How to list vertical addition and subtraction?

Vertical calculation method of addition:

Number alignment: number to number, number to number, plus sign moves forward. The calculation starts with digits, and the digits are added, so the digits are written on the digits and the digits are written on the digits.

Vertical calculation method of subtraction:

Align digits, one digit to one digit, ten digits to ten digits, and move the minus sign forward. The calculation starts with a number and then subtracts these numbers. Write one digit by counting, subtract ten digits by counting, and write ten digits by counting.

Extended data:

Vertical calculation refers to a vertical calculation in the calculation process, which makes the calculation simple. In addition calculation, the same numbers are aligned. If the sum exceeds 10, it will move forward to 1. When subtracting, the same numbers are aligned. If it is not enough, borrow 1 from the last digit as 10.

increase

The i-th bit of one number is multiplied by the j-th bit of another number.

It should be added to i+j- 1 bit of the product.

separate

For example, 42 divided by 7.

On a scale of 4 [from high to low]. When calculating the division vertically, start from most significant bit, such as: 42 from most significant bit 4; If not, for example:

If 4 is not divisible by 7, then use the highest bit and the next bit to synthesize a number to be divisible until the dividend can be divisible; For example, if 4 is not divisible by 7 in 42, then 4 and 2 are combined into a number. If 42 is divided by 7, the quotient is 6.

Reference: Baidu Encyclopedia-Vertical Computing