9s: Unit rate problems

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 a car travels 60 miles in 1 hour, the unit rate is 60 miles per hour.

Front

How do you calculate the unit rate?

Back

To calculate the unit rate, divide the quantity of interest by the number of units. For example, if 24 flowers are planted in 2 hours, the unit rate is 24 flowers ÷ 2 hours = 12 flowers per hour.

Front

If Kim plants 24 flowers in 2 hours, what is her rate in flowers per hour?

Back

Kim's rate is 12 flowers per hour.

Front

If Ben plants 33 flowers in 3 hours, what is his rate in flowers per hour?

Back

Ben's rate is 11 flowers per hour.

Front

Which is a better deal: 0.5 kg of rice at $1.80 or 5 kg of rice at $16.95?

Back

5 kg of rice at $16.95 is a better deal.

Front

What is the unit rate of 450 loaves of bread baked in 3 days?

Back

The unit rate is 150 loaves per day.

Front

What is the unit rate of 560 loaves of bread baked in 4 days?

Back

The unit rate is 140 loaves per day.

Front

If Dave paints 125 feet in 5 hours, what is his rate in feet per hour?

Back

Dave's rate is 25 feet per hour.

Front

If Eric paints 175 feet in 7 hours, what is his rate in feet per hour?

Back

Eric's rate is 25 feet per hour.

Front

How do you compare rates?

Back

To compare rates, calculate the unit rate for each option and compare the results.