First, the divisor is converted into an integer, and the decimal point of the divisor is shifted by one or several digits. According to the invariable property of quotient, the dividend should be expanded by a corresponding multiple, that is, the divisor should be moved by several decimal points, and several zeros should be filled after the dividend, so that we can convert the fractional division into the divisible method. For example: 40÷0.5 Move the decimal point of 0.5 by a divisor, and it will change from 0.5 to 5. After 40, a 0 is 400. At this time, it is 400÷5=80, then 40÷0.5=80, and the result comes out.

Dividers can be converted into fractions, and dividing by a number is equal to multiplying the reciprocal of this number. Take 40÷0.5 as an example. 0.5 conversion component number is 1/2, 40 ÷ 0.5 is 40÷ 1/2, which is 40×2=80, which is consistent with the calculation result of the first method.

The last one is the column vertical calculation. According to the method of dividing an integer by an integer, the decimal point of the quotient should be aligned with that of the dividend. If the dividend has a remainder at the end, fill in 0 at the back and continue the division. If the quotient is not enough, you should write 0 somewhere.

arithmetic

In mathematics, when the first-level operation (addition and subtraction) and the second-level operation (multiplication and division) are in the same formula at the same time, their operation order is multiplication and division first, then addition and subtraction. If there are parentheses, the order of operations at the same level is from left to right. Such operations are called four operations. The fourth refers to the calculation rules of addition, subtraction, multiplication and division. The expressions of four operations do not necessarily have four operation symbols. Generally, it refers to the operation of combining the majority into a number with two or more operation symbols and brackets.