TELL ME SOMETHIN’ GOOD!

Strategy #3: Know Your Place!

If the solution seems straight-forward halfway through the test or beyond, you’re not thinking about the problem correctly!

Trashketball

1) Divide class into two teams2) One whiteboard, marker and

eraser per team3) Correct responses earn your

team the opportunity to shoot a trashket

4) Highest trashket total wins

Activity Predictions1) Write your ratio of trashkets to

misses2) Write your ratio of trashkets to

total shots3) Write your ratio of misses to

total shots4) If your scores continued at this

rate, approximately how many misses would be associated with 12 trashkets?

5) If your scores continued at this rate, approximately how many trashkets would you make out of 30 shots?

Predictions Actual

Lesson #3: Ratios and Proportions

What is a ratio?Indication of relative amounts for two quantities

What is a proportion?An equation that sets two ratios equal

Similar triangles have proportional corresponding side lengths

Example 1

For every 40 games a baseball team plays, it loses 12 games. What is the ratio of the team’s losses to wins?a. 3:10b. 7:10c. 3:7d. 7:3e. 10:3

Example 2

In a particular class, the ratio of boys to girls is 2:3.a. If there are 8 boys, then how many girls are there?

b. If there are 9 girls, then how many students are there?

c. If there are 25 students, then how many girls are there?

Example 3

At a particular elementary school, the ratio of teachers to students is 1:22. a. How many teachers are present on campus if there are

660 students?

b. How many people are present on campus (students and teachers) if there are 10 teachers?

c. How many teachers are present on campus if there are 460 people on campus?

Example 4

If a $200 prize is divided up among three people in a 1:4:5 ratio, then how much does each person receive?

Example 5

A bird can fly 420 miles in one day if it flies continuously. At this rate, how many miles can the bird fly in 14 hours?

Ratio/Proportion Problems from PT #1

2-85-177-5, 15

Very Challenging:2-20

Activity Actual Calculations

1) Write your ratio of baskets to misses2) Write your ratio of baskets to total shots3) Write your ratio of misses to total shots4) If your scores continued at this rate,

approximately how many misses would be associated with 12 baskets?

5) If your scores continued at this rate, approximately how many baskets you would make out of 30 shots?

Work Time

1) Ratios and Proportions Practice Problems (collected before you leave today)

2) ProProfs Pratice Problems on a topic of your choice

3) Explore the app you will be presenting on next week