As long as it is a math problem, it needs constant practice to achieve perfect practice. The number and intensity of exercises can be changed according to the students' acceptance and proficiency.

Irrational number calculation is an important content of junior high school mathematics, which is relatively simple and often used in future mathematics learning. It is recommended that children master it skillfully.

1. The basic operations of addition, subtraction, multiplication and division of irrational numbers are the same as those of rational numbers, including:

a+b=b+a

ab=ba

a(b+c)=ab+bc

2. The operation idea of rational numbers and irrational numbers: merging similar items. Use the law of multiplicative distribution.

3. How to simplify: The idea of simplification is to combine similar terms and denominators in a reasonable way.