How to improve the mathematical operation ability of senior high school? 1. Put an end to mental arithmetic and oral arithmetic, and write everything on paper.
We have observed that many children with poor computing skills like mental arithmetic and verbal arithmetic when doing calculation problems in class or even in the examination room. Some students even wait and see directly, waiting for other people's calculation results, which is a big taboo. The correct way should be to let students make full use of draft paper, write the calculation process in paper, write strictly, and don't push it. In particular, students who often make mistakes in the current calculation can write down every step of the simplified calculation process on the draft paper as seriously as primary school students and junior high school students in the next calculation. It is strictly forbidden to take a few steps and take it for granted.
2. Understand and skillfully use the calculation sequence to improve the operation efficiency.
The operation sequence we are talking about here refers to the principles and sequences that should be followed in the operation process. The four-distance algorithm we learned in primary school is actually the most elementary operation order, and the operation order we should focus on in high school mainly includes the following three aspects:
First, simplify the order of calculation. Be sure to remember to simplify before calculating, which can greatly simplify the calculation process and improve the calculation accuracy. Simplification in senior high school calculation mainly includes merging similar items, improving common factors and flexibly using various forms of operation formulas learned in junior high school (square difference formula, cubic difference formula, cubic sum formula, complete flattening method).
Some students don't know how to simplify or are too lazy to simplify in the calculation process, which makes the calculation formula very long, and even some students feel that it can't be written down, which will definitely cause problems in calculation.
Second, the selection of general and separation constants. Some students only remember to divide or separate constants when they encounter fractions, but many people don't know to divide or separate constants. Today, the author tells you that it is actually very simple: in the case of summation, the general score takes precedence, and in the case of subtraction, the separation constant takes precedence.
Third, the conversion between high order and low order. The so-called high order means more calculations, a large denominator or a long formula, and the so-called low order means less times and short algebraic expressions or formulas. If we can pay attention to the transformation of high order and low order in the operation process, it will play a magical role in simplifying the complex and greatly improve the calculation speed and accuracy.
3. Learn to self-examine and improve the correct rate.
Senior high school students must learn to check and correct themselves after finishing the calculation problems. Although they may not have comparable answers, they can use special values or alternative methods to check their answers. Once they find that their calculation results are wrong, they should carefully check their calculation process and try to find out the loopholes and correct them. This will greatly improve the calculation accuracy of students.
How to improve the calculation ability of senior high school and do a good job in summary and special training.
For every problem, there are reasons for doing it wrong: the formula is not skilled, the range of the function is ignored, the absolute value is ignored, the trigonometric function is deformed, and you are unfamiliar with it ... sort out the wrong problems and then carry out special training. For each kind of mistakes, we can basically overcome them by training ten similar problems in a row. Compared with blind brushing, the efficiency is quite different.
Everyone is in high school for three years. At the last moment, I can basically master the basic knowledge and mathematical thinking has taken shape. At this time, it is computing power that determines your life and death.