1.  Mr. Buffet cleaned 42 of the 50 buses. How many are still to be cleaned? 
  

2.  A truck drove under a bridge 5 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 37 bottles of milk. It delivered 29 bottles. How many bottles are still to be delivered? 
  

4.  Graham has to repair 21 cabs. He has repaired 2. How many more does he have to repair? 
  

5.  Mrs. Allen has 7 gallons of fuel in her car. Her fuel tank has a capacity of 10 gallons. How many gallons are needed to fill the fuel tank? 
  
