英文公式讀法

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1、分?jǐn)?shù)中分子用基數(shù)詞表示，分母用序數(shù)詞表示。先讀分子，后讀分母。當(dāng)分子大于1時，分母要加“s”。?1/2讀作：onehalf?1/3讀作：onethird?1/4讀作：onefourth?2/3讀作：twothirds?1/5/9讀作：oneoverfiveninths比較復(fù)雜的分?jǐn)?shù)常常用over這個詞表示。如：317/509讀作：threehundredandseventeenoverfivehundredandnine?1/10one-tenth?1/100onepercent?1/1000o

2、ne-thousandth?1/10000oneten-thousandth?21/2twoandonehalf；?42/3fourandtwo-thirds?0.46%pointfoursixpercent含小數(shù)點(diǎn)的數(shù)字，小數(shù)點(diǎn)“.”讀“point”，小數(shù)點(diǎn)后的數(shù)若是兩位以上，則分別讀出。?0.5讀作：pointfive?0.25讀作：pointtwofive?0.125讀作；pointonetwofive?93.64m讀作：ninety-threepointsixfourmeters?2’1

3、5.11’’讀作：twominutesfifteenpointoneoneseconds∵since;because因?yàn)椤鄅ence;so所以?sigma∞infinity無限大號∝variesas與…成比例m??integralof?fromntom；np?qpimpliesqx+1xplusonex-1xminusonex±1xplusorminusonexyxy(xtimesy)x/yxovery(xdividedbyy)x=5xequalsto5x≠5xnotequalsto5x?yxa

4、pproximatelyequalsyx≡yxisequivalenttoyx>yxisgreaterthanyx≥yxisgreaterthanorequaltoyx

5、x

6、modxx??xapproachesinfinityx∈AxbelongstoAx?Axd

7、oesnotbelongtoAA?BAiscontainedinBA?BAcontainsBA∩BAintersectionBA∪BAunionBx2xsquaredx3xcubedx4xtothepower4xnxtothepowernx?nxtothe(power)minusnXrootx3xcuberoot(of)x4xfourthroot(of)xnxnthroot(of)x(x+y)2xplusyallsquared(x/y)2xoveryallsquaredn!nfactorialX

8、?xhatXxbarX%xtildeXixi或xsubin?athesumfromiequalsonetonaiii?1f(x)fx/thefunctionfofxf'(x)fprimexf''(x)fdouble-primexf'''(x)ftriple-primexf(n)(x)fnth-primex?f?fprime,subcc?a?afirst,prime1?a2??asecond,secondprime?z?firstderivativeofz??z?secondderivativeo

9、fzdz?firstderivativeofzwithrespecttoxdx?y?f?x?yisafunctionofx?f/?x1partialderivativeoffwithrespecttox1?2f/?2xthesecondpartialderivativeoffwith1respecttox1limx→0thelimitasxapproacheszerolimx→0+thelimitasxapproacheszerofromabovelimx→0-thelimitasxapproa

10、cheszerofrombelowlogeylogytothebaseeln(y)naturallogyndf?nthderivativeoffwithrespecttoxndx??fxdx()anindefiniteintegralofthefunctionfxb??f(x)dxintegralofthefunctionffromatobax?eexponentialfunctiontothebaseeofx?logxlogxtothebaseaa?lgxcommomlogarithmofx?