The so-called low-level mistakes mean making mistakes in some very simple details and steps, and "always losing things inadvertently" in the description of the problem, which belongs to making mistakes in a simple step: "copying formulas", resulting in losing some numbers and letters or expressions when copying. Therefore, if you want to solve low-level mistakes, you must find out which specific steps or details you will make mistakes.
How to find it? I provide a method: after completing a set of test questions every time, find your own draft paper and answer sheet, and find out how your wrong questions went wrong, specifically what details went wrong and why; Then suit the remedy to the case, propose a solution and implement it. If it is a small exam, the answer sheet has been put away, and it is impossible to answer the question immediately after finishing it. Just keep the draft when you do the problem, and wait until the answer is given and the answer sheet is issued to find out the specific reasons for the mistake.
Second,
After finding your own wrong steps, you need to correctly analyze the reasons for your mistakes.
Here, I can reveal an experience in advance: most calculation errors are related to "specific calculation habits".
The "calculation habit" here is not a habit such as "concentration" and "neat drafting", but a small operation habit (a small habit about performing an operation step)
When you start to learn a certain knowledge, you may be unfamiliar and make mistakes if you are not careful; But with the repeated use of this knowledge to solve problems, "correctly using knowledge" will become a habit and a skill for you.
The same is true for calculation. When you start practicing some calculations, you can't use it skillfully. Once practiced repeatedly, a correct calculation operation will become a habit.
For example, primary school students are just beginning to learn multiplication, and their skills are not skilled, so in the early stage of simple multiplication, their brains tend to run at high speed, their thinking is very active, and their attention is focused on multiplication (if they are not focused enough, or if they don't understand multiplication well, they are prone to make mistakes); With repeated practice, students will gradually begin to "master" multiplication, and the calculation will become more and more skilled, and the correct rate will be effectively improved; When they have mastered the operation, they can easily perform simple column multiplication, which seems effortless, and their brains do not need to run at high speed, nor do they need to pay special attention to multiplication (other things can be considered). It seems that simple multiplication has been "automated", which means multiplication has become a habit.