1. Số thứ tự tiếng Anh từ 1 đến 100
1 – 10
1 (one) → 1st (first)
2 (two) → 2nd (second)
3 (three) → 3rd (third)
4 (four) → 4th (fourth)
5 (five) → 5th (fifth)
6 (six) → 6th (sixth)
7 (seven) → 7th (seventh)
8 (eight) → 8th (eighth)
9 (nine) → 9th (ninth)
10 (ten) → 10th (tenth)
11 – 20
11 (eleven) → 11th (eleventh)
12 (twelve) → 12th (twelfth)
13 (thirteen) → 13th (thirteenth)
14 (fourteen) → 14th (fourteenth)
15 (fifteen) → 15th (fifteenth)
16 (sixteen) → 16th (sixteenth)
17 (seventeen) → 17th (seventeenth)
18 (eighteen) → 18th (eighteenth)
19 (nineteen) → 19th (nineteenth)
20 (twenty) → 20th (twentieth)
21 – 30
21 (twenty-one) → 21st (twenty-first)
22 (twenty-two) → 22nd (twenty-second)
23 (twenty-three) → 23rd (twenty-third)
24 (twenty-four) → 24th (twenty-fourth)
25 (twenty-five) → 25th (twenty-fifth)
26 (twenty-six) → 26th (twenty-sixth)
27 (twenty-seven) → 27th (twenty-seventh)
28 (twenty-eight) → 28th (twenty-eighth)
29 (twenty-nine) → 29th (twenty-ninth)
30 (thirty) → 30th (thirtieth)
31 – 40
31 (thirty-one) → 31st (thirty-first)
32 (thirty-two) → 32nd (thirty-second)
33 (thirty-three) → 33rd (thirty-third)
34 (thirty-four) → 34th (thirty-fourth)
35 (thirty-five) → 35th (thirty-fifth)
36 (thirty-six) → 36th (thirty-sixth)
37 (thirty-seven) → 37th (thirty-seventh)
38 (thirty-eight) → 38th (thirty-eighth)
39 (thirty-nine) → 39th (thirty-ninth)
40 (forty) → 40th (fourtieth)
41 – 50
41 (forty-one) → 41st (forty-first)
42 (forty-two) → 42nd (forty-second)
43 (forty-three) → 43rd (forty-third)
44 (forty-four) → 44th (forty-fourth)
45 (forty-five) → 45th (forty-fifth)
46 (forty-six) → 46th (forty-sixth)
47 (forty-seven) → 47th (forty-seventh)
48 (forty-eight) → 48th (forty-eighth)
49 (forty-nine) → 49th (forty-ninth)
50 (fifty) → 50th (fiftieth)
51 – 60
51 (fifty-one) → 51st (fifty-first)
52 (fifty-two) → 51nd (fifty-second)
53 (fifty-three) → 53rd (fifty-third)
54 (fifty-four) → 54th (fifty-fourth)
55 (fifty-five) → 55th (fifty-fifth)
56 (fifty-six) → 56th (fifty-sixth)
57 (fifty-seven) → 57th (fifty-seventh)
58 (fifty-eight) → 58th (fifty-eighth)
59 (fifty-nine) → 59th (fifty-ninth)
60 (sixty) → 60th (sixtieth)
61 – 70
61 (sixty-one) → 61st (sixty-first)
62 (sixty-two) → 61nd (sixty-second)
63 (sixty-three) → 63rd (sixty-third)
64 (sixty-four) → 64th (sixty-fourth)
65 (sixty-five) → 65th (sixty-fifth)
66 (sixty-six) → 66th (sixty-sixth)
67 (sixty-seven) → 67th (sixty-seventh)
68 (sixty-eight) → 68th (sixty-eighth)
69 (sixty-nine) → 69th (sixty-ninth)
70 (seventy) → 70th (seventieth)
71 – 80
71 (seventy-one) → 71st (seventy-first)
72 (seventy-two) → 72nd (seventy-second)
73 (seventy-three) → 73rd (seventy-third)
74 (seventy-four) → 74th (seventy-fourth)
75 (seventy-five) → 75th (seventy-fifth)
76 (seventy-six) → 76th (seventy-sixth)
77 (seventy-seven) → 77th (seventy-seventh)
78 (seventy-eight) → 78th (seventy-eighth)
79 (seventy-nine) → 79th (seventy-ninth)
80 (eighty) → 80th (eightieth)
81 – 90
81 (eighty-one) → 81st (eighty-first)
82 (eighty-two) → 82nd (eighty-second)
83 (eighty-three) → 83rd (eighty-third)
84 (eighty-four) → 84th (eighty-fourth)
85 (eighty-five) → 85th (eighty-fifth)
86 (eighty-six) → 86th (eighty-sixth)
87 (eighty-seven) → 87th (eighty-seventh)
88 (eighty-eight) → 88th (eighty-eighth)
89 (eighty-nine) → 89th (eighty-ninth)
90 (ninety) → 90th (ninetieth)
91 – 100
91 (ninety-one) → 91st (ninety-first)
92 (ninety-two) → 92nd (ninety-second)
93 (ninety-three) → 93rd (ninety-third)
94 (ninety-four) → 94th (ninety-fourth)
95 (ninety-five) → 95th (ninety-fifth)
96 (ninety-six) → 96th (ninety-sixth)
97 (ninety-seven) → 97th (ninety-seventh)
98 (ninety-eight) → 98th (ninety-eighth)
99 (ninety-nine) → 99th (ninety-ninth)
100 (one hundred) → 100th (one hundredth)
2. Sử dụng số thứ tự khi nào?
– Số thứ tự dùng để nói về vị trí của một vật nào đó hoặc xác định vị trí của vật đó trong một dãy.
– Danh hiệu của vua, hoàng hậu nước ngoài thường
+ Viết tên và số thứ tự bằng số La Mã
+ Đọc thì thêm THE trước số thứ tự.
Ví dụ
+ Charles II – Đọc: Charles the Second
+ Edward VI – Đọc: Edward the Sixth
+ Henry VIII – Đọc: Henry the Eighth
3. Cách chuyển số đếm sang số thứ tự
3.1. Thêm th đằng sau số đếm. Số tận cùng bằng Y, phải đổi Y thành I rồi mới thêm th
Ví dụ:
– four -> fourth
– eleven -> eleventh
– twenty–>twentieth
Ngoại lệ:
– one – first
– two – second
– three – third
– five – fifth
– eight – eighth
– nine – ninth
– twelve – twelfth
3.2. Khi số kết hợp nhiều hàng, chỉ cần thêm th ở số cuối cùng
Nếu số cuối cùng nằm trong danh sách ngoài lệ trên thì dùng theo danh sách đó
Ví dụ:
– 5,111th = five thousand, one hundred and eleventh
– 421st = four hundred and twenty-first
3.3. Khi muốn viết số ra chữ số
Viết như số đếm nhưng đằng sau cùng thêm TH hoặc ST với số thứ tự 1, ND với số thứ tự 2, RD với số thứ tự 3)
Ví dụ:
– first = 1st
– second = 2nd
– third = 3rd
– fourth = 4th
– twenty-sixth = 26th
– hundred and first = 101st
