Determination of the sum of positive and negative numbers with opposite meanings
Find the reciprocal of the absolute value of the reciprocal of a known number.
The distance between two points on the number axis and the origin is equal to the number represented by a point with a fixed value.
The sum of reciprocal is 0, and the product of reciprocal is 1.
Judge the right or wrong of written expression
Rational number calculation
Non-negative application of absolute power
two
Degree coefficient of single item
Term degree coefficient constant term of polynomial
Judgment and application of similar projects
Addition and subtraction of algebraic expressions
Simplified assessment
Simplifying absolute polynomial with number axis
Discover the value of letters with non-negativity
three
Application of basic concepts of equation
It will be determined whether to use the root of the equation to find the value of the letter coefficient of the root of the equation.
solve an equation
Solving practical problems by using equations
Maybe that's it. It's too subdivided
There is no too difficult topic. The key is to analyze the change of conditions, pay attention to the application of the idea of combining numbers with shapes and discuss the classification of multiple solutions.
Understanding knowledge is the key!