Question

andrew went hiking near his house. the first trail he hiked on took him 4.5 miles away from his house. the second trail he hiked took him 2.4 miles closer to his house. the third trail took him 1.7 miles further away from his house. after andrew hiked the tree trails, how far from his house was he?

Answer 1

3.8 miles away from his house

it helps if you line up the numbers like so

   4.5
-  2.4
_____
   2.1
+ 1.7

Answer 2

Answer:

After Andrew hiked the three trails, he was 3.8 miles away from his house.

Explanation:

The calculation is the following:

4.5 miles of the first hike minus 2.4 miles of the second hike

4.5-2.4= 2.1

Then you have to add to those 2.1 miles the 1.7 miles of the third and last hike

2.1+1.7= 3.8 miles