# Signed binary two's complement number 1111 1110 0101 1010 converted to decimal system (base ten) signed integer

• 215

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1
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## Latest binary numbers in two's complement representation converted to signed integers in decimal system (base ten)

 1111 1110 0101 1010 = -422 Jan 26 18:38 UTC (GMT) 0100 0000 0000 0000 0000 0101 1111 1100 0000 0000 0000 0000 0000 0000 0000 0010 = 4,611,692,598,317,285,378 Jan 26 18:38 UTC (GMT) 0000 0000 0000 0100 0010 0001 1110 1101 = 270,829 Jan 26 18:37 UTC (GMT) 0100 1010 0100 0101 0100 0101 0100 1100 = 1,246,053,708 Jan 26 18:37 UTC (GMT) 1000 0011 = -125 Jan 26 18:36 UTC (GMT) 1011 0011 0011 0011 = -19,661 Jan 26 18:35 UTC (GMT) 1100 1011 1111 0110 = -13,322 Jan 26 18:35 UTC (GMT) 0000 0000 0001 1000 0000 0000 0000 0001 = 1,572,865 Jan 26 18:34 UTC (GMT) 0000 0000 0000 0000 0000 0000 0000 0001 1111 1111 1111 1111 1111 1111 1111 1111 = 8,589,934,591 Jan 26 18:33 UTC (GMT) 0000 0110 0110 1100 = 1,644 Jan 26 18:33 UTC (GMT) 0100 0010 0110 1001 = 17,001 Jan 26 18:32 UTC (GMT) 1101 1111 0010 1010 = -8,406 Jan 26 18:31 UTC (GMT) 0010 0010 0001 1110 = 8,734 Jan 26 18:29 UTC (GMT) All the converted signed binary two's complement numbers

## How to convert signed binary numbers in two's complement representation from binary system to decimal

### To understand how to convert a signed binary number in two's complement representation from the binary system to decimal (base ten), the easiest way is to do it by an example - convert binary, 1101 1110, to base ten:

• In a signed binary two's complement, first bit (leftmost) indicates the sign, 1 = negative, 0 = positive. The first bit is 1, so our number is negative.
• Get the signed binary representation in one's complement, subtract 1 from the initial number:
1101 1110 - 1 = 1101 1101
• Get the binary representation of the positive number, flip all the bits in the signed binary one's complement representation (reversing the digits) - replace the bits set on 1 with 0s and the bits on 0 with 1s:
!(1101 1101) = 0010 0010
• Write bellow the positive binary number representation in base two, and above each bit that makes up the binary number write the corresponding power of 2 (numeral base) that its place value represents, starting with zero, from the right of the number (rightmost bit), walking to the left of the number, increasing each corresonding power of 2 by exactly one unit:
•  powers of 2: 7 6 5 4 3 2 1 0 digits: 0 0 1 0 0 0 1 0
• Build the representation of the positive number in base 10, by taking each digit of the binary number, multiplying it by the corresponding power of 2 and then adding all the terms up: