How can I avoid using the new Pages

For now I have chosen to forgo using the latest versions of Pages & Numbers and prefer thier predecessors. However the newer versions are opened by default when downloading/clicking on DOC & XLS as well as .PAGES & .NUMBERS files. I know how to use the "Open With" command but I'd rather avoid those extra steps. Can I either re-name or hide/move the new versions of these programs so they won't launch inadvertantly. I suppose I could delete them altogether and reacquire them later on. (Eventually I'll come around to using them but not now.)

Best advice?

Thank you.