Rounding is an accurate counting reservation method, which is essentially the same as other methods. But the special feature is that rounding is adopted.

The difference between the reserved part and the actual value can not exceed half of the last order of magnitude: if there is a probability of 0-9, the total error of this reservation method is the smallest for a large number of reserved data. This is why we use this method as the basic booking method.

Specific introduction:

How to establish the wrong problem book of mathematics estimation in grade three? I think some children always can't understand application problems. In fact, it also involves the problem of Chinese reading comprehension. Children who read a lot have a good understanding of application problems. Parents can help their children set up the wrong question book, and at the same time, parents can help their children choose some classic questions that are easy to make mistakes. This ability should be taught to children slowly.

This needs to be combined with real life. For example, when you go to the supermarket to buy things, you must prepare as much as possible. Or how many chairs to prepare for visitors, you must also prepare as many chairs as possible, and then you must estimate the size.

Finally, the most important point is that no matter how good the learning method is, if you want to achieve results, you must first have the determination to study hard and persevere. This is the most basic condition for success.

Other methods:

1, children need to be clear about the learning priorities in the usual classroom, attend classes, follow the teacher, and then improve their abilities. Children have no knowledge of mathematics, but they are vague about it in their minds. Parents can help children clear their minds and grow up with their parents.

2. Pay attention to oral arithmetic training, lay a solid foundation for calculation, and how to do math estimation in grade three? I think oral arithmetic is a basic skill that students must master skillfully, and it is one of the most basic and important skills in mathematics learning. Oral arithmetic is related to whether you can successfully learn and master a series of contents such as multi-digit addition, subtraction, multiplication and division, decimal and fractional operations.