This is my 8-bit Redstone Subtractor. It takes one number (input A) and then as you may have guessed it subtracts another number from it (input B).
The final answer is then displayed on a 7-segment display for you to see without having to decode binary to see your answer.
I have also made this subtractor so that when the output is negative, is does not blow up, but actually shows the answer as a negative.

Hope you enjoy :)

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