1. The root 5 is approximately 2.236.
2. The first method is to use a calculator. The root sign 5 is an infinite non recurring decimal.
3. The second method is to use written calculation. First, determine that the single digit of root 5 is 2, and then use the square method to calculate the decimal, percentile, and thousandth digit values.
4. Calculation method of root 5: first consider the approximate number 2 * 2=4; 1*2.1=4.41; 2*2.2=4.842; 3 * 2.3=5.29 It can be seen that the root 5 can be calculated with a calculator between 2.2 and 2.3, and the percentile and thousandth places can also be calculated, but the root 5 is an infinite non cyclic decimal.
5. The method of calculating the square root with written calculation: 1. Every two digits from one digit to the left are a section. If there is a decimal point, every two digits from the decimal point to the right are a section. Use "," to separate each section.
6. 2. Find the perfect square not greater than the number of the first section on the left, which is "quotient".
7. 3. Subtract the quotient from the first stanza on the left, and write the second stanza on the right of their difference as the first remainder.
8. 4. Multiply the quotient by 20 and divide the first remainder. The largest integer obtained is the trial quotient (if the largest integer is greater than or equal to 10, use 9 or 8 as the trial quotient).
9. 5. The user quotient multiplied by 20 plus the test quotient and then multiplied by the test quotient.
10. If the product obtained is less than or equal to the remainder, write the trial quotient after the quotient as the new quotient; If the product obtained is greater than the remainder, reduce the test quotient one by one and try again until the product is less than or equal to the remainder.
11. 6. Continue with the same method.
12. If it is a blank filling question, you can directly write down how much the root 5 is equal to.