1. Mr. Buffet drove 10 miles in his new car on Saturday and 45 miles on Tuesday.  How many miles did he drive in these two days?   2. There are 4 vans and 5 cabs in a parking lot. How many vehicles are there in the parking lot?   3. There are 18 men and 18 women in an aeroplane. How many passengers are there altogether?   4. Robert is a mechanic. He repaired 17 cars and 31 trucks last month. How many vehicles did he repair altogether?   5. Mrs. Nelson used 7 gallons of fuel last week. She used 2 gallons this week. How many gallons of fuel were consumed in the two weeks?