A simple calculator uses numbers and buttons like a magic box. When you press the number 3, it just knows to hold on to that number until you tell it what to do next. Then, if you hit +, it gets ready for another number, and when you hit =, it adds them all together. It doesn’t think, it just follows simple rules like a robot.
Examples
- You press 3 + 2 =, it shows 5
- When you hit × 4, it multiplies the number you had before
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See also
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