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1. The Numbers 0–100
(Los números del 0 al 100)

2. The Numbers 0–100
1 uno
dos
cero
0
2
tres
3
cuatro
4
5 cinco
7 siete
ocho
seis
6
8
nueve
9
diez
10
11 once
doce
12
trece
13
catorce
14
15 quince

3. dieciséis
The Numbers 0–100
17
diez y seis
16
18
19
veinte
20
diez y siete
diez y ocho
diez y nueve
diecisiete
dieciocho
diecinueve
The numbers from 16 to 19 (and
from 21 to 29) are normally
written as one word.
Formerly, these numbers could be
written as three words, and may be
encountered in this format in older
publications:
When written as one word, dieciséis
must bear a written accent as shown.

4. veintidós
veintitrés
The Numbers 0–100
22
(veinte y uno)
21
23
24
(veinte y cinco)
25
(veinte y dos)
(veinte y tres)
(veinte y cuatro)
veintiuno
veinticuatro
veinticinco
veintiséis
27
(veinte y seis)
26
28
29
treinta
30
(veinte y siete)
(veinte y ocho)
(veinte y nueve)
veintisiete
veintiocho
veintinueve
Veintidós, veintitrés, and veintiséis must
also bear a written accent as shown.

5. The Numbers 0–100
32
treinta y uno
31
cuarenta
40
treinta y dos
¿treintiuno?
etc.
cuarenta y uno
41
etc.
We do not condense
the numbers to one
word after 30.

6. The Multiples of Ten
20
diez
10
30
40
cincuenta
50
veinte
treinta
cuarenta
70
sesenta
60
80
90
cien
100
setenta
ochenta
noventa
(Los múltiplos de diez)

7. Cien and ciento
100
101
cien
ciento uno
cien = 100 even
110 ciento diez
ciento quince, etc.
115
cien → ciento
with any number
over 100 even
Notice that “y” (and) is
not used between the
hundreds’ and tens’
places.

8. Uno, un and una
The counting number uno becomes un before a
masculine singular noun . . .
un libro → one book
un profesor → one professor (male)
. . . and una before a feminine singular noun.
una mesa → one table
una profesora → one professor (female)
In compound numbers, -uno becomes -ún before a
masculine noun and -una before a feminine noun.
veintiún libros twenty-one books
veintiuna profesoras → twenty-one professors
→

9. FIN