The first is to learn geometry: I also learned some in primary school, which is very simple. For example: front view, left view, right view, top view (that is, the view from front, left, right and above ~)

Then there are rational numbers: integers and fractions are collectively called rational numbers. There are addition, subtraction, multiplication and division of absolute values, reciprocal and rational numbers, mixed operations, and then scientific counting methods, using calculators.

Then I learned algebraic expressions: monomial, polynomial, (monomial and polynomial are collectively called algebraic expressions) monomial coefficient, monomial degree, polynomial term and polynomial degree. This should be the hardest part of this semester.

Basic plan: regular polygon, line segment, ray, straight line, 1 flat angle = 180, 1 rounded corner = 360, and 1/60 of1is a point, which is recorded as 1'

Unary linear equation: An equation contains only one unknown, and the exponent of the unknown is 1. This equation is called a linear equation, which is actually no different from the equation of primary school.

Data collection and arrangement: refers to the sampling survey ~ frequency histogram of the general survey. According to the maximum and minimum values of the given data, there are bar statistics, fan statistics and discount statistics learned in primary school.

Hope to adopt ~ thank you