Quick answer
"Fifties" is a plural noun which is often translated as "los años cincuenta", and "forties" is a plural noun which is often translated as "los años cuarenta". Learn more about the difference between "fifties" and "forties" below.
fifties
A plural noun indicates that there is more than one person, place, thing, or idea.
plural noun
1. (decade)
a. los años cincuenta
(m) means that a noun is masculine. Spanish nouns have a gender, which is either feminine (like la mujer or la luna) or masculine (like el hombre or el sol).
What important events happened during the fifties?¿Cuáles eventos importantes tuvieron lugar durante los años cincuenta?
2. (approximate age)
a. cincuenta y pico
A word or phrase that is commonly used in conversational speech (e.g. skinny, grandma).
(colloquial)
My dad is in his fifties, but he looks younger. Mi papá tiene cincuenta y pico, pero se ve más joven.
b. cincuenta y tantos
A word or phrase that is commonly used in conversational speech (e.g. skinny, grandma).
(colloquial)
How old is your Spanish teacher? - I think she's in her fifties.¿Qué edad tiene tu profesora de español? - Creo que tiene cincuenta y tantos.
fifty
An adjective is a word that describes a noun (e.g. the big dog).
3. (number)
a. cincuenta
There are fifty houses in our neighborhood.Hay cincuenta casas en nuestro vecindario.
A noun is a word referring to a person, animal, place, thing, feeling or idea (e.g. man, dog, house).
4. (number)
a. el cincuenta
(m) means that a noun is masculine. Spanish nouns have a gender, which is either feminine (like la mujer or la luna) or masculine (like el hombre or el sol).
Ten times five is fifty.Diez veces cinco son cincuenta.
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forties
A plural noun indicates that there is more than one person, place, thing, or idea.
plural noun
1. (decade)
a. los años cuarenta
(m) means that a noun is masculine. Spanish nouns have a gender, which is either feminine (like la mujer or la luna) or masculine (like el hombre or el sol).
World War II ended in the forties, right?La Segunda Guerra Mundial terminó en los años cuarenta, ¿no?
2. (approximate age)
a. cuarenta y pico (colloquial)
How old do you think Mrs. Smith is? - I think she's in her forties. ¿Cuántos años le calculas a la Sra. Smith? - Creo que tiene cuarenta y pico.
forty
An adjective is a word that describes a noun (e.g. the big dog).
3. (number)
a. cuarenta
Bring a box with forty slots, or two boxes with twenty slots each.Trae una caja con cuarenta ranuras o dos cajas con veinte ranuras cada una.
A noun is a word referring to a person, animal, place, thing, feeling or idea (e.g. man, dog, house).
4. (number)
a. el cuarenta
(m) means that a noun is masculine. Spanish nouns have a gender, which is either feminine (like la mujer or la luna) or masculine (like el hombre or el sol).
La raíz cuadrada de mil seiscientos es cuarenta.The square root of sixteen hundred is forty.
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