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返回课程 英国三年级【K3】Maths05.amandpm
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  • 目录
  • 问答
  • 笔记
  •  01.Reviewstrategiesforaddingandsubtractingacross10
  • 0:0 免费01.Add3numberstogetherusingdoub ...
  • 0:0 免费02.Add3numberstogetherindiffere ...
  • 0:0 免费03.Numberscanbeaddedinanyorder
  • 0:0 免费04.Addthreeaddendsbyfindingpair ...
  • 0:0 免费05.Addthreeaddendsefficientlyus ...
  • 0:0 免费06.Additionbybridgingthrough10
  • 0:0 免费07.Subtractingsmallnumbers
  • 0:0 免费08.Subtractingtoandfrom10
  • 0:0 免费09.Subtractingnumbersthatbridge ...
  • 0:0 免费10.Solvingproblemsinvolvingaddi ...
  •  02.Securingplacevalueto100andapplyingtoadditionandsubtraction
  • 0:0 免费01.Compositionof100in10sand1s
  • 0:0 免费02.Compositionof100in50s,25sand ...
  • 0:0 免费03.Multiplesof10thattotal100
  • 0:0 免费04.Useknownfactstofindpairsofnu ...
  • 0:0 免费05.Useknownfactstofindcomplemen ...
  • 0:0 免费06.Represent3-digitmultiplesof1 ...
  • 0:0 免费07.Useplacevalueknowledgetowrit ...
  • 0:0 免费08.Bridge100byaddinginmultiples ...
  • 0:0 免费09.Bridge100bysubtractinginmult ...
  • 0:0 免费10.Solveproblemsusingknowledgeo ...
  •  03.Bridging100countingonandbackin10s,addingsubtractingmultiplesof10
  • 0:0 免费01.Countacrossandonfrom100
  • 0:0 免费02.Representa3-digitnumberupto1 ...
  • 0:0 免费03.Bridge100byaddingorsubtracti ...
  • 0:0 免费04.Find10moreor10lessthanagiven ...
  • 0:0 免费05.Crossthehundredsboundarywhen ...
  •  04.Measuringlengthandrecordingintables
  • 0:0 免费01.Estimateinmetresanddescribea ...
  • 0:0 免费02.Measurelengthandheightfromze ...
  • 0:0 免费03.Convertingbetweenmetresandce ...
  • 0:0 免费04.Millimetresasaunitofmeasurea ...
  • 0:0 免费05.Measuringlengthandheightusin ...
  • 0:0 免费06.Convertingbetweencentimetres ...
  • 0:0 免费07.Estimateandmeasurelengthsand ...
  • 0:0 免费08.Usinggraphstorepresentlength ...
  • 0:0 免费09.Solveproblemsinvolvinglength
  • 0:0 免费10.Solveproblemsinvolvinglength ...
  •  05.Representing3-digitnumbers,comparingandpositioningonnumberlines
  • 0:0 免费01.Representa3-digitnumberupto1 ...
  • 0:0 免费02.Countforwardsandbackwardswit ...
  • 0:0 免费03.Position3-digitnumbersonnumb ...
  • 0:0 免费04.Estimatethepositionof3-digit ...
  • 0:0 免费05.Comparingandorderingnumbersw ...
  • 0:0 免费06.Orderingsetsof3-digitnumbers
  • 0:0 免费07.Useknownfactstoaddandsubtrac ...
  • 0:0 免费08.Writea3-digitmultipleof10asa ...
  • 0:0 免费09.Partition3-digitnumbersindif ...
  • 0:0 免费10.Useknownfactstosolveproblems ...
  • 0:0 免费11.Useknownfactstoaddandsubtrac ...
  • 0:0 免费12.Addandsubtracttoandfroma3-di ...
  • 0:0 免费13.Solveproblemsbyaddingandsubt ...
  • 0:0 免费14.Countforwardsandbackwardsinm ...
  • 0:0 免费15.Solveproblemsbycountingforwa ...
  •  06.Measuresmassandcapacity
  • 0:0 免费01.Becomefamiliarwithscaleswith ...
  • 0:0 免费02.Measurethemassofobjectsusing ...
  • 0:0 免费03.Measuremassinwholekilogramsa ...
  • 0:0 免费04.Understandingcapacityandvolu ...
  • 0:0 免费05.Measuringthevolumeofliquidsu ...
