CARDINAL NUMBERS

1 one
2 two
3 three
4 four
5 five
6 six
7 seven
8 eight
9 nine
10 ten
11 eleven
12 twelve
13 thirteen
14 fourteen
15 fifteen
16 sixteen
17 seventeen
18 eighteen
19 nineteen
20 twenty
21 twenty-one


30 thirty
40 forty
50 fifty
60 sixty
70 seventy
80 eighty
90 ninety
100 one / a hundred

203 two hundred and three
331 three hundred and thirty-one

1,000 one / a thousand

2,500 two thousand five hundred
4,612 four thousand six hundred and twelve
5,015 five thousand and fifteen.

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(En inglés se pone coma para indicar el mil. En español ponemos un punto.)