1. Johninvites 99 boys and 22 girls to his birthday party. How many friends did he invite?   2. There are 12 cakes. Each cake is cut into 6 pieces. How many pieces are there in all?   3. There are 160 sandwiches to be arranged equally in 10 trays. How many sandwiches will there be in each tray?   4. Dad has planned 18 games for the party. Each game would have 6 winners. How many prizes would Dad give away?   5. Mom places 15 paper plates on the table in 10 rows. How many paper plates are there in each row?