新加坡 小学数学 Math Stars Grade 3.pdf

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1、Vol.3No.1★★1.Fredbuysapencilfor30cents.★★★4.Takeasheetofpaper.Folditinhalf.Sheilapayswith2quarters.HowmanyWithoutopeningupthesheetofpaper,folditindifferentwayscanSheilagetmoneyback?halfagain.IfyouopenedupyoursheetofpaperAnswer_________.Listallofthewaysnow,howmanysectionswou

2、ldtherebe?Openupbelow.yoursheettocheckoutyouranswer!Repeatthisprocressseveraltimes,eachtimeaddingonemorefoldtoyoursheetofpaper.Doyouseeapattern?NumberofFoldsNumberofSections★★2.Examinethelettersbelow.Which01aresymmetric?Drawalllinesofsymmetry12onthelettersthataresymmetric.2

3、3456ENSXStrategyoftheMonthSomeonesaid,"Apictureisworthathousandwords."Turningthewordsofaproblemintoa★★★3.Jason,Trini,andBillyarepictureoradiagramcanhelpyou"see"thearguingoverwhowillbefirst,second,andproblem.Byusingthepartofyourbrainthatthirdinlineforlunch.Howmanydifferentvi

4、sualizesasituationorobject,youmayseewayscantheylineup?relationshipsorinformationthathelpsyousolvetheproblem.Whensomeonetellsyouastory,tryturningthewordsintoamotionpictureoracartoon.Whenreadingadescrip-tion,try"seeingitinyourmind'seye."Ifyoucandothesethings,thisstrategymaybe

5、foryou!Tryusingapictureormakeadiagramtosolvethisproblem:Everybikeslotinabicyclerackwasfilled.Donna'sbikewasinthemiddle.ThereweresixbikestotherightofDonna's.Howmanybicycleswereinthebicyclerack?★★7.HowmanydotsareinthenextsquareinMathStarsHomeHintsthissequence?Everyyearyougrow

6、andchangeinmanydifferentways.Getsomeonetohelpyoumeasureandrecordthesedataaboutyour-••••self.•••••••Howtallareyou?_____________________•••••••••••••••••••Howmuchdoyouweigh?______________★★8.HowmanystudentsareinMrs.Whatisthecircumferenceofyourhead?Lander'sclass?______________

7、___________________WhatfractionofstudentsinMrs.Lander'sclasshavebirthdaysinJune?__________★★5.Drawtheflipoftheshadedfiguretocreateasymmetricalshape.Inwhichmonthwereyouborn?..........................................................................................XXXXXX★6.Are

8、youasquare?MeasureyourselftoXXXXXXXfindout!YoumayhaveafriendmarkyourXXXXXXXXXXXXhe