The train to Boston traveled at an average speed of 50 miles per hour for 5 hours. The train to Hartford traveled at an average speed of 48 miles per hour for 4 hours. 

Which method explains how to calculate the difference in the distances the two trains traveled?



 
A.
Step 1 Divide: 50 ÷ 5. 
Step 2 Divide: 48 ÷ 4 . 
Step 3 Add the two quotients.


 
B.
Step 1 Multiply: 50 × 5. 
Step 2 Multiply: 48 × 4. 
Step 3 Subtract the two products.


 
C.
Step 1 Multiply: 50 × 5. 
Step 2 Multiply: 48 × 4. 
Step 3 Add the two products.


 
D.
Step 1 Divide: 50 ÷ 5. 
Step 2 Divide: 48 ÷ 4. 
Step 3 Subtract the two quotients.