4км 312м -745м=

To subtract the two distances, you need to ensure they're in the same unit of measurement. So first, we need to convert 4 км 312 м to meters, and then we can subtract 745 meters from it.

4 км is equivalent to 4,000 meters (since 1 км = 1,000 м). Adding 312 м to this, you have a total of 4,000 м + 312 м = 4,312 м.

Now we can subtract 745 м from this value:

4,312 м - 745 м = 3,567 м.

If you need the result to be in kilometers and meters, you would now convert 3,567 м back into kilometers:

3,567 м is the same as 3 км 567 м, since 1 км = 1,000 м.

So, 4 км 312 м - 745 м = 3 км 567 м.