常用数学符号的英文读法

Frequently-used numerals
1/2 a half , one half , one over two
2/3 two thirds , two over three
1/4 a quarter , one quarter , one fourth , one over four 2+ 1/2 two and a half
0.3 one point three , o point three , point three , nought point three
o.3333333……… point three recurring
5.8676767…….. five point eight six seven , six seven recurring
2/3 two thirds of a meter
常用数学符号英文读法 (资料来源于网络) 2008-11-24 13:56
Fractions 分数
通常将分子读为基数，将分母读为序数。

1/2 = a (or one) half 1/3 = a (or one) third 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
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
Mathematic Forms 数学式(1) Addition 加法
[indent]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. [/indent](2)Subtraction 减法[indent]
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.
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(3)Multiplication 乘法[indent]
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.
[/indent](4)Division 除法[indent]
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.
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Time 时间(1)Hours 钟点[indent]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) at 5 o'c =at five o'clock 五点钟
[/indent](2)Date 日期[indent]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(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[/indent]
符号的英文读法[indent]period 句号≈is approximately equal to 约等于号, comma 逗号
＜is less than 小于号：colon 冒号＞is more than 大于号；semicolon 分号 B ≮is not less than 不小于号！exclamation 惊叹号≯is not more than 不大于号？question mark 问号≤is less than or equal to 小于或等于号≥is more than or equal to 大于或等于号' apostrophe 省略号；所有格符号％per cent 百分之…- dash 破折号
‰per mill 千分之…' ' single quotation marks 单引号∞infinity 无限大号double quotation marks 双引号∝varies as 与…成比例( ) parentheses 圆括号√(square) root 平方根[ ] square brackets 方括号∵since; because 因为《》French quotes 法文引号;书名号∴hence 所以... ellipsis 省略号∷equals, as (proportion) 等于，成比例¨tandem colon 双点号
∠angle 角ditto 双点号⌒semicircle 半圆‖parallel 双线号⊙circle 圆／virgule 斜线号○circumference 圆周＆ampersand = and πpi 圆周率～swung dash 代字号△triangle 三角形§section; division 分节号⊥perpendicular to 垂直于→arrow 箭号；参见号
∪union of 并，合集＋plus 加号；正号∩intersection of 交，通集－minus 减号；负号∫the integral of …的积分±plus or minus 正负号( ∑sigma) summation of 总和×is multiplied by 乘号°degree 度÷is divided by 除号′minute 分＝is equal to 等于号″second 秒≠is not equal to 不等于号
＃number …号≡is equivalent to 全等于号℃Celsius system 摄氏度≌ is equal to or approximately equal to 等于或约等于号＠at 单价[/indent]
幂次方通常用power表示.例如:10的7次方:the seventh power of ten或ten to the seventh power.
任何一个数都可以表示成X乘以10的Y次方,即X times the Yth(或根据情况改为nd, rd) power of ten.
a的平方： a square or a squared a的立方： a cube or b cubed a的4次方： a to the fourth a的-1次方： a to the minus one log a: common logarithm ln a: natural logarithm f(a): the function of a |a|: the absolute value of a sin: sine cos: cosine tan: tangent ctg: cotangent sec: secant csc: cosecant
n!: the factorial of n 公理axiom 定理theorem 计算calculation 运算operation 证明prove 假设hypothesis, hypotheses(pl.)
命题proposition 算术arithmetic 加plus(prep.), add(v.), addition(n.) 被加数augend, summand 加数addend 和sum 减 minus(prep.), subtract(v.), subtraction(n.)
被减数minuend
减数subtrahend 差remainder
乘times(prep.), multiply(v.), multiplication(n.)
被乘数multiplicand, faciend 乘数multiplicator 积product
除 divided by(prep.), divide(v.), division(n.)
