1, we use numbers to represent the division of a fraction, which is easier to understand. I'll write 78÷0.3.

2. Decimal division algorithm: To know the algorithm of fractional division, first change the divisor into an integer, and expand 10 times to 780÷3 to calculate.

3. Column Vertical: This division is expressed vertically, with the dividend inside and the divisor outside.

4. Align the numbers: first divide 3 by 7 on the hundredth place, write the quotient of the hundredth place, and then align the numbers.

5. Continue to calculate: then pull down the number 8 on the tenth, 18÷3, and write the obtained number on the tenth.

6, there is no remainder, we can't forget that you still have a zero, so write zero as the unit of quotient.

Vertical calculation:

Addition: the same number is aligned. If the sum exceeds 10, proceed to 1. (The numbers should be aligned. )

Subtraction: Same number alignment. If it is not enough, borrow 1 from the last digit as 10.

Multiplication: the 1 bit of one number is multiplied by the 1 bit of another number and added to the i+j- 1 bit of the product.

Division: When calculating division vertically, start from most significant bit. If it is not divisible, most significant bit and the next digit are combined into a number for division until the divisor can be divided.