Column vertical method:

(1) Write the first addend in the top line first. If the two digits are different, write the number with more digits first.

(2) Write the second addend on the following line. If the two digits are different, write the one with fewer digits. The second number should be aligned with the digits of the first number.

(3) Write "+"before the second number.

(4) The symbol "=" in the formula is indicated by a horizontal line and written below the second number.

(5) The calculation results of two numbers should be written below the horizontal line and aligned with the numbers above.