2 1 college entrance examination, the topic is abstract, but overall, 70% is about basic skills, and 30% of the topics need to be thought deeply. It is estimated that this year's B test takers' math scores will be about 5 points lower than last year's.

Volume B, Science Question 17, takes the etching rate in chip making as the prototype, designs the application question of probability statistics, examines the examinee's understanding and application of knowledge such as mean and variance, and guides the examinee to establish a correct outlook on life and values.

Volume B and science question 16 have multiple groups of correct answers, and there are many solutions to choose from, which examines the spatial imagination of candidates and has good selectivity.

learn math well

1, the thinking method of combining numbers and shapes

Numbers and shapes are two main objects of mathematical research. Numbers are inseparable from shapes, and shapes are inseparable from numbers. On the one hand, abstract mathematical concepts and complex quantitative relations are visualized, visualized and simplified through graphics. On the other hand, complex shapes can be expressed by simple quantitative relations. When solving application problems, we often use the intuitive help of line segment diagram to analyze the quantitative relationship.

2. Statistical thinking method

Statistical charts in mathematics are some basic statistical methods, and the problem of average application is the thinking method of data processing.