Can you guide me through solving this problem: While on vacation in Bali, Thea bought a hat from a craftsman worth $70. If she gave the craftsman four $20 bills, how much change did she get?
If she gave the craftsman four $20 bills, the total amount of money she gave to the craftsman is 4*$20 = $80.
Since the hat was worth $70, the craftsman gave her change equal to $80-$70=$10