  • 0:0 免费06.Measurevolumeinwholelitresan ...
  • 0:0 免费07.Comparingandestimatingmassan ...
  • 0:0 免费08.Estimatethenmeasuremassandvo ...
  • 0:0 免费09.Solveproblemsinvolvingmass
  • 0:0 免费10.Solveproblemsinvolvingvolume
  •  07.Rightangles
  • 0:0 免费01.Makedifferentsizedanglesbyro ...
  • 0:0 免费02.Identifyanddescriberightangl ...
  • 0:0 免费03.Knowthatarightangledescribes ...
  • 0:0 免费04.Identifypropertiesoftriangle ...
  • 0:0 免费05.Identifypropertiesofquadrila ...
  • 0:0 免费06.Knowthatarectangleisafour-si ...
  • 0:0 免费07.Knowthatasquareisarectanglei ...
  • 0:0 免费08.Investigatetheshapesmadewhen ...
  • 0:0 免费09.Joinfourrightanglesatapointu ...
  • 0:0 免费10.Investigateanddrawotherpolyg ...
  •  08.Informalandmentalstrategiesforaddingandsubtractingtwo3-digitnumbers
  • 0:0 免费01.Addtwo3-digitnumbersusingpar ...
  • 0:0 免费02.Addtwo3-digitnumbersusingadj ...
  • 0:0 免费03.Add2and3-digitnumbersbyredis ...
  • 0:0 免费04.Choosethemostefficientstrate ...
  • 0:0 免费05.Subtract2or3-digitnumbersusi ...
  • 0:0 免费06.Subtractapairof2-digitnumber ...
  • 0:0 免费07.Subtract3-digitmultiplesof10 ...
  • 0:0 免费08.Choosethemostefficientstrate ...
  • 0:0 免费09.Useadditionandsubtractiontos ...
  • 0:0 免费10.Useadditionandsubtractiontos ...
  •  09.Understandadditiverelationshipsandapplythemtorearrangeequations
  • 0:0 免费01.Usetheadditiverelationshipto ...
  • 0:0 免费02.Usetheadditiverelationshipto ...
  • 0:0 免费03.Understandtherelationshipbet ...
  • 0:0 免费04.Identifyknownsandunknownsina ...
  • 0:0 免费05.Identifyknownsandunknownsins ...
  • 0:0 免费06.Usetheadditiverelationshipto ...
  • 0:0 免费07.Solveproblemsusingbarcharts, ...
  • 0:0 免费08.Understandwhytheorderofaddit ...
  • 0:0 免费09.Solvemulti-stepadditionandsu ...
  • 0:0 免费10.Solveoneandtwo-stepproblemsi ...
  •  10.Columnaddition
  • 0:0 免费01.Identifytheaddendsandthesumi ...
  • 0:0 免费02.Useplacevaluetocorrectlylayo ...
  • 0:0 免费03.Add2-digitnumbersusingcolumn ...
  • 0:0 免费04.Add3-digitnumbersusingcolumn ...
  • 0:0 免费05.Usecolumnadditiontosolveprob ...
  • 0:0 免费06.Usecolumnadditiontoaddnumber ...
  • 0:0 免费07.Usecolumnadditiontoaddnumber ...
  • 0:0 免费08.Usecolumnadditionwithregroup ...
  • 0:0 免费09.Useknownfactsandstrategiesto ...
  • 0:0 免费10.Usecolumnadditionwithregroup ...
  •  11.2,4and8timestablesusingtimestablestosolveproblems
  • 0:0 免费01.Representcountinginfoursasth ...
  • 0:0 免费02.Useknowledgeofthe4timestable ...
  • 0:0 免费02.Useknowledgeofthe4timestable ...
  • 0:0 免费03.Useknowledgeofthe4timestable ...
  • 0:0 免费03.Useknowledgeofthe4timestable ...
  • 0:0 免费04.Explaintherelationshipbetwee ...
  • 0:0 免费05.Useknowledgeoftherelationshi ...
  • 0:0 免费06.Representcountingineightsast ...
  • 0:0 免费07.Explaintherelationshipbetwee ...
  • 0:0 免费07.Explaintherelationshipbetwee ...
  • 0:0 免费08.Explaintherelationshipbetwee ...
  • 0:0 免费09.Useknowledgeoftherelationshi ...
