Challenge: Taking One's and Two's Complements

Solve the challenge to check your understanding of calculating the one's and two's complements of a given decimal number.

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Given a decimal value, for example, –10, perform one’s complement and two’s complement on it without using a computer or calculator.


  • Convert the decimal value to binary using the signed 8-bit representation.

  • Perform one’s complement on the binary value by flipping all the bits.

  • Perform two’s complement on the binary value by first adding 1 to the one’s complement result.

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