lesson 4 binary number
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BINARY NUMBER3rd GP Lesson
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.
•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.
128 64 32 16 8 4 2 1
100101 =
Binary Decimal
1 0 0 1 0 1
32 4+137
37
128 64 32 16 8 4 2 1
104 =
Decimal Binary
1
104 -64 40
40 -32 8
8 - 8 0
1 0 1 0 0 0
1101000
END OF THE LESSON
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