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Unit Rates and Proportional ReasoningPowerPoint Presentation

Unit Rates and Proportional Reasoning

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Unit Rates and Proportional Reasoning

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= $2.73 unit price • number of units = total price

COURSE 2 LESSON 5-2

Use the unit price to find the total price: 7 yd of ribbon at $.39 per yard.

$.39 • 7

The total price of 7 yd of ribbon is $2.73.

5-2

price

number of lb

$.89

3

$.30/lb

price

number of lb

$1.59

5

$.32/lb

COURSE 2 LESSON 5-2

Find each unit price. Then determine the better buy.

3 lb of potatoes for $.89

5 lb of potatoes for $1.59

Divide to find the unit price of each size.

Since $.30 < $.32, 3 lb of potatoes for $.89 is the better buy.

5-2

4.35 mi/h

$1.08/lb; $1.10/lb; 20 lb for $21.50.

COURSE 2 LESSON 5-2

1.It took Anthony 5 h 45 min to complete a 25-mi walkathon. What was his average speed in miles per hour? Round your answer to the nearest hundredth.

2.A 20-lb bag of dog food costs $21.50. A 30-lb bag of the same dog food costs $32.90. Find each unit price. Then determine the better buy.

5-2