Leta's motor home gets only 9 miles on each gallon of gas. How many gallons of gas will the motor home use on a trip that is 135 miles long?

Question

i tried solve this problem I said to divide. Did I do it correctly?

 

135/9= 15

Answer 1

Yes you did good Job. It is important however to show units as units should tell you if you are on the right track and if your answer makes Sense. See below:

 

No of Gallons used = 135 miles / (9 miles/Gallon) =

15 miles x ( Gallon/mile) = 15 gallons.

 

Note that the miles units cancels out and you are left with Gallons. Since you have the answer in Gallons then it makes Sense because that is what you are looking for. If you do that every time and match your units, then you will have no doubt about your answer in a future problem.