Lesson 5-2: Unit Rates

Lesson 5-2:

Unit Rates

Objectives: The students will be able to find, compare, and use unit rates.

 

State Standards

7.RP.1Compute unit rates associated with ratios of fractions, including ratios of lengths, areas and other quantities measured in like or different units. 

What will Learn

•Find unit rates

•Compare and use unit rates to solve problems

Vocabulary

Rate - a special ratio of two quantities having different kinds of units.

Unit rate - when a rate is simplified so that it has a denominator of 1.

Express each rate as a unit rate. Round to the nearest tenth, if necessary.

1.) $11 for 4 boxes of cereal

2.) 400 miles on 14 gallons of gasoline

Multiple Choice

You spend $40 on 5 pounds of concrete. What is the unit rate in dollars per pound?

• $8 per pound

• $35 per pound

• $5 per pound

• $0.125 per pound

Multiple Choice

If Justin can type 408 words in 4 minutes, how many words can he type per minute?

• 102 words per minute
• 100 words per minute
• 400 words per minute
• 412 words per minute

Multiple Choice

22 miles per hour

• Ratio
• Rate
• Unit Rate

Multiple Choice

Find the unit rate of one diaper if a box of 35 diapers costs $6.99.

• $244.65
• $1.00
• $6.99
• $0.20

Multiple Choice

A store has 120 customers in 6 hours. What is the unit rate in customers per hour?

• 16 customers per hour

• 12 customers per hour

• 20 customers per hour

• 15 customers per hour

Multiple Choice

Will spent $3.75 for 3 pounds of granola. What is his unit rate in dollars per pound?

• $.50 per pound

• $1.25 per pound

• $3 per pound

• $2.50 per pound

Example 2

1. An online music store sells 15 songs for $12. Another online music store sells 10 songs for $9. Which online store has the lower cost per song?

2. A 12-oz bottle of cleaner costs $4.50. A 16-oz bottle of cleaner costs $6.56. Which costs less per ounce? Explain.

Multiple Choice

AT&T charges $76.00 for 500 minutes or Sprint charges $54.00 for 450 minutes. Which is a better deal

• Sprint
• AT&T

Multiple Choice

It cost $46.80 to fill a 13-gallon gas tank. What was the price of gas per gallon?

• $3.60

• $3.55

• $3.40

• $3.50

Multiple Choice

You buy a 6 pack soda for $2.40.

What is the cost of 1 can of soda?

• $0.80

• $0.60

• $0.50

• $0.40

Tickey Out the Door

Explain what is the difference between a rate and a unit rate.

Then create and solve a unit rate real-world word problem using the google doc provided for you in google classroom.