1, decomposition method: a complex calculation problem is decomposed into several simple parts for calculation, and then the results are combined to get the final answer. For example, in the multiplication of two multi-digit numbers, one number can be divided into two or more parts, and then calculated separately and then added.
2. Multiplication relation: When the calculation involves the multiplication relation of specific numbers, this multiplication relation can be used to simplify the calculation. For example, when calculating the multiple of 13, we can use the properties of the multiple of 10 and the multiple of 3 to calculate the multiple of 10 first, and then add the multiple of 3.
3. Approximation: In some cases, it is not necessary to obtain accurate results, and approximation can be used for calculation. For example, some numbers can be approximated, such as 9.8 to 10, 3. 14 to 3, which simplifies the calculation process.
4. Omitting zero operation: When there are multiple numbers multiplied or added in the calculation, including multiple zeros, the calculation steps of these zeros can be omitted. For example, a multiplication problem, if one of the factors is zero, the result is also zero, and the result can be written directly without actual calculation.
5. Factorization: For some complicated multiplication operations, you can try to simplify the calculation through factorization. Breaking a big number into two smaller factors, calculating them separately and then multiplying them can reduce the complexity of calculation.
Methods of learning mathematics
1, theoretical learning: reading textbooks, reference books and materials, and systematically learning theoretical knowledge of mathematics. Understanding concepts, formulas and theorems is the basis of mathematics learning.
2. Practice: Consolidate theoretical knowledge by doing a lot of exercises. Choose exercises with different difficulties, cultivate problem-solving ability and thinking logic, and deepen the understanding of mathematical concepts.
3. Problem-solving skills: master some common problem-solving skills, such as analyzing problems, establishing equations, and deducing proofs. These skills can help you find solutions and strategies to problems faster.