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Binary and Denary Numbers

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Time remaining: Today’s date : all of the things that this COULD mean: even if you think that what you are thinking is daft Tell me…….. 14 th January 2013 1

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What could 1 mean? In computing it could mean….. Binary digit (bit) A computer only recognises switches and 1 means that the switch is ‘On’ In Boolean you only have True or False, 1 means ‘True’

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Key terms Data Binary Denary Nibble Bit Byte Kilobyte Megabyte Gigabyte Terabyte

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Units of computer data 4 bits=1 nibble 8 bits=1 byte 1024 bytes=1 kilobyte 1024 megabytes=1 gigabyte 1024 gigabytes = 1 terabyte 1024 terabytes= 1 petabyte

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Denary & Binary Denary Base 10: The number 217: Binary Base 2: The number 217: 100101 217 1286432168421 11011001

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Converting denary to binary & back again Denary number between 0 – 255: /2 Remainder /2 Remainder /2 Remainder /2 Remainder /2 Remainder /2 Remainder /2 Remainder /2 Remainder

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Method 2 1286432168421

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Have a go Demonstrate your learning: Complete the 2 examples on the learning sheet Challenge (complete on paper): Convert these numbers: 241 100 92 Convert to denary: 10111111 11111111

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