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Pre-Algebra Rates and Unit Prices

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.

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Pre-Algebra Rates and Unit Prices

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  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. Vocabulary • Rate—Ratio that compares quantities with different kinds of units. • Unit Rate—Rate with a denominator of 1.

  5. Notes • To find unit rate, you divide by the denominator.

  6. Find each unit rate. Round to the nearest hundredth if necessary. • 300 tickets in 6 days • 220 miles in 8 gallons • 228 feet in 24 seconds • 440 miles in 8 hours

  7. 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.

  8. 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?

  9. Dish Detergent Prices • The table shows the various sizes and prices of dish detergent. • Which size is the better buy?

  10. Let’s Go Shopping! • The costs of different sizes of peanut butter are shown below. • Which jar costs the least per ounce?

  11. Let’s Go Shopping! • The costs of different sizes of orange juice are shown below. • Which container costs the least per ounce?

  12. Write each ratio as a fraction in simplest form. • 9 hours to 3 days • 18 weeks:1 year • 45 minutes to 2 hours • 2 feet to 10 inches • $9/hour to ¢/min

  13. Find each unit rate. • 10 miles/hour to feet per minute. • 3.5 quart/min to gallon/hour • 720 meter/day to meter/min. • 80 miles/hour to feet/second

  14. Class Work • Versatile sheet 18 and 19

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