Tyler has 21 CDs. He gives away a third of his CDs to his friend. Then he goes to the music store and buys 8 brand new CDs. How many CDs does Tyler have now?
Tyler gives away 21 / 3 = <T>divide(21, 3)=7.0 CDs
After giving away a third of his CDs, Tyler has 21 - 7 = <T>subtract(21, 7)=14 CDs
After buying new CDs, Tyler has 14 + 8 = <T>add(14, 8)=22 CDs
