11. 
Mrs. Smith has to calculate the number of students in her class so she could make sure that she has enough reading books in her crate. There are four rows of chairs with eight chairs in each row in the classroom. There are five empty chairs. How many students does Mrs. Smith have in her class?


12. 
When Luis's great grandfather immigrated to the United States, he traveled to Wisconsin and bought a small farm and two cows. Now he owns the biggest dairy farm in the region. When he started out his farm was only five acres (43,560 square feet). Now he owns 1,091 acres of beautiful pastureland. How many square feet of pastureland does he own now?

