396+ 187=583, not 483. Addition refers to the process of adding two or more numbers. The specific steps are as follows: add two numbers with the same symbol, take the same symbol, and add the absolute values. Add two different symbols with different absolute values, take the symbol with the larger absolute value, and subtract the symbol with the smaller absolute value from the larger absolute value. Two opposite numbers add up to 0. Add a number to 0 and you still get the number.