Rule: The sum of any integer and its opposite<span> is equal to zero. Summary: Adding two positive </span>integers<span> always yields a positive </span>sum<span>; adding two negative </span>integers <span>always yields a negative </span>sum<span>. To find the </span>sum<span> of a positive and a negative </span>integer<span>, take the absolute value of each </span>integer<span> and then subtract these values.</span>