Convert 10 010 011 384 to a Signed Binary in One's (1's) Complement Representation

How to convert decimal number 10 010 011 384(10) to a signed binary in one's (1's) complement representation

What are the steps to convert decimal number
10 010 011 384 to a signed binary in one's (1's) complement representation?

  • A signed integer, written in base ten, or a decimal system number, is a number written using the digits 0 through 9 and the sign, which can be positive (+) or negative (-). If positive, the sign is usually not written. A number written in base two, or binary, is a number written using only the digits 0 and 1.

1. Divide the number repeatedly by 2:

Keep track of each remainder.

Stop when you get a quotient that is equal to zero.


  • division = quotient + remainder;
  • 10 010 011 384 ÷ 2 = 5 005 005 692 + 0;
  • 5 005 005 692 ÷ 2 = 2 502 502 846 + 0;
  • 2 502 502 846 ÷ 2 = 1 251 251 423 + 0;
  • 1 251 251 423 ÷ 2 = 625 625 711 + 1;
  • 625 625 711 ÷ 2 = 312 812 855 + 1;
  • 312 812 855 ÷ 2 = 156 406 427 + 1;
  • 156 406 427 ÷ 2 = 78 203 213 + 1;
  • 78 203 213 ÷ 2 = 39 101 606 + 1;
  • 39 101 606 ÷ 2 = 19 550 803 + 0;
  • 19 550 803 ÷ 2 = 9 775 401 + 1;
  • 9 775 401 ÷ 2 = 4 887 700 + 1;
  • 4 887 700 ÷ 2 = 2 443 850 + 0;
  • 2 443 850 ÷ 2 = 1 221 925 + 0;
  • 1 221 925 ÷ 2 = 610 962 + 1;
  • 610 962 ÷ 2 = 305 481 + 0;
  • 305 481 ÷ 2 = 152 740 + 1;
  • 152 740 ÷ 2 = 76 370 + 0;
  • 76 370 ÷ 2 = 38 185 + 0;
  • 38 185 ÷ 2 = 19 092 + 1;
  • 19 092 ÷ 2 = 9 546 + 0;
  • 9 546 ÷ 2 = 4 773 + 0;
  • 4 773 ÷ 2 = 2 386 + 1;
  • 2 386 ÷ 2 = 1 193 + 0;
  • 1 193 ÷ 2 = 596 + 1;
  • 596 ÷ 2 = 298 + 0;
  • 298 ÷ 2 = 149 + 0;
  • 149 ÷ 2 = 74 + 1;
  • 74 ÷ 2 = 37 + 0;
  • 37 ÷ 2 = 18 + 1;
  • 18 ÷ 2 = 9 + 0;
  • 9 ÷ 2 = 4 + 1;
  • 4 ÷ 2 = 2 + 0;
  • 2 ÷ 2 = 1 + 0;
  • 1 ÷ 2 = 0 + 1;

2. Construct the base 2 representation of the positive number:

Take all the remainders starting from the bottom of the list constructed above.

10 010 011 384(10) = 10 0101 0100 1010 0100 1010 0110 1111 1000(2)

3. Determine the signed binary number bit length:

  • The base 2 number's actual length, in bits: 34.

  • A signed binary's bit length must be equal to a power of 2, as of:
  • 21 = 2; 22 = 4; 23 = 8; 24 = 16; 25 = 32; 26 = 64; ...
  • The first bit (the leftmost) indicates the sign:
  • 0 = positive integer number, 1 = negative integer number

The least number that is:

1) a power of 2

2) and is larger than the actual length, 34,

3) so that the first bit (leftmost) could be zero
(we deal with a positive number at this moment)

=== is: 64.


4. Get the positive binary computer representation on 64 bits (8 Bytes):

If needed, add extra 0s in front (to the left) of the base 2 number, up to the required length, 64.


Decimal Number 10 010 011 384(10) converted to signed binary in one's complement representation:

10 010 011 384(10) = 0000 0000 0000 0000 0000 0000 0000 0010 0101 0100 1010 0100 1010 0110 1111 1000

Spaces were used to group digits: for binary, by 4, for decimal, by 3.

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How to convert signed integers from the decimal system to signed binary in one's complement representation

Follow the steps below to convert a signed base 10 integer number to signed binary in one's complement representation:

  • 1. If the number to be converted is negative, start with the positive version of the number.
  • 2. Divide repeatedly by 2 the positive representation of the integer number that is to be converted to binary, keeping track of each remainder, until we get a quotient that is equal to ZERO.
  • 3. Construct the base 2 representation of the positive number, by taking all the remainders starting from the bottom of the list constructed above. Thus, the last remainder of the divisions becomes the first symbol (the leftmost) of the base two number, while the first remainder becomes the last symbol (the rightmost).
  • 4. Binary numbers represented in computer language must have 4, 8, 16, 32, 64, ... bit length (a power of 2) - if needed, fill in '0' bits in front (to the left) of the base 2 number calculated above, up to the right length; this way the first bit (leftmost) will always be '0', correctly representing a positive number.
  • 5. To get the negative integer number representation in signed binary one's complement, replace all '0' bits with '1's and all '1' bits with '0's.

Example: convert the negative number -49 from the decimal system (base ten) to signed binary one's complement:

  • 1. Start with the positive version of the number: |-49| = 49
  • 2. Divide repeatedly 49 by 2, keeping track of each remainder:
    • division = quotient + remainder
    • 49 ÷ 2 = 24 + 1
    • 24 ÷ 2 = 12 + 0
    • 12 ÷ 2 = 6 + 0
    • 6 ÷ 2 = 3 + 0
    • 3 ÷ 2 = 1 + 1
    • 1 ÷ 2 = 0 + 1
  • 3. Construct the base 2 representation of the positive number, by taking all the remainders starting from the bottom of the list constructed above:
    49(10) = 11 0001(2)
  • 4. The actual bit length of base 2 representation is 6, so the positive binary computer representation of a signed binary will take in this case 8 bits (the least power of 2 that is larger than 6) - add '0's in front of the base 2 number, up to the required length:
    49(10) = 0011 0001(2)
  • 5. To get the negative integer number representation in signed binary one's complement, replace all '0' bits with '1's and all '1' bits with '0's:
    -49(10) = 1100 1110
  • Number -49(10), signed integer, converted from the decimal system (base 10) to signed binary in one's complement representation = 1100 1110