1. Mr. Gates drove 3 miles in his new car on Friday and 12 miles on Sunday.  How many miles did he drive in these two days?   2. There are 3 trucks and 7 buses in a parking lot. How many vehicles are there in the parking lot?   3. There are 49 men and 35 women in an aeroplane. How many passengers are there altogether?   4. Michael is a mechanic. He repaired 20 cabs and 11 vans last month. How many vehicles did he repair altogether?   5. Mrs. Hick used 5 gallons of fuel last week. She used 2 gallons this week. How many gallons of fuel were consumed in the two weeks?