A third-grade class spends several weeks learning how to solve story problems (e.g., a girl buys three candy bars for 66 cents apiece. she gives the clerk five dollars. how much change should she receive?) that involve addition, subtraction, multiplication, and division. a week after the last lesson the teacher tests the class by giving them several story problems to solve that involve different situations but require use of one or more of the four arithmetic processes. this is an example of