Each time a student turns in a perfect spelling test, Ms. Ricks puts an achievement square on the bulletin board. There are 6 rows of squares on the bulletin board. Each row has 30 squares. How many perfect spelling tests have been turned in?

Think: 6 x 30 = 6 x (10 + 10 + 10)
                     = 60 + 60 + 60 = 180

180 spelling tests                              

Norma practices violin for 50 minutes every day. How many minutes does Norma practice violin in 7 days?

A kitchen designer is creating a new backsplash for the wall behind a kitchen sink. The backsplash will have 5 rows of tiles. Each row will have 20 tiles. How many tiles are needed for the entire backsplash?

A bowling alley keeps shoes in rows of cubbyholes. There are 9 rows of cubbyholes, with 20 cubbyholes in each row. If there is a pair of shoes in every cubbyhole, how many pairs of shoes are there?

The third-grade students are traveling to the science museum in 8 buses. There are 40 students on each bus. How many students are going to the museum?