Untitled.notebook
November 30, 2012
Unit Rates
Vocabulary:
Rate ­ is a ratio that compares 2 quantities measured in different units
Unit Rate ­ the rate for one unit. Denominator is always 1.
Unit Price ­ a unit rate that gives the cost of 1. Examples:
Rate:
Unit Rate
Unit Price
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Untitled.notebook
November 30, 2012
Finding the Unit Rate:
Rules: Step 1: Set up a rate
Step 2: Divide the 1st quantity by the second quantity.
***Denominator goes on the outside***
Examples:
1. Find the unit rate for 420 Calories in 6 servings.
Step 1 420 Calories
6 Servings
Step 2
6 420
2. 66 pages read in 2 hours
3. $2.37 for 3 pounds of grapes
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Untitled.notebook
November 30, 2012
Using Unit Rates
Rule: Step 1: Set up a Ratio using the Unit Rate
Step 2: Multiply the Unit Rate by number referred too. Example:
A car travels 25 miles on 1 gallon of gas. How far can the car travel on 8 gallons of gas?
x8
Step 1
200 miles
8 gallons
25 miles
1 gallon
Step 2 Multiply by 8
x8
1. You earn $5.25 in 1 hour. How much do you earn in 5 hours?
2. You type 25 words in 1 minute. How many words can you type in 10 minutes?
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Untitled.notebook
November 30, 2012
Using Unit Prices to Compare
Step 1: Set up Rates
Step 2: Find the Unit Rate of each Rate
Step 3: Compare Yogurt: 6 ounces for $.68
32 ounces for $2.89
(Which is the better buy?)
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