How to run tile on a concrete slab when walls on edge plate and move. About 1 inch height difference.?

If your floor is uneven and this is in an area like a garage or basement or shop, then this was what I did.... I painted the entire floor the same color that you would like your grout to be. Take 1/4 inch or 1/8 inch masking tape and mark off your tiles, so you would measure 10 inch tiles or 12 inch tiles and run the tape the whole length of the room until you have the shape of your tiles outlined in this masking tape. Make sure you press it on the floor so the next layer of paint doesn't leak through. Then pick a paint that would be the same color as you want the tile to be. Paint right over the masking tape and the whole floor. I have used a white paint with a touch of black and it makes it look like marble tile. When it is totally dry you can put a clear coat on it and this gives it some depth. Then carefully remove your masking tape - it comes off quite easily, but don't wait wait days and days. Your now have eg. dark grey under your masking tape and the rest of the floor is white/black marble. Just a hint, I use Tremclad paint and it doesn't rub or flake off and seems to last forever! Good luck!