Description: Students will practice using key words/information to write a let statement and set up a one-step equation to solve the first word problem. They will then practice using key words to find a cost difference in the next problem. In the third problem, they will review changing a percent to a decimal and find the sales tax of the item cost found in the first problem. A key is provided with the activity. This short activity would make a great classroom warm-up or quick partner task.