英语中基数_序数_分数_小数读法

分数
表示分数时，分子要用基数词，分母用序数词。

如果分子大于1，分母必须用复数形式：
1／3→a（one）third
2／3→two thirds
1／4→a（one）quarter（或fourth）
3／7→three sevenths
1／2→应读作a（one）half
＊比较复杂的分数如：24／789，多读作twenty four over seven hundred and eighty nine。

小数
六又二分之一six and a half
八又2/3 eight and two thirds
表示小数时，小数点前面的基数词和前面讲的基数词的读法相同；小数点后的数字则必须一一读出：0．0089→（zero ／naught）point zero zero eight nine
1．36→one point three six
百分数
百分数由percent表示，百分号％读作percent，应用时常与by连用。

0．68％→zero point six eight percent
6％→six percent
369％→three hundred and sixty nine percent
The output of steel went up by 20 percent．钢产量增长20％。

The price of cotton was reduced by 20 percent．棉花的价格下降了20％。

The loss of water has been reduced to less than 30 percent．水的损耗减少到30％以下。

英语中基数词,序数词,分数,小数和百分数的读法
百分数的读法
1.基数词的读法:
A. 先说"几十", 再说"几",中间用连字符.如:
23— twenty-three 89— eighty-nine
B. 先说"几百", 再加and, 再加末两位数(或末位数).如:
223—two hundred and twenty-three
416—four hundred and sixteen
809—eight hundred and nine
C. 1000以上的数先从后向前数,每三位数加一","(千分位);第一个","号前为thousand; 第二个","号前为million; 第三个","号前为billion.如:
1,001—one thousand and one
4,000—four thousand
9,743—nine thousand, seven hundred and forty-three
174,301—a (one) hundred and seventy-four thousand, three hundred and one
750,000,000—
C. 1000以上的数先从后向前数,每三位数加一","(千分位);第一个","号前为thousand; 第二个","号前为million; 第三个","号前为billion.如:
1,001—one thousand and one
4,000—four thousand
9,743—nine thousand, seven hundred and forty-three
174,301—a (one) hundred and seventy-four thousand, three hundred and one
750,000,000— seven hundred and fifty million
2.序数词的读法
序数词一般以与之相应的基数词加词尾-th构成,如:tenth(第十),但下面这些基数词在变序数词时, 有特别的地方.如:
A. one — first two — second
three— third five— fifth
eight — eighth nine— ninth
twelve — twelfth
B. 以-ty结尾的词,要先变-y为-i,再加-eth.如:
twenty— twentieth forty—fortieth
C. 以one, two, three, five, nine收尾的多位数词,要照第一条方法变.如:
twenty-one —twenty-first
twenty-two — twenty-second
thirty-five — thirty-fifth
ninety-nine—ninety
a hundred and fifty-three —a hundred and fifty-third。