Analyze Units

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7-3
Analyze Units
Warm Up
Problem of the Day
Lesson Presentation
Pre-Algebra
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Warm Up Find 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
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Learn to use one or more conversion factors to
solve rate problems.
To convert units, multiply by one or more ratios
of equal quantities called conversion factors.
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Find the appropriate factor for each conversion.

• A. feet to yards
• B. pounds to ounces

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A model airplane flies 22 feet in 2 seconds.
What is the airplanes speed in miles per hour?
There are about 400 cocoa beans in a pound.
There are 2.2 pounds in a kilogram. About how
many grams does a cocoa bean weigh?
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Find the appropriate factor for each conversion.

• A. minutes to seconds
• B. hours to days

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Find the number of umbrellas sold in a year at a
rate of 5 umbrellas sold per day?
If a manufacturer can produce 0.2 bricks every
tenth of a second, how many bricks can be
produced in an eight hour day?
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Lesson Quiz

• Find the appropriate factor for each conversion.
• kilograms to grams
• 2. pints to gallons

1000 g kg
1 gal 8 pt
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3. You drive 136 miles from your house to your
aunts house at the lake. You use 8 gallons of
gas. How many yards does your car get to the
gallon? 4. A cheetah was timed running 200
yards in 6 seconds. What was the average speed in
miles per hour?
29,920 yd gal
68 mi/h
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Homework

• Pg 353
• 1 12 all, 15 20 all, 30 33 all