Số
Số đếm
Số thứ tự
Viết tắt số thứ tự
1
One
First
st
2
Two
Second
nd
3
Three
Third
rd
4
Four
Fourth
th
5
Five
Fifth
th
6
Six
Sixth
th
7
Seven
Seventh
th
8
Eight
Eighth
th
9
Nine
Ninth
th
10
Ten
Tenth
th
11
Eleven
Eleventh
th
12
Twelve
Twelfth
th
13
Thirteen
Thirteenth
th
14
Fourteen
Fourteenth
th
15
Fifteen
Fifteenth
th
16
Sixteen
Sixteenth
th
17
Seventeen
Seventeenth
th
18
Eighteen
Eighteenth
th
19
Nineteen
Nineteenth
th
20
Twenty
Twentieth
th
21
Twenty-one
Twenty-first
st
30
Thirty
Thirtieth
th
31
Thirty-one
Thirty-first
st
40
Forty
Fortieth
th
50
Fifty
Fiftieth
th
60
Sixty
Sixtieth
th
70
Seventy
Seventieth
th
80
Eighty
Eightieth
th
90
Ninety
Ninetieth
th
100
One hundred
One hundredth
th
1000
One thousand
One thousandth
th
1 triệu
One million
One millionth
th
1 tỷ
One billion
One billionth
th