Pete and Raymond each receive $2.50 from their grandmother. Pete saves his money and only spends 4 nickels. Raymond spends his money at the arcade games but still has 7 dimes left. How much did Pete and Raymond spent altogether, in cents?
Pete spends 4*5 = <T>multiply(4, 5)=20 cents.
Raymond has 7*10 = <T>multiply(7, 10)=70 cents left.
Raymond spent 250-70 = <T>subtract(250, 70)=180 cents.
Together, Pete and Raymond spent 20+180 = <T>add(20, 180)=200 cents.
