1. Warreninvites 32 boys and 40 girls to his birthday party. How many friends did he invite?   2. There are 4 cakes. Each cake is cut into 6 pieces. How many pieces are there in all?   3. There are 40 sandwiches to be arranged equally in 8 trays. How many sandwiches will there be in each tray?   4. Dad has planned 5 games for the party. Each game would have 3 winners. How many prizes would Dad give away?   5. Mom places 81 paper plates on the table in 9 rows. How many paper plates are there in each row?