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Tool: Color Chips - Subtraction
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Go to: http://nlvm.usu.edu/en/nav/frames_asid_162_g_2_t_1.html (opens a new window)
Description: This virtual manipulative uses plus-minus chips to demonstrate that subtracting values is the same as adding negative values.
Technology Type: Java Applet 
Guide: User's Guide (opens a new window)
Author: National Library of Virtual Manipulatives (Utah State University)
Language: English 
Cost: Does not require payment for use

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