# lesson 4 binary numbers

Post on 29-Nov-2014

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improved Lesson 4 binary

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• 1. LEARNING OBJECTIVE Learn how to decode binary numbers.
• 2. LEARNING OUTCOMES I can decode decimal numbers to and from binary I can use an ASCII table to decipher an encoded message written in binary I can use a binary calculator to decode binary numbers
• 3. HOW DO COMPUTERS TALK? Is this right? Hello Bill how ya doin? Not bad Steve but my hard drives playing up a bit. I can decode decimal numbers to and from binary I can use an ASCII table to decipher an encoded message written in binary I can use a binary calculator to decode binary numbers
• 4. HOW DO COMPUTERS TALK? NO!!! This is more like it: 10110011 01011010 10000101 10010100 10010100 11010111 10110101 I can decode decimal numbers to and from binary I can use an ASCII table to decipher an encoded message written in binary I can use a binary calculator to decode binary numbers
• 5. COMPUTER TALK Computers communicate and share data using 1s and 0s. This is called: Binary I can decode decimal numbers to and from binary I can use an ASCII table to decipher an encoded message written in binary I can use a binary calculator to decode binary numbers
• 6. BINARY Usually written as 8 bits: The people holding signs would be 1s and those without would be 0s. 128 + + = 11 I can decode decimal numbers to and from binary I can use an ASCII table to decipher an encoded message written in binary I can use a binary calculator to decode binary numbers
• 7. DECODING BINARY The 8 bits represent: 128, 64, 32, 16, 8, 4, 2, 1 So to convert 0 0 0 1 0 1 0 1 we can use the table below: 128 64 32 16 8 4 2 1 0 0 0 1 0 1 0 1 Adding these together gives 21 I can decode decimal numbers to and from binary I can use an ASCII table to decipher an encoded message written in binary I can use a binary calculator to decode binary numbers
• 8. MAIN TASK 1 Use the help sheet called Decoding Binary Numbers to decode your secret message. I can decode decimal numbers to and from binary I can use an ASCII table to decipher an encoded message written in binary I can use a binary calculator to decode binary numbers
• 9. MINI PLENARY What is the secret message? Share it with the rest of the group I can decode decimal numbers to and from binary I can use an ASCII table to decipher an encoded message written in binary I can use a binary calculator to decode binary numbers
• 10. MAIN TASK 2 In pairs (or individually) play the Binary Game and see what score you get: 1. Go to Moodle 2. Year 7 3. PC Basics 4. Binary Lesson 5. Binary Game I can decode decimal numbers to and from binary I can use an ASCII table to decipher an encoded message written in binary I can use a binary calculator to decode binary numbers
• 11. PLENARY Complete the following questions to test your knowledge and understanding of binary 1. The 8 bits represent the following numbers 128, 64,., 16, 8, ., 2, . 2. I can decipher the follow code using the ACSII table: 72 +69 + 69 + 79 3. I can calculate the following binary code: 0, 0, 0, 1, 0, 1, 0, 1 = I can decode decimal numbers to and from binary I can use an ASCII table to decipher an encoded message written in binary I can use a binary calculator to decode binary numbers