Hi 
Yes.
It is also good to keep an original in native LibreOffice format as
almost all other office suites and programs use the same format
natively. Even MS office can sometimes read it fairly well nowadays.
However, as Joel said it is good to use
File - "Save As ..."
to save in the older Microsoft format to view on other machines. I
think it's listed as "PowerPoint 98/2000/Xp", something like that.
This is also true if you were using Microsoft Office. Their native
format (.pptX) doesn't work as reliably on other versions of their own
program. The older format (.ppt) seems to be able to be read most
widely by the largest variety of machines and programs.
You can edit Microsoft formats with Libreoffice but they tend to add
funny bits of unnecessary coding so it's better to edit your original
.Odp file and then only use the "Save As" option when you really need
to use the file on another machine.
One of these days people will stop relying on the variable and
inconsistent MS formats that changes with each release of their
products and move to something more reliable that is developed and
agreed by a committee of software producers rather than by a single
profit-making organisation. Until then we just have to muddle along.
Regards from
Tom 