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Chapter 6-1 page 94 in your Workbooks. Arithmetic ways: 10 to 15 or 10 : 15 or 10 / 15. Algebra ways A to B A : B A / B, for B ≠ 0. Ratio = a comparison of two quantities by division. You can write a ratio in different ways. - PowerPoint PPT Presentation
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Chapter 6-1 page 94 in your Workbooks
Ratio = a comparison of two quantities by division. You can write a ratio in different ways
Arithmetic ways:
10 to 15 or
10 : 15 or
10 / 15
Algebra ways
A to B
A : B
A / B, for B ≠ 0
*How do you read a ratio? How do you set up a ratio from a word problem?
Rate: a ratio that compares quantities in different units.
Unit rate: a rate that has a denominator of 1
Ex: unit cost, gas mileage, and speed
Now lets try an Example!
Response Number
Have a job 40
No job 60
Total 100
A survey asks students whether they had after-school jobs. Write a ratio as a fraction in simplest form.
How do you set up this ratio?
A. Write a ratio in simplest form that would say: all students surveyed to students without jobs.
Response Number
Have a job 40
No job 60
Total 100
How do you set up this ratio
B. All students surveyed to students with jobs
Response Number
Have a job 40
No job 60
Total 100
Unit CostEx. 100 cards: price / number of cards
Ex. 50 cards:
Ex. 25 cards:
Convert 30 gal/min to cups/sec
30 gal/min =
Homework
Finish the Quick Check in the notes
Also page 367 and 368 in your workbooks
