Convert -750 000 000 059 to a Signed Binary in Two's (2's) Complement Representation
How to convert decimal number -750 000 000 059(10) to a signed binary in two's (2's) complement representation
What are the steps to convert decimal number
-750 000 000 059 to a signed binary in two's (2'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. Start with the positive version of the number:
|-750 000 000 059| = 750 000 000 059
2. 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;
- 750 000 000 059 ÷ 2 = 375 000 000 029 + 1;
- 375 000 000 029 ÷ 2 = 187 500 000 014 + 1;
- 187 500 000 014 ÷ 2 = 93 750 000 007 + 0;
- 93 750 000 007 ÷ 2 = 46 875 000 003 + 1;
- 46 875 000 003 ÷ 2 = 23 437 500 001 + 1;
- 23 437 500 001 ÷ 2 = 11 718 750 000 + 1;
- 11 718 750 000 ÷ 2 = 5 859 375 000 + 0;
- 5 859 375 000 ÷ 2 = 2 929 687 500 + 0;
- 2 929 687 500 ÷ 2 = 1 464 843 750 + 0;
- 1 464 843 750 ÷ 2 = 732 421 875 + 0;
- 732 421 875 ÷ 2 = 366 210 937 + 1;
- 366 210 937 ÷ 2 = 183 105 468 + 1;
- 183 105 468 ÷ 2 = 91 552 734 + 0;
- 91 552 734 ÷ 2 = 45 776 367 + 0;
- 45 776 367 ÷ 2 = 22 888 183 + 1;
- 22 888 183 ÷ 2 = 11 444 091 + 1;
- 11 444 091 ÷ 2 = 5 722 045 + 1;
- 5 722 045 ÷ 2 = 2 861 022 + 1;
- 2 861 022 ÷ 2 = 1 430 511 + 0;
- 1 430 511 ÷ 2 = 715 255 + 1;
- 715 255 ÷ 2 = 357 627 + 1;
- 357 627 ÷ 2 = 178 813 + 1;
- 178 813 ÷ 2 = 89 406 + 1;
- 89 406 ÷ 2 = 44 703 + 0;
- 44 703 ÷ 2 = 22 351 + 1;
- 22 351 ÷ 2 = 11 175 + 1;
- 11 175 ÷ 2 = 5 587 + 1;
- 5 587 ÷ 2 = 2 793 + 1;
- 2 793 ÷ 2 = 1 396 + 1;
- 1 396 ÷ 2 = 698 + 0;
- 698 ÷ 2 = 349 + 0;
- 349 ÷ 2 = 174 + 1;
- 174 ÷ 2 = 87 + 0;
- 87 ÷ 2 = 43 + 1;
- 43 ÷ 2 = 21 + 1;
- 21 ÷ 2 = 10 + 1;
- 10 ÷ 2 = 5 + 0;
- 5 ÷ 2 = 2 + 1;
- 2 ÷ 2 = 1 + 0;
- 1 ÷ 2 = 0 + 1;
3. Construct the base 2 representation of the positive number:
Take all the remainders starting from the bottom of the list constructed above.
750 000 000 059(10) = 1010 1110 1001 1111 0111 1011 1100 1100 0011 1011(2)
4. Determine the signed binary number bit length:
The base 2 number's actual length, in bits: 40.
- 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, 40,
3) so that the first bit (leftmost) could be zero
(we deal with a positive number at this moment)
=== is: 64.
5. 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.
750 000 000 059(10) = 0000 0000 0000 0000 0000 0000 1010 1110 1001 1111 0111 1011 1100 1100 0011 1011
6. Get the negative integer number representation. Part 1:
- To write the negative integer number on 64 bits (8 Bytes), as a signed binary in one's complement representation, replace all the bits on 0 with 1s and all the bits set on 1 with 0s.
Reverse the digits, flip the digits:
Replace the bits set on 0 with 1s and the bits set on 1 with 0s.
!(0000 0000 0000 0000 0000 0000 1010 1110 1001 1111 0111 1011 1100 1100 0011 1011)
= 1111 1111 1111 1111 1111 1111 0101 0001 0110 0000 1000 0100 0011 0011 1100 0100
7. Get the negative integer number representation. Part 2:
- To write the negative integer number on 64 bits (8 Bytes), as a signed binary in two's complement representation, add 1 to the number calculated above 1111 1111 1111 1111 1111 1111 0101 0001 0110 0000 1000 0100 0011 0011 1100 0100 (to the signed binary in one's complement representation).
Binary addition carries on a value of 2:
- 0 + 0 = 0
- 0 + 1 = 1
- 1 + 1 = 10
- 1 + 10 = 11
- 1 + 11 = 100
Add 1 to the number calculated above
(to the signed binary number in one's complement representation):
-750 000 000 059 =
1111 1111 1111 1111 1111 1111 0101 0001 0110 0000 1000 0100 0011 0011 1100 0100 + 1
Decimal Number -750 000 000 059(10) converted to signed binary in two's complement representation:
-750 000 000 059(10) = 1111 1111 1111 1111 1111 1111 0101 0001 0110 0000 1000 0100 0011 0011 1100 0101
Spaces were used to group digits: for binary, by 4, for decimal, by 3.