What is the decimal equivalent of the 2's complement signed number 11011001?
A) 25
B) - 39
C) - 18
D) 29

Question

Quizplus · Accepted Answer

The binary number 11011001 in 2's complement represents a negative number because the leftmost bit (also known as the sign bit) is 1. To find its decimal equivalent, first, find its positive counterpart by inverting all bits and adding 1. Inverting 11011001 gives 00100110, and adding 1 gives 00100111, which is 39 in decimal. Therefore, the original number is -39.

What Is the Decimal Equivalent of the 2's Complement Signed