Back
What Does it Mean to Subtract a Negative Number?
> ... Math > Addition and Subtraction > What Does it Mean to Subtract a Negative Number?

Subtracting a negative number is the same as adding a positive number.

Example: \(-5 - (-2) = -3\)

SubtractNegativeNumber.svg


Subtract a negative number

Video Source (03:34 mins) | Transcript

Additional Resources

Practice Problems

Evaluate the following expression:
  1. \(6 - (- 3) = ?\) (
    Solution
    x
    Solution: \(9\)
    Details:
    Let’s explore the patterns:

    \(6 - (1) = 5\)

    \(6 - (0) = 6\)

    \(6 - (-1) = 7\)

    \(6 - (-2) = 8\)

    \(\color{red} 6 - (-3) = 9\)

    Subtracting a negative number from a positive number result in a positive answer. This problem can also be rewritten as \(6 + 3 = 9\).
    )
  2. \(4 - (- 4) = ?\) (
    Solution
    x
    Solution: \(8\)
    Details:
    Let’s explore the patterns:

    4 \(- (1) = 3\)

    4 \(- (0) = 4\)

    4 \(- (-1) = 5\)

    4 \(- (-2) = 6\)

    4 \(- (-3) = 7\)

    \(\color{red} 4 - (-4) = 8\)

    Subtracting a negative number from a positive number results in a positive answer. This problem can also be rewritten as \(4 + 4 = 8\).
    )
  3. \(3 - (- 5) = ?\) (
    Video Solution
    x
    Solution: 8
    Details:

    (Video Source | Transcript)
    )
  4. \(4 - (- 8) = ?\) (
    Video Solution
    x
    Solution: 12
    Details:

    (Video Source | Transcript)
    )
  5. \(10 - (- 19) = ?\) (
    Solution
    x
    Solution:
    29
    )
  6. \(48 - (- 16) = ?\) (
    Solution
    x
    Solution:
    64
    )

Need More Help?

  1. Study other Math Lessons in the Resource Center.
  2. Visit the Online Tutoring Resources in the Resource Center.
  3. Contact your Instructor.
  4. If you still need help, Schedule a Tutor.