考向07分数
（2022·辽宁营口·中考真题）TomwasangrybecauseJerryate________ofhisnineapples
secretly.Nowhehadonlythreeleft.
A．aquarterB．onethirdC．ahalfD．twothirds
【答案】D
【解析】句意：汤姆很生气，因为杰里偷偷地吃了他九个苹果中的三分之二。现在他只
剩下三个了。
考查数词运算。aquarter四分之一；onethird三分之一；ahalf二分之一；twothirds三
分之二。根据“hisnineapples”及“onlythreeleft”可知，总共9个苹果，还剩3个，也就
是吃了6个，占总数的三分之二，故选D。
分数的用法概览
分数的表达法
分数是由基数词作分子，序数词作分母构成的。除了分子是＂1＂的情况外，序数词
都要用复数。
?1/3onethird7/9sevenninths
【注意】一些特殊的分数表达法：
?ahalf二分之一aquarteronefourth四分之一threequartersthreefourth
四分之三
【助记口诀】
英语分数巧记
英语分数不费事，＂母序子基＂四个字。
分子若是大于一，分母还须加-s。
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基础练
1．________ofthestudentstookpartinthesportsmeeting.
A．ThreefiveB．ThreefifthC．ThirdfifthsD．Threefifths
2．Thereare________teachersinourschool,and________ofthemarewomenteachers.
A．twohundreds;threequarterB．twohundreds;threequarters
C．twohundred;threequartersD．twohundred;threequarter
3．Inourclass________ofthestudentsareboys.
A．thirdfiveB．threefifthsC．threefifth
4．________ofthepeopleinthatcitysaytheyhaveseenUFOs.
A．Three-fifthB．Three-fifthsC．Third-fiveD．Thirds-five
5．Itsaysthat________ofthewateraroundtheworld________polluted.
A．twothird;hasB．twothirds;haveC．twothird;areD．twothirds;is
6．ThepopulationofChinaisabout1.4billion.That’salmostone________oftheworld’s
population.
A．fiveB．thefiveC．fifthD．thefifth
7．About________oftheearth________coveredwithwater,butwehavelessandlessfresh
wateravailable.
A．Threefourth;isB．threefourths;isC．threefourt