LESSON FIVE: The Numbers

1 UNO 2 DOS 3 TRES 4 CUATRO 5 CINCO 6 SEIS

7 SIETE 8 OCHO 9 NUEVE 10 DIEZ 11 ONCE 12 DOCE

13 TRECE 14 CATORCE 15 QUINCE 16 DIECISEIS

17 DIECISIETE 18 DIECIOCHO 19 DIECINUEVE 20 VEINTE

21 VEINTIUNO 22 VEINTIDOS

After veinte, all the numbers will be made adding 1,2,3... (veintiuno, veintidos, veintitres etc.)

30 TREINTA 40 CUARENTA 50 CINCUENTA 60 SESENTA

70 SETENTA 80 OCHENTA 90 NOVENTA

After 30 numbers are written in 3 words, but formed exactly the same:

VEINTICUATRO (24) VEINTICINCO (25) TREINTA Y UNO (31) TREINTA Y SIETE

(37) CUARENTA Y OCHO (48) CINCUENTA Y NUEVE (59) NOVENTA Y TRES (93)

Now let´s see the hundreds, they also follow a pattern so they will be easy to form.

100 CIEN (when the number goes alone) 100 CIENTO... (when another number follows)

101 CIENTO UNO 104 CIENTO CUATRO 113 CIENTO TRECE 146 CIENTO

CUARENTA Y SEIS 175 CIENTO SETENTA Y CINCO 100 CIEN 139 CIENTO

TREINTA Y NUEVE 198 CIENTO NOVENTA Y OCHO 200 DOSCIENTOS 300

TRESCIENTOS 400 CUATROCIENTOS 500 QUINIENTOS 600 SEISCIENTOS

700 SETECIENTOS 800 OCHOCIENTOS 900 NOVECIENTOS

1000 MIL 2000 DOS MIL 3000 TRES MIL 4000 CUATRO MIL...

The thousands are totally regular, but remember they don´t have plural: 200 DOSCIENTOS IS CORRECT. 2000: DOS MILES IS WRONG (Dos mil is right) 1,000,000 UN MILLóN (remember LL is read like in John or James) 2,000,000 DOS MILLONES 3,000,000 TRES MILLONES...

EXAMPLES (EJEMPLOS)

45.007 CUARENTA Y CINCO MIL SIETE

322.515 TRESCIENTOS VEINTIDOS MIL QUINIENTOS QUINCE

One last thing. The European billion is the equivalent to one million of millions, have it in mind when you translate an ammount of money from English.
This is all there is to know about numbers. Notice when the numbers go separate or together.