1. Invitations were sent to 112 relatives for a family get-together. Only 97 relatives came. How many relatives did not come?   2.  There are five members in Peter's family. Their total weight is 276 kg. His own weight is 36 kg. How many kilograms do the other four members weigh?   3. Mr. Hurt will be 68 next year. His son is 31 years younger than him. How many years old is his son at present?   4. A family party has 119 adults, 28 boys, and 20 girls. How many more adults are there at the party than children?   5. For Christmas, Mr. Nelson gave $118 to his two sons. He gave $91 to the elder son. How many dollars did he give the younger son?