被除数dividend 除数divisor 商quotient
等于 equals, is equal to, is equivalent to
大于is greater than 小于is lesser than 大于等于is equal or greater than
小于等于is equal or lesser than
运算符operator 数字digit 数number 自然数natural number 整数integer 小数decimal 小数点decimal point 分数fraction 分子numerator 分母denominator 比ratio 正positive
负negative 零null, zero, nought, nil 十进制decimal system 二进制binary system 十六进制hexadecimal system 权weight, significance 进位carry 截尾truncation 四舍五入round 下舍入round down 上舍入round up 有效数字significant digit 无效数字insignificant digit 代数algebra
公式formula, formulae(pl.) 单项式monomial 多项式polynomial, multinomial 系数coefficient 未知数unknown, x-factor, y-factor, z-factor 等式，方程式equation 一次方程simple equation 二次方程quadratic equation 三次方程cubic equation 四次方程quartic equation 不等式inequation 阶乘factorial 对数logarithm 指数，幂exponent
乘方power 二次方，平方square 三次方，立方cube
四次方the power of four, the fourth power
n次方the power of n, the nth power
开方evolution, extraction
二次方根，平方根square root
三次方根，立方根cube root
四次方根the root of four, the fourth root n次方根the root of n, the nth root 集合aggregate 元素element 空集void 子集subset 交集intersection
并集union 补集complement 映射mapping 函数function 定义域domain, field of definition 值域range 常量constant
变量variable 单调性monotonicity 奇偶性parity 周期性periodicity 图象image 数列，级数series 微积分calculus
微分differential 导数derivative 极限limit 无穷大infinite(a.) infinity(n.) 无穷小infinitesimal 积分integral 定积分definite integral
不定积分indefinite integral 有理数rational number 无理数irrational number 实数real number 虚数imaginary number 复数complex number 矩阵matrix
行列式determinant 几何geometry 点point 线line 面plane 体solid 线段segment
射线radial 平行parallel 相交intersect 角angle 角度degree 弧度radian 锐角acute angle
直角right angle 钝角obtuse angle 平角straight angle 周角perigon 底base 边side 高height
三角形triangle 锐角三角形acute triangle 直角三角形right triangle 直角边leg 斜边hypotenuse 勾股定理Pythagorean theorem 钝角三角形obtuse triangle
不等边三角形scalene triangle 等腰三角形isosceles triangle 等边三角形equilateral triangle 四边形quadrilateral 平行四边形parallelogram 矩形rectangle 长length
宽width 菱形rhomb, rhombus, rhombi(pl.), diamond 正方形square 梯形trapezoid 直角梯形right trapezoid 等腰梯形isosceles trapezoid 五边形pentagon
六边形hexagon 七边形heptagon 八边形octagon 九边形enneagon 十边形decagon 十一边形hendecagon 十二边形dodecagon
多边形polygon 正多边形equilateral polygon 圆circle 圆心centre(BrE), center(AmE) 半径radius 直径diameter 圆周率pi
弧arc 半圆semicircle 扇形sector 环ring 椭圆ellipse 圆周circumference 周长perimeter
面积area 轨迹locus, loca(pl.) 相似similar 全等congruent 四面体tetrahedron 五面体pentahedron 六面体hexahedron
平行六面体parallelepiped 立方体cube 七面体heptahedron 八面体octahedron 九面体enneahedron 十面体decahedron 十一面体hendecahedron
十二面体dodecahedron 二十面体icosahedron 多面体polyhedron 棱锥pyramid 棱柱prism 棱台frustum of a prism 旋转rotation
轴axis 圆锥cone 圆柱cylinder 圆台frustum of a cone 球sphere 半球hemisphere 底面undersurface
表面积surface area 体积volume 空间space 坐标系coordinates 坐标轴x-axis, y-axis, z-axis 横坐标x-coordinate 纵坐标y-coordinate
原点origin 双曲线hyperbola 抛物线parabola 三角trigonometry 正弦sine 余弦cosine 正切tangent
余切cotangent 正割secant 余割cosecant 反正弦arc sine 反余弦arc cosine 反正切arc tangent 反余切arc cotangent
反正割arc secant 反余割arc cosecant 相位phase 周期period 振幅amplitude 内心incentre(BrE), incenter(AmE) 外心excentre(BrE), excenter(AmE)
旁心escentre(BrE), escenter(AmE) 垂心orthocentre(BrE), orthocenter(AmE) 重心barycentre(BrE), barycenter(AmE) 内切圆inscribed circle 外切圆circumcircle 统计statistics 平均数average
加权平均数weighted average
方差variance
标准差root-mean-square deviation, standard deviation
比例propotion 百分比percent 百分点percentage 百分位数percentile
排列permutation 组合combination 概率，或然率probability 分布distribution 正态分布normal distribution 非正态分布abnormal distribution 图表graph
条形统计图bar graph 柱形统计图histogram 折线统计图broken line graph 曲线统计图curve diagram 扇形统计图 pie diagram。