1. What is split calculation?

Split calculation refers to the method of splitting a large number into several parts for calculation. This method can make the calculation process simpler and clearer, reduce the calculation difficulty and improve the calculation efficiency.

2. The basic principle of split calculation

The basic principle of split calculation is to decompose a number into several easy-to-calculate parts according to the attributes and operation rules of the number, calculate these parts one by one, and finally get the final answer by synthesizing the results.

3. Common methods of split calculation

Combination method: numbers are combined according to certain rules, and then the value of each combined part is calculated, and finally the total result is obtained by adding the partial values. For example, a number can be calculated according to the combination of digits. For example, 1234 can be divided into 1000+200+30+4 for calculation.

Disassembly method: disassemble a larger number into smaller numbers for calculation, and then combine the calculation results. For example, split a two-digit number into single digits and ten digits, and then add the results to get the final answer.

Reverse deduction method: according to the given conditions and known results of the topic, the number of disassembly times is deduced in reverse, and then calculated. For example, the sum or difference of a number given in the title is equal to a certain number, and the division calculation can be carried out by the method of inverse deduction.

4. The application of split calculation

Split calculation is widely used in third grade mathematics, especially in addition and subtraction. Through split calculation, students can better understand the structure and operation rules of numbers and improve the accuracy and speed of calculation. In addition, split calculation also lays a foundation for students to cultivate logical thinking and problem-solving ability.

5. Matters needing attention in split calculation

In the split calculation, we need to pay attention to the following points: reasonable choice of split mode: according to the requirements of the topic and the characteristics of the number, choose the appropriate split mode to ensure that the calculation process is simple and clear.

The calculation process is clear and identifiable: in the operation process, the calculation results of each step should be clear and identifiable to avoid mistakes as much as possible. Check the calculation result: after the calculation is completed, check the final result to ensure the accuracy of the calculation. If necessary, you can use the opposite operation to verify the results.