IGCSE 数学考试注意要点PPT课件

GCSEMATHEMATICS,HOWTOIMPROVEYOURGRADETHEEASYWAY,2,EQUIPMENT:Moststudentsbringallthecorrectequipment(Pens,Pencils,Ruler,Anglemeasurer/protractor,Calculator)Howeverthereisalotofevidencewhichshowstheysimplydontuseit!DIAGRAMS:AlmostalldiagramsareNOTdrawntoscale.Manystudentsignorethisfact.Theysimplymeasureanglesandlineswithoutcalculatingthemandconsequentlygetnomarks.,3,READTHEQUESTION:ItisrecommendedthatyoureadthequestionTWICE.Thereisplentyoftime.Youcanunderlinetheimportantpartsofaquestionifyouwishto,4,CALCULATORSMakesureyoucanreadadisplaythatisinStandardForm.Nocreditisgivenforwritinganansweras1.6306.MakesureyourcalculatorissetintheDEGmode,5,FAMILIARISEYOURSELFWITHYOUROWNCALCULATORBRINGITTOSCHOOLEVERYDAYDONTRELYONTHESCHOOLSCALCULATORWHICHMAYHAVEADIFFERENTLOGICSYSTEMTOYOURS.,6,METHODS:WorkingoutMUSTbeshown.Therearealotofmethodmarksavailableanditisrecommendedthatallrelevantstagesofworkingareshown.IncorrectanswerandnoworkinggainsnomarksIfcorrectworkingisshownandacarelesserrorresultsinanincorrectansweryoucouldgain4outof5marksavailable,7,MATHSSPECIFICERRORS,8,PROBABILITYAverylargenumberofanswersarestillgivenas1in2or5outof1O.Theseareincorrect.Answersshouldbedecimals,fractionsorpercentages.Asageneralruleifthequestionusesfractionsthengiveyouranswerasafraction.Reminder:Aprobabilityanswercannotbegreaterthan1!,9,UNITSYouwillhavetogiveyourownunitsforatleastonequestion.Unitsoflength,volumeandareaarefrequentlymixedupbystudents.Learnthem.LearncommonMetrictoImperialconversions.eg1kg=2.2lbs,1mile=1.6Km.1Gallon=4.55Litresetc.Reminder:Thereare52weeksinayear.(Manystudentsuse50),10,UNITSEvenifnotaskedtoalwayswritedownunitsattheendofaquestionIfaquestioncontainsmmandcmitIsagoodideatoconvertalltothesame,11,ACCURACYDonotroundanswersoffuntiltheverylastlineofworking.Usethecalculatormemoryfunctionandnotationsuchas16.534.Thisisespeciallyimportantintrigonometryquestions.(Thereisasignificantdifferencebetween23x1.66and23x1.66666666)Ifyouareaskedtomeasurealineanditmeasures9.1cmuse9.1cm.Donotassumethatthelineissupposedtobe9cmlong.,12,TRIALANDIMPROVEMENTUsuallytherewillbeatableforyoutowriteyourattemptsin.Youdonotneedtofillinalltherows.Youmusthaveatleastonetrialaboveandonetrialbelowthecorrectanswer.,13,ANSWERSIfthequestionasksyoutogivetheanswerto1dp,2sforinStandardformyouwillloseatleastonemarkeverytimeyoufailtodoso.,14,PERCENTAGECHANGEWhenaskedforasalepricemanystudentsworkoutthereductioncorrectlybutthenfailtotakeitawayfromtheoriginalpricelosingatleast1mark,15,FORMULASHEETSMakesureyouknowwhatisgoingtobegivenyouonaformulasheet.Intermediate:Onlytheareaofatrapeziumandvolumeofaprismaregiven.Whatformulaedoyouneedtoknow?,16,ForborderlinegradeCstudentsItisalsousuallybesttoavoidtheveryhardestgradeBtopics(egTrigonometryandSimultaneousEquations)Thesecantakeupalotofrevisiontime.Theyactuallyarentworththatmanymarksandtherearequickerandeasiertopicstorevisefirst.,17,Youneedaround55%intheIntermediateGCSEMathsexampapertogetaMathsGCSEgradeC.DontjustconcentrateontheCgradequestions.Justasimportantaretheearlier(andeasier)questionsontheexampaper.MakesureyouhaverevisedthoroughlytheseeasiergradeDandgradeEquestionsTheseareworth50%oftheIntermediateGCSEMathsmarks.,18,HIGHERPAPERSONLYHOWTOGETGRADEA:RevisetheeasierquestionsYouneedaround60%intheHigherMathsGCSEexamtogetagradeA.CoverthoroughlytheeasiergradeCandgradeBquestions,asthesecoverthef