Secondly, we should form the good habit of careful calculation. The data is clear and the drafts are arranged in a certain order.
Third, don't blindly pursue high speed. Slow is better than wrong, and less is better than scolding. Therefore, in addition to teaching according to the teaching progress, we also arrange two calculation problems (one for clearance and one for simple calculation) every morning in the sixth grade, and attend classes for 5 minutes every day. The school has a calculation and oral calculation competition every month, and there is an examination for the calculation part in the grade.
Oral arithmetic training is:
1, basic training scores are added, subtracted, multiplied and divided by oral calculation.
2. Orientation training
The big number in the denominator is a decimal multiple. Two fractions, the denominator is a prime number. The denominator is neither a prime number, nor a large number, nor a decimal.
A multiple of a number.
3. Memory training
The content of advanced computing is extensive, comprehensive and comprehensive. Some common operations are often encountered in real life. These operations
There is no specific rule in oral arithmetic, which must be solved by strengthening memory training. The main contents are:
The square result of 1 0 ~ 24 in1.natural number;
2.π times this value
3. The decimal values of the simplest fractions with denominators of 2, 4, 5, 8, 10, 16, 20, 25, that is, the reciprocity of these fractions and decimals.
The results of these figures are often used in daily work and real life. After mastering and memorizing skillfully, it can be converted into energy, resulting in high efficiency in calculation.
4. Regular training
Application of "five methods" algorithm. There are positive and negative aspects, as well as integers, decimals and fractions.
Regular training and ... mainly the oral calculation method of the result that the number in the unit is the square of the two digits of 5.
5. Comprehensive training
1. The comprehensive performance of the above situation;
2. The comprehensive performance of integers, decimals and fractions;
3. Comprehensive training of four mixed operation sequences. Comprehensive training is conducive to the improvement of judgment ability, reaction speed and the consolidation of oral calculation methods.
Specific methods:
1. Strictly calculate the flow and standardize the draft calculus.
Calculation specification is the guarantee to improve the calculation accuracy. Students are required to calculate in a standardized format, write neatly and correctly, and keep their homework and papers tidy. Draft is a necessary means for correct mathematical calculation, and many calculation errors are caused by scrawled drafts.
In teaching, I ask students to divide each page of class assignment paper into two parts, and the main process of calculation and its corresponding draft account for half. The draft also requires students to write neatly and orderly. Of course, if you can take it orally, try to take it orally.
During the exam, students are required to make a draft according to the usual requirements, and fold the paper in half. The draft corresponds to the question. This helps students to review themselves in an orderly way, without wasting time rewriting the draft, and checking directly saves time and effort. It is also conducive to cultivating students' rigorous, meticulous, honest and serious work habits, overcoming the bad habits of scribbling and littering drafts, helping teachers find and analyze the causes of errors, and helping students revise and standardize future teaching.
2, strict requirements, grasp the reality, grasp the details.
In order to cultivate students' good computing habits, we must be strict, practical, meticulous and persistent. My approach is: start from scratch, retrain, be strict with requirements, be strict with grasping facts and details, be strict with perseverance, and correct mistakes in irregular calculation in homework, and the teacher must point them out in time;
If there are irregular calculation errors in the exam, you should give detailed comments and teach methods in class (for example, let students change a circle and become the common factor of the standard format circle); Open a "small stove" for students who repeatedly make mistakes.
Conduct self-examination and mutual check on the implementation of calculation norms, and cultivate students' rigorous style of study irregularly. Cultivate students to draft correctly. At first, they should revise the draft as carefully as they revise their homework. The mistakes in the draft also need to be carefully corrected by students. When students gradually develop habits, we should change the details into simple changes, simplify them into spot checks, and focus on students with bad habits.