1. Mr. Douglascleaned 15 of the 34 buses. How many are still to be cleaned?   2. It is possible to accommodate 168 cars in a parking lot. If 95 cars are already parked, how many more cars can fit?   3. A milk van started with 550 bottles of milk. It delivered 92 bottles. How many bottles are still to be delivered?   4. Herbert has to repair 30 cabs. He has repaired 13. How many more does he have to repair?   5. There are 226 passengers in a train. If93 people get off at the station, how many passengers are still there in the train?