1. Mr. Jacksoncleaned 24 of the 43 buses. How many are still to be cleaned?   2. It is possible to accommodate 161 cars in a parking lot. If 90 cars are already parked, how many more cars can fit?   3. A milk van started with 490 bottles of milk. It delivered 51 bottles. How many bottles are still to be delivered?   4. Robin has to repair 38 cabs. He has repaired 20. How many more does he have to repair?   5. There are 215 passengers in a train. If50 people get off at the station, how many passengers are still there in the train?