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1、《梯形的面积计算》练习活动设计"Trapezoidalareacalculation〃exerciseactivitiesdesignTeachingcontent:textbooksnineteenth~21pagesTeachingtarget:1,makestudentsexperience,operate,observe,fillintheform,discuss,sumupandsoonmathematicsactivity,exploreandgraspthetrapezoidareaformula,cancorre
2、ctlycalculatethetrapezoidarea,andapplytheformulatosolvetheactualproblem.2,letstudentsfurtherunderstandthevalueoftransformationmethods,trainstudentstouseexistingknowledgetosolvenewproblems,developstudents'spatialconceptandpreliminaryreasoningability・Textbookanalysis:T
3、hisunitisbasedonthestudents，graspofthefeaturesoftheparallelogram,thetriangleandthetrapezoid,andthecalculationoftheareaofthelongsquare・Trapezoidareacalculationisinaparallelogram,thetriangleareaiscalculatedonthebasisofthefollowupstudy,here,studentshavemorechoice,canbet
4、ransformedintoladdermorehasbeenlearnedtofindthegraphicsareacalculationformula・Inpractice,stuclentshavedrawnparallellinesandhighfoundation,inthepastalsooftenhavehands-oncutting,spellingandfoldingactivities,andaccumulatedacertainamountofexperience・Bystudyingtheformulao
5、fparallelogramareacalculation,studentshavetheconsciousnessthattheyhavenotlearnedthegraphicsintothegraphicstheyhavelearned,andtheycansmoothlytranslateintothegraphicstheyhavelearnedbefore・Forthestudyofthestructureofplanegraphicsarea,andthroughthestudyanddiscussionofthe
6、triangle,thereisadeeperunderstandingoftheinternalconnectionbetweengraphicsandthetransformationbetweenthem.Atthesametime,students'abilitytoobserveandmathematicallanguage,graphicexpressionoftherelationshipbetweentheabilitytomakegreaterprogress・Teachingemphasis:understa
7、ndandmasterthecalculationformulaoftrapezoidareaTeachingdifficulties:understandingthedeductionprocessoftrapezoidalareaformulaTeachingprocess:First,review,import,revealthesubject1.Reviewthedeductionprocessoftriangleareaformula2Introduction:todaywecontinuetousethismetho
8、dtostudythecalculationoftrapezoidalarea・Two,cooperationandexchange,explorenewknowledge1,teachingexample6:(1)produceexample6:Teacher
