In Adobe Reader or Acrobat, with the document open click on Window > New Window
The document will open a second time in a new window. Now move to the page you want and rearrange the two windows on your screen to show whichever combination of pages you want.
This is really useful for looking at a figure while reading text, or checking a reference list while looking at text.
In acrobat, save the pdf as a png format
File > Save as > Image > png
This will save every page as a separate png file labelled with the file name and then page 1, 2 etc
In your word document, go to Insert > Picture
Then navigate to where you put the png files and select all of them at once by holding the shift button as you click on the first and last one in the list with the left mouse button
Click on insert and all the images will be put in at once.