Pre-Algebra

7-3 Analyze Units

Warm UpFind each unit rate.

1. Jump rope 192 times in 6 minutes

2. Four pounds of bananas for $2.36

3. 16 anchor bolts for $18.56

4. 288 movies on 9 shelves

32 jumps/min

$0.59/lb

$1.16/bolt

32 movies/shelf

Pre-Algebra

7-3 Analyze Units

Pre-Algebra

7-3 Analyze Units

Learn to use one or more conversion factors to solve rate problems.

Pre-Algebra

7-3 Analyze Units

Vocabulary

conversion factor

Pre-Algebra

7-3 Analyze Units

The conversion factor

• must introduce the unit desired in the answer and

• must cancel the original unit so that the unit desired is all that remains.

Helpful Hint

Pre-Algebra

7-3 Analyze Units

Find the appropriate factor for each conversion.

Additional Example 1: Finding Conversion Factors

A. feet to yards

B. pounds to ounces

There are 3 feet in 1 yard.

There are 16 ounces in 1 pound.

Pre-Algebra

7-3 Analyze Units

Try This: Example 1

Find the appropriate factor for each conversion.

A. minutes to seconds

B. hours to days

There are 60 seconds in 1 minute.

There are 24 hours in 1 day.

Pre-Algebra

7-3 Analyze Units

Lesson Quiz

Find the appropriate factor for each conversion.

1. kilograms to grams

2. pints to gallons

3. You drive 136 miles from your house to your aunt’s

house at the lake. You use 8 gallons of gas. How many

yards does your car get to the gallon?