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Learning Math Home
Number and Operations Session 2: Number Sets, Infinity, and Zero
Session2 Part A Part B Part C Homework
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Session 2 Materials:

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


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



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


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

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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

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