Jackie walks 2 miles each day while Jessie walks 1.5 miles each day. How many more miles, in all, does Jackie walk than Jessie walk in 6 days? Think carefully first, then make a decision:
Jackie walks 2 - 1.5 = 0.5 miles more each day than Jessie. So in 6 days, Jakie walks 0.5 x 6 = 3 miles more than Jessie. So, the answer is 3.