1. Mark invites 91 friends to his birthday party. He gives 6 balloons to each friend. How many balloons did he distribute?   2. There are 19 cakes. Each cake is cut into 8 pieces. How many pieces are there in all?   3. There are 12 sandwiches arranged in a tray. How many sandwiches are there in 7 trays?   4. Dad has planned 7 games for the party. Each game would have 11 winners. How many prizes would Dad give away?   5. There are 13 rows of tea cups. Each row has 6 cups. How many cups are there altogether?