Teacher resources and professional development across the curriculum

Teacher professional development and classroom resources across the curriculum

Monthly Update sign up
Mailing List signup
Search
Follow The Annenberg Learner on LinkedIn Follow The Annenberg Learner on Facebook Follow Annenberg Learner on Twitter
MENU
Learning Math Home
Number and Operations Session 2: Number Sets, Infinity, and Zero
 
Session2 Part A Part B Part C Homework
 
Glossary
number Site Map
Session 2 Materials:
Notes
Solutions
Video

Session 2, Part A:
Number Sets

In This Part: Relating Number Sets | Operations

Compare and contrast your diagram with the diagram below, which shows one way to illustrate the relationships among sets of numbers.   Note 1


 
 

Note 2

 

Problem A2

Solution  

Which operations can we do within the following sets: counting numbers, whole numbers, integers, irrational numbers and rational numbers (i.e., for each set decide under which operations is it closed)?


Stop!  Do the above problem before you proceed.  Use the tip text to help you solve the problem if you get stuck.
Select a set and try adding, subtracting, multiplying, or dividing random numbers from that set. What happens?   Close Tip

 

Problem A3

Solution  

a. 

Within each set, which operations require us to expand to a new set?

b. 

To go from one set to the next biggest, what new types of numbers do you need to include?



video thumbnail
 

Video Segment
In this video segment, Donna and Susan contemplate the relationships between different sets of numbers in the real number system. They discuss the operations and how different operations require them to expand the number sets they're using. Watch this segment after you've completed Problems A1-A3.

If you are using a VCR, you can find this segment on the session video approximately 4 minutes and 7 seconds after the Annenberg Media logo.

 

Next > Part B: The Size of Infinity

Learning Math Home | Number Home | Glossary | Map | ©

Session 2: Index | Notes | Solutions | Video

© Annenberg Foundation 2014. All rights reserved. Legal Policy