• rate

• unit rate

• Determine units rates.

Find Unit Rates

READING Julia read 52 pages in 2 hours. What is the average number of pages she read per hour?

Write the rate as a fraction. Then find an equivalent rate with a denominator of 1.

Write the rate as a fraction.

Divide the numerator and denominator by 2.

Simplify.

Find Unit Rates

Answer: The average number of pages Julia read, or unit rate, is 26 pages per hour.

1. A

2. B

3. C

4. D

A. 4 laps per minute

B. 12 laps per minute

C. 20 laps per minute

D. 64 laps per minute

SWIMMING Natalie swam 16 laps in 4 minutes. What is the average number of laps she swam per minute?

Find Unit Rates

SODA Find the unit price per can if it costs $3 for6 cans of soda. Round to the nearest hundredth if necessary.

Answer: The unit price is $0.50 per can.

Write the rate as a fraction.

Divide the numerator and the denominator by 6.

Simplify.

1. A

2. B

3. C

4. D

COOKIES Find the unit price per cookie if it costs $3 for 12 cookies.

A. $0.18 per cookie

B. $0.21 per cookie

C. $0.25 per cookie

D. $3.60 per cookie

The costs of 4 different sizes of orange juice are shown in the table. Which container costs the least per ounce?

A 96-oz containerB 64-oz containerC 32-oz containerD 16-oz container

Read the ItemFind the unit price, or the cost per ounce, of each size of orange juice. Divide the price by the number of ounces.

Compare Using Unit Rates

Solve the Item

The 96-ounce container of orange juice costs the least per ounce.

16-ounce container $1.28 ÷ 16 ounces = $0.08 per ounce

32-ounce container $1.92 ÷ 32 ounces = $0.06 per ounce

64-ounce container $2.56 ÷ 64 ounces = $0.04 per ounce

96-ounce container $3.36 ÷ 96 ounces = $0.035 per ounce

Compare Using Unit Rates

Answer: A

1. A

2. B

3. C

4. D

The costs of different sizes of bottles of laundry detergent are shown below. Which bottle costs the least per ounce?

A. 96-oz container

B. 64-oz container

C. 32-oz container

D. 16-oz container

POTATOES An assistant cook peeled 18 potatoes in 6 minutes. At this rate, how many potatoes can he peel in 50 minutes? Find the unit rate.

Answer: The assistant cook can peel 150 potatoes in 50 minutes.

Use a Unit Rate

Then multiply this unit rate by 50 to find the number of potatoes he can peel in 50 minutes.

1. A

2. B

3. C

4. D

A. 21 beads

B. 63 beads

C. 120 beads

D. 180 beads

Sarah can paint 21 beads in 7 minutes. At this rate, how many beads can she paint in one hour?

End of the Lesson