Question

The number circle method is used for The sign-magnitude system 1's complement 2's complement All of the above

Answer 1

Signs and values of mathematical numbers are known as magnitude and the positive + or negative – values indicates the size of the numbers such as 4+8 or 8-4.

This presentation of numbers is called sign magnitude and here leftmost digit can be used to indicate the sign and the remaining digits are indicate the magnitude of value of the numbers.  

Sign-magnitude notation is the simplest and one of the most common methods of representing positive and negative numbers either side of zero, (0).

Thus negative numbers are obtained simply by changing the sign of the corresponding positive number as each positive or unsigned number will have a signed opposite, for example, +2 and -2, +10 and -10, etc.