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

Front

How do you calculate a unit rate?

Back

To calculate a unit rate, divide the first quantity by the second quantity. For example, if you can type 408 words in 4 minutes, the unit rate is 408 ÷ 4 = 102 words per minute.

Front

If Rose spent $2.00 for 20 pieces of gum, what is the unit rate per piece of gum?

Back

The unit rate is $2.00 ÷ 20 = $0.10 per piece of gum.

Front

If Joe spent $1.50 for 10 pieces of gum, what is the unit rate per piece of gum?

Back

The unit rate is $1.50 ÷ 10 = $0.15 per piece of gum.

Front

Who got the better deal on gum, Rose or Joe?

Back

Rose got the better deal because her unit rate is $0.10 per piece of gum, while Joe's is $0.15.

Front

What is the formula to find miles per gallon (mpg)?

Back

The formula to find miles per gallon is: mpg = total miles driven ÷ total gallons of gas used.

Front

If my father drove 231 miles with 7 gallons of gas, what is his mileage?

Back

His mileage is 231 ÷ 7 = 33 miles per gallon.

Front

How do you determine the slowest reading rate from a set of options?

Back

To determine the slowest reading rate, calculate the number of pages read per minute for each option and compare them.

Front

If a teacher grades 25 homework assignments in 20 minutes, what is the grading rate per assignment?

Back

The grading rate is 25 ÷ 20 = 1.25 assignments per minute.

Front

If the teacher grades 36 homework assignments in 30 minutes, what is the grading rate per assignment?

Back

The grading rate is 36 ÷ 30 = 1.2 assignments per minute.