One's Complement: Integer ↗ Binary: 1 100 110 111 011 147 Convert the Integer Number to a Signed Binary in One's Complement Representation. Write the Base Ten Decimal System Number as a Binary Code (Written in Base Two)

Signed integer number 1 100 110 111 011 147(10) converted and written as a signed binary in one's complement representation (base 2) = ?

1. Divide the number repeatedly by 2:

Keep track of each remainder.

We stop when we get a quotient that is equal to zero.


  • division = quotient + remainder;
  • 1 100 110 111 011 147 ÷ 2 = 550 055 055 505 573 + 1;
  • 550 055 055 505 573 ÷ 2 = 275 027 527 752 786 + 1;
  • 275 027 527 752 786 ÷ 2 = 137 513 763 876 393 + 0;
  • 137 513 763 876 393 ÷ 2 = 68 756 881 938 196 + 1;
  • 68 756 881 938 196 ÷ 2 = 34 378 440 969 098 + 0;
  • 34 378 440 969 098 ÷ 2 = 17 189 220 484 549 + 0;
  • 17 189 220 484 549 ÷ 2 = 8 594 610 242 274 + 1;
  • 8 594 610 242 274 ÷ 2 = 4 297 305 121 137 + 0;
  • 4 297 305 121 137 ÷ 2 = 2 148 652 560 568 + 1;
  • 2 148 652 560 568 ÷ 2 = 1 074 326 280 284 + 0;
  • 1 074 326 280 284 ÷ 2 = 537 163 140 142 + 0;
  • 537 163 140 142 ÷ 2 = 268 581 570 071 + 0;
  • 268 581 570 071 ÷ 2 = 134 290 785 035 + 1;
  • 134 290 785 035 ÷ 2 = 67 145 392 517 + 1;
  • 67 145 392 517 ÷ 2 = 33 572 696 258 + 1;
  • 33 572 696 258 ÷ 2 = 16 786 348 129 + 0;
  • 16 786 348 129 ÷ 2 = 8 393 174 064 + 1;
  • 8 393 174 064 ÷ 2 = 4 196 587 032 + 0;
  • 4 196 587 032 ÷ 2 = 2 098 293 516 + 0;
  • 2 098 293 516 ÷ 2 = 1 049 146 758 + 0;
  • 1 049 146 758 ÷ 2 = 524 573 379 + 0;
  • 524 573 379 ÷ 2 = 262 286 689 + 1;
  • 262 286 689 ÷ 2 = 131 143 344 + 1;
  • 131 143 344 ÷ 2 = 65 571 672 + 0;
  • 65 571 672 ÷ 2 = 32 785 836 + 0;
  • 32 785 836 ÷ 2 = 16 392 918 + 0;
  • 16 392 918 ÷ 2 = 8 196 459 + 0;
  • 8 196 459 ÷ 2 = 4 098 229 + 1;
  • 4 098 229 ÷ 2 = 2 049 114 + 1;
  • 2 049 114 ÷ 2 = 1 024 557 + 0;
  • 1 024 557 ÷ 2 = 512 278 + 1;
  • 512 278 ÷ 2 = 256 139 + 0;
  • 256 139 ÷ 2 = 128 069 + 1;
  • 128 069 ÷ 2 = 64 034 + 1;
  • 64 034 ÷ 2 = 32 017 + 0;
  • 32 017 ÷ 2 = 16 008 + 1;
  • 16 008 ÷ 2 = 8 004 + 0;
  • 8 004 ÷ 2 = 4 002 + 0;
  • 4 002 ÷ 2 = 2 001 + 0;
  • 2 001 ÷ 2 = 1 000 + 1;
  • 1 000 ÷ 2 = 500 + 0;
  • 500 ÷ 2 = 250 + 0;
  • 250 ÷ 2 = 125 + 0;
  • 125 ÷ 2 = 62 + 1;
  • 62 ÷ 2 = 31 + 0;
  • 31 ÷ 2 = 15 + 1;
  • 15 ÷ 2 = 7 + 1;
  • 7 ÷ 2 = 3 + 1;
  • 3 ÷ 2 = 1 + 1;
  • 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.


1 100 110 111 011 147(10) = 11 1110 1000 1000 1011 0101 1000 0110 0001 0111 0001 0100 1011(2)


3. Determine the signed binary number bit length:

The base 2 number's actual length, in bits: 50.


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, 50,

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.


Number 1 100 110 111 011 147(10), a signed integer number (with sign), converted from decimal system (from base 10) and written as a signed binary in one's complement representation:

1 100 110 111 011 147(10) = 0000 0000 0000 0011 1110 1000 1000 1011 0101 1000 0110 0001 0111 0001 0100 1011

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