Vertical addition of three numbers:

(1) Write the first number, then the plus sign, then the second number, then the plus sign, and finally the third number. Write the third number and draw a horizontal line.

In the process of rewriting, we should pay attention to: when doing vertical addition, we should do the following:

(1) The same number is aligned.

(2) Starting from the unit.

(3) If the digits add up to ten, you need to go to the previous digit 1.

Extended data:

Add column vertical formula: column vertical formula

Write directly if the number of digits is the same, and write large if the number of digits is different.

The plus sign is written in seconds, and the horizontal line is drawn in seconds.

Under the horizontal line of the sum of numbers, the sum should also be added to the horizontal line.

References:

Baidu Encyclopedia-Column Vertical