Then draw an arc with 0 point as the center, and the point passing through the number axis is the root number ten. . . The teacher should have said it in class. . That's what you mean when you say painting. .

There are also comparisons between real numbers and those with root signs. . I come from Jiangsu, too. The second day of junior high school seems that the second chapter is mainly about irrational numbers. A common flattening method with root sign or estimated value.