发呆2011
1.one—firsttwo—secondthree—third由于是前三个词，很任性顽皮，长得奇形怪状的，所以需要我们特殊记。2.four到nineteen在后面加th就可以了。但其中five,eight,nine,twelve是不听话的孩子，淘气得很。瞧：five—fiftheight—eighthnine—ninthtwelve—twelfth3.twenty以上的数，整十的将“y”变“ie”再加“th”,其它的两位或多位数只需将个位数变序数词就可以了。瞧：twenty→twentieththirty-one→thirty-first(375)threehundredandseventy-five→threehundredandseventy-fifth序数词在工作时，常常懒惰地缩写成由阿拉伯数字加序数词最后两个字母的形式。瞧：1st,2nd,3rd,20th,43th对了，序数词还有一个特别好的朋友“the”。在句子中，“the”总是站在序数词的前面。瞧：SundayisthefirstdayoftheweekinAmerica.下面有一首小儿歌帮你记忆序数词。基变序，有规律。first,second,third太顽皮。奇形怪状特殊记。4—19加“th”,8,9,5,12小淘气：8没t,9没e,5和12,f替ve。整十将y变ie,再把th加上去。多位数,更有趣,个位变序没问题。Healthistheguaranteeofone'shappiness.Withoutahealthybody,onecannotdowhathewantsto,nottomentionaccomplishinghisgoalsinlife.Onecankeepfitinthreeways.First,heistopayattentiontohygiene.Stayawayfromviruses,whichmeansoneshouldwashhands,takebathsfrequently,eatanddrinkproperly.Stayawayfrombadlifehabits,suchassmokingandoverworking,whichseverelydamagethebodyorgans.Secondly,oneistoexerciseregularly.Hemaygojogging,swimming,bicycling,playingbasketballandsoon.Exerciseswillimproveone'sabilitytoresistdiseases.Andlastbutnotleast,heshouldbeoptimistic,fearingnodifficultiesandobstacles,andalwaysbeinginhighspirits.Onlyingoodhealthaswellasinhighspiritscanwegreetthefuture,whichisfullofcompetitionandchallenges,andstrivetoachieveourambitionsenergetically.
三尺优姬
-100都在这了：1 one2 two3 three4 four5 five6 six7 seven8 eight9 nine10 ten11 eleven12 twelve13 thirteen14 fourteen15 fifteen16 sixteen17 seventeen18 eighteen19 nineteen20 twenty21 twenty-one22 twenty- two23 twenty- three24 twenty- four25 twenty- five26 twenty- six27 twenty- seven28 twenty- eight29 twenty- nine30 thirty31 thirty- one32 thirty- two33 thirty- three34 thirty- four35 thirty- five36 thirty- six37 thirty- seven38 thirty- eight39 thirty- nine40 forty41 forty- one42 forty- two43 forty- three44 forty- four45 forty- five46 forty- six47 forty- seven48 forty- eight49 forty- nine50 fifty51 fifty- one52 fifty- two53 fifty- three54 fifty- four55 fifty- five56 fifty- six57 fifty- seven58 fifty- eight59 fifty- nine60 sixty61 sixty- one62 sixty- two63 sixty- three64 sixty- four65 sixty- five66 sixty- six67 sixty- seven68 sixty- eight69 sixty- nine70 seventy71 seventy- one72 seventy- two73 seventy- three74 seventy- four75 seventy- five76 seventy- six77 seventy- seven78 seventy- eight79 seventy- nine80 eighty81 eighty- one82 eighty- two83 eighty- three84 eighty- four85 eighty- five86 eighty- six87 eighty- seven88 eighty- eight89 eighty- nine90 ninety91 ninety-one92 ninety- two93 ninety- three94 ninety- four95 ninety- five96 ninety- six97 ninety- seven98 ninety- eight99 ninety- nine100 hundred
薄荷点点
1-100都在这了：1 one2 two3 three4 four5 five6 six7 seven8 eight9 nine10 ten11 eleven12 twelve13 thirteen14 fourteen15 fifteen16 sixteen17 seventeen18 eighteen19 nineteen20 twenty21 twenty-one22 twenty- two23 twenty- three24 twenty- four25 twenty- five26 twenty- six27 twenty- seven28 twenty- eight29 twenty- nine30 thirty31 thirty- one32 thirty- two33 thirty- three34 thirty- four35 thirty- five36 thirty- six37 thirty- seven38 thirty- eight39 thirty- nine40 forty41 forty- one42 forty- two43 forty- three44 forty- four45 forty- five46 forty- six47 forty- seven48 forty- eight49 forty- nine50 fifty51 fifty- one52 fifty- two53 fifty- three54 fifty- four55 fifty- five56 fifty- six57 fifty- seven58 fifty- eight59 fifty- nine60 sixty61 