  • 0:0 免费10.Explaintherelationshipbetwee ...
  • 0:0 免费11.Useknowledgeoftherelationshi ...
  • 0:0 免费12.Useknowledgeofthedivisibilit ...
  • 0:0 免费13.Useknowledgeofthedivisibilit ...
  • 0:0 免费14.Scaleknownmultiplicationfact ...
  • 0:0 免费15.Scaledivisionsderivedfrommul ...
  •  12.Columnsubtraction
  • 0:0 免费01.Identifytheminuendandsubtrah ...
  • 0:0 免费02.Usecolumnsubtractiontosubtra ...
  • 0:0 免费03.Subtractfroma2-digitnumberus ...
  • 0:0 免费04.Subtractfroma3-digitnumberus ...
  • 0:0 免费05.Makeefficientuseofsubtractio ...
  •  13.Unitfractionsaspartofawhole
  • 0:0 免费01.Identifyawholeandthepartstha ...
  • 0:0 免费02.Explainwhyapartcanonlybedefi ...
  • 0:0 免费03.Identifythenumberofequalorun ...
  • 0:0 免费04.Identifyequalpartswhentheydo ...
  • 0:0 免费05.Explainthesizeofapartinrelat ...
  • 0:0 免费06.Constructawholewhengivenapar ...
  • 0:0 免费07.Identifyhowmanyequalpartsawh ...
  • 0:0 免费08.Usefractionnotationtodescrib ...
  • 0:0 免费09.Representunitfractionsindiff ...
  • 0:0 免费10.Solveproblemsinvolvingidenti ...
  •  14.Identifypartsandwholesindifferentcontexts
  • 0:0 免费01.Identifypartsandwholesinthec ...
  • 0:0 免费02.Identifypartsandwholesindiff ...
  • 0:0 免费03.Identifyequalpartsinawholewh ...
  • 0:0 免费04.Identifyequalpartsinawholewh ...
  • 0:0 免费05.Solveproblemsbyidentifyingpa ...
  •  15.Compareandorderunitfractions
  • 0:0 免费01.Compareunitfractionsbylookin ...
  • 0:0 免费02.Compareandorderunitfractions ...
  • 0:0 免费03.Identifywhenunitfractionscan ...
  • 0:0 免费04.Solveproblemsinvolvingcompar ...
  • 0:0 免费05.Solveproblemsinvolvingcompar ...
  •  16.Calculatethevalueofapart(fractionsasoperators)
  • 0:0 免费01.Constructingawhole
  • 0:0 免费02.Useknowledgeoftherelationshi ...
  • 0:0 免费03.Usepartsandwholestofindaunit ...
  • 0:0 免费04.Calculatethevalueofpartsandw ...
  • 0:0 免费05.Connectdivisionwithfindingaf ...
  •  17.Non-unitfractions
  • 0:0 免费01.Explainthatnon-unitfractions ...
  • 0:0 免费02.Identifynon-unitfractions
  • 0:0 免费03.Identifyingequalpartsinawhol ...
  • 0:0 免费04.Useknowledgeofnon-unitfracti ...
  • 0:0 免费05.Useknowledgeofunitfractionst ...
  • 0:0 免费06.Placefractionsbetween0and1on ...
  • 0:0 免费07.Comparenon-unitfractionswith ...
  • 0:0 免费08.Reviewcomparingunitfractions
  • 0:0 免费09.Comparefractionswiththesamen ...
  • 0:0 免费10.Comparenon-unitfractionsincl ...
  •  18.Compositionofnon-unitfractionsadditionandsubtraction
  • 0:0 免费01.Userepeatedadditionofaunitfr ...
  • 0:0 免费02.Userepeatedadditionofaunitfr ...
  • 0:0 免费03.Addfractionswiththesamedenom ...
  • 0:0 免费04.Addonfractionswiththesameden ...
  • 0:0 免费05.Addfractionswiththesamedenom ...
  • 0:0 免费06.Subtractfractionswiththesame ...
  • 0:0 免费07.Addandsubtractfractionswitht ...
  • 0:0 免费08.Explainthatadditionandsubtra ...
  • 0:0 免费09.Subtractfractionsfromawholeb ...
  • 0:0 免费10.Substituteafractionrepresent ...
  •  19.Parallelandperpendicularsidesinpolygons(andperimeter)
  • 0:0 免费01.Makeshapesbyjoiningtwopolygo ...
