1. A board game contains 27 red coins, 33 white coins, and 28 green coins. How many coins are there in all?   2. Mr. Nelson borrowed from the library 23 books on Tuesday, 6 books on Wednesday, and 19 books on Thursday. How many books did he borrow altogether?   3. Mrs. Smith delivered 32 letters in February, 28 letters in January, and 26 letters in May. How many letters did she deliver in the three months?   4. For her new kitchen, Mrs. Smith 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 3 hours, Greg played for 5 hours, and Edward played 3 hours more than Greg. How many hours did they play altogether?