Johann has 3 sheets of wallpaper. Each sheet of wallpaper has an area of 12 square feet. Johann cuts the wallpaper into square foot pieces. How many pieces are there altogether?
multiply 3 *12 because there is 3 sheets and they are each 12 sq foot then you get 36. divide that by 4 because she cut the sheets four foot sheets and your answer is 9 sheets.
