0から100までの数字と序数の英語（one、two、threeとfirst、second、third）

英語で 1、2、3 は one、two、three というが、1 番目、2 番目、3 番目は first、second、third という。それぞれファースト、セカンド、サードという発音するが、これは野球でよく使われている用語である。

「～番目」を序数といい、3のような数と明確に区別する。

ルール

1、2、3 以外の数は th をつける

5 は fifth にする
8 は eighth にする
9 は ninth にする
12 は twelfth にする

ty」で終わる数は「tieth」にする
y を ie にする

一覧

数	数（英語）	序数
0	zero
1	one	first
2	two	second
3	three	third
4	four	fourth
5	five	fifth
6	six	sixth
7	seven	seventh
8	eight	eighth
9	nine	ninth
10	ten	tenth
11	eleven	eleventh
12	twelve	twelfth
13	thirteen	thirteenth
14	fourteen	fourteenth
15	fifteen	fifteenth
16	sixteen	sixteenth
17	seventeen	seventeenth
18	eighteen	eighteenth
19	nineteen	nineteenth
20	twenty	twentieth
21	twenty one	twenty-first
22	twenty two	twenty-second
23	twenty three	twenty-third
24	twenty four	twenty-fourth
25	twenty five	twenty-fifth
26	twenty six	twenty-sixth
27	twenty seven	twenty-seventh
28	twenty eight	twenty-eighth
29	twenty nine	twenty-ninth
30	thirty	thirtieth
31	thirty one	thirty-first
32	thirty two	thirty-second
33	thirty three	thirty-third
34	thirty four	thirty-fourth
35	thirty five	thirty-fifth
36	thirty six	thirty-sixth
37	thirty seven	thirty-seventh
38	thirty eight	thirty-eighth
39	thirty nine	thirty-ninth
40	forty	fortieth
41	forty one	forty-first
42	forty two	forty-second
43	forty three	forty-third
44	forty four	forty-fourth
45	forty five	forty-fifth
46	forty six	forty-sixth
47	forty seven	forty-seventh
48	forty eight	forty-eighth
49	forty nine	forty-ninth
50	fifty	fiftieth
51	fifty one	fifty-first
52	fifty two	fifty-second
53	fifty three	fifty-third
54	fifty four	fifty-fourth
55	fifty five	fifty-fifth
56	fifty six	fifty-sixth
57	fifty seven	fifty-seventh
58	fifty eight	fifty-eighth
59	fifty nine	fifty-ninth
60	sixty	sixtieth
61	sixty one	sixty-first
62	sixty two	sixty-second
63	sixty three	sixty-third
64	sixty four	sixty-fourth
65	sixty five	sixty-fifth
66	sixty six	sixty-sixth
67	sixty seven	sixty-seventh
68	sixty eight	sixty-eighth
69	sixty nine	sixty-ninth
70	seventy	seventieth
71	seventy one	seventy-first
72	seventy two	seventy-second
73	seventy three	seventy-third
74	seventy four	seventy-fourth
75	seventy five	seventy-fifth
76	seventy six	seventy-sixth
77	seventy seven	seventy-seventh
78	seventy eight	seventy-eighth
79	seventy nine	seventy-ninth
80	eighty	eightieth
81	eighty one	eighty-first
82	eighty two	eighty-second
83	eighty three	eighty-third
84	eighty four	eighty-fourth
85	eighty five	eighty-fifth
86	eighty six	eighty-sixth
87	eighty seven	eighty-seventh
88	eighty eight	eighty-eighth
89	eighty nine	eighty-ninth
90	ninety	ninetieth
91	ninety one	ninety-first
92	ninety two	ninety-second
93	ninety three	ninety-third
94	ninety four	ninety-fourth
95	ninety five	ninety-fifth
96	ninety six	ninety-sixth
97	ninety seven	ninety-seventh
98	ninety eight	ninety-eighth
99	ninety nine	ninety-ninth
100	one hundred	one hundredth
101	one hundred one	one hundred and first
102	one hundred two	one hundred and second
103	one hundred three	one hundred and third

例文

I am a third-year student.
私は三年生だ。

This is the fifth chapter.
これは第五章だ。

one-fourth
四分の一

three-fourth
四分の三

分数は「分子」「分母」の順番で、分子は数、分母は序数を使う。また分子と分母の間にハイフンを入れる。

メモ

100には0がいくつありますか？
How many zeroes are there in one hundred.

how many で使うとき、zero は複数形の zeroes になる。