1353 ÷ 1 1 = 123

12 1 ÷ 1 1 = 1 1

625 ÷ 25 = 25

180 ÷ 45 = 4

120÷ 4=30

Example: 42 divided by 7[ from high to low]:

(1) For example: 42, starting from the first ten digits of 4; If you can't get rid of it, look at the next one.

(2) 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.

(3) If 4 can't be divided by 7 in the division of 42, combine 4 and 2 into a number. If 42 is divided by 7, the quotient is 6.

Precautions for vertical division:

1, when the column is vertical, the unit of quotient should be aligned with the unit of dividend.

2. The product of quotient and divisor is written under the dividend.

Finally, draw a horizontal line under the product.

4. 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.