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

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

    Alfinio Flores
    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.