¡Sí es verdad! Fifteen hundred = 1,500 Eleven hundred = 1,100 Twenty two hundred = 2,200 And so forth . . . ¡Que tengas un buen dia!

It can be either. Fifteen hundred without the s or one thousand five hundred is the same it depends on what you find easier to say.

If you are counting money ($100 bill), so "15 hundreds" . Secondly, when referring to centuries. The 1500's, referring to the years in Anno Domini. Not sure of the film's context, but 2 examples. 1500 is fifteen hundred.

It’s interchangeable. In Australia we use them both equally.

That's like "fifteen, O, O", this is so common when it comes to years.