+ - rules on mathematics
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addition (+)
• Addition of two positive integers is a positive integer
• Addition of two negative integers is a negative integer
• While adding positive and negative integers, subtract the integers and use the sign of the largest integer number
subtraction (-)
• If both the signs of the integers are positive, the answer will be the positive integer
• If both the signs of the integers are negative, the answer will be the negative integer
• If the signs of the integers are different, subtract the values, and take the sign from the largest integer value.
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