1. A board game contains 29 green coins, 13 black coins, and 10 blue coins. How many coins are there in all?   2. Mr. Lee borrowed from the library 22 books on Wednesday, 11 books on Thursday, and 3 books on Monday. How many books did he borrow altogether?   3. Mrs. Hurt delivered 20 letters in April, 25 letters in September, and 31 letters in October. How many letters did she deliver in the three months?   4. For her new kitchen, Mrs. Hurt bought a crockery set, a cutlery set and a pressure cooker. Each item cost $ 27 . How many dollars did she spend?   5. Jack played for 6 hours, Greg played for 7 hours, and Edward played 6 hours more than Greg. How many hours did they play altogether?