1. Mr. Smith  cleaned 57 of the 63 buses. How many are still to be cleaned?   2. A truck drove under a bridge 8 m high. There was a gap of 3 m between the top of the truck and the bridge. How many meters was the truck in height?   3. A milk van started with 39 bottles of milk. It delivered 36 bottles. How many bottles are still to be delivered?   4. Darren  has to repair 91 vans. He has repaired 5. How many more does he have to repair?   5. Mrs. Anderson has 3 gallons of fuel in her car. Her fuel tank has a capacity of 7 gallons. How many gallons are needed to fill the fuel tank?