北师大版七年级下册整式乘除法

党的基层组织建设有了新突破，党的作风建设有了新加强，为全镇发展经济、提高人民生活永平提供了坚实基础和强大动力carriedout;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...C.weldingelbowshouldbenotlessthan1.5timesthepipediameter.D.Presselbowshouldbenotsmallerthantheoutsidediameterofthepipe.龙文教育教师1对1个性化教案学生姓名教师姓名邹玉芳授课日期3－9授课时段17-19课题教学目标1、教学步骤及教学内容教学过程：一、教学衔接（课前环节）1、回收上次课的教案，了解家长的反馈意见；2、检查学生的作业，及时指点3、捕捉学生的思想动态和了解学生的本周学校的学习内容二、教学内容知识点1、四则运算知识点2、位置与方向知识点3、三、教学辅助练习（或探究训练）练习1、练习2、练习3、四、知识总结1、知识、方法·技能2、目标完成3、学生掌握五、知识的延伸和拓展1、2、六、布置作业1、2、教导处签字：日期：年月日党的基层组织建设有了新突破，党的作风建设有了新加强，为全镇发展经济、提高人民生活永平提供了坚实基础和强大动力carriedout;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...C.weldingelbowshouldbenotlessthan1.5timesthepipediameter.D.Presselbowshouldbenotsmallerthantheoutsidediameterofthepipe.教学过程中学生易错点归类作业布置学习过程评价一、学生对于本次课的评价O特别满意O满意O一般O差二、教师评定1、学生上次作业评价O好O较好O一般O差2、学生本次上课情况评价O好O较好O一般O差家长意见家长签名：整式的乘除党的基层组织建设有了新突破，党的作风建设有了新加强，为全镇发展经济、提高人民生活永平提供了坚实基础和强大动力carriedout;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...C.weldingelbowshouldbenotlessthan1.5timesthepipediameter.D.Presselbowshouldbenotsmallerthantheoutsidediameterofthepipe.一：知识网络归纳22222()(,,)()()()():()()()2mnmnmnmnnnnaaaaamnabababmabmambmnabmambnanbababababaabb特殊的=幂的运算法则为正整数，可为一个单项式或一个式项式单项式单项式单项式多项式:多项式多项式：整式的乘法平方差公式　　乘法公式完全平方公式：幂的运算整式的乘法整式的除法因式分解同底数幂的乘法幂的乘方积的乘方同底数幂的除法零指数幂单项式乘以单项式单项式乘以多项式多项式乘以多项式单项式除以单项式多项式除以单项式提公因式法公式法平方差公式完全平方公式互逆变形平方差公式完全平方公式二：小试牛刀1、(－a)2·(－a)