If you do not have Adobe Acrobat DC installed you can still edit PDF files with Word. If you just want to view PDF files your should have Acrobat Reader already installed.
1, Using File Manager (Yellow Folder Icon) point to the PDF file and right click. Fig 1 (1)
2. Click on Open With (2)
3. Click on Choose another App (3)
4. Fig 2. Scroll down to Word and select it and Click OK. If you Click ALWAYS USE THIS APP it will open PDF files in the future with Word. You will have to remember to repeat this to change back to Adobe Acrobat DC when you get it installed.
5. This will then open Word and a message will say that it will take a moment or two to convert the file. Click OK.
Fig 1.
Fig. 2