Square root is also called quadratic square root, which is expressed as √ ~ where the non-negative square root is called arithmetic square root. Positive numbers have two real square roots in opposite directions, while negative numbers have no square roots. Next, I will share with you the square root formula table commonly used in junior high school.

1? = 1 √ 1 = 1?

2? =4 √2 = 1.4 14

3? =9 √3 = 1.732

4? = 16 √4 = 2

5? =25 √5 = 2.236

6? =36 √6 = 2.449

7? =49 √7 = 2.645

8? =64 √8 = 2.828

9? =8 1 √9 = 3

10? = 100 √ 10 = 3. 162

Square root formula

1 squared,11-kloc-0/9: original number plus mantissa, mantissa squared; Per 10 decimal

2.4 1-49 squared: add 15 to the tail, subtract 10 and then square, accounting for 2 digits.

3.5 1-59 squared: mantissa plus 25, mantissa squared accounts for 2 digits.

Square of 4.965438 +0-99: mantissa multiplied by 2 plus 80; 10 minus mantissa square, accounting for 2 digits.

Reference to the above content: square root (mathematical term)-Baidu Encyclopedia