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The rules for binary subtraction:
X Y X – Y Factopedia
0 0 0 – 0 = 0
0 – 1 = 1
0 1
(borrow 1, so that 10 – 1 = 1)
1 0 1 – 0 = 1
1 1 1 – 1 = 0
For example, let us subtract the binary number (111) from (1000) .
2
2
1 1 Google's first post on
0 (10) (10) (10) _____ Borrow
X (formerly Twitter)
1 0 0 0 was ‘I’m 01100110
– 1 1 1 01100101 01100101
01101100 01101001
0 0 0 1
01101110 01100111
00100000 01101100
Let’s CatCh uP 01110101 01100011
01101011 01111001
Subtract the binary number 1001 from 10001.
00001010’, which
translates to I'm
feeling lucky.'
Tech Fact
Modern day binary number system was invented by
Gottfried Lebiniz in 1679.
Let’s BaCk-uP
A number system is a method of counting and representing If you multiply a
numbers. number by 9 and
The total number of digits used in a number system is called its add the digits of the
base or radix. resulting number till
Computers use the binary number system with a base of 2. the result is 1 digit, it
The decimal number system consists of ten digits from 0 to 9. will always be 9.
The binary number system consists of two digits 0s and 1s. For example,
The octal number system is used as a shorthand representation 45 x 9 = 405
of long binary numbers. 4 + 0 + 5 = 9
The hexadecimal number system consists of 16 symbols from 0
to 9 and A to F.
Number System 13

