The way to edit word,excel .powerpoint file when you no have Microsoft office on your computer.

by access into ONEDRIVER or GOOGLE DRIVER you can open your word,excel,powerpoint directly on internet and then edit them very easily.it mean that when you still no have Microsoft Office software in your computer,this method will help you a temporary solution for simply edit your document as you want.
https://docs.google.com/presentation/
https://onedrive.live.com/