Unit Rates and Ratios Practice

Mr. Holcomb introduces a math lesson on ratios and unit rates, starting with a class activity involving timing students passing out modules. He explains the concept of ratios and unit rates, using examples to illustrate how they work. The lesson includes calculating rates from the class activity and exploring gender ratios in a class. Finally, an exercise compares the cost of pencil packs to determine the better buy, demonstrating practical applications of the concepts taught.

What was the initial time taken to pass out the modules in the class activity?

• 34 seconds

• 12 seconds

• 10 seconds

• 16 seconds

Which of the following best describes a ratio?

• A decimal

• A fraction

• An ordered pair of numbers

• A single number

If a ratio of 4 to 5 is multiplied by 3, what is the new equivalent ratio?

• 16 to 20

• 8 to 10

• 20 to 25

• 12 to 15

What is the unit rate if 12 papers are passed out in 34 seconds?

• 0.35 papers per second

• 0.75 papers per second

• 2.5 papers per second

• 1.2 papers per second

How many papers per second were passed out when the time was reduced to 10 seconds?

• 1.2 papers per second

• 0.75 papers per second

• 0.35 papers per second

• 2.5 papers per second

In the class by gender example, what is the ratio of boys to girls in the second class?

• 6 to 18

• 5 to 11

• 7 to 14

• 1 to 7

What is the cost per pencil in a 30-pack priced at $7.97?

• $0.27

• $0.35

• $0.46

• $0.53

Which pack offers a better buy based on the unit price per pencil?

• 12-pack

• 30-pack

• Both are the same

• Neither

How much would 60 pencils cost if bought in 12-packs?

• $15.94

• $18.75

• $23.85

• $19.50

What is the total cost of 60 pencils if bought in 30-packs?

• $15.94

• $23.85

• $19.50

• $18.75