Lesson 4 binary number

1. Binary Number 3 rd GP Lesson

2. What is Binary? Binary, used to describe a place-value number system, or a number belonging to it, that uses 2 rather than the more common decimal system that uses 10 as its base. Each digit in a binary number represents a power of 2 and so can only hold a 0 or a 1. The number 2 functions in binary the way 10 functions in decimal numbers.

3. Since you can only count to 1 before needing another digit, binary numbers are longer to write out than decimal numbers. Most digital information, such as that stored on a computer’s hard drive, is in binary form .

4. 128 64 32 16 8 4 2 1 100101 = Binary Decimal 1 0 0 1 0 1 32 4 +1 37 37

5. 128 64 32 16 8 4 2 1 104 = Decimal Binary 1 104 -64 40 40 -32 8 8 - 8 1 1 1101000

6. End of the lesson