Números del 1 al 50 / Numbers from 1 to 50.

0
38
1 one11 eleven21 twenty-one
2 two12 twelve22 twenty-two
3 three13 thirteen23 twenty-three
4 four14 fourteen24 twenty-four
5 five15 fifteen30 thirty
6 six16 sixteen31 thirty-one
7 seven17 seventeen37 thirty-seven
8 eight18 eighteen40 forty
9 nine19 nineteen49 forty-nine
10 ten20 twenty50 fifty

Observemos que a partir del número 21, entre las decenas y las unidades aparece un guión.