STEPS FOR BINARY SUBTRACTION USING 1’s and 2’s Complement Method

  1. Make equal no of bits in both minuend and subtrahend
  2. Calculate
    • 1’s Complement of subtrahend if you’re performing subtracting using 1’s complement method.
    • 2’s complement of the subtrahend if you’re performing subtraction using 2’s complement method
      (Also view how to calculate 1’s and 2’s complements here.)
  3. Add result of step 2 with minuend to calculate the last sum.
  4. Inspect the last sum for carrying or overflow bit with the following conditions to calculate answer.
Image: datasagar.com

Example for further understanding.

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