1. Mr. Allen  cleaned 68 of the 71 cabs. How many are still to be cleaned?   2. A truck drove under a bridge 4 m high. There was a gap of 1 m between the top of the truck and the bridge. How many meters was the truck in height?   3. A milk van started with 13 bottles of milk. It delivered 11 bottles. How many bottles are still to be delivered?   4. John  has to repair 54 buses. He has repaired 4. How many more does he have to repair?   5. Mrs. Hick has 8 gallons of fuel in her car. Her fuel tank has a capacity of 17 gallons. How many gallons are needed to fill the fuel tank?