Extended data:
The vertical calculation method of three-level division is as follows:
When calculating the division vertically, the position of the first quotient is wrong. When the child saw that the single digit of the dividend was 0, he told the teacher that the end of division was 0, so he could ignore this principle first. The reason is that he is not familiar with vertical division and does not understand it thoroughly.
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 it is not divisible, such as: 4 is not divisible by 7, then use the highest bit and the next bit to synthesize a number to be divisible until it can be divisible by the divisor; 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.
Law of division:
1, the dividend is enlarged (reduced) by n times, and the quotient is correspondingly enlarged (reduced) by n times under the condition that the divisor is unchanged.
2. The divisor is expanded (reduced) by n times, while the dividend is unchanged, and the quotient is correspondingly reduced (expanded) by n times.
3. Dividing the dividend by two divisors is equal to dividing by the product of these two divisors.
Precautions for vertical division:
When the column is vertical, the unit of quotient should be aligned with the unit of dividend. The product of quotient and divisor is written below the dividend. Finally, draw a horizontal line under the product. Write the difference between the dividend and the product of quotient and divisor under the horizontal line.
Vertical idioms of division:
1, dividend-divisor (one horizontal and one apostrophe)-divisor-quotient-product-remainder.
2. When displaying vertical division, the first display is "divisor" (a horizontal apostrophe)-dividend-divisor-quotient-product-remainder.
3. According to the meaning of the formula, write the dividend,-one apostrophe (divisor)-divisor-horizontal line (equal)-quotient-product-remainder.