# 超全常用数学符号的英文表达方法

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1.Cardinals and Ordinals 基 数 和 序 数

(1)100 以内的数词

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XIV 14 fourteen 14th the fourteenth XV 15 fifteen 15th the fifteenth XVI 16 sixteen 16th the sixteenth XVII 17 seventeen 17th the seventeenth XVIII 18 eighteen 18th the eighteenth XIX 19 nineteen 19th the nineteenth XX 20 twenty 20th the twentieth XXI 21 twenty-one 21st the twenty-first XXV 25 twenty-five 25th the twenty-fifth XXX 30 thirty 30th the thirtieth XL 40 forty 40th the fortieth L 50 fifty 50th the fiftieth LX 60 sixty 60th the sixtieth LXX 70 seventy 70th the seventieth LXXX 80 eighty 80th the eightieth XC 90 ninety 90th the ninetieth IC 99 ninety-nine 99th the ninety-ninth C 100 one hundred 100th the hundredth CII 102 a hundred 102nd the (one) hundred and two and second 246 two hundred and forty-six 751 seven hundred and fifty-one

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(2)1000 以上的数词 1,000 = one thousand 一千 10,000 = ten thousand 一万 100,000 = one hundred thousand 十万 1,000,000 = one million 一百万 10,000,000 = ten million 一千万 100,000,000=one hundred million 一亿

(3)十亿以上的大数，英美有不同的读法： 英国 美国 十亿 one thousand million = one billion 百亿 ten thousand million = ten billion 千亿 one hundred thousand million = one hundred billion 万亿 one billion = one trillion

2.Fractions 分 数

1/2 = a (or one) half 1/3 = a (or one) third

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1/4 = a quarter or one fouth 1/5 = a (or one) fifth 2/3 = two thirds 9/10 = nine tenths 53/4 = five and three quarters 15/64= fifteen over (or by) sixty-four 15% = fifteen per cent 4‰ = four per mill

3.Decimals 小 数
0.4 = zero (or nought) point four

.01 = point (or decimal) nought one 12.34 = twelve point three four 567.809 = five hundred and sixty-seven point eight nought nine 30.45 = thirty point four five, five recurring 0.3% = decimal three percent

4.Mathematic Forms 数 学 式

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1+2=3： One and two are three. 2+3=5： Two plus three equals five. 4+0=4： Four and nought is equal to four. 45+70+152=267： 45,70 and 152 added are (or make) 267 the sum (or total) is 267.

(2)Subtraction 减法 9-4=5： Nine minus four equals (or is equal to) five. 15-7=8： Seven from fifteen leaves eight. 23,654-8,175=15,479 8,175： (take or subtracted) from 23,654 leaves 15,479. The difference(or The remainder) is 15,479.Nine from five won`t go.

(3)Multiplication 乘法 1×0=0： One multiplied by nought equals nought. 1×1=1： Once one is one. 2×1=2： Twice one is two. 3×5=15： Three times five is fifteen 6×0=0： Multiply six by nothing, and the result is nothing.

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(4)Division 除法 9÷3=3： Nine divided by three maks (or is equal to) three. 20÷5=4： Five into twenty goes four times. 4567÷23=198 余 13： 23 into 4567 goes 198 times, and 13 remainder. The quctient is 198, and 13 remainder.

5.Time 时 间
(1)Hours 钟点

2h.5'8" = two hours five minutes eight seconds 2 小时 5 分 8 秒 6.18 = six eighteen 6 时 18 分 8.30 a.m.= eight thirty a.m.['ei 'em] 上午 8 时 30 分 the 6.05 p.m.train = the six (nought) five p.m.['pi:'em] train 下午 6 时零 5 分列车 又二十四小时混合制的写法和读法如下： 0900 = 0 nine hunderd (上午)9 时 0910 = 0 nine ten (上午)9 时 10 分 1300 = thirteen hundred 13 时(下午 1 时) 1525 = fifteen twenty-five 15 时 25 分(下午 3 时 25 分) 2000 = twenty hundred 20 时(下午 8 时)

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at 5 o'c =at five o'clock 五点钟

(2)Date 日期 Oct.1 =October first 10 月 1 日 Oct.1st = October the first 10 月 1 日 Ist Oct. 1949 = teh first of October, nineteen forty-nine 1949 年 10 月 1日 3/5 = [英]May (the) third 5 月 3 日；[美]March fifth 3 月 5 日 [附注]联系日期前置词用 on.

