1. Adam invites 5 friends to his birthday party. He gives 4 balloons to each friend. How many balloons did he distribute?   2. There are 3 cakes. Each cake is cut into 6 pieces. How many pieces are there in all?   3. There are 8 sandwiches arranged in a tray. How many sandwiches are there in 3 trays?   4. Dad has planned 4 games for the party. Each game would have 2 winners. How many prizes would Dad give away?   5. There are 9 rows of tea cups. Each row has 8 cups. How many cups are there altogether?