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Coolmath Prealgebra
Signed Number (Integers) lesson 2 - Number Systems   (page 1 of 2)
---- This prealgebra lesson explains the different number systems: natural numbers, whole numbers, positive numbers, negative numbers, integers and real numbers.
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Graphing Calculator Scientific Calculator << a new window will open for these
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Up until now, you've been working with

The Natural Numbers:

number line with the natural number highlighted

Natural Numbers = { 1, 2, 3, 4, ... }
 

The Whole Numbers:

number line with the whole numbers highlighted

Whole Numbers = { 0, 1, 2, 3, 4, ... }
 

The Positive Numbers:

number line with the positive numbers highlighted

Positive Numbers = All numbers greater than 0

These are all of the natural numbers and all the numbers in between (including between 0 and 1).

number line with the positive numbers highlighted and examples of positive numbers pointed out
 

Continued on the next page

 The printing, distribution and/or downloading of these lessons is strictly prohibited.
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