(3)Year 年份 684 B.C. =Six eighty-four B.C. ['bi:'si:] 公元前 684 年 1960 = nineteen sixty; nineteen hundred and sixty 19- nineteen something 1950's nineteen fifties 二十世纪五十年代 [附注]联系年份的前置词用 in.

6.Numbers 号 码
(1)Telephones Numbers 电话号码

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1023 = one O two three; ten twenty-three 1227 = one double two (or two two) seven 0386 = O three eight six 0096 = double O(or O O )nine six 7000 = seven O double O = seven thousand No.26= Number 26 第 26 号 Room 201 = Room two O one 第 201 房间 10 Changan Street = Ten Changan Street 长安街 10 号

(2)Writings 书籍作品 Vol.I = Volume one (or the first volume) 卷一 Chap.II= Chapter two (or the second chapter) 第 2 章 Page 3 = page Three (or the third page) 第 3 页 See pp.5-10 = See Pages five to ten 见第 5-10 页 Act V = Act five (or the fifth act) 第 5 幕 Hamlet III 1:56 = Hamlet Act Three, Secene One.Line fifty-six 《哈姆雷 特》第 3 幕第一场第 56 行 Matt.7:12 = Matthew, Chapter Seven, Verse Twelve 《马可福音》第七章 第 12 节 Beethoven Op.49 = Beethoven Opus forty-nine 贝多芬作品第 49 号 4to = quarto 四本开 8vo = octavo 八本开

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(3)Other 其他 World War I = World War One 第一次世界大战 World War II = World War Two 第二次世界大战 Charles I= Charles the First 查理一世 Henry V = Henry the Fifth 亨利五世 Mr.- = Mr. Dash; Mr. So-and-so 某某先生 Mr.B - = Mr. B -Esq.,of -= the town of Blank Esquire of Blank University 某大学某某先 生 the town of = the town of Blank 某某城 The result of the game was 3-0 比赛结果是三比零。

7.Money 货 币
(1)British currency 英币

6d. = six pence 六便士 1/2d. = a halfpenny 半便士 11/2d. = a peney halfpenny or three halfpeny or three halfpence 一便士 半 1/4d. = a farthing 一个铜元 33/4d.= three pence three farghings 三便士三铜元

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1s.6d.(or 1/6) = one (shilling) and six (pence) 一先令六便士 ￡1.18 = (or￡1.18s.)= one pound eighteen (shillings) 一镑十八先令 ￡1.3s.6d. = one pound, three shillings (and) sixpence 4/51/2(or4s.51/2d.) = four (shillings) and five pence halfpenny

(2)U.S. currency 1.20 dollar (and) twenty (cents) 美金一元二角 4.25 = four dollars twenty-five cents 美金四元二角五分

(3)Soviet currency 前苏联币 6 Rb. 15 = six roubles fifteen kopecks 六卢布十五戈比

(4) German currency 德币 1 m. 60 = one mark sixty pfennig -马克六十芬尼

(5)French currency 法国币 1 fr.30 = one franc. thirty (centimes) -法郎三十生丁 0 fr.15 = fifteen centimes 十五生丁

(6) Chinese People's Currency 人民币 1.50 = one yuan and a half 一元五角 JMP 10.35 = JMP ten yuan thirty-five (fen) 人民币十元三角五分

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8. Weight and Measures 度 量 衡
(1)length,area, and volume 长度、面积和容积

3 in = three inches 三英寸 15 ft.5 in = fifteen foot five (inches) 十五英尺五英寸 [附注] 尤其在 inches 省略时, ft.读作 foot;如果 inches 也念出来， ft 可以读作 fett. 18'6 5/1"= eighteen foot six and a fifth (inches) 10×8feet= ten by eight feet 十英尺长，八英尺宽 5"×4×31/2 = five inches by four by three and a half 长五英寸，宽四英寸， 高三英寸半 [附注] 以上二例中，乘号× 表示面积或容积。

