1. A board game contains 19 yellowcoins, 75 green coins, and 80 black coins. How many coins are there in all?   2. Brown has a small library at home. He has90 books on History, 64 books on Geography, and 121 books on Science. How many books does he have altogether?   3. Mrs.Baker delivered 307 letters in November, 213 letters in September, and 261 letters inDecember. How many letters did she deliver in the three months?   4. For her new kitchen, Mrs Hurt 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 168 hours, Greg worked for 122 hours, and Edward worked 30 hours more than Greg. How many hours did they work altogether?