  • 0:0 免费02.Investigatedifferentwaysofde ...
  • 0:0 免费03.Drawpolygonsonisometricpaper
  • 0:0 免费04.Constructquadrilateralswitha ...
  • 0:0 免费05.Makeanddrawshapeswithandwith ...
  • 0:0 免费06.Identifyingparallellines
  • 0:0 免费06.Identifyingparallellines_1
  • 0:0 免费07.Makeanddrawtrianglesoncircul ...
  • 0:0 免费08.Makeanddrawquadrilateralsonc ...
  • 0:0 免费09.Drawshapeswithgivenpropertie ...
  • 0:0 免费10.Drawshapeswithgivenpropertie ...
  •  20.Tellthetimetothenearestminuteandcompareunitsoftime
  • 0:0 免费01.Tellandwritethetimetothenear ...
  • 0:0 免费02.Tellandwritethetimetothenear ...
  • 0:0 免费03.Estimateandcomparetheduratio ...
  • 0:0 免费03.Estimateandcomparetheduratio ...
  • 0:0 免费04.Tellandwritethetimeincluding ...
  • 0:0 免费05.amandpm
  • 0:0 免费06.Knowthenumberofdaysineachmon ...
  • 0:0 免费07.Howmanysecondsinaminute
  •  21.Numbersenseandexploringcalculationstrategies
  • 0:0 免费01.ExploringNumberSense
  • 0:0 免费02.DerivingNewFactsFromNumberBo ...
  • 0:0 免费03.Numbernames
  • 0:0 免费04.Recognisingthevalueofeachdig ...
  • 0:0 免费05.Usingcomparativesymbolstocom ...
  • 0:0 免费06.DerivingNewFactsFromNumberBo ...
  • 0:0 免费07.Findingnumberbondsfornumbers ...
  • 0:0 免费08.Applyingnumberbondswithinten ...
  • 0:0 免费09.Applyingnumberbondswithintwe ...
  • 0:0 免费10.Addingandsubtractingusingrou ...
  • 0:0 免费11.Usingroundandadjuststrategie ...
  • 0:0 免费12.Usingan𧫝ingon'strategytofin ...
  • 0:0 免费13.Usingbarmodelstosolvewordpro ...
  • 0:0 免费14.Usingbarmodelstosolvewordpro ...
  • 0:0 免费15.ApplicationLesson
  •  22.Placevalue
  • 0:0 免费01.Readingandwriting3digitnumbe ...
  • 0:0 免费02.Partitioningnumbersindiffere ...
  • 0:0 免费03.Orderingandcomparing3digitnu ...
  • 0:0 免费04.Addingandsubtracting3digitnu ...
  • 0:0 免费05.Rounding2and3digitnumberstot ...
  • 0:0 免费06.Findingallpossiblenumberstha ...
  • 0:0 免费07.Rounding2and3digitnumberstot ...
  • 0:0 免费08.Applyingplacevalueknowledget ...
  • 0:0 免费09.Findingsolutionstoaproblem
  • 0:0 免费10.Placevalueapplicationlesson
  •  23.Graphs
  • 0:0 免费01.Readingandunderstandingpicto ...
  • 0:0 免费02.Constructingpictograms
  • 0:0 免费03.Readingandinterpretingbargra ...
  • 0:0 免费04.Collectingandpresentingdatau ...
  • 0:0 免费05.Interpretingandpresentingdat ...
  •  24.Additionandsubtraction
  • 0:0 免费01.Addingandsubtracting1-digitn ...
  • 0:0 免费02.Addingmultiplesof10to3-digit ...
  • 0:0 免费03.Subtractingmultiplesof10from ...
  • 0:0 免费04.Addingandsubtractingmultiple ...
  • 0:0 免费05.Addingtwo3-digitnumbers(with ...
  • 0:0 免费06.Subtractingtwo3-digitnumbers ...
  • 0:0 免费07.Applyingroundingforestimatin ...
  • 0:0 免费08.Applyingroundingforestimatin ...
  • 0:0 免费09.Addingtwo3-digitnumbers(regr ...
  • 0:0 免费10.Addingtwo3-digitnumbers(regr ...
  • 0:0 免费11.Subtracting3-digitnumbers(re ...
  • 0:0 免费12.Subtracting3-digitnumbers(re ...
