What Is The Maximum Number That Can Be Moved If You Can Only Move Two Matches?

ANSWER 1:

The highest number that can be formed is 511108.

You remove the 2 horizontal sticks on the zero and make it a 1 between them.

Also if you want to see it upside down the maximum number would be 811105.

ANSWER 2:

Or the 2nd possible answer is shown in the picture below;