英语奥数词汇

TheplussignisusedinadditionandtheminusisusedinsubtractionHissonislearningtomultiplyanddividesquare正方形circle圆形triangle三角形line线Parallelogram平行四边形rectangle长方形加用plusand或add表示等于用ismakeequal等词表示23可表示为Howmuchistwoplusthree235TwoplusthreeisfiveTwoandthreeisequaltofiveTwoandthreemakesfiveTwoaddedtothreeequalsfiveIfweaddtwotoandthreewegetfive减用minus或takefrom表示106Howmuchistenminussix1064TenminussixisfourTakesixfromtenandtheremainderisfourSixtakenfromtenisfour十减去六等于四乘用time动词或multiply表示3X4Howmuchisthreetimesfour3X412ThreetimesfourisaretwelveMultiplythreebyfourwegettwelveThreemultipliedbyfourmakestwelve三乘以四等于十二除用divide的过去分词形式表示164Howmuchissixteendividedbyfour1644SixteendividedbyfourisfourSixteendividedbyfourequalsgivesmakesfour十六除以四等于四英语分数的表示法httpzhidaobaiducomsearchword基数词ampfrqbsearchexpampieutf8httpzhidaobaiducomsearchword序数词ampfrqbsearchexpampieutf8一用基数词序数词表示httpzhidaobaiducomsearchword基数词ampfrqbsearchexpampieutf8httpzhidaobaiducomsearchword序数词ampfrqbsearchexpampieutf8httpzhidaobaiducomsearchword基数词ampfrqbsearchexpampieutf8httpzhidaobaiducomsearchword序数词ampfrqbsearchexpampieutf8分数在英语中通常是借助于基数词和序数词来共同表达的其中基数词表示分子序httpzhidaobaiducomsearchword序数词ampfrqbsearchexpampieutf8数词表示分母如1Thecentimeterisonetenthofthedecimeteroronehundredthofthemeter厘米是分米的十分之一或者说是米的百分之一httpzhidaobaiducomsearchwordthe20girlampfrqbsearchexpampieutf82Howeverthenumberofboyswillbeathirdorlessthanthegirlsintheclass但是班里男生的人数将比女生少三分之一或更少从以上例子可以看出分子除用one外也可用a如果分子大于1分母要用复数形式但是12不能说aonesecond而要说aonehalf例如3Thesumofonehalfonethirdandonefourthofacertainnumberis13某数的1213和14的和是1314和34可以说aonefourth和threefourths但常用aquarter和threehttpzhidaobaiducomsearchword不可数名词ampfrqbsearchexpampieutf8quarters表示应该注意的是分数修饰名词时若该名词是不可数名词只能用单数若是可数名词用单数或复数均可但是若它们在句子中作主语则谓语动词是用单数还是复数取决于名词即与分数所修饰的名词保持一致例如4Onlyonefifthofairconsistsofoxygen氧气只占空气的155Abouttwothirdsofthestudentsattendthemeeting大约23的学生都参加了会议httpzhidaobaiducomsearchword带分数ampfrqbsearchexpampieutf8httpzhidaobaiducomsearchword数词ampfrqbsearchexpampieutf8httpzhidaobaiducomsearchword带分数ampfrqbsearchexpampieutf8带分数也是常见的英语数词表达所谓带分数实际上是整数分数表达时分httpzhidaobaiducomsearchword带分数ampfrqbsearchexpampieutf8而述之只是整数部分与分数部分要用连词and连接当带分数修饰名词时该名词通常是复数但若名词置于整数one或a之后则用单数带分数名词作主语时谓语httpzhidaobaiducomsearchword词根ampfrqbsearchexpampieutf8动词根据临近原则要用复数例如httpzhidaobaiducomsearchword25小时ampfrqbsearchexpampieutf86Youshouldfinishtheworkwithinoneandafourthhours你应在125小时内完成工作7Theatombreaksupinaminuteandaquarter原子在125分钟内裂变二用percent等表示表示百分之一可以说oneahundredth但更常用onepercent或percent即httpzhidaobaiducomsearchword百分数ampfrqbsearchexpampieutf8