数学符号的英语读法

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1、数学符号的英语读法1.CardinalsandOrdinals基数和序数(1)100以内的数词基数序数RomanArabicNumeralsNumerals罗马数字阿拉伯数字读法数码读法I1one1stthefirstII2two2ndthesecondIII3three3rdthethirdIV4four4ththefourthV5five5ththefifthVI6six6ththesixthVII7seven7ththeseventhVIII8eight8ththeeighthIX9nine9ththeninthX10ten10ththetenthXI11eleven

2、11ththeeleventhXII12twelve12ththetwelfthXIII13thirteen13ththethirteenthXIV14fourteen14ththefourteenthXV15fifteen15ththefifteenthXVI16sixteen16ththesixteenthXVII17seventeen17ththeseventeenthXVIII18eighteen18ththeeighteenthXIX19nineteen19ththenineteenthXX20twenty20ththetwentiethXXI21twenty-o

3、ne21stthetwenty-firstXXV25twenty-five25ththetwenty-fifthXXX30thirty30ththethirtiethXL40forty40ththefortiethL50fifty50ththefiftiethLX60sixty60ththesixtiethLXX70seventy70ththeseventiethLXXX80eighty80ththeeightiethXC90ninety90ththeninetiethIC99ninety-nine99ththeninety-ninthC100onehundred100th

4、thehundredthCII102ahundred102ndthe(one)hundredandtwoandsecond246twohundredandforty-six751sevenhundredandfifty-one(2)1000以上的数词1,000=onethousand一千10,000=tenthousand一万100,000=onehundredthousand十万1,000,000=onemillion一百万10,000,000=tenmillion一千万100,000,000=onehundredmillion一亿(3)十亿以上的大数，英美有不同的读法：

5、英国美国十亿onethousandmillion=onebillion百亿tenthousandmillion=tenbillion千亿onehundredthousandmillion=onehundredbillion万亿onebillion=onetrillion2.Fractions分数通常将分子读为基数，将分母读为序数。1/2=a(orone)half1/3=a(orone)third1/4=aquarteroronefouth1/5=a(orone)fifth2/3=twothirds9/10=ninetenths53/4=fiveandthreequarter

6、s15/64=fifteenover(orby)sixty-four15%=fifteenpercent4‰=fourpermill3.Decimals小数0.4=zero(ornought)pointfour.01=point(ordecimal)noughtone12.34=twelvepointthreefour567.809=fivehundredandsixty-sevenpointeightnoughtnine30.45=thirtypointfourfive,fiverecurring0.3%=decimalthreepercent4.MathematicFo

7、rms数学式(1)Addition加法1+2=3Oneandtwoarethree.2+3=5Twoplusthreeequalsfive.4+0=4Fourandnoughtisequaltofour.45+70+152=26745,70and152addedare(ormake)267thesum(ortotal)is267.演算时的读法：Threeandsevenareten;Iwrite(orIwritedown,orIputdown)anoughtandcarryone.FourandonethatIca