1. A board game contains 18 redcoins, 32 green coins, and 14 yellow coins. How many coins are there in all?   2. Smith has a small library at home. He has23 books on History, 155 books on Geography, and 61 books on Science. How many books does he have altogether?   3. Mrs.Douglas delivered 272 letters in March, 302 letters in June, and 331 letters inSeptember. 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 $ 74 . How many dollars did she spend?   5. Last month, Jack worked for 175 hours, Greg worked for 141 hours, and Edward worked 27 hours more than Greg. How many hours did they work altogether?