Solve the problem.
Eric and Jack are going to ride their bikes 20 miles. Eric has ridden 12 miles, and Jack has ridden 15 miles. How many more miles does Jack need to ride?
Blank Space__________ miles
To find how many more miles Jack needs to ride, we subtract the number of miles he has already ridden from the total distance they plan to ride.
20 miles - 15 miles = 5 miles.
Therefore, Jack needs to ride 5 more miles.