1. A board game contains 29 black coins, 21 red coins, and 19 blue coins. How many coins are there in all?   2. Mr. Gates borrowed from the library 6 books on Tuesday, 9 books on Friday, and 25 books on Wednesday. How many books did he borrow altogether?   3. Mrs. Buffet delivered 28 letters in May, 27 letters in June, and 27 letters in July. How many letters did she deliver in the three months?   4. For her new kitchen, Mrs. Buffet bought a crockery set, a cutlery set and a pressure cooker. Each item cost $ 24 . How many dollars did she spend?   5. Jack played for 9 hours, Greg played for 2 hours, and Edward played 8 hours more than Greg. How many hours did they play altogether?