Convert 11 000 012 323 to a Signed Binary in One's (1's) Complement Representation

How to convert decimal number 11 000 012 323(10) to a signed binary in one's (1's) complement representation

What are the steps to convert decimal number
11 000 012 323 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;
  • 11 000 012 323 ÷ 2 = 5 500 006 161 + 1;
  • 5 500 006 161 ÷ 2 = 2 750 003 080 + 1;
  • 2 750 003 080 ÷ 2 = 1 375 001 540 + 0;
  • 1 375 001 540 ÷ 2 = 687 500 770 + 0;
  • 687 500 770 ÷ 2 = 343 750 385 + 0;
  • 343 750 385 ÷ 2 = 171 875 192 + 1;
  • 171 875 192 ÷ 2 = 85 937 596 + 0;
  • 85 937 596 ÷ 2 = 42 968 798 + 0;
  • 42 968 798 ÷ 2 = 21 484 399 + 0;
  • 21 484 399 ÷ 2 = 10 742 199 + 1;
  • 10 742 199 ÷ 2 = 5 371 099 + 1;
  • 5 371 099 ÷ 2 = 2 685 549 + 1;
  • 2 685 549 ÷ 2 = 1 342 774 + 1;
  • 1 342 774 ÷ 2 = 671 387 + 0;
  • 671 387 ÷ 2 = 335 693 + 1;
  • 335 693 ÷ 2 = 167 846 + 1;
  • 167 846 ÷ 2 = 83 923 + 0;
  • 83 923 ÷ 2 = 41 961 + 1;
  • 41 961 ÷ 2 = 20 980 + 1;
  • 20 980 ÷ 2 = 10 490 + 0;
  • 10 490 ÷ 2 = 5 245 + 0;
  • 5 245 ÷ 2 = 2 622 + 1;
  • 2 622 ÷ 2 = 1 311 + 0;
  • 1 311 ÷ 2 = 655 + 1;
  • 655 ÷ 2 = 327 + 1;
  • 327 ÷ 2 = 163 + 1;
  • 163 ÷ 2 = 81 + 1;
  • 81 ÷ 2 = 40 + 1;
  • 40 ÷ 2 = 20 + 0;
  • 20 ÷ 2 = 10 + 0;
  • 10 ÷ 2 = 5 + 0;
  • 5 ÷ 2 = 2 + 1;
  • 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.

11 000 012 323(10) = 10 1000 1111 1010 0110 1101 1110 0010 0011(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 11 000 012 323(10) converted to signed binary in one's complement representation:

11 000 012 323(10) = 0000 0000 0000 0000 0000 0000 0000 0010 1000 1111 1010 0110 1101 1110 0010 0011

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