Introduction:

The 1s complement is a binary number system concept used in computer science and digital electronics. It represents a method of expressing negative numbers in binary and performing binary arithmetic.



Understanding 1s Complement:



The 1s complement of a binary number is found by inverting all its bits.

This means changing each 0 to a 1 and each 1 to a 0.

Steps for Finding 1s Complement:



Take the binary number and flip each bit.

A bit with a value of 0 becomes 1, and a bit with a value of 1 becomes 0.

Example:



For the binary number 1101:

Invert each bit:

The first bit (1) becomes 0.

The second bit (1) becomes 0.

The third bit (0) becomes 1.

The fourth bit (1) becomes 0.

So, the 1s complement of 1101 is 0010.

Checking the Calculation:



Ensure each bit is correctly inverted.

Double-check that all the bits of the original number have been considered.

Key Points to Remember:



The 1s complement is a simple way to represent negative numbers in binary.

It's used in binary subtraction and other arithmetic operations.

Activity:



Practice finding the 1s complement for various binary numbers.

Compare the original and complemented numbers to understand the bit inversion process.