Peter is buying a set of glasses. They cost $3 for small glasses and $5 for large ones. He has $50.  If he buys 8 small ones and leaves with $1 in change, how many large ones did he buy?
He spent $49 on glasses because 50-49=<T>subtract(50, 49)=1
He spent $24 on small glasses because 8x3=<T>multiply(8, 3)=24
He spent $25 on large glasses because 49-24=<T>subtract(49, 24)=25
He bought 5 large glasses because 25/5=<T>divide(25, 5)=5.0
