Subtracting a negative from a negative, -4 - (-4)

The video tutorial explains how to subtract a negative number from another negative number. It begins with an example problem, demonstrating how to convert the subtraction into an addition problem by adding the opposite. The solution is further illustrated using a number line, showing that subtracting a negative is equivalent to moving in the positive direction, ultimately resulting in zero. The tutorial concludes with a summary of the example.

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