Numbers 1–100

CEFR A1 · Lesson 3 of 11

Numbers come up constantly — prices, ages, phone numbers, addresses. They follow a clear pattern once you know the first twenty.

Numbers come up constantly — prices, ages, phone numbers, addresses. Spanish numbers follow a clear pattern once you know the first twenty.

0–20

0 cero	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 dieciséis	17 diecisiete	18 dieciocho	19 diecinueve

The tens (20–100)

20 veinte	30 treinta	40 cuarenta	50 cincuenta
60 sesenta	70 setenta	80 ochenta	90 noventa
100 cien (100 exactly) / ciento (100 + something, e.g. ciento uno = 101)

Building numbers 21–99

21–29 are written as one word: veintiuno, veintidós, veintitrés… veintinueve.
31 and up use tens + y + unit, as three separate words: treinta y uno, cuarenta y dos, sesenta y siete.
Uno shortens to un before a masculine noun, and becomes una before a feminine one: un libro, una mesa, but veintiuno alone.

Tengo veintiún años.I am twenty-one years old.

Hay treinta y cinco estudiantes.There are thirty-five students.

Son las cien.There are a hundred of them.

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Quick trick: once you know 16–19 (dieci-) and 21–29 (veinti-) as one-word patterns, everything from 31 to 99 is simply "[tens] y [unit]" — no new vocabulary to learn.

Numbers 1–100

Building numbers 21–99

Check your understanding

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