资源描述：
《比的基本性质（basic properties of ratio）》由会员上传分享，免费在线阅读，更多相关内容在工程资料-天天文库。
1、比的基本性质（Basicpropertiesofratio）"Ratioofbasicnature"classhourteachingplanMainandbackup:ChenJianyong'steachingperiodinNovember19,2012ContentofcoursesP70-71case3,case4andthecorresponding"practiceandpractice",exercisethirteen,No.6-8Howmanyhours?EightlessontypePresentationWhat'sthefirstclass?Two
2、teachingtarget1,enablestudentstounderstandandgraspthebasicnatureoftheratiointherealsituation,masterthemethodofsimplifyingtheratio,cancorrectlyapplythebasicnatureoftheratioofsimplification.2,throughteachingtocultivatestudents'abstractgeneralizationability,infiltrationofthetransformationofma
3、thematicalthinking,andmakestudentsunderstandtheexistenceofthingsareintrinsicallylinked.3,toenablestudentstoexperienceinsolvingsimplepracticalproblemsthanthedescriptionofthephenomenaoflife,inclosecontactwiththedailylifeexperiencethantheapplicationvalue,feelmathematicalknowledgeandmethods,en
4、hancetheconsciousnessofindependentexplorationandcooperationandexchanges,enhancetheconfidencetolearnmathematics.teachingHeavyanddifficultpointsKeypoints:understandingandmasteringthebasicpropertiesofratio.Difficulty:theprincipleof"0exception"inthebasicnatureofcomprehensionratio.teachingResou
5、rcesStudentshavelearnedthebasicpropertiesofquotientinvariantpropertiesandfractions,andunderstoodtherelationbetweenscoreanddivision.Theseknowledgeandexperienceareofgreathelptothebasicnatureofstudents'understandingandlearningratio.Althoughstudentshaveacertainknowledgeexperience,butlackofsyst
6、ematicarrangement,butmoststudentsshouldbeabletoindependentlyexplorethebasisofthelearningresourcesprovided,andcanfindthebasicnature.PreviewDesign1.1383019(18=)/()=()():Talkabouttheconnectionanddifferencebetweendivision,fractionandratio2.2/3=()/12=10/()=()/()Whatisthebasisforfillinginthis?3.
7、seekthefollowingratios.Whathaveyoufound?2:35:41.5:1.216:24,1/2:2,4:14.selftaughttextbooks,seventieth~71pages,examples3,examples4.Firsttrytoanswerexample3,example4,afterfinishing,andBookcontrol.Thinking:howdoesinteger,fraction,decimalformthesimplestintegerratio
