Standard writing method of additive carry vertical typesetting

1. Vertical type is also called Cao Cao in ancient China, which is a draft of calculation. At that time, when calculating a large number of numbers, it was difficult for people to calculate with their mouths, and it was not easy to remember the numbers in the calculation process, so they wrote them down vertically to reduce the difficulty of memory and calculate them correctly.

2. The vertical addition is written as follows: 1) Write an addend in the first line: 2) Write a second addend in the second line, with the digits aligned (one digit is aligned with one digit, and ten digits are aligned with ten digits); 3) Write a plus sign on the left of the tenth place in the second line; 4) Finally, draw a horizontal line, which is equivalent to the horizontal "equality".

3, one bit plus one bit: 3+6=9 Write 9 in the next bit of the horizontal line. Ten digits plus ten digits: 1+2=3 Write 3 in ten digits below the horizontal line.

Vertical standard writing method of multiplication carry

1, the last digit of two numbers should be aligned.

2. Write as many numbers as possible above, and write as few numbers as possible below to reduce the times of multiplication.

3. If there is a "0" at the end of both numbers, the last digit of the number can only be aligned before the "0" when writing vertically, and finally the number "0" owned by the two numbers after vertical product is added.

4. Decimal multiplication should determine the position of the decimal point of the product according to the multiple of the decimal.

Law of multiplication:

1, aligned with the same number;

2. Starting from the right, multiply the first factor by the number on each bit of the second factor in turn, and the end of the number will be aligned with which bit of the second factor and which bit of the factor;

3. Then add up the numbers multiplied by several times.

Multiply the product of several numbers by a number so that any factor in the product can be multiplied by this number and then multiplied by other numbers. Multiply a number by the difference between two numbers. You can multiply this number by the minuend and the minuend respectively, and then subtract the product.

Extended data

There are two main points in the calculation of column vertical pen: the same digit alignment, starting from the unit. Beat (you can add ten digits first if you don't carry it, but it is not recommended to add it for later carry addition). In the workbook, the format strictly follows 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.

3. After calculating the vertical columns, don't miss the horizontal numbers.