5.1C Lesson: Comparing and Using Unit Rates*
Name:
Period:
Activity 1: Comparing Unit Rates
I. Find Unit Rates: Practice.
Ratio
1. 7 hours to drive 231
miles. Find the rate in
miles per hour.
2. 375 students for 12
teachers. Find the rate in
students per teacher.
Rate
(Ratio as a fraction)
Unit Rate
231 miles
7 hours
33 miles per hour
3. $47.95 for 7 hours work
Find the rate in $ per hour.
4. 1 dozen bagels for $5.40
Find the rate in $ per
bagel.
5. 5 blankets in 11 hours
Find the rate in blankets
per hour.
II. Compare Unit Rates: Calculate each unit rate to justify your comparisons.
6. Jean sells M&Ms to friends at 7. Ribbon: 5 m for $6.45 or 240 8. Tom sells baseball cards at
4 for 5 cents. The machine at
cm for $3.19. Which ribbon is
10 for 35 cents. Is that a
the store sells 9 for 25 cents.
cheaper per meter? (1 m =
better deal than 12 for 40
Which is the better deal?
100 cm)
cents?
.
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Activity 2: Using Unit Rates
Use the tables to identify the unit rates. Then use the unit rate to answer the questions.
9.
Cups of flour
2
4
6
8
10
Number of
Cookies
12
24
36
48
60
a. What is the unit rate in cups of flour per cookie?
b. How many cups of flour would be used to make 20 cookies?
c. What is the unit rate in cookies per cups of flour?
d. How many cookies could be made with 5 cups of flour?
e. How many cookies could be made with 0 cups of flour?
10.
Inches of
snowfall
1
2
3
4
5
Hours
1
2
1
3
2
2
5
2
a. What is the unit rate in inches per hour?
b. At this rate, how many inches of snow would have fallen in 2 hours?
c. What is the unit rate in hours per inch?
d. At this rate, if there is 7 inches of snow, how long has it been snowing?
e. How many inches will it snow in 0 hours?
SDUHSD Math A Honors Module #5 – STUDENT EDITION
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11.
Dollars
3
4.50
6
7.50
Pesos
1
1.5
2
2.5
a. What is the unit rate in pesos per dollar?
b. At this rate, how many pesos is equivalent to 8 dollars?
c. What is the unit rate in dollars per pesos?
d. At this rate, how many dollars is equivalent to 18.60 pesos?
e. If you have 0 pesos, how many dollars is that worth?
12. The rates for two pay-as-you-go cell phone companies are given. Round to the nearest cent.
On Call
Talk Time
3.5 hours for $10
hour for $1.25
a. What is the unit rate in dollars per hour for each company? Round to the nearest cent.
b. Which company offers the best deal? Explain.
c. Another company offers a rate of $0.05 per minute. How would you find the unit rate per hour?
Find the unit rate for this company.
d. Is the rate you found in part c a better deal than On Call or Talk Time? Explain.
13. When comparing the unit rates of 3 ounces for $1 and 4 ounces for $1, explain why 4 ounces for $1 is
the better buy.
14. When comparing the units rates of 33 cents per ounce and 25 cents per ounce, explain why 25 cents
per ounce is the better buy.
SDUHSD Math A Honors Module #5 – STUDENT EDITION
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