How to draw a third grade hand copied math error card

1.To make a card, take out a piece of cardboard, fold it in half, and fold it in half along the center line. Use scissors to cut out the bottom section and place it in the middle of the cardboard.

Use a black pen to write on the top of the cardboard and cut out the colored paper. Then write the wrong question, and after opening it, write the answer corresponding to the question. with double-sided tape.

Glue the cut cardboard to the large cardboard.

2.Use a pen of two colors. For example, a pen with a black refill and a pen with a red refill. The pen with a black refill is used to transcribe the question, and the question should be indicated to be from **, for example, from the unit test of the fourth unit.

question, and copy the question number. The red refill pen can be used to write the answer, write the correct answer, and the answer is best to complete and fill in independently after understanding the meaning of the question.

3.You can bind the error card into a small book, or wear a buckle, so that it is not easy to lose, put it in the school bag, and can be picked up at any time to review and consolidate.

The production of the hand-copied error card includes the following steps:

1. Wrong questions.

2. Correct answer.

3. Ideas, methods and skills for solving problems.

4. The reason for the error.

The card is divided into two with vertical lines in a ratio of 1:2, and the left side is divided into two parts, the upper left is wrong, and the lower left is the reason for the error; The right side is divided into two parts, the left side is the correct solution process, and the right side is the problem solving ideas and methods.

Benefits of making a mistake card:

If you are good at seizing the opportunity to make mistakes and analyze them carefully and carefully, this will not only make up for the shortcomings in knowledge, but also strengthen your memory. The flexible use of knowledge is the ultimate goal of correcting mistakes. Correcting mistakes is actually a process of relearning.

Through the comparison of right and wrong, the understanding of knowledge is gradually deepened, and it is often digested better and refined more refined.

The production of error cards should be divided into categories and bound into a book, so as to facilitate communication. Exchanging these error cards between students can play an eye-opening role and brainstorming.

The production of "Error Card Design" focuses on allowing students to analyze the causes of errors, analyze the meaning of the questions, be able to abstractly summarize the solution methods of a class of problems, summarize the solutions and draw inferences from one another, and cultivate children's ability to analyze mathematical information and solve mathematical problems.

As the name suggests, the error card is to put together the questions that you have done wrong. There are four main aspects of the error sheet.

1. Topics that are done wrong are classified into categories.

Due to the differences in subject content and requirements, we should classify them when making error cards. Each subject has a different form of accumulation.

Language and knowledge points are relatively trivial, so when we accumulate, we have to classify them. Each type of question is written on an error correction sheet. For example:

This is an error correction card that memorizes basic words and phrases; Another error correction card, remember imitation sentences or sentence conversions, reading comprehension question type to make a separate error card, no need to copy the original text, only copy the questions and answers.

2. Write down the analysis process of wrong questions clearly, and draw inferences from one example.

Three: skillfully use color, the important and difficult points are highlighted.

Four: bound into a book, easy to carry.

Conclusion] Error question sheet, in addition to recording the wrong questions, you can also record some correct but particularly important question types. Because knowledge lies in accumulation, but also in review. In a word:

Usually do a good job of wrong question cards, and you don't have to worry about exam review. Master all the key and difficult points, and strive to be the leader in the exam.

<><1.The commutative law of addition: the addition of two numbers to exchange the position of the added number, and the sum is invariant. a+b=b+a

2.Associative law of addition: add three numbers, add the first two numbers first, or add the last two numbers first, and then add the third number, and the sum is unchanged. a+b+c=a+(b+c)

3.Multiplicative commutative law: When two numbers are multiplied, the position of the exchange factor and the product remain unchanged. a×b=b×a

4.Multiplicative associative law: multiply three numbers, multiply the first two numbers, or multiply the last two numbers first, and then multiply the third number, and their product remains the same. a×b×c=（a×b)×c

5.Multiplicative distributive law: If two numbers are multiplied by the same number, you can multiply the two additives by this number, and then add the two products, and the result remains the same. For example: (2+4) 5=2 5+4 5

6.Nature of division: In division, the dividend and the divisor expand (or shrink) by the same multiple at the same time, and the quotient does not change. 0 divided by any number that is not 0 gives 0

7.Equation: The equation in which the value to the left of the equal sign is equal to the value to the right of the equal sign is called an equation. The basic property of an equation: both sides of the equation are multiplied (or divided) by an identical number at the same time, and the equation still holds.

8.Equations: Equations with unknowns are called equations.

9.Unary Equation: An equation that contains an unknown number and the number of unknowns is one-time, is called a unary equation. n yuan - n unknowns; m times - the highest power of an unknown number.

10.Fraction: The unit "1" is divided into several equal parts, and the number of such a part or fraction is called a fraction. 11.Addition, subtraction, multiplication and division of fractions:

Fractions with the same denominator are added and subtracted, and only the numerator is added and subtracted, and the denominator remains the same.

Fractions with different denominators are added and subtracted, first through the fractions, and then added or subtracted.

Multiplication of fractions: use the product of the numerator as the numerator and the product of the denominator as the denominator.

The division of fractions: dividing by a number is equal to multiplying by the reciprocal of that number.

12.Comparison of fraction size: Comparison of fractions with the same denominator, the large numerator is large, and the small numerator is small. Scores with different denominators are compared, first through the scores and then compared; If the numerator is the same, the larger denominator is smaller.

13.Multiply the fraction by an integer, and use the numerator of the fraction and the product of the integer multiplied as the numerator, and the denominator remains unchanged.

14.Multiply fractions by fractions, use the product of the multiplication of the numerators as the numerator, and the product of the multiplication of the denominator as the denominator.

15.The fraction divided by the whole number (except 0) is equal to the fraction multiplied by the reciprocal of this integer.

16.True Fraction: The fraction whose numerator is lower than the denominator is called the true fraction.

17.False fractions: Fractions whose numerator is greater than the denominator or whose numerator and denominator are equal are called false fractions. False score greater than or equal to 1

18.With fractions: Writing false fractions as integers and true fractions is called band fractions.

19.The basic property of fractions: the numerator and denominator of fractions are multiplied or divided by the same number at the same time (except 0), and the magnitude of the fraction does not change.

20.A number divided by a fraction is equal to the number multiplied by the reciprocal of the fraction.

21.The number A divided by the number B (except 0) is equal to the reciprocal of the number A multiplied by the number B.