(2)Weight 重量 12 dr. 23 gr.= Twelve drams twenty-three grains 十二打兰二十三喱 10 oz. 4 dr. = Ten ounces four drams 十盎司打兰

(3)Capacity 容量 3 gi. = three gills 三及耳 1 qt. 1 pt = one quart one pint 一夸脱一品脱

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[附注] qt.,pt. 的复数是 qts.,pts.,也可以不加 s. 20 gal. 5 qt. =Twenty gallons five quarts 二十加仑五夸脱 5 bu. 3 pk. = Five bushels three pecks 五蒲式耳三配克

9. 各 类 常 用 的 运 算 符 号
+ plus 加号；正号

± × ÷ ＝ ≠ ≡ ≌ ≈ ＜ ＞ ≮ ≯

minus

plus or minus

is multiplied by 乘号 is divided by is equal to 除号 等于号 不等于号 全等于号 等于或约等于号

is not equal to is equivalent to

is equal to or approximately equal to is approximately equal to is less than 小于号 约等于号

is more than 大于号 is not less than 不小于号 is not more than 不大于号

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≤ ≥ % is less than or equal to is more than or equal to per cent 百分之… 小于或等于号 大于或等于号

‰ per mill 千分之… ∞ ∝ √ ∵ ∴ ∷ ∠ ? ? ○ π infinity varies as 无限大号 与…成比例 平方根

(square) root

since; because 因为 hence 所以 等于，成比例

equals, as (proportion) angle 角 半圆

semicircle circle 圆

circumference pi 圆周率 三角形

△ triangle ? ∪ ∩

perpendicular to union of 并，合集

intersection of 交，通集

∫ the integral of …的积分 ∑ (sigma) summation of ° degree 度 总和

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′ minute 分 ″ ℃ second 秒 Celsius system 摄氏度 左花括号 右花括号 左圆括号 右圆括号

{ open brace, open curly } close brace, close curly ( )

open parenthesis, open paren close parenthesis, close paren 括号

() brakets/ parentheses [ ] open bracket 左方括号 close bracket 右方括号

[] square brackets 方括号 . | period, dot 句号，点 vertical bar, vertical virgule 竖线 和，引用

& amp;

ampersand, and, reference, ref

* asterisk, multiply, star, pointer

/ slash, divide, oblique 斜线，斜杠，除号 // slash-slash, comment 双斜线，注释符 # pound 井号 \ backslash, sometimes escape 波浪符 反斜线转义符，有时表示转义符或续行符

~ tilde . ,

full stop 句号 comma 逗号

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: colon ; 冒号 分号 问号

semicolon

? question mark ! '

exclamation mark (英式英语) exclamation point (美式英语) apostrophe 撇号 连字号

- hyphen

-- dash 破折号 ... dots/ ellipsis " "" ‖ ～ 省略号

single quotation marks 单引号 double quotation marks 双引号 parallel 双线号 swung dash 代字号

§ section; division 分节号 → arrow 箭号；参见号

10. 希 腊 字 母
Αα：阿尔法 Alpha

Ββ：贝塔 Beta Γγ：伽玛 Gamma

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Δδ：德尔塔 Delte Δε：艾普西龙 Epsilon ζ ：捷塔 Zeta Εη：依塔 Eta Θθ：西塔 Theta Ιι：艾欧塔 Iota Κκ：喀帕 Kappa ∧λ：拉姆达 Lambda Μμ：缪 Mu Νμ：拗 Nu Ξν：克西 Xi Οξ：欧麦克轮 Omicron ∏π：派 Pi Ρρ：柔 Rho ∑σ：西格玛 Sigma Ττ：套 Tau Υυ：宇普西龙 Upsilon Φφ：fai Phi Χχ：器 Chi Ψψ：普赛 Psi Ωω：欧米伽 Omega