He had two-hundred dollars.
He lived for one-hundred years.
I have never put a hyphen before hundred in situations like those, but according to this (unsure of its reliability, however), it says:
. . . one-hundred dollars is hyphenated because one-hundred is a compound adjective standing before dollars . . .
From the example since "xxx-hundred" is modifying something (dollars/years), making it an adjective, should I therefore put a hyphen in between?