【摘 要】
:
数学是思维的体操,是解决实际问题的工具,而列方程解应用题是用数学解决实际问题的初级形式。 列方程解应用题包括审题、设元、列方程、解方程、检验、答案等六个步骤,其中
论文部分内容阅读
数学是思维的体操,是解决实际问题的工具,而列方程解应用题是用数学解决实际问题的初级形式。 列方程解应用题包括审题、设元、列方程、解方程、检验、答案等六个步骤,其中关键的一步是列方程,即建立已知量与未知量之间的关系等式。应用题中的已知量与未知量是丰富多采的,它们之间的关系也是变力化的。“教学有方,但无定法”,这说明“列方程”的
Mathematics is the gymnastics of thinking, and it is a tool to solve practical problems. The application of solving equations in columns is the primary form of using mathematics to solve practical problems. The application of the column equation solution includes six steps, such as examining questions, setting elements, equations, solving equations, tests, and answers. The key step is the column equation, which is to establish the relationship equation between the known quantity and the unknown quantity. The known and unknown quantities in the application questions are rich and varied, and the relationship between them is also changed. “Teaching is well-organized, but there is no set law,” which explains “column equations”
其他文献
<正> Fundamental problems related to the high-speed combustion are analyzed.Theresult of plasma-chemical modeling is presented as a motivation of experimental a
<正> In order to generate a mutant of Bacillus subtilis with enhanced surface activitythrough low energy nitrogen ion beam implantation, the effects of energy a
<正> In the present study autotetraploid rice IR36-4X was treated by an ion implantationtechnique with nitrogen ion beams.A polyembryonic mutant (named IR36-Shu
奇异的贝加尔湖□詹伦忠(贵州湄潭县湄江中学贝加尔湖位于中西伯利亚高原的南部,最早栖居这里的通古斯人叫它“拉姆”,即“海”的意思,我国汉代称它为“北海”。突厥人叫它“达赖
<正> The possibility of driving poloidal flows by use of ion Bernstein wave is assessed forHeliotron J and EAST devices by means of ray tracing analysis.Sheared
解放四十多年来的高考作文,经历了两个发展阶段: 第一阶段是1951—1977年。这一阶段除1964年是提供文字材料写读后感外,其余的均为惟题作文。1977年刚恢复高考制度,考卷由各
谈谈·“通感”山东/高德宝“通感”是指人们在描述客观事物给人的感受时,依据生活的逻辑,把听觉、视觉、嗅觉、味觉和触觉等沟通起来,凭借各种感觉的相通,互相映照,互相补充,从而具
<正> The collaboratory for the EAST is available, which possesses the capacity to further advance active research on EAST. In doing so, the distance between loc