1. A board game contains 12 red coins, 26 blue coins, and 24 white coins. How many coins are there in all?   2. Mr. Anderson borrowed from the library 29 books on Wednesday, 28 books on Tuesday, and 31 books on Thursday. How many books did he borrow altogether?   3. Mrs. Moore delivered 28 letters in April, 29 letters in October, and 24 letters in September. How many letters did she deliver in the three months?   4. For her new kitchen, Mrs. Moore bought a crockery set, a cutlery set and a pressure cooker. Each item cost $ 21 . How many dollars did she spend?   5. Jack played for 2 hours, Greg played for 4 hours, and Edward played 2 hours more than Greg. How many hours did they play altogether?