the distance from baltimore to new york is about 171 mi. this is about 189 mi less than the distance from baltimore to boston. How far is baltimore from boston if you stop in new york along the way?
First you have to figure that it sounds confusing but. What you have to do is that 171 is 189 LESS than from one place to another. So just do : 189-171= 18. And then you know 18.
