mathhelp
posted by dev .
The person in the word problem wants to run a total of 1000 miles in a year and within a 2 month process she ran a total of 231.05 miles, so now they are asking how many more miles she has to run in the year to reach her goal of 1000 miles. So I think I should subtract 231.05 miles from 1000 miles.

I would do that, also.

This sounds dumb but do I take
1000231.05 or 231.05 1000
If I do it on a calculator I get 768.95, if I set it up with 231.05 on top and the 1000 on the bottom I get 221.05. Something doesn't seem right. 
put this in the Google search window
1000231.05 
In case you've not used the google calculator, the 1000 goes on top and the 231.05 goes on the bottom BECAUSE you have 1000 miles total and you have already run 231.05 so 1000  231.05 is what you have left to run.
If I do this on my calculator, I get
1000231.05 = 768.95
If I subtract 231.051000 I get 768.95 so you must have punched the wrong numbers when you did it. In the second example I have done, the negative sign tells you that you DON'T have negative miles to run. Right?