1. uno
2. dos
3. tres
4. cuatro
5. cinco
6. seis
7. siete
8. ocho
9. nueve
10. diez
The number "one" changes from "uno" to "un" before a masculine noun.
un libro = one book
un perro = one dog (male)
un hombre = one man
The number "one" changes from "uno" to "una" before a feminine noun.
una pluma = one pen
una gata = one cat (female)
una chica = one girl
When counting generically (one, two, three ...) use "uno" but when counting specifically (one cat, one dog), use "un" or "una."
un libro = one book
una pluma = one pen
uno, dos, tres = one, two, three
Here are the numbers 11-20:
11. once
12. doce
13. trece
14. catorce
15. quince
16. dieciséis
17. diecisiete
18. dieciocho
19. diecinueve
20. veinte
Here are the numbers 21-30:
21. veintiuno
22. veintidós
23. veintitrés
24. veinticuatro
25. veinticinco
26. veintiséis
27. veintisiete
28. veintiocho
29. veintinueve
30. treinta
The next step is to learn to count by 10s all the way to 100:
10. diez
20. veinte
30. treinta
40. cuarenta
50. cincuenta
60. sesenta
70. setenta
80. ochenta
90. noventa
100. cien
Now, see how easy it is to fill in the gaps:
31. treinta y uno
32. treinta y dos
33. treinta y tres
34. treinta y cuatro
35. treinta y cinco
36. treinta y seis
37. treinta y siete
38. treinta y ocho
39. treinta y nueve
40. cuarenta
41. cuarenta y uno
42. cuarenta y dosetc.
This pattern continues all the way to 100:
53. cincuenta y tres
54. cincuenta y cuatro
65. sesenta y cinco
66. sesenta y seis
78. setenta y ocho
88. ochenta y ocho
99. noventa y nueve etc.
From 101-199, use "ciento":
ciento unociento
dosciento
tresciento
sesenta y unociento sesenta y dos etc.
Notice that "y" is used only in numbers 31-99 (and 131-199, 231-299, 331-399, etc.) and it is not used to separate hundreds from tens.
Correct: ciento ochenta y nueve
Incorrect: ciento y ochenta y nueve
To get to 1000, all of the rules you have learned so far continue to apply. All you need to do now is learn to count by 100s all the way to 1000, and that is quite easy:
100. cien
200. doscientos
300. trescientos
400. cuatrocientos
500. quinientos
600. seiscientos
700. setecientos
800. ochocientos
900. novecientos
1000. mil
Here are some more examples:
142. ciento cuarenta y dos
375. trescientos setenta y cinco
612. seiscientos doce
907. novecientos siete
999. novecientos noventa y nueve
Remember from an earlier lesson, there is a masculine and a feminine form for the number one:
un libro = one book
una pluma = one pen
This is also true for the numbers 200, 300, 400, etc.
doscientos libros doscientas plumas
cuatrocientos señores cuatrocientas señoras
When there is exactly 100 of something, and the number is used with the noun, use the shortened form "cien."
cien dólarescien gatascien perroscien pesetas
Finally, in Spanish a period is used to indicate thousands, and a comma is used as a decimal point.
English1,543.67
Spanish1.543,67
