Topic 4 Review

DJ works 18 hours a week. Which expression shows a good way to use rounding to estimate how many hours DJ will work in 52 weeks?

• 10 x 50

• 10 x 50

• 20 x 50

• 18 x 60

There are 24 cheer teams competing in a contest. There are 18 cheerleaders on each team. Select all the expressions that are NOT good ways to use compatible numbers to estimate the number of cheerleaders competing.

• 20 x 20

• 25 x 18

• 18 x 24

• 10 x 10

• 20 x 15

There are 21 rows of seats. Each row has 42 seats. Use rounding to estimate the total number of seats.

A movie theater sells 50 tickets for each showing of a movie. The theater showed the movie 40 times. How many tickets did the theater sell?

• 20,000 tickets

• 2,000 tickets

• 200 tickets

• 20 tickets

A florist makes centerpieces. He puts 18 roses in 12 centerpieces. How many roses did he use?

• 120

• 180

• 216

• 200

Tess has 15 pages in her coin collector's album. Each page holds 32 coins. How many coins can she fit in the album?

• 300

• 320

• 450

• 480

What is the product of 23 and 48?

• 800

• 920

• 1,104

• 960

Use partial products to solve: 61 x 33

• 1,800

• 1,830

• 1,980

• 2,013

Which equation solves for the partial product of box B?

• 10 x 10

• 10 x 5

• 9 x 10

• 9 x 5

Find the product that is modeled by the picture.

• 285

• 190

• 150

• 195