"Eles estão dormindo em uma cama grande."

Translation: They are sleeping on a big bed.

[Chunga668]

"Em Uma" should be contracted to "Numa".
Eles estão dormindo numa cama grande.

[acydneon]

I came here to leave the exact same comment.

[surfx2015]

[2.12.15] exatamente o que eu respondi: "eles estão dormindo numa cama grande", not accepted...

[solidgitarius]

Numa is an informal contraction.

[ghostofthefuture]

Why is "em" not counted as a typo? Is "en" another Portuguese word? I think Duo is programmed to think I don't know the rest of the words in the sentence, when I actually do, and then brings this lesson up again earlier than it should. Getting very frustrated with Portuguese, and I'm almost at the end of the tree.

[Danmoller]

Perhaps they thought "en" would be too "French/Spanish/Italian" and wished to reinforce that "em" is different in Portuguese.

These acceptances of typos are automatic by the system.

[Fekkezaum]

In Portuguese the correct spelling is "em", not "en".