WELCOME TO CAHSEE

Week Five

NOTES- any slide with a green title should be written down in your notebook.

Lesson #9- Measurement and Geometry

1.1

Ratios and Proportions (10mins)

• Ratio- comparing two amounts.

1 hour60 minutes

• Proportions- two ratios that equal each other.

1 hour = 2 hours60 minutes x minutes

Example (write down the entire problem)

It takes you 3 hours to ride your bike from Downtown LA to Orange County. You ride the total 65 miles without stopping. What is your average speed in miles per hour?

3 hours = 1 hour65 miles x miles

3x= 65 3 3

x= 21.66, round off to the nearest tenth= 21.7 miles per hour

Steps

1) Ratios= units must match!3 hours = 1 hour65 miles x miles **** Hours on top and miles on bottom.

2) Cross multiply

3) Divide to find x.

Bootcamp Practice (15 mins)

Pages 77-78 you may write on.

Bootcamp PracticeRaise your hand if you need any help

Ask questions NOW, the Cahsee will be too late!

*Teacher will determine grouping (independent, pairs, etc.)

CHECK YOUR WORK- 2 mins Page 77

Problem # Answer

1 46.4 pounds

2 8976 feet3 151.2 feet per

second

CHECK YOUR WORK Page 78

Problem # Answer

1 128 ounces2 300,000 pounds3 6.9 gallons4 53.33 yards

(wide)5 8.8 miles per

hour

Lesson #10- Measurement and Geometry

1.3

Rates- 8 mins

Rate- type of ratio, amounts are related to each other.

Example #1

If you drove from Downtown LA to San Diego it would take your 2 hours for the 123 miles. What’s your car’s rate of speed?

123 ÷ 2= 61.5 miles per hour

Example #2

It took 7 workers 5 person-days each to complete a job. What was the total number of person-days needed to complete the job?

7x 5= 35 days

Bootcamp Practice (10 mins)

Pages 82- 83- you may write on.

Bootcamp PracticeRaise your hand if you need any help

Ask questions NOW, the Cahsee will be too late!

*Teacher will determine grouping (independent, pairs, etc.)

CHECK YOUR WORK- 2 mins Page 82

Problem # Answer

1 350 miles2 33 9 hours4 48 days

CHECK YOUR WORK- 3 mins Page 83

Problem #

Answer

1 14.3 mph

2 33.5 mph

3 6

4 181.8 miles

5 3/10 or 0.3

6 2.5

7 4.2

8 3.7

9 132

10 110

Exit Slip: (10 mins)

Get your assigned computer/ close notebook

Log-on/ www.achievedata.com/zoom/test

Use the test key from the CAHSEE BOOTCAMP file cabinet under Mrs. Kelley’s page

Exit Slip Name- CB Math Week Five Exit Slip (4 questions)

Time to Switch (1 minute stretch break before we start the next subject)

Reminders: (1 min)Sign-out (computer tracker) Last 3 Bootcamp Sessions11 school days till the CAHSEE!

Study over your notes nightly Room must be left spotless (no trash, I will check your desk before dismissal)