  • 0:0 免费13.Subtracting3-digitnumbers(re ...
  • 0:0 免费14.Solvingadditionandsubtractio ...
  • 0:0 免费15.Solvingwordproblemswithunkno ...
  •  25.Lengthandperimeter
  • 0:0 免费01.Measuringlengthstothenearest ...
  • 0:0 免费02.Measuringlengthanddrawinglin ...
  • 0:0 免费03.MakingAppropriateEstimatesof ...
  • 0:0 免费04.LengthandMeasurementApplicat ...
  • 0:0 免费05.Tocalculateperimetersof2Dsha ...
  • 0:0 免费06.ToCalculatePerimetersof2DSha ...
  • 0:0 免费07.Measuringandcomparinglengthi ...
  • 0:0 免费08.Calculatingtheperimetersofsh ...
  • 0:0 免费09.Applyingproblemsolvingstrate ...
  • 0:0 免费10.Lengthandperimeterapplicatio ...
  •  26.Multiplicationanddivision
  • 0:0 免费01.Recallingthe3timestable
  • 0:0 免费02.Recallingthe4timestable
  • 0:0 免费03.Usingarraystorepresentthe3an ...
  • 0:0 免费04.Understandingmultiplicationc ...
  • 0:0 免费05.Usingbarmodelstorepresentkno ...
  • 0:0 免费06.Understandingthatmultiplicat ...
  • 0:0 免费07.Usingtheinverseoperationtofi ...
  • 0:0 免费08.Recallingmultiplicationanddi ...
  • 0:0 免费09.Usingfactorsandproductstosol ...
  • 0:0 免费10.Consolidatingmultiplicationa ...
  • 0:0 免费11.Solvingcorrespondenceproblem ...
  • 0:0 免费12.Usingdoublestomultiply
  • 0:0 免费13.Usingtentimesgreaterforknown ...
  • 0:0 免费14.Usingbarmodelstorepresentwor ...
  • 0:0 免费15.Consolidatingmultiplicationa ...
  •  27.Derivingmultiplicationanddivisionfacts
  • 0:0 免费01.Lookingatmultiplicationstrat ...
  • 0:0 免费02.Multiplyingnumbersby10and100
  • 0:0 免费03.Linkingplacevalueandmultipli ...
  • 0:0 免费04.Dividingby10usingplacevalue
  • 0:0 免费05.Multiplyinganddividingby100
  • 0:0 免费06.Exploringdivisionstrategies
  • 0:0 免费07.Derivingnewfactsfrommultipli ...
  • 0:0 免费08.Usingarraystomultiplya2digit ...
  • 0:0 免费09.UsingDienestomultiplya2digit ...
  • 0:0 免费10.Exploringcommutativityinmult ...
  • 0:0 免费11.Exploringcommutativity
  • 0:0 免费12.Dividingbyaonedigitnumber(no ...
  • 0:0 免费13.Solvingmultiplicationanddivi ...
  • 0:0 免费14.Solvingmultiplicationanddivi ...
  • 0:0 免费15.Identifyingknownandunknownre ...
  •  28.Time
  • 0:0 免费01.Understandingthatclockshavem ...
  • 0:0 免费02.Readinganaloguetimetothenear ...
  • 0:0 免费03.Tellingthetimetoamandpm
  • 0:0 免费04.Telling'minutespast'onadigit ...
  • 0:0 免费05.Readingandorderingtime(prese ...
  • 0:0 免费06.Exploringunitsofmeasuredtime
  • 0:0 免费07.Measuringtimeinseconds
  • 0:0 免费08.Calculatingandcomparinginter ...
  • 0:0 免费09.Applyingknowledgeoftimetosol ...
  • 0:0 免费10.Furtherapplyingknowledgeofti ...
  •  29.Fractions
  • 0:0 免费01.Todescribethepartwholerelati ...
  • 0:0 免费02.Torecognisepartsthatareequal ...
  • 0:0 免费03.Torecognise,identifyanddescr ...
  • 0:0 免费04.Tofindunitfractionsofagivenq ...
  • 0:0 免费05.Todescribeunitandnon-unitfra ...
  • 0:0 免费06.ToIdentifyanddescribenon-uni ...
  • 0:0 免费07.Findingnon-unitfractionsofqu ...
  • 0:0 免费08.Consolidatingfindingnon-unit ...
