1, multiple methods
If you know the dividend and quotient, you can directly divide the dividend by the quotient to get the divisor. For example, if we know that the dividend is 18 and the quotient is 2, then the divisor is 18÷2=9.
2. Simultaneous Equation Method
If we know the dividend and quotient, we can set the dividend as A and the quotient as B, and then we can get the dividend D by simultaneous equation a= bd. For example, if we know that the dividend is 18 and the quotient is 2, then we can set the dividend as a and the quotient as b, and get the equation a=2b. Then substitute the known condition a= 18 to get the divisor D = A-B = 18-.
3. Backward extrapolation method
If you know the dividend and quotient, you can also find the divisor by backward deduction. For example, if we know that the dividend is 18 and the quotient is 2, then we can get the divisor by backward calculation: 18÷2=9.
Ways to learn mathematics well:
1, master basic concepts, basic laws and basic methods. The premise of learning mathematics well is to have a clear understanding and mastery of the basic concepts, laws and problem-solving methods of mathematics. Therefore, in mathematics learning, we need to pay attention to the understanding and application of basic knowledge.
2, finish the topic must be carefully summarized. Every time you finish a math problem, you need to sum up and review it carefully. This can help you deepen your understanding of the topic, master the methods and skills of solving problems, and gradually accumulate experience in solving problems.
3. Infer from each other. In the process of learning mathematics, we should be good at drawing inferences from others, that is, by solving a specific problem, we should learn from others and understand the solutions to similar problems. This is helpful to improve the efficiency and quality of mathematics learning.
4. Analyze the contents of each chapter and make them interrelated. In the process of learning mathematics, we need to integrate the knowledge we have learned and the knowledge before and after. This will help you better understand the knowledge system of mathematics and improve your problem-solving ability and thinking level.
5. Compare similar concepts and laws with formulas, find out their similarities and differences and connections, and deepen understanding and memory. Make knowledge organized and systematic.