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 one unit. For example, if you buy 4 apples for $2, the unit rate is $0.50 per apple.

Front

How do you calculate the unit rate?

Back

To calculate the unit rate, divide the total cost by the number of items. For example, if 6 pencils cost $1.26, the unit rate is $1.26 ÷ 6 = $0.21 per pencil.

Front

Which is a better buy: 7 pencils for $1.40 or 6 pencils for $1.26?

Back

7 pencils for $1.40 is a better buy because the unit rate is lower at $0.20 per pencil compared to $0.21 per pencil for 6 pencils.

Front

What is the best deal between 0.5 kg of rice at $1.80 and 5 kg of rice at $16.95?

Back

5 kg of rice at $16.95 is the best deal because the unit rate is lower at $3.39 per kg compared to $3.60 per kg for 0.5 kg.

Front

How do you find the best deal when comparing prices?

Back

To find the best deal, calculate the unit rate for each option and compare them. The option with the lowest unit rate is the best deal.

Front

What is the unit rate for 15 kg of tomatoes costing $32.25?

Back

The unit rate is $32.25 ÷ 15 kg = $2.15 per kg.

Front

If 1/2 pint of oil costs $0.90, what is the cost per pint?

Back

The cost per pint is $0.90 × 2 = $1.80 per pint.

Front

Which is a better buy: 1 pint of oil for $1.65 or 2 pints for $3.20?

Back

2 pints for $3.20 is a better buy because the unit rate is $1.60 per pint compared to $1.65 per pint for 1 pint.

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.

Front

What is the gas mileage for Ms. Salemi's Volvo if it got 120 miles on 5 gallons?

Back

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