAFETYANDENVIRONMENTDEPARTMENT,ISRESPONSIBLEFORPERSONNELINVOLVINGTHEENTIREPRODUCTIONSYSTEM,HEADOFTHETECHNICALDEPARTMENTMUSTBEPRESENT8INPLACESWHEREINFLAMMABLEANDEXPLOSIVEWORK,PLACEWITHIN30METRESWITHOUTHOTWORKOPERATIONSTASKLIGHTINGSHOULDUSEEXPLOSIONPROOFLAMPSANDEXPLOSIONPROOFTOOLSSHOULDBEUSED,PROHIBITIONOFBEATINGWITHANIRONPIPE,FLANGE,ETC9HIGHBLOCKINGBLINDBOARDOPERATIONSHALLFOLLOWTHEPROVISIONSOFLICENSEFORWORKINGATHEIGHT10CONSTRUCTIONUNITTOBLINDALOTACCORDINGTOTHEREQUIREMENTSOFTHEPERMITTOWORK,THEIMPLEMENTATIONOFSAFETYMEASURES,WORKCANBECARRIEDOUT11ISSTRICTLYPROHIBITEDONTHESAMEPIPESIMULTANEOUSLYINTWOPLACESANDTWOORMOREBLOCKINGBLINDBOARDOPERATIONSWHENPLUGGINGMULTIPLEBLIND,BLINDTOBLINDLOCATIONMAPANDPLATESNUMBERBYCONSTRUCTIONGENERALMANAGER,UNITYOFCOMMANDASSIGNMENTS12SIGNSINEACHBLOCKINGBLINDBOARDSHOWSTHATBLINDLOCATIONCTHEBLOCKINGBLINDBOARDPERMITSTHEMANAGEMENTOF1BLINDLOCATIONMAP,IMPLEMENTSECURITYMEASURES,AFTERTHEAPPROVALOFTHETECHNICALDEPARTMENT,ASSIGNMENTUNITSSTAFFTOCONFIRMJOBCOMPLEX,DANGEROUSPLACESREQUIREDSECURITYAUDITSOFTHEDEPARTMENTOFENVIRONMENTALPROTECTION,THECOMPANYINCHARGEOFSAFETYVICEPRESIDENTFORAPPROVAL4APPROVEAGOODBLOCKINGBLINDBOARDOPERATINGLICENSEINTRIPLICATE,MAINCONTRACTORS,OPERATINGUNITS,EACHHOLDACOPYOFTHEBIOSECTION5AFTERTHEENDOFTHEJOB,JOBS,TECHNICALCHECK,ACTIVITYHANDEDTHEBLINDLOCATIONTECHNOLOGY6WORKPERMITSMANAGEMENTSHOULDESTABLISHTHETICKETFILEINVENTORY,THETICKETISKEPTFOR3YEARSTHELIFTINGOPERATIONMANAGEMENTSYSTEM,PURPOSEINORDERTOCONTROLTHEPRODUCTIONWITHINTHEREGION,LIFTING,LIFTINGACTIVITIESTOPREVENTTHEOCCURRENCEOFACCIDENTS,THESYSTEMISFORMULATEDSECOND,THESCOPEOFAPPLICATIONOFTHISSYSTEMAPPLIESTOALLCOMPANIESWITHINTHELIFTINGOPERATIONTHIRD,LIFTINGALICENSEOFGRADEDCREDITTHREELEVELSOFMANAGEMENTIGENERALEQUIPMENT,WEIGHINGLESSTHAN1TONOFWEIGHTLIFTING,THELIFTINGOFTHERULES,TECHNOLOGYREVIEW,WORKSHOPDIRECTORFORAPPROVALBTHERULESOFWEIGHTEQUALTOORGREATERTHAN1TONLESSTHAN10TONSOFWEIGHTLIFTING,HOISTING,APPROVEDBYTHEWORKSHOP,EQUIPMENTMANAGEMENTDEPARTMENTFORAPPROVALCOFOVER10TONSANDHEAVYLIFTINGOPERATIONSPROJECTSORCONSTRUCTIONUNDERTHESPECIALCONDITIONS,SHALLPREPARELIFTINGPLAN,PERMITTOWORKSUBMITTEDTOCOMPANYEXECUTIVESANDSAFETYEQUIPMENT,THEJOINTSECURITYSECTORREVIEWCOMPETENTAFTERASSISTANTGENERALMANAGERAPPROVALFOUR,LIFTINGSAFETYREQUIREMENTS1LIFTINGWEIGHTSGREATERTHANOREQUALTO10TONNESOFTHEOBJECTANDTHESUBJECTOFCIVILENGINEERINGSTRUCTURES,HOISTINGCONSTRUCTIONPLANSHALLBEPREPAREDLOADISLESSTHAN10TONNES,BUTSMALLCOMPLEXSHAPES,STIFFNESS,LENGTHDIAMETERRATIO,PRECISIONPRECIOUS,UNDERTHESPECIALCONDITIONSOFCONSTRUCTION,SHOULDALSOPREPARECONSTRUCTIONPROGRAMMESHOISTINGCONSTRUCTIONPROGRAMMESEXAMINEDBYTHEPROJECTAUTHORITIES,SUBMITTEDTOTHECOMPETENTVPAPPROVALTOBEIMPLEMENTED2LIFTINGOPERATIONSMUSTSETUPTHEALERTLINEANDSETUPSPECIALCARE,GUARDIANSHIPPERSONNELMUSTWEARARMBANDS,LIFTINGREGIONALSTAFFOUTOFBOUNDS3LIFTINGOPERATIONSMUSTBEPROVIDEDFORLIFTINGLOADS,SLINGS,RIGGINGANDECONOMICCALCULATIONOPTIONS,DONOTOVERLOADWHENLIFTINGHEAVYOBJECTSCLOSETOORREACHTHERATEDLIFTINGCAPACITY,CHECKBRAKES,LOWHEIGHT,SHORTSTROKEAFTERTHELOADTEST,THENSMOOTHLYLIFTEDLARGEANDMEDIUMSIZEDEQUIPMENTBEFORELIFTING,LOADTESTSHOULDBECARRIEDOUTTRYHANGINGHEIGHTFORABOUT02MANDTHENCONDUCTARELIABILITYCHECKINCLUDINGTHESELECTIONANDCALCULATIONOFSAFETYFACTOROVERLOADLIFTINGISSTRICTLYPROHIBITED4BEFORELIFTINGMUSTPADTHEWOODANDTHEWOODUSEDMUSTBEOFADEQUATESIZEBESURETOOVER1MWHENLIFTINGREQUIRESFIREESCAPE,YOUMUSTCONTACTTHECIRCUITBREAKERINACCORDANCEWITHTHEPROVISIONS5LIFTINGOPERATIONSMUSTBERUNONALLKINDSOFHOISTINGMACHINERYPARTS,SAFETYDEVICESASWELLASSLINGS,RIGGINGADETAILEDSECURITYCHECKS,SECURITYDEVICESFORLIFTINGEQUIPMENTISSENSITIVEANDRELIABLE,NOILLNESSMUSTTRYBEFORELIFTINGCRANE,CONFIRMEDBEFORETHEYCANWORK6LIFTINGOPERATIONS,REMOVEDPLATFORMGUARDRAILMUSTBERESTOREDTHEBOLTACTIVITYFENCEREMOVALISSTRICTLYPROHIBITED7LIFTINGOPERATIONS,SHOULDHAVEADEQUATELIGHTINGATNIGHT,OUTDOOR16,LIFTINGTHEAPPROVALPROCEDUREISNOTCOMPLETE,SECURITYMEASURESARENOT288（千米）288（千米）40565640（88104）9688（10496）（学生举例）（69172）2869（17228）两个加数交换位置，和不变。155（145207）（155145）207这叫做加法交换律。先把前两个数相加，或者先把后两个数相加，和不变。这叫做加法结合律。ABBAABCABC课后小结加法运算定律的运用教学内容P30/例3（加法运算定律的运用）教学目标能运用运算定律进行一些简便运算。培养学生根据具体情况，选择算法的意识与能力，发展思维的灵活性。使学生感受数学与现实生活的联系，能用所学知识解决简单的实际问题。教学过程一、复习巩固BLINDBOARDOPERATIONALSECURITYREQUIREMENTS1BLOCKINGBLINDBOARDOPERATIONSREQUIREDTOHANDLEBLOCKINGBLINDBOARDOPERATINGLICENSE,NOBLOCKINGBLINDBOARDOPERATINGLICENSEARENOTALLOWEDTOSMOKEBLOCKINGBLINDBOARDOPERATIONS2ITISSTRICTLYPROHIBITEDTOALTER,LENTTHEBLOCKINGBLINDBOARDOPERATINGLICENSECONTENTCONVERSIONANDEXPANSIONOFOPERATIONSORTRANSFERJOBSSITE,AGAINFORBLOCKINGBLINDBOARDOPERATINGLICENSE3INCOMPLETEJOBAPPROVALPROCEDURES,SAFETYMEASURESARENOTIMPLEMENTED,WORKENVIRONMENTDOESNOTMEETSECURITYREQUIREMENTS,WORKERSHAVETHERIGHTTOREFUSETOWORK4TOXICGASPIPING,EQUIPMENTBLOCKINGBLINDBOARD,NONIRRITANTGASPRESSURESHOULDBELESSTHAN200MMHGIRRITANTGASPRESSURESHOULDBELESSTHAN50MMHGGASTEMPERATURESHOULDBELESSTHAN60DEGREES5TECHNICALDEPARTMENTRESPONSIBLEFORDRAWINGBLINDLOCATIONMAP,NUMBERSTHEBLIND,CONSTRUCTIONPERSONNELWORK,BLINDLOCATIONMAPBYTECHNOLOGYARCHIVEFORFUTUREREFERENCE6THEBLINDPLUGOPERATINGPERSONNELMUSTWEARAPPROPRIATEPERSONALPROTECTIVEEQUIPMENT,MUSTDESIGNATEAPERSONRESPONSIBLEFORBLOCKINGBLINDBOARDWORK,ANDTODESIGNATEAPERSONRESPONSIBLEFORMONITORINGGUARDIANSAREADVISEDBYEXPERIENCEDOFFICERS,GUARDIANJOBSPEOPLEMUSTWEARAPPROPRIATEPROTECTIVEEQUIPMENTASREQUIRED,ANDGUARDIANSMUSTCHECK,IMPLEMENTINGRELEVANTSAFETYMEASURESONTHEJOBGUARDIANSMUS