Second, the vertical multiplication is as follows:

See if the dividend is an integer multiple of the divisor (such as 10 times, 20 times, 30 times ...); If there is, write directly to the division. For example: 50 ÷ 5 = 10.

If the dividend is not an integer multiple of the dividend, divide the dividend by the sum of the integer multiple of the dividend and another number;

Calculation: Divide the divided two numbers by divisor, and then combine the quotient to get the result.

Extended data:

There are two main points in the calculation of column vertical pen: the same digit alignment, starting from the unit. You can add ten digits first without carrying, but it is not recommended for carrying addition later. The format of exercise books is strictly in accordance with the following requirements:

1, the horizontal formula is written from the left end of the horizontal grid line in the math book;

2. Vertical style: the first addend of horizontal style is written below the second addend, and the plus sign of horizontal style is aligned with the plus sign. The same numbers of addend, addend and sum must be aligned.