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Tool: Clock Arithmetic on a 12-hour clock
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Go to: http://www.math.csusb.edu/.../mod_arith.html (opens a new window)
Description: On a 12-hour clock, there are only 12 numbers in the whole number system. However, every number has lots of different names. For example, the number before 1 is 0, so 12 = 0 on a 12-hour clock.
Technology Type: Java Applet 
Author: Susan Addington
Language: English 
Cost: Does not require payment for use

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Activity: Modular Arithmetic Lesson
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