Binary means 2. Right?”“Yes, that’s right.“Computers use binary bits. A bit can be thought of as a coin sitting on a table. It’s either heads or tails, or for computers, 1 or 0. It’s convenient to group 4 binary bits into 1 hexadecimal digit.” I wrote 0000 by zero all the way down to 1111 by F. Then pointing to ‘4 0100’, “This is not one hundred. And by the 8 this is not one thousand.”I wrote the numbers 8, 4, 2, and 1 over the binary numbers. “See how 1001 is 8+0+0+1 or 9. Notice the pattern of the binary digits from 0 to F. This will be on the quiz.”They looked shocked. Hiding my hex and binary numbers I wrote 1100. “Quickly now, what is this binary number in decimal?” I looked at my class and waited... Finally, Beth said, “12?”“Are you sure, Beth?”“Well... 8 plus 4 is 12. Is that right?”Yes, you are correct. Chrissy, what is the hexadecimal digit?” I continued to point as Chrissy wrote something in her notebook.She said, “C.”“Good. That is correct.”Then I talked about 8-bit bytes. Roby finished with his shower at a quarter of one and decided that he was being a little silly. She’s his mother, after all, and they love each other. There wasn’t anything that they couldn’t get passed. Besides, he had to face her eventually anyway and he couldn’t stay locked up in his room afraid that she thought less of him now. So, he dressed quickly and headed toward the living room. Mother was sitting on the sofa nursing her baby when he walked into the room. When Joly saw him, she smiled a little apprehensively and looked back down at Niru. “Hi, mother,” Roby said brightly, maybe a little too brightly.”Hi, Roby,” she smiled at him again.”Have you eaten?”She shook her head. “I was about to fix something after I feed your sister.”"Don’t worry, mother,”I said. “i’ll put something together. I learn it from my hostel”Roby made some sandwiches and opened a bag of potato chips, which is what they normally eat for lunch. They sat at the kitchen table, neither of them speaking for.
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