We can start with the unit price of shoes. If the price of a pair of shoes is X, then the price of three pairs of shoes is 3x. According to the topic, we know that 3x=600. We can further analyze this equation, and try to transform this equation into an equation for a more intuitive understanding.
By moving this term, we can get x=600/3. So we can easily calculate the price of each pair of shoes, that is, the price of each pair of shoes is 200. Steps to make equations for mathematical calculation problems: read the stem carefully and understand the requirements for solving the stem. Determine the known quantity and the unknown quantity, and express them in letters. Suppose the known quantities are a and b, and the unknown quantity is C.
According to the operation rules, list the equations. That is A+B = C. If addition, subtraction, multiplication and division are involved, it can be simplified according to the law of distribution and the law of association. Calculate or deform according to the requirements of the topic. We can directly add A and B to get C, draw a conclusion and synthesize the answer. That is c = a+b.
Skills to solve mathematical calculation problems;
1, carefully examine the questions: examining the questions is the key to solving the problems correctly. Pay attention to the details, read every sentence carefully, make clear the requirements of the topic, and avoid misunderstanding or omission.
2. Determine the operation order: When calculating complex mathematical expressions, pay attention to the operation order, first calculate the power, then multiply and divide, and finally add and subtract. If there are brackets, count them first.
3. Simplify expressions: In the calculation process, mathematical expressions can be simplified, such as merging similar items and extracting common factors, which will help reduce the amount of calculation and improve the speed of solving problems.
4. Using distribution law and association law: When calculating multiplication or addition of multiple numbers, distribution law and association law can be used for simplification. For example, for a×(b+c), it can be written as a×b+a×c to avoid missing multiplication or repeated calculation.
5. Pay attention to symbols: In the calculation process, pay attention to the changes of symbols, especially the operation of negative numbers. For example, -a can be written as a, and -a-b can be written as-a-b.
6. Inspection result: After the calculation is completed, check whether the result is correct. It can be verified by recalculating or checking whether the results are in line with the actual situation.