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Ratio and Rates

Ratio and Rates. 3.8. Objective- To compare ratios and rates. Ratio -. A comparison of two whole numbers in the same units. 5 girls to 7 boys. 4 Possible Ways to Write a Ratio. sometimes. 5 out of 12. as in 5 girls out of 12 students. Simplify each ratio below:. 1). 4). 2). 5).

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Ratio and Rates

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  1. Ratio and Rates 3.8

  2. Objective- To compare ratios and rates. Ratio - A comparison of two whole numbers in the same units. 5 girls to 7 boys 4 Possible Ways to Write a Ratio sometimes . . . 5 out of 12 as in 5 girls out of 12 students

  3. Simplify each ratio below: 1) 4) 2) 5) 3) 6)

  4. Ratio Rate - a comparison of two whole numbers in the same units. - a comparison of a number to one in different units. - always written as a single number on a per unit basis. - always written as two numbers. - never write the units. - always write the units. - reduce to simplify. - divide to simplify.

  5. Find the unit rate: 1) 84 students in 4 classrooms 2) $30 for 8 lunches 3) 15,000 cars sold by 2000 dealers

  6. Reciprocal Rates 8 oranges for 2 dollars Unit Rate Reciprocal Rate $87.50 for 5 tickets Unit Rate Reciprocal Rate

  7. The actual distance between North Chicago and Waukegan is 4 mi. What is the distance between these two locations on the map? Write the scale as a fraction. Let x be the map distance. 18x = 4 Use cross products to solve. x ≈ 0.2 The distance on the map is about 0.2 in.

  8. Rate Multiplication Your heart beats 70 beats/min. How many beats per hour is this? Start Finish Rates

  9. Rate Multiplication Joe reads 12 pages per day. How long would it take him to read a 684 page book? Start Finish Rates

  10. Rate Multiplication (very challenging) The world record for the 100 yard dash is 9.4 seconds. How fast is this in miles/hr? Start Finish Rates

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