  • 0:0 免费09.Comparingfractionswiththesam ...
  • 0:0 免费10.Compareandorderunitfractions
  • 0:0 免费11.FractionsRecognisingequivale ...
  • 0:0 免费12.FractionsRecognisingequivale ...
  • 0:0 免费13.FractionsAddingfractionswith ...
  • 0:0 免费14.FractionsSubtractingfraction ...
  • 0:0 免费15.FractionsToreviselearningonf ...
  •  30.Anglesandshape
  • 0:0 免费01.Toidentifyandrecogniseangles
  • 0:0 免费02.Toidentifyanglesinside2Dshap ...
  • 0:0 免费03.Torecogniserightangles
  • 0:0 免费04.Torecogniseobtuseandacuteang ...
  • 0:0 免费05.Toreviseangles
  • 0:0 免费06.Toidentifyperpendicularlines
  • 0:0 免费07.Todrawperpendicularlines
  • 0:0 免费08.Toidentifyandexplainparallel ...
  • 0:0 免费09.Toreviseparallelandperpendic ...
  • 0:0 免费10.Toidentifyrectanglesincludin ...
  • 0:0 免费11.Todescribe2-Dshapesbasedonth ...
  • 0:0 免费12.Todraw2-Dshapesbasedontheirp ...
  • 0:0 免费13.Todescribethepropertiesof3Ds ...
  • 0:0 免费14.ToIdentifyandDescribeLinesof ...
  • 0:0 免费15.Toreviseshapes
  •  31.Measures
  • 0:0 免费01.Readingweighingscaleswithdif ...
  • 0:0 免费02.Weighingandcomparingmassesin ...
  • 0:0 免费03.Estimatingmasses
  • 0:0 免费04.Measuringvolume
  • 0:0 免费05.Measuringandcomparingcapacit ...
  • 0:0 免费06.Estimatingcapacity
  • 0:0 免费07.Massandcapacity
  • 0:0 免费08.Usingbarmodelsforadditionand ...
  • 0:0 免费09.Drawingbarmodelstorepresentw ...
  • 0:0 免费10.Usingbarmodelstorepresentadd ...
  • 0:0 免费11.Usingbarmodellingtorepresent ...
  • 0:0 免费12.Drawingbarmodelstorepresentm ...
  • 0:0 免费13.Usingbarmodelstorepresentmea ...
  • 0:0 免费14.Drawingbarmodelstohelpuswith ...
  • 0:0 免费15.Solvingproblemsusingmeasures
  •  32.Securingmultiplicationanddivision
  • 0:0 免费01.Commutativitybetweenmultipli ...
  • 0:0 免费02.Useknownmultiplicationfactst ...
  • 0:0 免费03.Useknownmultiplicationfactst ...
  • 0:0 免费04.Multiply2-digitnumbersby6usi ...
  • 0:0 免费05.Multiply2-digitnumbersby8usi ...
  •  33.Exploringcalculationstrategiesandplacevalue
  • 0:0 免费01.Applyingarangeofstrategiesto ...
  • 0:0 免费02.Applyingarangeofstrategiesto ...
  • 0:0 免费03.Applyingadditionandsubtracti ...
  • 0:0 免费04.Usingcommutativityandassocia ...
  • 0:0 免费05.Usingdoublingorhalvingtocalc ...
  • 0:0 免费06.Identifyingvaluesinfourdigit ...
  • 0:0 免费07.Comparingfourdigitnumbers
  • 0:0 免费08.Comparingandorderingfourdigi ...
  • 0:0 免费09.Addingandsubtracting1000
  • 0:0 免费10.Roundingtothenearestmultiple ...
  •  34.Fractionspartsandwholes
  • 0:0 免费01.Explorethewholeandpartrelati ...
  • 0:0 免费02.Explorethewholeandpartrelati ...
  • 0:0 免费03.ExploretheConceptofɾqual'an ...
  • 0:0 免费04.Embedtheconceptofequalpartsa ...
  • 0:0 免费05.Developunderstandingthatequa ...
  • 0:0 免费06.Comparethesizeofpartswhenthe ...
  • 0:0 免费07.Explorethatsizeofpartisrelat ...
  • 0:0 免费08.Considerpartwholerelationshi ...
  • 0:0 免费09.Buildawholewhenapartisknown
  • 0:0 免费10.Exploredifferentcontextsforb ...
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