Every two bits from the cell to the left are a segment. If there is a decimal, every two digits from the right of the decimal point are used to separate the parts. Find the complete square number not greater than the first number on the left, that is, the quotient. Subtract the quotient from the first part on the left and write their difference in the second part on the right as the first remainder.
Multiply the quotient by 20 and try to divide the first remainder, and the largest integer is the trial quotient. Multiply the quotient by 20, add the quotient, and then multiply the quotient. If the product obtained is less than or equal to the remainder, write this trial quotient after the quotient as a new quotient. If the product obtained is greater than the remainder, reduce the trial quotient and try again until the product is less than or equal to the remainder.
The meaning of square root.
Square root is also called quadratic square root, which is expressed as positive and negative root sign, in which the square root belonging to non-negative number is called arithmetic square root, positive number has two real square roots, and the two real square roots are in opposite directions, negative number has no square root, and the square root of 0 is 0.
Find the square root because each complement needs two digits, so when the root number is more than one digit, make sure that the complement cannot be sandwiched between decimal points. For example, three digits must be operated separately from hundreds, and ten digits and one digit are added when complement is added.
The property of square root is divided by positive number. If there is a square root, there must be two, which is the opposite number. In a real number system, negative numbers cannot be squared. Only in a complex system can negative numbers be squared. The square root of a negative number is a pair of conjugate pure imaginary numbers.