1. A car is traveling at 325 miles per hour. After 2 hours, it slows down to 240 miles per hour. How much did the car's speed decrease in those 2 hours?

2. A bakery had 875 cupcakes in stock. They sold 432 cupcakes on Monday and 267 cupcakes on Tuesday. How many cupcakes are left in the bakery's stock?

3. A football team gained 567 yards in the first quarter and then lost 189 yards in the second quarter. How many yards did the team gain or lose in total after the first two quarters?

4. A water tank initially contained 825 liters of water. After 3 hours, 267 liters of water were used. How much water is left in the tank?

5. A student had 689 marbles in his collection. He gave away 345 marbles to his friends. How many marbles does he have left?