Vertical type means that each transition number is changed by the last transition number, and then the single digits of the last transition number are multiplied by 2. If carry is needed, proceed to 1, then increase the unit number by ten digits, and so on, and add a new operand to the unit number.
There are two main points in the calculation of column vertical pen: the same digit alignment, starting from the unit. The format of exercise books is strictly in accordance with the following requirements. The horizontal formula is written from the left end of the horizontal grid in the math book; Vertical: the first addend is written below the second addend in the horizontal direction, and the plus sign is aligned with the plus sign in the horizontal direction. The same numbers of addend, addend and three must be aligned.