How to correct math problems, math homework?

1 False ab-9= ab= inversely proportional.

2 Wrong Survival rate 100 103<100%.

4 False s=pi*r 2 is not proportional.

5 False 80%A=50%B A:B=5:86 True n 3 (natural number of n>0).

Second, carefully scrutinize and carefully analyze. (Hit the right one" and "hit the wrong one".)

1. ab-8=, then a and b are disproportionate (wrong).

2. 100 saplings were planted in the forest farm, 3 died, and 3 were supplemented, a total of 100 trees survived, and the survival rate was 100%. (False).

3. The three parallelograms with equal area in the figure below are the same size in their shaded areas. (No picture).

4. The area of the circle is proportional to the radius. (Right).

5. A and B two buckets of water, A uses 20%, B uses half, and the remaining water is the same, and the mass ratio of water in the two buckets of A and B is 4:3. (False).

6. According to the rule of 1,8,27,( 125,216, the number in parentheses should be 64. (Right).

The first question is wrong, it should be wrong.

Otherwise correct.

The last 5 you did right, I don't know if you learned the inverse proportion? A and B are inversely proportional. Didn't learn, congratulations on all right. (There is no picture in the third question).

I think the last 4 you got it right.

1. Correct homework in class.

After the new class, simple homework can be completed in class, using the method of competition and group competition, and the classroom will be centralized and uniformly corrected. This can not only improve students' motivation and speed of completing assignments; It can also exercise students' reaction ability, enhance students' sense of competition, and form a positive attitude towards life.

2. Teacher's face-to-face approval.

For the medium, heavy and difficult exercises in teaching, everyone can pass the test, use the extracurricular time to meet the students face-to-face, correct the questions one by one, point out their mistakes in a timely manner, let the students understand the reasons for the mistakes, and ask the students to correct them immediately. No delays.

3. Group correction of homework.

Students of different levels are divided into groups of four. In some exercises in class, the teacher only needs to check one person per group and point out the mistakes, and then he corrects the exercises of the other three people, and supervises and helps them to make corrections. For extracurricular homework, such as exercises taught in class, relatively simple homework, definitions that need to be dictated, knowledge that needs to be consolidated, etc., can also be directly handed over to the group leader to supervise the group members to complete.

Teachers should conduct spot checks on the homework after the group has corrected it to understand the completion and correction of the homework.

4. Self-improvement and mutual improvement.

For some simple exercises, the teacher can report the answers first, and let the students correct themselves or the same table or the front and back tables to correct each other. If there is a problem, ask it immediately, and the teacher will explain it immediately; Or discuss and revise after class, and report to the teacher for problems that cannot be solved. Do so with each student's sense of responsibility.

are very strong, and in a certain sense, they are more detailed than teachers' corrections. The problems of carelessness and lack of self-testing habits that students often have in their learning will be gradually overcome through the regular application of the self-correction method.

5. Correct "typical".

Typical assignments are selected for physical projection and graded by students. This method can not only make students memorable, but also make students feel proud, and even become an opportunity for junior students to transform, so that junior students can succeed in front of the group, produce a "pleasant effect" in their hearts, and stimulate their enthusiasm for learning.

6. Change multiple changes in one question.

Cognition is a step-by-step process. Many students struggle to achieve a high level of assignment at the first time and get a grade that they are satisfied with. In order to motivate students to further improve the quality of their assignments, we can adopt a grading strategy of changing multiple questions and increasing the grade one by one.

When assignments are given to students, if they can correct mistakes, make up for deficiencies, or add better ways to solve problems, they can be given higher grades as appropriate. In order to enhance the effectiveness, teachers can also add some targeted, inspiring, and encouraging eyebrow criticism in the previous correction.

When grading math homework, you should first compare whether the final results are consistent, and if they are inconsistent, all marks will be deducted; Then compare whether each step is correct, and give the corresponding score step by step.

Math homework is graded according to the score and loss of points, and see how the score is assigned out of 100 points.

Mark the mistakes with a red pen and correct them. It's easy to remember the right way to do it.

Points are deducted by steps, some steps are checked, no points are deducted, and there are some formulas.

How to mark primary school math homework?

First of all, you have to see whether the answer to the math problem he did is correct, and then in the process of looking at the answer, you have to see his steps, whether the steps are the same as the prescribed steps? Are all the calculations correct? If the steps and numbers are correct, then just tick the box.

1. Look at the method and form of the question first;

2. Then, look at the steps;

3. Look again to see if the answer is correct;

4. Correct, neat and tidy writing is given excellent or good, and mistakes are corrected.

1.Look at the quality of the finish and the neatness of the writing, and give a grade according to the quality of the work, divided into A, B, C and so on.

2.Questions with many mistakes should be explained to all students in the class; Individual mistakes, individual coaching. Find the corresponding typical question type to practice.