posted by Hayley .
The table shows the driving distance from certain cities.
From To Driving Dis(mi)
Pittsburgh Johnstown 55
Johnstown Allentown 184
1. Write a number sentence that compares the mileage from Pittsburgh to Johnstown to Allentown, and the mileage from Allentown to Johnstown to Pittsburgh.
2. Name the property that is illustrated by this sentence.
55+184 = 184+55