1. Mr. Martin drove 28 miles in his new car on Monday and 10 miles on Thursday.  How many miles did he drive in these two days?   2. There are 6 buses and 2 cars in a parking lot. How many vehicles are there in the parking lot?   3. There are 44 men and 26 women in an aeroplane. How many passengers are there altogether?   4. Steve is a mechanic. He repaired 34 trucks and 31 vans last month. How many vehicles did he repair altogether?   5. Mrs. Douglas used 4 gallons of fuel last week. She used 3 gallons this week. How many gallons of fuel were consumed in the two weeks?