1. Each class in a school has 52 students. If there are 9 classes, how many students are there in the school?   2. A school picnic costs $ 4 for each child. If there are 30 children in the class, how many dollars will the teacher collect?   3. If 38 children gave4flowers each to the teacher,how many flowers does the teacher have?   4. The Math teacher does5 sums everyday. After 61 days, how many sums has she done?   5. For a school day parade, students are arranged in 5 rows. There are 16 students in each row. How many total students are there in the parade?