Upload
dong
View
31
Download
6
Embed Size (px)
DESCRIPTION
Pre-Algebra Rates and Unit Prices. What Are You Learning?. I CAN find unit rate and unit price. Why Do You Need To Know This?. Rates are important because they are used to compare quantities with different units. - PowerPoint PPT Presentation
Citation preview
1
Pre-AlgebraRates and Unit Prices
2
What Are You Learning?
I CAN find unit rate and unit price.
3
Why Do You Need To Know This?Rates are important because
they are used to compare quantities with different units.
Rates can be used in a variety of ways and can be found many places in the real world.
4
VocabularyRate—Ratio that compares
quantities with different kinds of units.
Unit Rate—Rate with a denominator of 1.
5
Ratio Unit Rate Abbreviation Name
# of miles/1hour
Miles per hour Mi/h or mph Speed
# of miles/1 gallon
Miles per gallon Mi/gal or mpg Gas Mileage
# of dollars/1 pound
Price per Pound Dollars/lb Unit Price
# of dollars/1 hour
Dollars per hour
Dollars/h Hourly Wage
6
Notes
To find unit rate, you divide by the denominator.
7
Find each unit rate. Round to the nearest hundredth if necessary.a. 300 tickets in 6 days
b. 220 miles in 8 gallons
c. 228 feet in 24 seconds
d. 440 miles in 8 hours
8
How Much Does It Cost? Find the unit price per orange if it costs $2
for 6 oranges.
Find the unit price per can if it costs $3 for 6 cans of soda.
9
Let’s Go Shopping!!You can buy a package of 100
index cards for $2.70, or 50 cards for $1.30, or 25 cards for $.75.
Which size has the lowest unit price?
10
Dish Detergent Prices The table shows the
various sizes and prices of dish detergent.
Which size is the better buy?
Size Volume (fl oz)
Price
Mini 12 $1.20
Family 28 $2.24
Economy 40 $3.60
11
Let’s Go Shopping! The costs of different
sizes of peanut butter are shown below.
Which jar costs the least per ounce?
Size Price
12 oz $2.49
40 oz $5.30
80 oz $10.89
12
Let’s Go Shopping! The costs of different
sizes of orange juice are shown below.
Which container costs the least per ounce?
Size Volume (fl oz)
16 oz $1.28
32 oz $1.92
64 oz $2.56
96 oz $3.36
13
Write each ratio as a fraction in simplest form.a. 9 hours to 3 days
b. 18 weeks:1 year
c. 45 minutes to 2 hours
d. 2 feet to 10 inches
e. $9/hour to ¢/min
14
Find each unit rate. a. 10 miles/hour to feet per minute.
b. 3.5 quart/min to gallon/hour
c. 720 meter/day to meter/min.
d. 80 miles/hour to feet/second
15
Class Work Versatile sheet 18 and 19