BCD arithmetic has two operations. 1) Addition 2) subtraction
- BCD Addition is same as binary addition but if result is invalid BCD number, then Add 0110 i.e. 6 into the result to correct it.
- BCD Subtraction is also same as binary subtraction but if result is invalid BCD number then subtract 0110 i.e. 6 from the result to get correct answer.
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