2. Math Module 1 Ratios and Unit Rates
Topic C: Unit Rates
Lesson 21: Getting the Job Done – Speed, Work, and Measurement Units
6.RP.2 6.RP.3b 6.RP.3d
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3. Lesson 21 Target
I can use rates between measurements to convert measurement in one unit to measurement in another unit.
I can manipulate and transform units appropriately when multiplying or dividing quantities.

4. Opening Exercise: 5 minutes
Classwork
Opening Exercise: 5 minutes
Lesson 21

5. Classwork
Example 1: 10 minutes
Lesson 21
Conversion tables are really ratio tables that can be used to convert units of length, weight, or capacity (and other units, too). You must multiply the given number by the ratio that compares the two units.

6. Classwork
Example 1: 10 minutes
Lesson 21
Work with your partner to find out how many feet are in 48 inches. Make a ratio table that compares feet and inches. Use the conversion rate of 12 inches per foot or foot per inch.
You can multiply 48 by or divide 48 by 12. The result is 4 feet either way.

7. Classwork
Example 2: 10 minutes
Lesson 21

8. Classwork
Exercises: 10 minutes
Lesson 21

9. Classwork
Exercises: 10 minutes
Lesson 21

10. Lesson 21

11. 10 cups ×( 4 𝑐𝑢𝑝𝑠 1 𝑞𝑢𝑎𝑟𝑡 ) = 40 quarts
Lesson21
Closing
In Exercise 2, what if it was set up this way:
10 cups ×( 4 𝑐𝑢𝑝𝑠 1 𝑞𝑢𝑎𝑟𝑡 ) = 40 quarts
What is wrong with that set up?
I can use rates between measurements to convert measurement in one unit to measurement in another unit.
If the conversion factor is flipped upside down, the units will not cancel and the number won’t make sense

12. Lesson 21
Exit Ticket
Lesson 1

13. Lesson 21
Exit Ticket
Lesson 1

14. Problem Set

15. Problem Set

16. Problem Set