Two's Complement: Integer ↗ Binary: 1 100 000 110 010 096 Convert the Integer Number to a Signed Binary in Two's Complement Representation. Write the Base Ten Decimal System Number as a Binary Code (Written in Base Two)

Signed integer number 1 100 000 110 010 096(10) converted and written as a signed binary in two'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;
  • 1 100 000 110 010 096 ÷ 2 = 550 000 055 005 048 + 0;
  • 550 000 055 005 048 ÷ 2 = 275 000 027 502 524 + 0;
  • 275 000 027 502 524 ÷ 2 = 137 500 013 751 262 + 0;
  • 137 500 013 751 262 ÷ 2 = 68 750 006 875 631 + 0;
  • 68 750 006 875 631 ÷ 2 = 34 375 003 437 815 + 1;
  • 34 375 003 437 815 ÷ 2 = 17 187 501 718 907 + 1;
  • 17 187 501 718 907 ÷ 2 = 8 593 750 859 453 + 1;
  • 8 593 750 859 453 ÷ 2 = 4 296 875 429 726 + 1;
  • 4 296 875 429 726 ÷ 2 = 2 148 437 714 863 + 0;
  • 2 148 437 714 863 ÷ 2 = 1 074 218 857 431 + 1;
  • 1 074 218 857 431 ÷ 2 = 537 109 428 715 + 1;
  • 537 109 428 715 ÷ 2 = 268 554 714 357 + 1;
  • 268 554 714 357 ÷ 2 = 134 277 357 178 + 1;
  • 134 277 357 178 ÷ 2 = 67 138 678 589 + 0;
  • 67 138 678 589 ÷ 2 = 33 569 339 294 + 1;
  • 33 569 339 294 ÷ 2 = 16 784 669 647 + 0;
  • 16 784 669 647 ÷ 2 = 8 392 334 823 + 1;
  • 8 392 334 823 ÷ 2 = 4 196 167 411 + 1;
  • 4 196 167 411 ÷ 2 = 2 098 083 705 + 1;
  • 2 098 083 705 ÷ 2 = 1 049 041 852 + 1;
  • 1 049 041 852 ÷ 2 = 524 520 926 + 0;
  • 524 520 926 ÷ 2 = 262 260 463 + 0;
  • 262 260 463 ÷ 2 = 131 130 231 + 1;
  • 131 130 231 ÷ 2 = 65 565 115 + 1;
  • 65 565 115 ÷ 2 = 32 782 557 + 1;
  • 32 782 557 ÷ 2 = 16 391 278 + 1;
  • 16 391 278 ÷ 2 = 8 195 639 + 0;
  • 8 195 639 ÷ 2 = 4 097 819 + 1;
  • 4 097 819 ÷ 2 = 2 048 909 + 1;
  • 2 048 909 ÷ 2 = 1 024 454 + 1;
  • 1 024 454 ÷ 2 = 512 227 + 0;
  • 512 227 ÷ 2 = 256 113 + 1;
  • 256 113 ÷ 2 = 128 056 + 1;
  • 128 056 ÷ 2 = 64 028 + 0;
  • 64 028 ÷ 2 = 32 014 + 0;
  • 32 014 ÷ 2 = 16 007 + 0;
  • 16 007 ÷ 2 = 8 003 + 1;
  • 8 003 ÷ 2 = 4 001 + 1;
  • 4 001 ÷ 2 = 2 000 + 1;
  • 2 000 ÷ 2 = 1 000 + 0;
  • 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.


1 100 000 110 010 096(10) = 11 1110 1000 0111 0001 1011 1011 1100 1111 0101 1110 1111 0000(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 1 100 000 110 010 096(10), a signed integer number (with sign), converted from decimal system (from base 10) and written as a signed binary in two's complement representation:

1 100 000 110 010 096(10) = 0000 0000 0000 0011 1110 1000 0111 0001 1011 1011 1100 1111 0101 1110 1111 0000

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

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

Follow the steps below to convert a signed base 10 integer number to signed binary in two'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, keeping track of each remainder, until we get a quotient that is 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, add extra bits on 0 in front (to the left) of the base 2 number above, up to the required length, so that the first bit (the leftmost) will 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 1s and all 1 bits with 0s (reversing the digits).
  • 6. To get the negative integer number, in signed binary two's complement representation, add 1 to the number above.

Example: convert the negative number -60 from the decimal system (base ten) to signed binary in two's complement:

  • 1. Start with the positive version of the number: |-60| = 60
  • 2. Divide repeatedly 60 by 2, keeping track of each remainder:
    • division = quotient + remainder
    • 60 ÷ 2 = 30 + 0
    • 30 ÷ 2 = 15 + 0
    • 15 ÷ 2 = 7 + 1
    • 7 ÷ 2 = 3 + 1
    • 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:
    60(10) = 11 1100(2)
  • 4. Bit length of base 2 representation number is 6, so the positive binary computer representation of a signed binary will take in this particular case 8 bits (the least power of 2 larger than 6) - add extra 0 digits in front of the base 2 number, up to the required length:
    60(10) = 0011 1100(2)
  • 5. To get the negative integer number representation in signed binary one's complement, replace all the 0 bits with 1s and all 1 bits with 0s (reversing the digits):
    !(0011 1100) = 1100 0011
  • 6. To get the negative integer number, signed binary in two's complement representation, add 1 to the number above:
    -60(10) = 1100 0011 + 1 = 1100 0100
  • Number -60(10), signed integer, converted from decimal system (base 10) to signed binary two's complement representation = 1100 0100