students will be able to compute unit rates. 5-5 warm up divide. round answers to the nearest tenth....
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Students will be able to compute unit rates.5-5 Warm Up
Divide. Round answers to the nearest tenth.
1. 2.
3. 4.
5. Solve the proportion:
23.3 3.5
23.8 23.9
420 18
73 21
380 16
430 18
50(17) = 85p850 = 85p10 = p
Students will be able to compute unit rates.5-5
Homework Review
Tonights HW: 5.5 pg. 49
Students will be able to compute unit rates.5-5
Solve each proportion.
1. 2.n = 30 n = 164518
n12 = n
2469 =
Lesson Quiz
Students will be able to compute unit rates.5-5
Students will be able to compute unit rates in order to:
1. Determine the average speed of travel.
2. Get the best buy.
3. Examine beauty.
Students will be able to compute unit rates.5-5
Maximum Speed:1335 miles per 5 hours.
Rate: A comparison of two quantities that have different units.
Bugatti Veyron: Fastest car in the world
according to www.the supercars.org
1335 miles5 hours
Students will be able to compute unit rates.5-5
Maximum Speed:267 miles per 1 hours.
Unit Rate: Rate in which the second quantity is one.
Bugatti Veyron: Fastest car in the world
according to www.the supercars.org
267 miles1 hour
Students will be able to compute unit rates.5-5
In order to find the unit rate….
1335 miles5 hours
267 miles1 hour
Rate Unit Rate
divide the numerator by the denominator.
Students will be able to compute unit rates.5-5
How fast does the second fastest car go if it travels 771 miles per 3 hours?
257 miles per hour
Students will be able to compute unit rates.5-5
A driver is competing in a 500-mile auto race.
In the first 2 hours of the race, the driver travels 356 miles. What is the driver's average speed?
The driver's average speed is 178 mi/h.
=356 mi
2 h
= 178 mi/h Divide to find the unit rate.
Students will be able to compute unit rates.5-5Find Unit Rates
1. $60 for 15 hours.
2. 400 words in 10 minutes
3. 30 students for 3 computers.
4. 330 miles in 6 hours.
5. 800 meters in 25 seconds.
$4 per hour
40 words per minute
10 students per computer
55 minutes per hour
32 meters per second
Students will be able to compute unit rates.5-5 Unit Price
It’s all about bargain shopping
Unit price is a unit rate used to compare price per item.
Students will be able to compute unit rates.5-5
Which is the better buy?
Students will be able to compute unit rates.5-5
Jamie can buy a 15-oz jar of peanut butter for $2.19 or a 20-oz jar for $2.78. Which is the better buy?
Finding Unit Prices to Compare Costs
$2.1915
= $0.15
= $2.7820
$0.14
The better buy is the 20-oz jar for $2.78.
price for jarnumber of ounces
price for jarnumber of ounces
Divide the price by the number of ounces.
Students will be able to compute unit rates.5-5
Golf balls can be purchased in a 3-pack for $4.95 or a 12-pack for $18.95. Which is the better buy?
Divide the price by the number of balls.
price for packagenumber of balls
$4.953
= $1.65
price for packagenumber of balls
= $18.9512
$1.58
The better buy is the 12-pack for $18.95.
Students will be able to compute unit rates.5-5
Determine the better buy.
1) A half dozen carnations for $4.75 or a dozen
for $9.24
2) 15 collector cards for $2.75 or 80 for $13.00
3) 16 oz box of cereal for $3.49 or a 6 oz box of
cereal for $1.25
a dozen for $9.24
80 for $13
6 oz box for $1.25
Students will be able to compute unit rates.5-5
5. Bob typed 593 words in 4 minutes. How many words did Bob type per minute?
1. Jacob can buy a 32 oz bottle of BBQ sauce for $2.93 or a 36 oz bottle for $3.19. Which is the better buy?
2. John can buy a 8 pencils for $1.25 or a 12 pencils for $2.00. Which is the better buy?
3. Mary made $25.00 for working 7 hours at the mall. How much did Mary make per hour?
4. Lisa paid $158.00 for 3 pair of jeans. What did Lisa pay for each pair of jeans?
Try These!
36 oz
8 pencils
$3.57
$52.67
148.25 f