1 / 11

Warm-up: On page. Write each ratio in simplest form.

Warm-up: On page. Write each ratio in simplest form. 48 : 12 36 to 9 75 to 15 42 : 7 125 to 5. Rates. What is rate?. a ratio that compares two quantities measured in different units. You have 2 buckets of ice cream for 11 people 2 buckets of ice cream / 11 people. Example 1.

lenhardt
Télécharger la présentation

Warm-up: On page. Write each ratio in simplest form.

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Warm-up: On page. Write each ratio in simplest form. • 48 : 12 • 36 to 9 • 75 to 15 • 42 : 7 • 125 to 5

  2. Rates

  3. What is rate? • a ratio that compares two quantities measured in different units. • You have 2 buckets of ice cream for 11 people 2 buckets of ice cream/11 people

  4. Example 1 You drive 180 mi in 3 hrs 180 mi/3 hrs or 60 mi/hr

  5. What is a unit rate? HAS A DENOMINATOR OF 1! Divide numerator by denominator! Or you can reverse. The numerator can be one instead. It depends on how you set up your ratio.

  6. Example 2: My heart beats 150 times in 2 minutes. Rate: 150 heartbeats 2 minutes Unit Rate (Divide to get it): 150 ÷ 2 = 75 heartbeats per minute. 75 heartbeats = 1 minute

  7. Example 3: Find the Unit Rate Amy can read 88 pages in 4 hours. What is the unit rate? (How many pages can she read per hour?) 88 pages 22 pages / hour 4 hours 22 pages = 1 hour

  8. Example 4: Find the Unit Rate A box of crackers has 420 calories in 6 servings. Find the unit rate for 1 serving of crackers. 420 calories 70 calories / serving 6 servings 70 calories = 1 serving

  9. How do you compare unit prices? • Use division to find the unit prices (rate) of both products. • Smaller number (costs less) is the better value.

  10. Example 5 Juice is sold in two different sizes. A 48-fluid ounce bottle costs $2.07. A 32-fluid ounce bottle costs $1.64. Which is the better buy? $2.07 $0.04 per fl.oz. 0.043125 48 fl.oz. $1.64 $0.05 per fl.oz. 0.05125 32 fl.oz. The 48 fl.oz. bottle is the better value because it is $0.01 less per fluid ounce.

  11. Example 6 You can buy 3 bagels for $2.85 or 5 bagels for $4.00. Which is the better buy? $2.85 $0.95 / 1 bagel 3 bagels $4.00 $0.80 / 1 bagel 5 bagels The 5 bagels are the better value because it costs $0.15 less per bagel.

More Related