Unit Rates

Unit Rates

A rate compares two quantities with DIFFERENT units.

Driving 120 miles in 2 hours

The units are miles & hours

Multiple Choice

Which is a rate?

• $\frac{2\ \ feet}{6\ \ feet}$ "2 feet to 6 feet"

• $\frac{4\ cups}{8\ cups}$ "4 cups to 8 cups"

• $\frac{10\ words}{30\ \sec onds}$ "10 words in 30 seconds"

A unit rate is a rate that is simplified so that it has a denominator (2nd #) of 1 unit.

Driving 60 miles in 1 hour or 60 miles/1 hour

/ = "per"

Multiple Choice

Which is a UNIT rate?

• 100 miles / 3 hours

• 35 miles / 1 hour

• 70 miles / 2 hours

In order to simplify and find the unit rate: ALWAYS divide both numbers by the second number!

Multiple Choice

Find the unit rate (how many avocados per bag):

42 avocados in 7 bags

• 7 avocados/bag

• 6 avocados/bag

• 7 bags/avocado

• 14 avocados/bag

Multiple Choice

Find the unit rate (how many minutes per video):

24 minutes to watch 4 videos

• 4 minutes/video

• 4 videos/minute

• 6 minutes/video

• 8 minutes/video