How to judge irrational numbers and rational numbers? And how to get the numbers under the root sign! ?

An irrational number is an infinitely circulating decimal, such as 3. 12476 ...

Rational numbers are integers (positive integer, negative integer, 0) and fractions (positive fraction, negative fraction).

Kaigen: For example! Root number 3364, root number,

Let's look at the square of the following 4, 1 ~ 10. What's the final number? The answer is 8, 2.

Look at the 33rd, 1 ~ 10. Which number's square is closest to 33 (the one before 33)? The answer is 5.

Then the possibility is 58 or 52! (Correct answer: 58)

Count the last one and find the correct answer!

Go home and have a try. Practice makes perfect! !