I’m not a native, so I’ve always spoken numbers in English as our textbooks tell us to do: 452 would be “four hundred (and) fifty-two.” But I’ve recently heard natives say something like “four fifty-two” in a couple of movies. (The numbers could be different.)
Is this grammatically correct? Is it common in informal speech? What about formal speech? Can it be used in formal contexts?
Also does this usage depend on the context? Or can you use this system in any setting? I remember at least once (in the movie Get Smart) this style was used to refer to the number of a page (from a report). But I’m sure I’ve heard it in another context too. I just can't remember what.
I couldn't find the answer myself, mostly because I didn't know what to search.
By the way, I’ve been taught US English, but I’d like to know the UK usage too (in case there is any difference here).
Thank you in advance.