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1、《梯形的面積計算》練習活動設計"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
