When two numbers with the same sign are added, take the sign of () and add (); when two numbers with different signs are added, take the absolute value () minus the smaller absolute value; () two numbers of () are added to get 0, and a number with 0 is still added to get ()

When two numbers with the same sign are added, take the sign of () and add (); when two numbers with different signs are added, take the absolute value () minus the smaller absolute value; () two numbers of () are added to get 0, and a number with 0 is still added to get ()

The same number is larger than the opposite number