复合计算题求解（Compound computing problem solving）.doc

复合计算题求解（Compound computing problem solving） Composite calculation problem solving three steps -- obviously find fine push mode Shandong normal student The calculation problem is the traditional types, as well as physical examination (senior high school entrance examination) of the compulsory questions, it plays an irreplaceable role in other types of training students in thinking, reasoning, collecting information, effectively eliminate useless information. In recent years around the physical examination papers (senior high school entrance examination), it is not difficult to find, math examination content mainly concentrated in the mechanical, electrical and thermal aspects, these calculations or one based on the contents of these three parts, or related to the contents of the combination, requiring more than one formula (two and above) combination to solving this kind of problem, we will be called complex calculation problems, this problem often has a strong comprehensive. Correctly answer compound calculation questions. Need to grasp the following links: (1) understand: is carefully read the questions, questions. Define the physical process described by the topic, and specify the known quantity and amount of demand. (2) finding a model: to find out the physical concepts, laws and formulas of the known quantity and the quantity to be solved, and that is the physical model of problem solving. (3) thin push: with the help of physical model, it can be pushed from the known quantity to the quantity needed from the fruit to the front and back. Mechanical synthesis The mechanics compound calculation question involves more knowledge, and covers a wide range. To examine the combination of speed, power and power, mechanical efficiency, pulley winding problems usually occur in simple machines, the integrated use of buoyancy formula usually appears in a combination of buoyancy, the buoyancy and buoyancy and examine the density, pressure, power and power as well as the two fo