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Spanish 101A

Spanish 101B

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The numbers in Spanish are straightforward with only a few spelling changes to remember.

The numbers from 0-30 are written as one word; from 31-99 they are written as three words separated by "y". For example:

cero diez  veinte
uno once veintiuno
treinta y uno
dos doce veintidós
treinta y dos
tres trece veintitrés
treinta y tres
cuatro catorce veinticuatro
treinta y cuatro
cinco quince veinticinco
treinta y cinco
seis dieciséis veintiséis
treinta y seis
siete diecisiete veintisiete
treinta y siete
ciento uno
ocho dieciocho veintiocho
treinta y ocho
ciento dos.
nueve diecinueve veintinueve
treinta y nueve
ciento tres...

Notice that 16, 22, 23 & 26 require an accent mark.

The single-word numbers ending with one-syllable numbers (dos, tres, seis) need an accent mark.

This is because of the Rules of Pronunciation:

Rule #2 states that words ending in an N, S or vowel have the second to last syllable stressed: HA-blan, BUE-nos, FO-ca. Exceptions to this rule must wear a written accent mark.

Note: the accent mark also reflects the proper pronunciation. For example, it is more logical to say, veintiDOS after veinTIUno, than to change the pronunciation of veinte into *Vein-TI-dos.

Remember that any form of uno drops its "o" when used as an adjective:

Hay veintiún estudiantes. Tengo treinta y un años.