1、数学符号面面观：各类运算的英文表达小数、分数、百分数1. 小数表示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：6.86 six point eight six14.15 fourteen point one five345.456 three four five point four five six 或 three hundred and fortyfive point four five six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.
2、08 （nought）point nought eight 或 （zero）point zero eight9.07 nine point o seven2. 百分数表示法百分数中的百分号%读作 percent。如：6% 读作 six percent0.6% 读作 （nought） point six percent500% 读作 five hundred percent3. 倍数表示法倍数表示方法很多，如：This room is four times as big as mine. 这个房间是我房间的四倍。This room is three times larger than that
3、one. 这个房间比那个房间大三倍。The output of coal has doubled. 煤的产量增加了一倍。My aunt is as old again as I am. 我姑姑年龄比我大一倍。Productivity is increased three fold. 生产效率提高了两倍。The volume of the Sun is about 1,300,000 times that of the Earth. 太阳的体积约为地球的 1300000 倍。4. 分数表示法(1) 较小分数的一般读写方法。如：1/3 one-third2/3 two-thirds3/5 thre
4、e-fifths(2) 较复杂分数的简明读写方法。如：22/9 twenty-two over ninea/b a over b 或 a divided by b43/97 forty-three over ninety-seven(3) 整数与分数之间须用 and 连接。如：four and a half nine and two fifths(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：a one-third mile 1/3 英里a three-quarter majority 3/4 的多数加、减、乘、除表示法1加：用 and, plus, added to 等
5、词表示。2 4 6 可译为：Two and four is six.Two plus four is equal to six.Two added to four equals six.Two and four makes six.Two plus four will be six.If you add two to four, you get six.2减：用 minus, taken from, subtracted from 等表示。83=可译为：Eight minus three is five.Eight minus three is equal to five.Three take
6、n from eight leaves five.Three subtracted from eight leaves five.Take three from eight and the remainder is five.3乘：用 multiply.by. / multiplied by / time 等表示。3 5 = 15 可译为：Multiply three by five is (gives)fifteen.Three multiplied by five is fifteen.Multiply three by five, you get fifteen.Three times
7、five is (makes, will be, equals, is equal to) fifteen.4除：用 divide.by. / divided by / divide.into. / into 等表示。24 8 = 3 可译为：Twenty-four divided by eight makes (is, equals) three.Twenty-four divided by eight is equal to three.Eight into twenty-four goes three times.Divide eight into twenty-four, and yo
8、u get three.Divide twenty-four by eight, and you get three.各类运算的读法6+511Six plus five is eleven 或 Six and five is eleven.11-65Eleven minus six is five. 或 Six from eleven is five.4520Four multiplied by five is twenty.或 Four times five is twenty.2045Twenty divided by four is five. 或 Four into twenty go
9、es five.15:53The ratio of fifteen to five is three.3 的平方=9Three squared is nine.2 的立方=8Two cubed is eight.2 的 4 次方=16The fourth power of two is sixteen.X(1/2)=YThe square root of X is Y.X(1/3)=YThe cubic root of X is Y.a ba is more than b.a ba is less than b.a ba approximately equals to b.a ba is not equal to b.
