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Calculation

wasee
in Applied Mathematics

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How do calculators (and computers) add ,subtract etc.? I know it is done through code but how? I shall be grateful if someone helps me understand these very basic ideas.

The numbers are converted into a binary number, these can then be mathematically manipulated using logic gates...

 

Most of the time computers only have adding circuits, and use clever number systems so adding 2 numbers of a set form, can do the same as subtracting them.

 

Have a look in wikipedia at logic gates, binary, and two's complement.

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