I could just start from scratch & make my own .blend file to complete it?
That won’t do you any good. These are just rounding errors. There is a limitation to the precision of numbers in computers.
Strange things can happen, for instance:
open Blender and start moving the default Cube with G, X in one direction and keep moving it. Watch the X-Location. At a certain point (when it is long out of view), the sign will change; the Cube has jumped from -226,73m to 204.502m (numbers are fictional, just an example, the exact values depend on how far you are zoomed in or out)….
But these things won’t influence the result of your exercise.
