小學(xué)英語課件數(shù)字

ElementarySchoolEnglishPPTCoursewareNumbersCATALOGUE目錄DigitalalignmentBasicoperationsofnumbersAdvancedDigitalOperationsNumbersandLife01DigitalalignmentDefinitionDigitalrecognitionreferstothecognitiveprocessofhumanbrainindealingwithdigitalinformation,includingtheprocessofperception,memory,thinking,etcClassificationaccordingtothedepthofprocessing,digitalalignmentcanbedividedintosurfacelevelanddeeplevelSurfacelevelreferstothesimpleperceptionandmemoryofdigitalinformation,whiledeeplevelreferstotheunderstandingandthinkingofdigitalinformationDefinitionandclassificationStudentsneedtomasterthebasicknowledgeofEnglishwriting,includingthestructure,format,languagefeatures,etc.ofEnglishcompositionTheyshouldalsopayattentiontotheuseofnumericallanguageinEnglishcomposition,suchasnumericaldescription,timeexpression,etcWritingStudentsneedtolearntousetheappropriatelanguagetoexpresstheirideasTheyshouldpayattentiontotheuseofnumericallanguageinEnglishspeaking,suchascounting,timeexpression,etcExpressionWritingandexpressionofnumberDailylifestudentsneedtoapplytheknowledgeofEnglishnumericallanguageindailylife,suchascounting,timeexpression,measurementexpression,etcAcademicresearchinacademicresearch,studentsneedtoapplytheknowledgeofEnglishnumericallanguagetodescribeandanalyzedataandexperimentalresultsTheapplicationofnumbersin02BasicoperationsofnumbersDefinition:TheadditionoperationreferstocombiningtwoormorequantitiestogetherProcedure:Toperformaddition,weplacethenumbersonebelowtheotherandaddthecorrespondingdigitsThecarryoverdigitsareaddedtothenextcolumnExample:2+3=5AdditionoperationDefinition:SubtractionistheprocessofsubtractingonenumberfromanotherProcedure:Tosubtract,weplacetheminorbelowthesubtrahendandsubtractthecorrespondingdigitsIfthereisaborrowing,itisappliedtothenextcolumnExample:5-3=2SubtractionoperationDefinition:MultiplicationistheprocessofrepresentingonequantitybyanotherProcedure:Tomultiple,weplacethenumbersoneabovetheotherandmultiplethecorrespondingdigitsWealignthedigitsandaddthemtogetherExample:2x3=6MultiplicationoperationDefinition:DivisionistheprocessofdividingonenumberintoequalpartsProcedure:Todivide,weplacethedivideabovetheadvisoranddividethecorrespondingdigitsThequotaisobtainedbymovingthedecimalpointExample:6÷2=3Divisionoperation03AdvancedDigitalOperations要點三FractionalnumbersTheyarenumbersthathaveadenominator(topnumber)otherthan1Theycanbeexpressedasa/b,whereaisthenumerator(bottomnumber)andbisthedenominator(topnumber)要點一要點二OrderofoperationsFractionaloperationsshouldbeperformedinthefollowingorder:multiplication,division,addition,subtractionReducingfractionsWhenperformingoperationswithfractions,itispossibletoreducethefractionbyfindingacommonfactorForexample,4/8canbereducedto1/2要點三FractionaloperationDecimalnumbersTheyarenumbersthathaveadecimalpointTheycanbeexpressedasa.b,whereaisthewholenumberpartandbisthedecimalpartOrderofoperationsDecimaloperationsshouldbeperformedinthefollowingorder:addition,subtraction,duplication,divisionRoundingdecimalsWhenperformingoperationswithdecimals,itisnecessarytoroundtheresulttoaspecificnumberofdecimalplacesForexample,2.345canberoundedto2.35DecimaloperationPercentagesTheyarenumbersthatexpressapartof100Theycanbeexpressedasa%,whereaisthenumberofpartsoutof100ConvertingpercentagestodecimalnumbersToperformoperationswithpercentages,itisnecessarytoconvertthemtodecimalnumbersForexample,25%canbeconvertedto0.25CalculatingpercentagesTocalculateapercentageofanumber,multiplythenumberbythepercentageanddividetheresultby100Forexample,tocalculate25%of100,multiple100by0.25anddividetheresultby100PercentageoperationExponentialnumbersTheyarenumbersthathaveanexponentialorpowerTheycanbeexpressedasa^b,whereaisthebaseandbisthecomponentorpowerOrderofoperationsExponentialoperationsshouldbeperformedinthefollowingorder:multiple/divisionwithinthesamebase,addition/subsectionwithinthesamebase,explanationPropertiesofcomponentsComponentshavereceivedpropertiesthatcansimplifycalculationsForexample,whenmultiplenumberswiththesamebase,thecomponentsareaddedtogetherForexample,(a^m)*(a^n)=a^(m+n)Exponentialoperation04NumbersandLifeVSElementaryschoolstudentsshouldlearntotelltime,understandtheconceptoftime,anddevelopthehabitoffunctionalityTheyshouldalsolearntousedigitalclocksandanalogclocksDateawarenessStudentsshouldlearntheorderoftheweek,themeaningofeachdayoftheweek,andthedateofthemonthTheyshouldalsolearntousecalendarsoftwareandunderstandthemeaningofholidaysandspecialdaysTimemanagementTimeanddatePricecomparisonElementaryschoolstudentsshouldlearnhowtocomparepricesandchoosethemostcosteffectiveitemswhenshoppingTheyshouldalsound