1. A board game contains 11 whitecoins, 23 yellow coins, and 48 black coins. How many coins are there in all?   2. Anderson has a small library at home. He has29 books on History, 193 books on Geography, and 45 books on Science. How many books does he have altogether?   3. Mrs.Jackson delivered 229 letters in June, 328 letters in February, and 283 letters inJuly. How many letters did she deliver in the three months?   4. For her new kitchen, Mrs Nelson bought a crockery set, a cutlery set and a pressure cooker. Each item cost $ 54 . How many dollars did she spend?   5. Last month, Jack worked for 174 hours, Greg worked for 141 hours, and Edward worked 39 hours more than Greg. How many hours did they work altogether?