Best Buy: Unit Rates

Front

What is a unit rate?

Back

A unit rate is a comparison of two different quantities where one of the quantities is expressed as a quantity of one. It is often used to determine the cost per item or the rate of consumption.

Tags

CCSS.6.RP.A.1

CCSS.6.RP.A.2

Front

How do you calculate the unit rate from a total cost and quantity?

Back

To calculate the unit rate, divide the total cost by the total quantity. For example, if 8 apples cost $5.20, the unit rate is $5.20 ÷ 8 = $0.65 per apple.

Tags

CCSS.6.RP.A.1

CCSS.6.RP.A.2

Front

What is the formula for finding the best deal when comparing prices?

Back

To find the best deal, calculate the unit price for each option by dividing the total price by the quantity. The option with the lowest unit price is the best deal.

Tags

CCSS.6.RP.A.3B

Front

If 27 ounces of nacho chips cost $3.51 and 10 ounces cost $1.30, how do you determine which is the better deal?

Back

Calculate the unit price for each: 27 ounces = $3.51 ÷ 27 = $0.13 per ounce; 10 ounces = $1.30 ÷ 10 = $0.13 per ounce. Since both have the same unit price, neither is a better deal.

Tags

CCSS.6.RP.A.3B

Front

What is the unit price of 200g of lollies that cost $1.65?

Back

The unit price is calculated as $1.65 ÷ 200g = $0.00825 per gram.

Tags

CCSS.6.RP.A.1

CCSS.6.RP.A.2

Front

How do you compare gas mileage between two cars?

Back

To compare gas mileage, calculate the miles per gallon (MPG) for each car by dividing the miles driven by the gallons used. The car with the higher MPG is more fuel-efficient.

Tags

CCSS.6.RP.A.3B

Front

If Ms. Salemi's Volvo gets 120 miles on 5 gallons, what is its gas mileage?

Back

The gas mileage is calculated as 120 miles ÷ 5 gallons = 24 miles per gallon.

Tags

CCSS.6.RP.A.1

CCSS.6.RP.A.2

Front

What is the cost of one dozen crabs if 2 1/2 dozen cost $75?

Back

To find the cost of one dozen, first convert 2 1/2 dozen to a fraction: 2.5 dozen = 2.5 x 12 = 30 crabs. Then, $75 ÷ 2.5 = $30 per dozen.

Tags

CCSS.7.RP.A.1

Front

What is the significance of unit rates in real-life applications?

Back

Unit rates help consumers make informed decisions by allowing them to compare prices and quantities effectively, ensuring they get the best value for their money.

Tags

CCSS.6.RP.A.3B

Front

How can you determine if a deal is worth it when comparing different quantities?

Back

Always convert the prices to a common unit (e.g., price per ounce, price per item) to make an accurate comparison.

Tags

CCSS.6.RP.A.3B