splash screen. 1.a 2.b 3.c 4.d five minute check 6 a.10:34 b.17:5 c.5:17 d.34:10 among the staff at...
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Lesson Menu Main Idea and Vocabulary Example 1:Find Unit Rates Example 2:Find Unit Rates Example 3:Test Example: Compare Using Unit Rates Example 4:Real-World Example: Use a Unit RateTRANSCRIPT
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1. A2. B3. C4. D
0% 0%0%0%
A. 10:34
B. 17:5
C. 5:17
D. 34:10
Among the staff at Roosevelt Elementary, 68 teachers prefer coffee and 20 prefer tea. Which ratio shows the relationship of coffee drinkers to tea drinkers in simplest form?
(over Lesson 6-1)
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Main Idea and VocabularyExample 1:Find Unit RatesExample 2:Find Unit RatesExample 3:Test Example: Compare Using Unit RatesExample 4:Real-World Example: Use a Unit Rate
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• Rate – ratio that compares 2 quantities with different kind of units.
• unit rate – rate is simplified so that it has a denominator of 1 unit.
• Determine units rates (2.1.8D) (M7.A.2.2).
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Find Unit Rates
READING Julia read 52 pages in 2 hours. What is the average number of pages she read per hour?Write the rate as a fraction. Then find an equivalent rate with a denominator of 1.
Write the rate as a fraction.
Divide the numerator and denominator by 2.
Simplify.
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Find Unit Rates
Answer: The average number of pages Julia read, or unit rate, is 26 pages per hour.
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1. A2. B3. C4. D0% 0%0%0%
A. 4 laps per minute
B. 12 laps per minute
C. 20 laps per minute
D. 64 laps per minute
SWIMMING Natalie swam 16 laps in 4 minutes. What is the average number of laps she swam per minute?
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Find Unit Rates
SODA Find the unit price per can if it costs $3 for6 cans of soda. Round to the nearest hundredth if necessary.
Answer: The unit price is $0.50 per can.
Write the rate as a fraction.
Divide the numerator and the denominator by 6.
Simplify.
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1. A2. B3. C4. D0% 0%0%0%
COOKIES Find the unit price per cookie if it costs $3 for 12 cookies.A. $0.18 per cookie
B. $0.21 per cookie
C. $0.25 per cookie
D. $3.60 per cookie
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The costs of 4 different sizes of orange juice are shown in the table. Which container costs the least per ounce?A 96-oz containerB 64-oz containerC 32-oz containerD 16-oz container
Read the ItemFind the unit price, or the cost per ounce, of each size of orange juice. Divide the price by the number of ounces.
Compare Using Unit Rates
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Solve the Item
The 96-ounce container of orange juice costs the least per ounce.
16-ounce container $1.28 ÷ 16 ounces
=
$0.08 per ounce32-ounce container $1.92 ÷ 32 ounces
=
$0.06 per ounce64-ounce container $2.56 ÷ 64 ounces
=
$0.04 per ounce96-ounce container $3.36 ÷ 96 ounces
=
$0.035 per
ounce
Compare Using Unit Rates
Answer: A
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1. A2. B3. C4. D
0% 0%0%0%
The costs of different sizes of bottles of laundry detergent are shown below. Which bottle costs the least per ounce?
A. 96-oz container
B. 64-oz container
C. 32-oz container
D. 16-oz container
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POTATOES An assistant cook peeled 18 potatoes in 6 minutes. At this rate, how many potatoes can he peel in 50 minutes? Find the unit rate.
Answer: The assistant cook can peel 150 potatoes in 50 minutes.
Use a Unit Rate
Then multiply this unit rate by 50 to find the number of potatoes he can peel in 50 minutes.
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1. A2. B3. C4. D0% 0%0%0%
A. 21 beads
B. 63 beads
C. 120 beads
D. 180 beads
Sarah can paint 21 beads in 7 minutes. At this rate, how many beads can she paint in one hour?
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1. A2. B3. C4. D
Find each unit rate. Round to the nearest hundredth if necessary.
1. $300 for 6 hours
2. 220 miles on 8 gallons
3. 90 miles on 15 gallons
4. 1,680 kilobytes in 4 minutes
5. 5 pounds for $2.49
6. 152 feet in 16 seconds
$50 per hour
27.5 miles per gallon
6 miles per gallon
420 kb per minute
$.50 per pound
9.5 feet per second
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End of the Lesson
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Five-Minute Check (over Lesson 6–1)
Image Bank
Math Tools
Scale Drawings
Using Proportions
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