Unit Rates and Better Buy

Front

What is a unit rate?

Back

A unit rate is a comparison of two different quantities when they are combined together. It is expressed as a quantity per one unit of another quantity.

Front

How do you calculate a unit rate?

Back

To calculate a unit rate, divide the first quantity by the second quantity to find out how much of the first quantity corresponds to one unit of the second quantity.

Front

What is the formula for finding the better buy?

Back

To find the better buy, calculate the unit price (cost per unit) for each option and compare them. The option with the lower unit price is the better buy.

Front

If a car travels 120 miles on 5 gallons of gas, what is the gas mileage in miles per gallon?

Back

Gas mileage = 120 miles / 5 gallons = 24 miles per gallon.

Front

If a car travels 175 miles on 8 gallons of gas, what is the gas mileage in miles per gallon?

Back

Gas mileage = 175 miles / 8 gallons = 21.875 miles per gallon.

Front

Which is a better deal: 27 ounces of nacho chips for $3.51 or 10 ounces for $1.30?

Back

Neither, as both options have a higher cost per ounce compared to other potential options.

Front

How do you determine the cost per ounce?

Back

To determine the cost per ounce, divide the total cost by the number of ounces.

Front

What is the cost per yard for $16.52 for 6 yards?

Back

Cost per yard = $16.52 / 6 yards = $2.75 per yard.

Front

What is the cost per yard for $13.85 for 5 yards?

Back

Cost per yard = $13.85 / 5 yards = $2.77 per yard.

Front

If Sarah buys 15 kg of tomatoes for $32.25, what is the cost per kg?

Back

Cost per kg = $32.25 / 15 kg = $2.15 per kg.