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Subtraction of Positive and Negative Numbers: The Difference and Completion Approaches with Chips

Alfinio Flores 

August 2008, Volume 14, Issue 1, Page 21

Abstract:
An illustration of how the difference and completion (or missing addend) interpretations of subtraction may be used with chips of two colors to understand subtracting negative and positive numbers. Several visual representations are provided.

Keywords:
Article
Addition and Subtraction
Grades 6-8
Conceptual Development
Teacher
Manipulatives
Skill and Fluency
Reasoning and Proof
Representation