Topic 5 Assessment

1. Don works 18 hours a week at the library. Which shows the best way to use rounding to estimate how many hours Don will work in 52 weeks?

• A. 10 X 50
• B. 10 X 60
• C. 20 X 50
• D. 18 X 60

2. A Virginia opossum can have up to 21 babies at one time. Suppose 10 Virginia opossums had babies all at the same time. How many baby opossums could there be?

• A. 320 opossums
• B. 240 opossums
• C. 110 opossums
• D. Not here

3. There are 21 rows in an auditorium. Each row has 42 seats. Use rounding to estimate the total number of seats. (Answer with just the number.)

4. There are 24 schools competing in a cheerleading contest. There are 18 cheerleaders on each team. Which is NOT a good way to use compatible numbers to estimate the number of cheerleaders that are competing?

• A. 20 X 20
• B. 25 X 20
• C. 10 X 10
• D. 30 X 20

5. A movie theater sells 50 tickets for each showing of a movie. They showed the movie 40 times last week. How many tickets did they sell?

• A. 20,000 tickets
• B. 2,000 tickets
• C. 200 tickets
• D. 20 tickets

6. Elaine is making 20 pinecone wreathes to sell at a fair. She needs 13 pinecones for each wreath. How many pinecones does she need in all. (Answer with just the number)

7. Mr. Hans bought 40 boxes of tiles for his kitchen floor. Each box of tiles cost $30. How much money did Mr. Hans pay for the tiles?

• A. $120
• B. $700
• C. $1,200
• D. $7,000

8. A florist makes centerpieces for an event. He puts 22 roses in each centerpiece. Which is the best way to use compatible numbers to estimate the number of roses he needs for 26 centerpieces?

• A. 10 X 25 = 250
• B. 20 X 25 = 500
• C. 25 X 30 = 750
• D. 30 X 30 = 900

9. Justine's plant stand has 6 shelves. Each shelf holds 4 plants. Justine has already placed 16 plants on her stand. How many more plants can she fit on the plant stand. (Answer with just the number.)

10. A school building is 32 feet tall. There are 12 inches in a foot. About how many inches tall is the building?

• A. About 94 inches
• B. About 300 inches
• C. About 500 inches
• D. About 700 inches