Actually the left-to-right direction means inceasing values, but not necessaruily positive: -1 is to the right of -2 not because -1 is (t's not), but rather because -1 is greater than -2.

OK - this is true for subtracting positive numbers, not negative.

You lost me there. Why would an "observer" on -5 conclude that subtraction means moving to the right? That woud be true if subtracting a negative number, but not if subtracting a positive number. Are you limiting this discussion to subtracting negative numbers?

Huh? I'm not following you at all.

OK.

Sorry - I have no idea what you're trying to say, and in fact the rest of your post is unintelligible.