"The girl sees one black duck."

Translation: Das Mädchen sieht eine schwarze Ente.

[HairyMezican]

Wouldn't "Das Mädchen sieht eine schwarze Ente" translate to "The girl sees a black duck" and "Das Mädchen sieht eins schwarze Ente" translate to "The girl sees one black duck"?

[Karmen2810]

No, the numbers also need to be changed depending on the gender of the noun they follow/describe

[nrshakya]

Why was "Das Mädchen sieht eine schwarzes Ente." wrong?

[lillejord]

Because Ente is feminine and feminine+accusative is "eine schwarze". Schwarzes would be for neuter+accusative like "ein schwarzes Ei". And, I believe, masculine+accusative would be "einen schwarzen Hund".

[BlaineKerr]

So Ente is in Nominative case here?

[darkhorse13]

Ein eine means One!!!..german is hard :(