## Algebra 1

a) Tulsa to Dallas is 258 miles. Dallas to Houston is 239 miles. To find the total distance from Tulsa to Houston, we add the two distances to get $258+239=497$. b) Houston to Dallas is 239 miles. Dallas to Tulsa is 258 miles. To find the total distance from Houston to Tulsa, we add the two distances to get $239+258=497$. c) We notice that in these first two parts, $258+239=239+258$. This is called the commutative property because we can change the order of the two terms being added together without changing the sum.