1. Invitations were sent to 91 relatives for a family get-together. Only 71 relatives came. How many relatives did not come?   2.  There are five members in Jack's family. Their total weight is 283 kg. His own weight is 43 kg. How many kilograms do the other four members weigh?   3. Mr. Stewart will be 65 next year. His son is 31 years younger than him. How many years old is his son at present?   4. A family party has 123 adults, 28 boys, and 26 girls. How many more adults are there at the party than children?   5. For Christmas, Mr. Baker gave $132 to his two sons. He gave $91 to the elder son. How many dollars did he give the younger son?