The most prominent advantage of quick calculation is its convenience, which is very suitable for students at school. On the basis of mastering written calculation skills, using quick calculation skills to calculate can greatly reduce the calculation burden, save learning time and improve learning efficiency. Improving our ability of observation, analysis, synthesis and oral calculation, and improving the flexibility and agility of thinking can make us no longer afraid of mathematics.
Especially in the exam, the calculation questions are all calculated by pen, which is very cumbersome and time-consuming; Calculators are not allowed in the examination room. If you can use the quick calculation method, you can save a lot of time to analyze the meaning of the questions and review the right and wrong, which will undoubtedly be of great help to improve the test scores.
First, the formula can be practiced.
Some simple expressions are recognized as a character, so the speed and accuracy of operation will be greatly improved.
Especially in the first, second, third and fourth grades of primary school, ordinary children always find arithmetic homework difficult to do and always make mistakes. If children are taught to "recognize formulas", those formulas will come out as soon as they are recognized, and they will be quick and accurate without writing.
Some children have formed the habit of relying on written calculations. Without written calculation, they feel uncertain, so their learning efficiency is too low. In this way, the study pressure in junior high school and senior high school will become even greater. On the surface, there is nothing to learn in primary school mathematics, especially many female students, who have plenty of time to calculate carefully with pens. Math is often scored 100, and many parents often sigh, "My daughter's primary school math is still quite good, and she often gets full marks in math exams. How could she fail in junior high school mathematics? "
These girls are not without problems in primary school mathematics, but their parents and teachers ignore them and never notice that their speed is too slow. From a technical point of view, it is also a serious hidden "error" to do math problems with high accuracy and slow speed, but this hidden error can not be detected from the test paper and is almost ignored by all teachers and parents.
This question is very important. Many students, especially many female students, lost at this starting line. Therefore, in the primary school stage, we must firmly control "recognition" and really pay attention to it. With the growth of age and school age, our academic performance will also improve.
Second, the addition calculation skillfully uses the remainder method.
Clever application of residual value method. When adding skillfully, we can deal with the numbers close to the whole ten, the whole hundred and the whole stem ... as the numbers of the whole ten, the whole hundred and the whole thousand ... first, we can deal with them according to the principle of "subtracting the extra points and adding the less points". We usually call the "odd number" here "residual difference".
Third, be familiar with the law of addition and improve the ability of clever calculation.
Many students may like to add two numbers because it is easier, but what if they meet several or even dozens of numbers? One question is enough to make you dizzy. Breaking the routine and finding shortcuts is the best way to add quickly. To achieve the effect of fast operation, it is most important to master the algorithm of addition.
There are ways to learn, and there are also quick calculations. Mastering methods can improve learning efficiency, and mastering quick calculation methods will naturally greatly improve computing ability.