Unit Rates Flashcard

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. For example, 60 miles per hour is a unit rate because it describes miles traveled in one hour.

Front

Which of the following is a unit rate? 70 miles per hour, 15 pages per 20 minutes, $15 per pound, 1000 meters per kilometer?

Back

70 miles per hour and $15 per pound are unit rates. 15 pages per 20 minutes is not a unit rate because it does not express a quantity per one unit of time.

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

If a realtor visits 12 houses in 3 hours, what is the unit rate in houses per hour?

Back

4 houses per hour.

Front

What must be true about a unit rate?

Back

A unit rate is always expressed as a quantity per one unit of another quantity.

Front

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

Back

$8 per pound.

Front

Alycia earned $20.40 in 3 hours. What is her unit rate in dollars per hour?

Back

$6.80 per hour.

Front

What is the unit rate of 15 pages read in 20 minutes?

Back

0.75 pages per minute (15 pages ÷ 20 minutes).

Front

If a car travels 150 miles in 3 hours, what is the unit rate in miles per hour?

Back

50 miles per hour.

Front

What is the unit rate of 100 calories burned in 30 minutes?

Back

3.33 calories per minute (100 calories ÷ 30 minutes).