Lesson 85 Multiplying by 10, by 100, and by 1000

Which student has read exactly twice as many books as Jay?

• Maria

• Annie

• Hiroshi

• Jay

Hiroshi's goal is to read 10 books. How many more books does he need to read to reach his goal?

• 3

• 5

• 2

• 4

If the books Annie has read have an average of 160 pages each, how many pages has she read?

• 800

• 640

• 1440

• 720

Jim saw some pentagons. The pentagons had a total of 100 sides. How many pentagons did Jim see?

• 10

• 20

• 25

• 50

Sophia bought a rectangular piece of land that was 3 miles long and 2 miles wide. Fifty percent of the land could be farmed. How many square miles could be farmed?

• 3

• 2

• 1.5

• 6

Max bought 10 pencils for 24¢ each. The tax was 14¢. What was the total cost of the pencils?

• $2.40¢

• $2.54¢

• $2.48¢

• $2.60¢

A full pitcher of orange juice contains about how much juice?

• 2 ounces

• 2 liters

• 4 gallons

• 2 cups

One fourth of the 48 gems were rubies. How many of the gems were rubies?

• 12

• 24

• 36

• 48

What percent of the gems in problem 9 were not rubies if One fourth of the 48 gems were rubies.

• 25%

• 50%

• 75%

• 100%

One thousand fans attended the game, but only 81 fans were pleased with the outcome. What fraction of the fans who attended the game were pleased with the outcome?

• 81/1000

• 81/100

• 81/900

• 81/810