Wij kiezen de tiende kamer.

Both wij and we mean we.

• we is the unstressed, more common form in everyday speech.
• wij is the stressed or fuller form.

So Wij kiezen de tiende kamer and We kiezen de tiende kamer can both mean the same thing. Using wij can sound a bit more emphatic, careful, or contrastive.

Kiezen is in the present tense.

Dutch uses the present tense for both:

• we choose
• we are choosing

So Wij kiezen de tiende kamer can mean either one, depending on context.

If Dutch really wants to emphasize the ongoing action, it can also say:

• Wij zijn de tiende kamer aan het kiezen = We are choosing the tenth room

But the simple present is very normal.

For wij/we, the present-tense verb form is usually the same as the infinitive.

For kiezen:

• ik kies = I choose
• jij kiest = you choose
• hij/zij kiest = he/she chooses
• wij kiezen = we choose
• jullie kiezen = you all choose
• zij kiezen = they choose

So wij kiezen is exactly what you should expect.

Because kamer is a de-word in Dutch.

Dutch nouns usually take either:

• de
• het

You simply have to learn which article belongs to each noun.
Kamer is common gender, so it takes de:

• de kamer = the room

That is why the sentence says de tiende kamer.

Tiende means tenth.

It is the ordinal number from tien = ten.

So:

• tien = ten
• tiende = tenth

In the sentence, de tiende kamer means the tenth room.

Dutch ordinal numbers are not always formed in one perfectly regular way.

For tien the correct ordinal is:

• tiende = tenth

Some common ordinals are:

• eerste = first
• tweede = second
• derde = third
• vierde = fourth
• vijfde = fifth
• zesde = sixth
• zevende = seventh
• achtste = eighth
• negende = ninth
• tiende = tenth

So tiende is just the correct standard form you need to learn.

Because it is placed before a noun as an attributive ordinal.

In Dutch, adjectives and ordinals used before a noun usually take -e:

• de grote kamer = the big room
• de tiende kamer = the tenth room

So the -e on tiende is normal here.

Yes, in this sentence the basic word order is very similar to English:

• Wij = subject
• kiezen = verb
• de tiende kamer = object

So it follows a straightforward subject–verb–object pattern:

• Wij kiezen de tiende kamer.
• We choose the tenth room.

This makes the sentence relatively easy for an English speaker.

Literally, it means the tenth room in a sequence.

That could match room number ten in some contexts, but not always.

Dutch often uses:

• kamer tien = room ten
• kamer nummer tien = room number ten

By contrast:

• de tiende kamer emphasizes order: the first room, second room, third room, and so on

So this sentence most literally means We choose the tenth room.

A rough English-friendly guide is:

• wij ≈ vye or why with a soft v
• kiezen ≈ KEE-zuhn
• de ≈ duh
• tiende ≈ TEEN-duh
• kamer ≈ KAH-mur

A few helpful notes:

• w in Dutch is usually softer than English w, closer to an English v
• ie sounds like ee in see
• ij in wij is often pronounced somewhat like eye

This is only approximate, but it is a useful starting point.

Yes, absolutely.

That is probably the more common everyday version.

• Wij kiezen de tiende kamer = a bit fuller or more emphatic
• We kiezen de tiende kamer = very natural everyday Dutch

Both are correct.