1-12: one, two, three, four, five, six, seven, eight, nine, ten, eleven, twelve

13-19: thirteen, fourteen, fifteen, sixteen, seventeen, eighteen, nineteen

Round tens: twenty, thirty, forty, fifty, sixty, seventy, eighty, ninety

Hundred, thousand, million, billion hundred, thousand, million, billion

Basic usage of ordinal words

Writing method

Summary of exact numbers: cardinal words hundred/thousand/million/billion/dozen

Summary without exact numbers: hundreds/thousand/million/billion/dozen s/es

Example

Fraction

Percent expression: cardinal word percent

When using fractions or percentages to modify nouns, you need to add of before the nouns.

Use once for twice, double/twice for twice, and times for three times and more.

Sentence expressions of multiples: seven times seven times, five times five times

Approximate age: in one`s plural form of ten Example: in my twenties I am about twenty years old

Specific age expression: cardinal number (years old) or at the age of cardinal number

Note: The cardinal numeral -year (without adding s) -old indicates how old you are. It can be used as an adjective and is often used as an attributive to modify countable nouns.

table date

Table century, year

the ordinal noun

Noun (first letter is capitalized) Cardinal number (first letter is capitalized)

Example