sixty- one62 sixty- two63 sixty- three64 sixty- four65 sixty- five66 sixty- six67 sixty- seven68 sixty- eight69 sixty- nine70 seventy71 seventy- one72 seventy- two73 seventy- three74 seventy- four75 seventy- five76 seventy- six77 seventy- seven78 seventy- eight79 seventy- nine80 eighty81 eighty- one82 eighty- two83 eighty- three84 eighty- four85 eighty- five86 eighty- six87 eighty- seven88 eighty- eight89 eighty- nine90 ninety91 ninety-one92 ninety- two93 ninety- three94 ninety- four95 ninety- five96 ninety- six97 ninety- seven98 ninety- eight99 ninety- nine100 hundred
oo888888oo
方法一：一百以内质数口诀
二，三，五，七，一十一;
一三，一九，一十七;
二三，二九，三十七;
三一，四一，四十七;
四三，五三，五十九;
六一，七一，六十七;
七三，八三，八十九;
再加七九，九十七;
25个质数不能少;
百以内质数心中记。
方法二：儿歌记忆法：
2、3、5、7、11 (二、三、五、七 和 十一)
13、17 (十三 后面是十七)
19、23、29 (十九、二三、二十九)
43、47、53 (四三、四七、五十三)
59、61、67 (五九、六一、六十七)
71、73、79 (七一、七三、七十九)
83、89、97 (八三、、九十七
方法三：
我想2 3 5 7 不用记。
我编了故事:质数爬山喝酒记
英语中数词主要分为两种:基数词和序数词。基数词表示数目的多少,序数词则表示顺序。在各地的中考英语试题中,对数词的考查是命题的重点质数(prime number)又称素数，有无限个。一个大于1的自然数，除了1和它本身外，不能被其他自然数整除，换句话说就是该数除了1和它本身以外不再有其他的因数;否则称为合数。
根据算术基本定理，每一个比1大的整数，要么本身是一个质数，要么可以写成一系列质数的乘积;而且如果不考虑这些质数在乘积中的顺序，那么写出来的形式是唯一的。最小的质数是2。
目前为止，人们未找到一个公式可求出所有质数。
2016年1月，发现世界上迄今为止最大的素数，长达2233万位，如果用普通字号将它打印出来长度将超过65公里。
质数个数
质数的个数是无穷的。欧几里得的《几何原本》中有一个经典的证明。它使用了证明常用的方法：反证法。具体证明如下：假设质数只有有限的n个，从小到大依次排列为p1，p2，，pn，设N=p1×p2××pn，那么，N+1是素数或者不是素数。
如果N+1为素数，则N+1要大于p1，p2，，pn，所以它不在那些假设的素数集合中。
如果N+1为合数，因为任何一个合数都可以分解为几个素数的积;而N和N+1的最大公约数是1，所以N+1不可能被p1，p2，，pn整除，所以该合数分解得到的素因数肯定不在假设的素数集合中。
因此无论该数是素数还是合数，都意味着在假设的有限个素数之外还存在着其他素数。所以原先的假设不成立。也就是说，素数有无穷多个。
其他数学家给出了一些不同的证明。欧拉利用黎曼函数证明了全部素数的倒数之和是发散的，恩斯特库默的证明更为简洁，HillelFurstenberg则用拓扑学加以证明。
对于一定范围内的素数数目的计算
尽管整个素数是无穷的，仍然有人会问100，000以下有多少个素数?，一个随机的100位数多大可能是素数?。素数定理可以回答此问题。
非你莫属88
1 one
2 two
3 three
4 four
5 five
6 six
7 seven
8 eight
9 nine
10 ten
11 eleven
12 twelve
13 thirteen
14 fourteen
15 fifteen
16 sixteen
17 seventeen
18 eighteen
19 nineteen
20 twenty
21 twenty-one
22 twenty- two
23 twenty- three
24 twenty- four
25 twenty- five
26 twenty- six
27 twenty- seven
28 twenty- eight
29 twenty- nine
30 thirty
31 thirty- one
32 thirty- two
33 thirty- three
34 thirty- four
35 thirty- five
36 thirty- six
37 thirty- seven
38 thirty- eight
39 thirty- nine
40 forty
41 forty- one
42 forty- two
43 forty- three
44 forty- four
45 forty- five
46 forty- six
47 forty- seven
48 forty- eight
49 forty- nine
50 fifty
51 fifty- one
52 fifty- two
53 fifty- three
54 fifty- four
55 fifty- five
56 fifty- six
57 fifty- seven
58 fifty- eight
59 fifty- nine
60 sixty
61 sixty- one
62 sixty- two
63 sixty- three
64 sixty- four
65 sixty- five
66 sixty- six
67 sixty- seven
68 sixty- eight
69 sixty- nine
70 seventy
71 seventy- one
72 seventy- two
73 seventy- three
74 seventy- four
75 seventy- five
76 seventy- six
77 seventy- seven
78 seventy- eight
79 seventy- nine
80 eighty
81 eighty- one
82 eighty- two
83 eighty- three
84 eighty- four
85 eighty- five
86 eighty- six
87 eighty- seven
88 eighty- eight
89 eighty- nine
90 ninety
91 ninety-one
92 ninety- two
93 ninety- three
94 ninety- four
95 ninety- five
96 ninety- six
97 ninety- seven
98 ninety- eight
99 ninety- nine
100 hundred
例句：
1.Originally released in 1957, the film was remade as "The Magnificent Seven".
这部电影最早在1957年上映，后被翻拍为《七侠荡寇志》。
2.The seven major industrial countries will have their yearly meeting in London.
7个主要工业国家将在伦敦举行一年一度的会议。
3.She denied the murder of four children who were in her care.
她否认杀害了她所照管的4个孩子。
