Our hall floor is concrete and has a hump in the middle of it which we need to remove. What would be the best way to do this?

The hump might have been there the entire time and now you wish to address it?

I am guessing that this is the first floor/slab home?To remove it,I would hammer it out,remove the loose materials and put in new concrete to bring it back to level.

In my area we have a slab home built on landfill next to the water that's slowly sliding off towards the sea wall. This left a 2" "speed bump " in the kitchen. To sell the house the owner had to overpour the slab to bring the slab level again. This took care of the bump in the kitchen but now it's kinda like one of those "fun houses" you see in a carnival. As you stand on the slab the rest of the house, the doors, the windows all seem a little slanted.
About the only way to remove your bump would be to repour and level the slab. Good luck, Tom

You could try grinding it down. A belt sander with coarse sandpaper may do the trick.

You really don't give enough to go on to give you the right way to go. If you place a level on it, how large is the hump in reference to, say, 4' out from it? Does the hump start 1' from the peak, 6' from the peak? What type of flooring is it you want to put down over top?

Different floorings have their substrate tolerances. Sometimes it's easier and more cost effective to ramp up to a peak from further out, sometimes it's easier to just grind down the area.

As for cutting out the area and pouring a new section, that can create "cold joints" where you will now have a section of slab that will behave like it's own independent self causing greater problems later. If you have a pretensioned slab, where rebar is pulled under great force before the pour and released after curing and you cut through one of them, you'd make for a bad day for yourself.

I think you would get more appropriate and more accurate advice if you expanded your question.

Is the hump just in the hall and not in any surrounding rooms? I would want to know what is pushing up or what is settling down rather than patching the problem. Tell us more

I have a similar issue. In middle of basement I have a 1/8 to max 3/16 variance with level floor running inline for 12'.
Its about centered in 1100 sqft basement. I think ill grind out and chip with hammer vs floor leveler. Floor leveler is more pot hole type I think. My problem is this bump if u would call it that makes laminate floor have a slight bounce vs opposite ends of room. Need to fix before I go further.

You could try grinding it down. A belt sander with coarse sandpaper may do the trick.

On a concrete floor? You need a concrete surface grinder.