another/more

Teo1. We need another three chairs.

2. We need three more chairs.

What's the difference between the above two sentences?

They mean the same thing to me.

If I wanted to help someone who said either sentence, I'd start looking for three additional chairs.

Although I prefer the 2nd, the 1st is also in current usage:
http://tinyurl.com/gte26

The problem I have with "another three chairs" is that this could lead to the impression that the current number of (existing) chairs is also three, which isn't always th

3. I'm staying for another few weeks.

4. I'm staying for a few more weeks.

What's the difference between the above two sentences?

The first one suggests you have not been there for longer than just a few weeks.
The second is free of any connotation as to how long have you been there.

As MArius said, using 'another' suggests you need to match what you have already got/had.

5. It's been translated into 27 languages, with another 53 in the works. (by Pamela Osment)

6. It's been translated into 27 languages, with 53 more in the works. (Stephen Teo)

What's the difference between the above two sentences?

both mean one has already been translated, and 53 is being translated now.

In my humble opinion, using the English language is like painting pictures. You have two excellent artists painting the same scene using same tools and paints but what is created by one and the other can be different. It might be due to the difference in perception or other unintelligible factors but what came out can be and usually are two different interpretations of the same scene.

Usi