Paper Pool Project Descriptor

Paper Pool Project- Click here to access.

Online Paper Pool Interactive site

New Unit Comparing and Scaling

Welcome to our new unit focusing on ratios, rates, percents and proportions.

Investigation 1: Ways of Comparing: Ratios and Proportions

Investigation 1 focuses on different strategies for comparing quantities—using ratios, fractions, percents. Students learn what different types of comparative statements say about data given. They are asked to write comparative statements using ratios and differences that describe data. 

We have completed Investigation 1.1 -1.3 in the new Comparing and Scaling Book.
We focused on the ability to make comparisons of quantitative data. 
We focused on making comparisons through:
1. ratios
2. differences
3. percents
4. simplified ratios

Further we stressed the importance of making comparisons between part-to-part or part-to-whole.  

Quiz Keys

As you work on studying tonight, please take the time to look over these quiz keys while you look over your own copies of the Check-In and Partner Quizzes.

Stretching and Shrinking Quiz Keys

Come to tomorrow morning's study session (starts at 7:10am) with any questions you may have. Work hard and be ready!

Study Packet Answers

Click here to access the Study Packet- Question Bank Answers.

π Day Link

Great link on the explanation of π

Click here to access


Link to the Pi Day Site:
Click Here to Access

Get ready for next Wednesday's Unit Test!

As we prepare for our first math test if Term 3, here is the study guide for the Stretching and Shrinking Unit:

https://docs.google.com/a/yarmouthschools.org/document/d/1sgo88DXsl13ITTgZbw99bOI5CnY0F8mZXBE5pnfunp0/edit

...and here is a Quizlet to help you review the key vocabulary from the unit:

http://quizlet.com/38110969/stretching-and-shrinking-vocabulary-flash-cards/

Be prepared! Take a little time each day to study - do practice problems, review vocabulary, look over check-in an partner quizzes.

Scale Factor and Area Comparisons- Inv 3

Reviewing some notes....

Consider a rectangle 5cm by 2cm.

The area of the rectangle is 5cm × 2cm = 10cm², but what happens if the rectangle is enlarged?
We will start by multiplying the lengths by scale factor 2.
The rectangle is now 10cm by 4cm and the area is 40 cm².
The lengths were multiplied by 2, but the area has been multiplied by a scale factor of 4.

Now we will multiply the lengths in the original rectangle by scale factor 3.
The rectangle is now 15cm by 6cm and the area is 90 cm².
The lengths were multiplied by 3, but the area has been multiplied by a scale factor of 9.

Finally, we will try multiplying the lengths by scale factor 5.
The rectangle is now 25cm by 10cm and the area is 250 cm².
The lengths were multiplied by 5, but the area has been multiplied by a scale factor of 25.

See a pattern!?
When all the lengths are multiplied by x (the scale factor) , the areas are multiplied by x² (the scale factor squared).