NUMBERS

1. The numbers in English

1.1. Cardinal numbers

Cardinal numbers say how many people or things there are.

Examples:

  • There are five books on the desk.
  • Ron is ten years old.

1.1.1. Numbers bigger than 20

Use a hyphen between compound numbers.

NumberWord
21twentyone
55fiftyfive
99ninetynine

1.1.2. Numbers bigger than 100

Use a hyphen between compound numbers and the word and.

Use either the definite article a or one for 100.

NumberWord
121a/one hundred and twentyone
356three hundred and fiftysix
999nine hundred and ninetynine

1.1.3.Numbers bigger than 1,000

Use a hyphen between compound numbers and the word and.

Use either the definite article a or one for 1,000.

Separate three digits with a comma (,) → 50,000.

NumberWord
1,121a/one thousand one hundred and twentyone
2,356two thousand three hundred and fiftysix
9,999nine thousand nine hundred and ninetynine

1.1.4. The number 0

There are different words for the number 0.

WordExplanationExample
ohsingle digits (telephone numbers, codes)67890
six – seven – eight – nine – oh
zeromeasurements (temperature)-5 °C
five degrees Celsius below zero
noughtfigure 0 in British English*5 – 5 = 0
Five minus five leaves nought.
nilresults in sportThe match ended 2 – 0.
The match ended two – nil.
lovetennis40 – 0
forty – love

* In American English zero is used.

1.1.5. Year

see: The date and the year in English

1.2. Ordinal numbers

Add th to the cardinal number to form the ordinal number: six → sixth

Add the last two letters of the written word to the figure. → 4th

Numbers in words: The ordinal numbers 1st → first, 2nd → second and 3rd → third are irregular. Be careful with the spelling of the words for 5th, 8th, 9th, 12th and the words ending in -y.

Cardinal numbersOrdinal numbers
1one1stfirst
2two2ndsecond
3three3rdthird
5five5thfifth
8eight8theighth
9nine9thninth
12twelve12thtwelfth
20twenty20thtwentieth
Ordinal numbers
21sttwenty-first
22ndtwenty-second
23rdtwenty-third
24thtwenty-fourth
25thtwenty-fifth
26thtwenty-sixth
27thtwenty-seventh
28thtwenty-eighth
29thtwenty-ninth
30ththirtieth
31stthirty-first

1.3. Fractions and decimals

1.3.1. Fractions

Use the ordinal number for the denominator:

  • 1/3 → one third
  • 2 3/5 → two and three fifths

Exceptions:

  • 1/2 → one half
  • 1/4 → one quarter

1.3.2. Decimals

Use the cardinal number for decimals:

  • 3.8 → three point eight
  • 4.25 → four point two five

1.4. Roman numbers

Roman numbers are seldom used. They are used for the names of kings and queens. Use the ordinal number:

  • Elisabeth II → Elisabeth the Second
  • Louis XIV → Louis the Fourteenth

2. The numbers in a table

Cardinal numbersOrdinal numbers
0oh, zero, nil, love, nought
1one1stfirst
2two2ndsecond
3three3rdthird
4four4thfourth
5five5thfifth
6six6thsixth
7seven7thseventh
8eight8theighth
9nine9thninth
10ten10thtenth
11eleven11theleventh
12twelve12thtwelfth
13thirteen13ththirteenth
14fourteen14thfourteenth
15fifteen15thfifteenth
16sixteen16thsixteenth
17seventeen17thseventeenth
18eighteen18theighteenth
19nineteen19thnineteenth
20twenty20thtwentieth
21twenty-one21sttwenty-first
22twenty-two22ndtwenty-second
23twenty-three23rdtwenty-third
24twenty-four24thtwenty-fourth
25twenty-five25thtwenty-fifth
26twenty-six26thtwenty-sixth
27twenty-seven27thtwenty-seventh
28twenty-eight28thtwenty-eighth
29twenty-nine29thtwenty-ninth
30thirty30ththirtieth
31thirty-one31stthirty-first
40forty  
50fifty  
60sixty  
70seventy  
80eighty  
90ninety  
100a/one hundred  
1,000a/one thousand  
10,000ten thousand  
100,000a/one hundred thousand  
1,000,000a/one million  
1,000,000,000a/one billion  

Author: admindz

Leave a Reply

Your email address will not be published. Required fields are marked *