用百分数表示法来表达例如8Ourbodiesare65percentwater我们人体含65水分9Seventyfivepercentoftheearthssurfaceiscoveredbywater地球表面的75被水覆盖着10EightyfivepercentofthestudentsinEnglishdepartmentaregirls英语系85的学生是女生三用part表示名词part有分之一的意思分子大于1时part用复数表示分数的结构一般有以下三种httpzhidaobaiducomsearchword数词ampfrqbsearchexpampieutf8httpzhidaobaiducomsearchword数词ampfrqbsearchexpampieutf81基数词或a序数词partsahundredpart百分之一2基数词partsin基数词fivepartsinonethousand千分之五3基数词partsper基数词onepartpermillion百万分之一四用基数词介词基数词表示借助介词表示分数介词前的数词是分子介词后的数词是分母例如11NinetyninepeopleoutofahundrediftheywereaskedwhofirstfoundAmericawouldanswerClumbus如果要问是谁首先发现美洲一百个人中有九十九httpzhidaobaiducomsearchword哥伦布ampfrqbsearchexpampieutf8个百分之九十九将回答是哥伦布这种结构中的介词主要有inoutofof以及to12Themapisdrawntoascaleofoneoftenthousand这张地图是按万分之一的比例绘制的1Abe倍数as计量形容词原级asBThistreeisthreetimesastallasthatone这棵树是那棵树的三倍高Hisfatheristwiceasoldashe他父亲的年纪有他两倍大httpzhidaobaiducomsearchword比较级ampfrqbsearchexpampieutf82Abe倍数计量形容词比较级thanBTheYangtzeRiverisalmosttwicelongerthanthePearlRiver长江差不多比珠江长两倍Thedictionaryisexactlyfivetimesmoreexpensivethanthatone这本字典比那本恰好贵5倍3Abe倍数the计量名词ofBThenewlybroadenedsquareidfourtimesthesizeofthepreviousone新扩建的广场是未扩建时的四倍大4The计量名词ofAbe倍数thatofBThesizeofthenewlybroadenedsquareisfourtimesthatofthepreviousone新扩建的广场为以前的四倍大5其它Imtwicedoublehisage我的年龄是他的两倍Ivepaidfivetimestheusualpriceforthestamp我出了5倍于往常的价格买这枚邮票Theaverageincomeofthestaffhasbeenincreasedby50percentcomparedwithlastyear与去年相比该单位职工的收入增加了50ThepriceofTVsaretwofoldadj两部分的双重的downovertheseyears近几年来电视机的价格下降了两倍点point线line面plane体solid线段segment射线radialhttpzhidaobaiducomsearchword平行20parallelampfrqbsearchexpampieutf8平行parallel相交intersect角angle角度degree弧度radian锐角acuteangle直角rightangle钝角obtuseanglehttpzhidaobaiducomsearchword平角ampfrqbsearchexpampieutf8平角straightanglehttpzhidaobaiducomsearchword周角ampfrqbsearchexpampieutf8周角perigon底base边side高height三角形trianglehttpzhidaobaiducomsearchword锐角三角形ampfrqbsearchexpampieutf8锐角三角形acutetriangle直角三角形righttriangle直角边leg斜边hypotenusehttpzhidaobaiducomsearchword勾股定理ampfrqbsearchexpampieutf8勾股定理Pythagoreantheoremhttpzhidaobaiducomsearchword钝角三角形ampfrqbsearchexpampieutf8钝角三角形obtusetrianglehttpzhidaobaiducomsearchword不等边三角形ampfrqbsearchexpampieutf8不等边三角形scalenetriangle等腰三角形isoscelestriangle等边三角形equilateraltriangle四边形quadrilateral平行四边形parallelogram矩形rectangle长length宽width菱形rhombrhombusrhombipldiamond正方形square梯形trapezoidhttpzhidaobaiducomsearchword直角梯形ampfrqbsearchexpampieutf8直角梯形righttrapezoidhttpzhidaobaiducomsearchword等腰梯形ampfrqbsearchexpampieutf8等腰梯形isoscelestrapezo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