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Objective Determine unit rates
Vocabulary Rate A ratio that compares two quantities with different kinds of units
Vocabulary Unit rate When a rate is simplified so that it has a denominator of 1 unit
Example 1 Find a Unit Rate Example 2 Find Unit Rates Example 3 Find Unit Rates Example 4 Choose the Best Buy
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 Notice: Time is in the denominator 2 2 Answer: Divide the numerator by the denominator Unit Rate always has a denominator of 1 1/4
SKATING Kyle skated 16 laps around the ice rink in 4 minutes. What is the average number of laps he skated per minute? Answer: 4 laps 1 minute 1/4
Write 440 miles in 8 hours as a unit rate in miles per hour. Write the rate as a fraction. Notice: Time is in the denominator 8 8 Divide the numerator by the denominator Answer: 2/4
Write 455 miles in 7 hours as a unit rate in miles per hour. Answer: 65 miles 1 hour 2/4
Find the unit price per can if it costs $3 for 6 cans of soda. Since it is money, round to the nearest hundredth if necessary. Write the rate as a fraction. Notice: Money is in the numerator 6 6 Divide the numerator by the denominator Answer: 3/4
Find the unit price per cookie if it costs $3 for one dozen cookies. Round to the nearest hundredth if necessary. Answer: $0. 25 1 cookie 3/4
cost ounce Total Cost $1. 28 $1. 92 $2. 56 96 oz The costs of different sizes of orange juice are shown in the table. Which container costs the least per ounce? Amount 16 oz 32 oz 64 oz $3. 36 Must find the unit rate of each item $1. 28 16 oz Remember: Money is always in the numerator $0. 08 1 oz Write the rate as a fraction. Divide the numerator by the denominator 4/4
16 oz = $0. 08 cost ounce Amount 16 oz 32 oz 64 oz Total Cost $1. 28 $1. 92 $2. 56 96 oz $3. 36 Must find the unit rate of each item $1. 92 32 oz Remember: Money is always in the numerator $0. 06 1 oz Write the rate as a fraction. Divide the numerator by the denominator 4/4
16 oz = $0. 08 32 oz = $0. 06 cost ounce Amount 16 oz 32 oz 64 oz Total Cost $1. 28 $1. 92 $2. 56 96 oz $3. 36 Must find the unit rate of each item $2. 56 64 oz Remember: Money is always in the numerator $0. 04 1 oz Write the rate as a fraction. Divide the numerator by the denominator 4/4
16 oz = $0. 08 32 oz = $0. 06 64 oz = $0. 04 cost ounce Amount 16 oz 32 oz 64 oz Total Cost $1. 28 $1. 92 $2. 56 96 oz $4. 80 Must find the unit rate of each item $4. 80 96 oz Remember: Money is always in the numerator $0. 05 1 oz Write the rate as a fraction. Divide the numerator by the denominator 4/4
16 oz = $0. 08 32 oz = $0. 06 64 oz = $0. 04 96 oz = $0. 05 Amount 16 oz 32 oz 64 oz Total Cost $1. 28 $1. 92 $2. 56 96 oz $4. 80 Which container costs the least per ounce? Compare the cost per ounce of each size and identify the smallest price Answer based on what the question is asking Answer: The 64 -ounce container 4/4
* The costs of different sizes of bottles of laundry detergent are shown below. Which bottle costs the least per ounce? Amount 16 oz 32 oz 64 oz Total Cost $3. 12 $5. 04 $7. 04 96 oz $11. 52 Answer: 64 -ounce bottle 4/4
Assignment Lesson 7: 2 Rates 4 - 21 All
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fc062ff91c79b9944968d685260361e7.ppt