The vertical type of 720 ÷ 90 column is as follows:

Analysis: Divide the dividend from the high position first. The dividend is a two-digit number, which depends on the first two digits of the dividend. If 72 is less than 90, it depends on the first three digits of the dividend. 720 divided by 90 equals 8, and the quotient 8 is written in one place. Then subtract the product from the current dividend, and 720 MINUS 720 equals 0.

So: the number of 720÷90 is 8.

If ab=c(b≠0), the operation of finding another factor A by multiplying the product C and the factor B is division, written as c/b, and read as C divided by B (or B divided by C). Among them, c is called dividend, b is called divisor, and the result of a operation is called quotient.

Extended data:

First, integer division algorithm

1. Starting from the most significant bit of the dividend, take out the number with the same number of digits as the divisor (if the number taken out is less than the divisor, take out the number with one digit more than the divisor).

Divide by divisor to get the highest bit of the quotient and the remainder (the remainder may be zero).

2. Turn the remainder into the next unit, add the number on the dividend, and then divide by the divisor (when the divisor is less than this number, the quotient is 0) to get the quotient and the remainder. This continues until all the digits on the dividend are used up, and the final quotient and remainder are obtained.

Second, the divisor is the division of decimals of integers:

1, first removed according to the law of integer division;

2. The decimal point of quotient should be aligned with the decimal point of dividend;

3. If there is a remainder at the end of the dividend, add 0 to the remainder and continue the division.

Third, the divisor is the division of decimals:

1, first remove the decimal point of the divisor to make it an integer;

2. Look at the decimal places of the divisor, and move the decimal point of the dividend to the right by the same decimal places (if the decimal places are not enough, add 0);

3. According to the division calculation in which the divisor is an integer.

Four: the changing law of quotient

1, dividend and divisor expand or shrink by the same factor at the same time, so their quotient remains the same.

2. If the divisor is enlarged (or reduced) by m times, and the divisor remains unchanged, then their quotient will be enlarged (or reduced) by m times.

3. If the divisor is expanded or reduced by m times, and the dividend remains the same, then their quotient will be reduced or expanded by m times.

4. If the dividend is expanded by m times and the divisor is reduced by n times, their quotient will be expanded by (m×n) times.

5. If the dividend is reduced by m times and the divisor is expanded by n times, their quotient will be reduced by (m×n) times.

6. If the dividend is enlarged by m times and the divisor is enlarged by n times, when m > n, their quotient is enlarged by (m÷n) times, and when m < n, their quotient is reduced by (n÷m) times.

7. If the dividend is reduced by m times, the divisor is reduced by n times. When m > n, their quotient is reduced by (m÷n) times, and when m < n, their quotient is expanded by (n÷m) times.

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720÷90 columns are vertical ...

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