1. A board game contains 68 whitecoins, 53 blue coins, and 56 black coins. How many coins are there in all?   2. Hick has a small library at home. He has27 books on History, 126 books on Geography, and 184 books on Science. How many books does he have altogether?   3. Mrs.Jackson delivered 270 letters in July, 245 letters in June, and 302 letters inDecember. How many letters did she deliver in the three months?   4. For her new kitchen, Mrs Lee bought a crockery set, a cutlery set and a pressure cooker. Each item cost $ 49 . How many dollars did she spend?   5. Last month, Jack worked for 175 hours, Greg worked for 155 hours, and Edward worked 25 hours more than Greg. How many hours did they work altogether?