Following are a Spanish list of numbers from 1 to 100 and you can see how to form them in Spanish language.
Until 30, ordinal numbers are written in one word
0
cero
1
uno * (could be uno and una)
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
dieciséis
17
diecisiete
18
dieciocho
19
diecinueve
20
veinte
21
veintiuno * (veintuno and veintiuna)
22
veintidós
23
veintitrés
24
veinticuatro
25
veinticinco
26
veintiséis
27
veintisiete
28
veintiocho
29
veintinueve
30
treinta
After 30, ordinal numbers are written in separte words:
tens + y + number
31
treinta y uno
32
treinta y dos
...
40
cuarenta
50
cincuenta
60
sesenta
70
setenta
80
ochenta
90
noventa
100
cien
Be carefull with the following numbers in Spanish
5
cinco
15
quince
50
cincuenta
Spanish ordinal numbers, except uno and veintiuno, do not vary.
uno
Uno varies according to the gender of the following noun.
Uno looses the ending before a masculine noun in singular. Example: Un coche / Una casa
veintiuno
Veintiuno also varies according to the gender of the following noun.
Veintiuno looses the ending before a masculine noun and an accent (´) is added. Example: Veintiún coches.
