数学运算符号的英文表达

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1、数学运算符号的英文表达小数、分数、百分数和运算符号1.小数表示法(1)小数的读法小数点左边的数通常按基数词读，若为三位以上的数，也可按编码式读法读出，即将数字单个读出；小数点右边的数通常按编码式读法单个读出。如：6.86sixpointeightsix14.15fourteenpointonefive345.456threefourfivepointfourfivesix或threehundredandforty－fivepointfourfivesix(2)小数中“0”的读法“0”在小数中通常读作nought（英）或zero（美），也可读作字母o。如：0.08（nought）point

2、noughteight或（zero）pointzeroeight9.07ninepointoseven2.百分数表示法百分数中的百分号％读作percent。如：6%读作sixpercent0.6%读作（nought）pointsixpercent500%读作fivehundredpercent3.倍数表示法倍数表示方法很多，如：Thisroomisfourtimesasbigasmine.这个房间是我房间的四倍。Thisroomisthreetimeslargerthanthatone.这个房间比那个房间大两倍。Theoutputofcoalhasdoubled.煤的产量增加了一倍。My

3、auntisasoldagainasIam.我姑姑年龄比我大一倍。Productivityisincreasedthreefold.生产效率提高了两倍。ThevolumeoftheSunisabout1,300,000timesthatoftheEarth.太阳的体积约为地球的1300000倍。4.加减乘除式的读法6+5＝11Sixplusfiveiseleven或Sixandfiveiseleven.11-6＝5Elevenminussixisfive.或Sixfromelevenisfive.4×5＝20Fourmultipliedbyfiveistwenty.或Fourtimesf

4、iveistwenty.20÷4＝5Twentydividedbyfourisfive.或Fourintotwentygoesfive.15:5＝3Theratiooffifteentofiveisthree.32Threesquaredisnine.23Twocubediseight.24Thefourthpoweroftwoissixteen.X^(1/2)=YThesquarerootofXisY.X^(1/3)=YThecubicrootofXisY.a＞baismorethanb.a＜baislessthanb.a≈baapproximatelyequalstob.a≠bais

5、notequaltob.5.分数表示法(1)较小分数的一般读写方法。如：1/3one-third2/3two-thirds3/5three-fifths(2)较复杂分数的简明读写方法。如22/9twenty-twooverninea/baoverb或adividedbyb43/97forty-threeoverninety-seven(3)整数与分数之间须用and连接。如：fourandahalfnineandtwofifths(4)分数用作前置定语时，分母要用单数形式。注意下列写法与读法。如：aone-thirdmile1/3英里athree-quartermajority3/4的多数

6、常用标点符号用法常用缩略语表．period句号，comma逗号：colon冒号；semicolon分号！exclamation惊叹号？questionmark问号￣hyphen连字符'apostrophe省略号；所有格符号—dash破折号‘’singlequotationmarks单引号“”doublequotationmarks双引号()parentheses圆括号[]squarebrackets方括号《》Frenchquotes法文引号；书名号...ellipsis省略号¨tandemcolon双点号"ditto同上ǁparallel双线号／virgule斜线号＆ampersand=

7、and～swungdash代字号§section;→arrow箭号；参见号＋plus加号；正号－minus减号；负号±plusorminus正负号×ismultipliedby乘号÷isdividedby除号＝isequalto等于号≠isnotequalto不等于号≡isequivalentto全等于号≌isequaltoorapproximatelyequalto等于或约等于号≈isapproximatelyequalto约等于