Randy has $30. He spent $10 buying his lunch. He spent a quarter of the money he had left on an ice cream cone. What is the amount of money, in dollars, Randy has left?
Randy has 30-10=<T>subtract(30, 10)=20 dollars left after buying lunch.
Randy spent 20/4=<T>divide(20, 4)=5.0 dollars on the ice cream cone.
Randy has 20-5=<T>subtract(20, 5)=15 dollars left.
