(四)分数、小数、百分比、倍数、四则运算的表示方法

类别
说明
例词或例句
分数
分子用基数词,分母用序数词,分子大于1,分母的序数词用复数。
1/2 读作 a (one) half
1/3 读作 a (one) third
1/4  读作a (one) quarter或a (one) fourth
4/5  读作four fifths
4 2/3 读作four and two thirds
Two thirds of the earth surface is covered by water.(地球表面的三分之二覆盖着水)
小数
小数点读作point。小数点后面各数都按个位基数词读;小数点前面仍按基数词读。零读作o或zero.
0.7 读作zero point seven
25.25 读作twenty-five point two five
百分比
百分比由基数词+percent组成 ( % )
2% 读作two percent
44%  读作forty-four percent
100%  读作one hundred percent
More than 25 percent of the surface of the ground is covered with grass. 百分之二十五以上的地面被草覆盖着。
倍数
(1)   倍数+as+形(副)原级+as
(2)   倍数+形(副)比较级+than
(3)   倍数+ the size(length , height , width , etc .)+ of (表示大小或数量的名词)
This room is three times as large as that one .
This room is two times larger than that one.
This room is three times the size of that one .
注意:上述三个结构的意义是相同的。
汉译表达:
这间房是那间房的三倍大 。
加、减、乘、除四则运算
用基数词表示
加号用plus / and
减号用minus
乘号用times
除号用divided by
9+8=17, 读作 Nine plus (and) eight is seventeen.
11-5=6 , 读作 Eleven minus five is six.
6×5=30, 读作 Six times five is thirty.
35÷7=5, 读作 Thirty-five divided by seven is five.

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